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�� BIM�MEPAUS MODELS

Mechanical Piping Services Specification

Issued By: BIM�MEPAUS

30 Cromwell Street, Burwood 3205 VIC Australia

Revision: 0

Date October 2014

BIM�MEPAUS


BIM�MEPAUS

October 2014 REV 0

Acknowledgements BIM�MEP

AUS acknowledges the contributions of those organisations involved in the development and review of

this document including principal contributors:

• AECOM

• A.G. Coombs � Projects

• Antec

• Arup

• Autodesk

• D&E Air conditioning

• Fagersta

• Hansen & Yuncken

• Lend Lease

• Norman Disney & Young

• OneSteel

• Reece

• Rayson Industries

• Victaulic

• Watson Fitzgerald & Associates

Formatting conventions In addition to standard text formatting for Section and Clause Headings, Table Headings, etc the table below

shows other text formats that are used in BIM�MEPAUS

Standards and reference documents and their application:

Text Type Example Indicates

Normal italicized text BIM Execution Plan The generic title for a type of document.

Bold italicised text BIM�MEPAUS

Specification The name of a specific referenced document or

standard or term.

Dark red text LOD First reference to a term or abbreviation that is

defined in the BIM�MEPAUS

website glossary

under Practices

Blue text www.bimmepaus.com.au Hyperlink / weblink

Blue italicised text Explanatory notes Specification explanatory notes or reference

information.

Green text Future Develop This indicates sections or requirements which are

still under development but planned to be included

within BIM�MEPAUS

.

Keeping BIM-MEPAUS

Up-to-date BIM�MEP

AUS software and model content is regularly updated to reflect changes in legislation, technology and

industry practice. Feedback and suggestions in relation to the standards via the BIM�MEPAUS

website are

welcome. Updates to software and content are managed and delivered through the BIM�MEPAUS

website to

registered BIM�MEPAUS

users.

Liability Disclaimer

BIM�MEPAUS

makes no warranty, expressed or implied, including but not limited to any implied warranties of

merchantability and fitness for a particular purpose, nor assumes any legal liability or responsibility for the

accuracy, completeness, or usefulness of the information in this document.

In no event shall BIM�MEPAUS

or its agents be liable for damages or losses resulting from your use of, or reliance

on the information provided in this document.

COPYRIGHT © BIM�MEP

AUS

All rights reserved.

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Table of Contents

1 INTRODUCTION ................................................................................................................. 4

1.1 Scope ........................................................................................................................................................ 4

1.2 References ................................................................................................................................................ 4

1.3 Objectives .................................................................................................................................................. 4

2 PIPING MODEL WORKFLOW ............................................................................................ 5

2.1 Model workflow .......................................................................................................................................... 5

2.2 Systems, Services and Specifications ....................................................................................................... 5

2.3 Service Naming Convention ...................................................................................................................... 5

2.4 System Schematic ..................................................................................................................................... 7

2.5 Design Model ............................................................................................................................................ 7

2.6 Construction Model.................................................................................................................................... 7

3 PIPEWORK SYSTEMS ....................................................................................................... 8

3.1 System Designation and Colour ................................................................................................................ 8

3.2 Uniformat Classification ............................................................................................................................. 8

4 PIPING STANDARDS ......................................................................................................... 9

5 PIPING SPECIFICATIONS ............................................................................................... 11

5.1 Specification Development Framework ................................................................................................... 11

5.2 Pipe and Tube Specification .................................................................................................................... 11

5.3 Temperature Constraints ......................................................................................................................... 11

5.4 BIM�MEPAUS

Temperature Classification ................................................................................................. 12

5.5 Pressure Constraints ............................................................................................................................... 12

5.6 BIM�MEPAUS

Pipe Specifications ............................................................................................................. 14

6 PIPING SYSTEM FAMILIES ............................................................................................. 15

6.1 Pipe / Fitting Sizes ................................................................................................................................... 15

6.2 Fabrication Accuracy ............................................................................................................................... 16

6.3 Pipe /Tube Parameters ............................................................................................................................ 16

6.4 Standard Jointing Methods ...................................................................................................................... 16

6.5 Standard Fittings ..................................................................................................................................... 16

6.6 Fitting parameters .................................................................................................................................... 17

6.7 Pipe Equipment ....................................................................................................................................... 17

6.8 Pipe Equipment Parameters .................................................................................................................... 17

7 FOUNDATION PIPING SPECIFICATIONS ...................................................................... 18

8 BIM�MEPAUS TEMPLATE PIPING SERVICES .................................................................. 20

9 PIPING INSULATION ........................................................................................................ 21

ANNEXURE A – PIPING PRACTICE REVIEW

ANNEXURE B – PIPE HANGER PRACTICE REVIEW

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1 INTRODUCTION

1.1 Scope

This document sets out the BIM�MEPAUS

technical specification and modelling workflows for mechanical services

piping and insulation.

Excluded from the current specification and BIM�MEPAUS

template are:

• Seismic restraints;

• Vertical pipe supports;

• Fabricated pipe brackets and pipe stands; and

• Anchoring and expansion systems.

These components of the model require detailed engineering design that is beyond the scope of the current BIM�

MEPAUS

template.

These systems and components are planned for future development:

• High pressure / high temperature systems including steam;

• Spiral Welded Stainless Steel Tube to ASTM A778

• Medical Gases;

• Refrigerant Piping;

• ABS and uPVC pressure services; and

• Pipe hangers for defined applications.

1.2 References

This specification should be read in conjunction with the following documents that provide the supporting

framework for specification and modelling of mechanical services piping systems:

• BIM�MEPAUS

Waterside Systems, Plant and Equipment Schedule – this Excel based schedule

provides the complete listing for all piping systems, plant and equipment names as well as designation of

piping system colours; and

• BIM�MEPAUS

Master Shared Parameter Schedule – this document provides the source for all shared

parameter names used within the BIM�MEPAUS

IFM and MCM models – this Excel formatted schedule

can be referenced to obtain the classification of each parameter as well as its associated GUID.

These documents can be accessed through the BIM�MEPAUS

website.

1.3 Objectives

This specification defines the BIM�MEPAUS

modelling standards and approach to mechanical services piping

systems. Benefits sought from the implementation of the standard include:

• A unified and structured approach to piping and insulation service specification and modelling;

• Reliable piping Design�to�Fabrication and Design�to�Commissioned As�Built workflows;

• A library of constructible piping services within the BIM�MEPAUS

template that meet the majority of project

design and construction requirements;

• The ability to complete a range of design analysis and engineering calculations; and

• Efficient pipework cost take�off.

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2 PIP

2.1 Model workflow

This standard is based on implementation of the

continuous development of

is able to

With the development of the

and engineering

400 model.

The Commissioned As

modifications

cycle.

2.2 Systems, Services and Specifications

A key feature of the

specifications

full potential of

Systems

Gas System

Services

Specification

In BIM�MEP

piping and insulation

respect to

The BIM�

preferences

2.3 Service Naming Convention

The BIM�

• A

• System

• Service specification

The displayed short form name of the service

of options

• Author_

The supporting

• A

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PIPING MODEL

Model workflow


continuous development of

is able to effectively support

With the development of the

and engineering design checks, scheduling, pip

model.

he Commissioned As

modifications to the installation

Systems, Services and Specifications

A key feature of the BIM

specifications. This approach draw

full potential of constructible

Systems define the

Gas System, etc.

Services set the

Specification

MEPAUS

the system and

piping and insulation

respect to downstream

�MEPAUS

template

preferences and pipe segments to allow designers and engineers to model efficiently

Service Naming Convention

�MEPAUS

piping service naming convention

Author

System

Service specification


of options for each system

Author_System

supporting service

Author_ System

MODEL

Model workflow


continuous development of the MEP

support life cycle management of the building

With the development of the BIM�MEP

design checks, scheduling, pip

he Commissioned As�Built Model

to the installation allowing an accurate as


BIM�MEPAUS

approach to pipework modelling is the use of

This approach draw

constructible Revit MEP modelling

define the type of

, etc.

the piping type and routing preferences

Specifications detail the construction standards

system and service must be selected

piping and insulation specification

downstream system engineering validation, coordination and scheduling take

template provides the piping services tha

and pipe segments to allow designers and engineers to model efficiently



Service specification.


for each system type. The service name syntax is:

System_Safe Working Pres

service specification

System _Safe Working Pressure_

WORKFLOW


MEP model through

life cycle management of the building

MEPAUS

constructible

design checks, scheduling, pipework spooling and procurement

Built Model can provide

allowing an accurate as



This approach draws from the Autodesk

Revit MEP modelling

type of reticulation system:

piping type and routing preferences

detail the construction standards

service must be selected

specifications. The use of this modelling approach provides significant benefits with

system engineering validation, coordination and scheduling take

provides the piping services tha




The displayed short form name of the service allows the required

. The service name syntax is:

_Safe Working Pressure_Material_Jointing Method.

specification syntax is:

_Safe Working Pressure_

WORKFLOW

This standard is based on implementation of the Design to Commissioned As

through the project

life cycle management of the building

constructible Revit

ework spooling and procurement

can provide the basis for

allowing an accurate as�built model to be main



the Autodesk Fabrication a

Revit MEP modelling workflows are

reticulation system: Chilled Water System, Heating W

piping type and routing preferences.

detail the construction standards and details for each

service must be selected to

The use of this modelling approach provides significant benefits with


provides the piping services that incorporate pipe types with their associated


piping service naming convention syntax comprises

allows the required

. The service name syntax is:

sure_Material_Jointing Method.

_Safe Working Pressure_ Material Spec


Design to Commissioned As

project delivery to provide

life cycle management of the building services installation

Revit modelling template it is

ework spooling and procurement

basis for the design and documentation of

built model to be main


Fabrication approach to modelling and is important if the

are to be leveraged by designers and constructors.

Chilled Water System, Heating W

and details for each

to model the system and



t incorporate pipe types with their associated


syntax comprises three key

allows the required service to be selected

sure_Material_Jointing Method.

Specification_Jointing Method_Size Range.

chanical Piping Services Specification

Design to Commissioned As�Built

delivery to provide a completed

installation.

modelling template it is planned

ework spooling and procurement will occur

design and documentation of

built model to be maintained through the building’s life

approach to pipework modelling is the use of pipework systems, services and

pproach to modelling and is important if the

to be leveraged by designers and constructors.

Chilled Water System, Heating W

and details for each pipe type.

model the system and nominate


system engineering validation, coordination and scheduling take�offs.


and pipe segments to allow designers and engineers to model efficiently and effectively

key components:

to be selected from the available range

_Jointing Method_Size Range.

BIM


workflow that see

completed as�built mode

planned that all

occur off the Revit MEP

design and documentation of any future

through the building’s life

systems, services and



Chilled Water System, Heating Water System, Natur

nominate the


offs.


and effectively.

components:

from the available range


BIM�MEPAUS


that sees the

built model that

that all system

the Revit MEP LOD

any future

through the building’s life

systems, services and



ater System, Natural

the required


t incorporate pipe types with their associated routing

from the available range


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2.3.1 Service Types

There are three types of services within the BIM�MEPAUS

scheme:

• Design services provided with the template;

• Manufacturer content based services pre�built from BIM�MEPAUS

manufacturer content; and

• User defined services that are BIM�MEPAUS

compliant and generally combine design and/or

manufacturer content based services to meet specification and installation preferences.

Design Services

A number of Design Services are provided in the BIM�MEPAUS

template for each system type that offer a range of

working pressures and material choices.

Examples of design services offered within the template include:

• BMA_CHW�F_1400kPa_CopperTypeB_Brazed_CarbonSteelAPI5L_Welded

• BMA_CHW�R_1400kPa_CopperTypeB_Brazed_CarbonSteelAPI5L_Welded

The associated specification for this Design Service is:

• BMA_CHW�F_2100kPa_CopperTypeB_Brazed_DN15�40_CarbonSteelAPI5LSTDWT_Welded_DN50�600

Manufacturer Content Based Services

BIM�MEPAUS

hosted manufacturer certified content is provided as both component families and complete

services:

An example of such a service could be a 2100kPa HHW service incorporating Carbon Steel Piping and Victaulic®

roll groove fittings:

• BMA_HHW�F_2100kPa_CarbonSteel_VictaulicEPDM

The associated specification for this Manufacturer Content Service could be:

• BMA_HHW�F_2100kPa_CarbonSteelAPI5LSTDWT_VictaulicEPDM_DN50�600

User Defined Services

BIM�MEPAUS

compliant hybrid services are developed by users and may be added to the template to allow

organizations to incorporate their preferences in relation to materials and jointing selections.

An example, of a company specific service to achieve a higher pressure rating and alternative carbon steel

specification is as follows:

• AGC_HHW�F_2100kPa_CopperTypeB_BPressEPDM_CarbonSteeAPI5LSCH40_VictaulicEPDM

The associated specification for this service could be:

• AGC_HHW�F_2100kPa_CopperTypeB_B�PressEPDM_DN15�40_CarbonSteelAPI5LSCH40_

VictaulicEPDM_DN50�250

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2.4 System Schematic

Piping system design should begin with the system schematics and functional control strategies. These are key to

conveying the design intent and the starting point for the modelling of the piping layouts.

Best practice piping schematics convey the system architecture as well as the system engineering and functional

control strategies and should include:

• Building Compartmentation / Levels;

• Pipe sizes and design flows;

• Monitoring and control strategies;

• Pressure Zones within the system;

• Expansion design / anchor locations and forces;

• Vacuum breakers;

• Pipe flushing provisions; and

• Test Points, Venting and drainage provisions.

The BIM�MEPAUS

template is not intended to generate the schematic from the design model and it is envisaged

that schematics will continue to be prepared in AutoCAD format for the foreseeable future.

2.5 Design Model

The BIM�MEPAUS

Revit® Template allows engineers and modellers to design and specify systems using

constructible piping services.

Design piping service specifications are generally either fully welded or brazed construction and connect plant

and equipment to form complete systems. It is important that the pipework and insulation be modelled by both

system and service specification if it is to be fully leveraged within the Design to Commissioned As�built workflow.

The use of BIM�MEPAUS

constructible services allows a range of engineering checks and calculations to be

completed with greater accuracy. The aim is to support the following engineering tasks:

• Design flow calculations;

• Estimation of Design flow system pressure losses;

• Review piping component Safe Working Pressures;

• Review piping component Safe Working Temperature range; and

• Review of piping system specification compliance.

2.6 Construction Model

The virtual build of the design model into the LOD 400 construction model typically involves a number of tasks:

• Value Engineering to determine the most cost effective service to construct the piping system within

specification;

• Change�out of the design content with manufacturer’s certified content for end of line plant and

equipment such as fan coil units and cooling towers, etc;

• Checking option costs against original estimates and/or budget;

• Final services coordination and routing; and

• System engineering checks and finalisation of pressure loss calculations and pump selections.

Once the construction model is finalised it is then possible to:

• Schedule for procurement;

• Complete site layout of pipework hangers; and

• Spool pipework for manufacture.

Final conversion of the model to a commissioned as�built model principally involves the capture of field data into

the model and from a piping perspective should only require minor updates to capture any variations between the

construction model and as�built installation.

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3 PIPEWORK SYSTEMS

3.1 System Designation and Colour

BIM�MEPAUS

provides a naming scheme for piping systems that incorporate a combination of Australian

standards and industry practice.

The BIM�MEPAUS

Waterside Systems, Plant and Equipment Schedule provides the complete listing of systems

and their associated colour designations including RGB colour coding.

The following table lists the foundation systems together with their template colours.

Table 5.1.1 Pipework system designations and colour representations:

Designation System Colour

CHW F&R Chilled Water Blue

MTCHW F&R Medium Temperature Chilled Water Blue

HHW F&R Heating Water Red

HTHHW F&R High Temperature Heating Hot Water Red

CCW F&R Condenser Water Green

CND Condensate Shamrock

REF VENT Refrigerant Shamrock

REF L&S Refrigerant Green

NG Natural Gas Biscuit

For each system the Return Line is a lighter shade of the Flow Line colour to reduce the risk of crossovers.

3.2 Uniformat Classification

All BIM�MEPAUS

mechanical piping services are designated with Uniformat Classification Assembly Code D30 for

HVAC.

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4 PIPING STANDARDS

There are a large number of Australian and international standards that relate to pipe, flange and fitting standard

dimensions, materials and determination of safe working pressure.

AS 4041 defines the requirements in relation to the pressure piping design with most pipe specifications utilising

dimensional and materials specified to comply with standards published and/or endorsed by one or more of the

following American Standards Organisations:

ANSI : American National Standards Institute

ASTM : American Society for Testing and Materials

ASME : American Society of Mechanical Engineers

API : American Petroleum Institute

Standards considered relevant to HVAC mechanical piping services in Australia include:

General Requirements

AS 4041 : Pressure Piping

AS 1074.4 : Structural Design Actions Part 4 Earthquake Actions in Australia

AS/NZS 3500 : National Plumbing and Drainage Code

AS 5601 : Gas installations – General installations

Copper – Water and Gas

AS 1432 : Copper tubes for plumbing, gas fitting and drainage applications

AS 3688 : Water supply – Metallic fittings and end connectors

AS 4809 : Copper pipe fittings – Installation and Commissioning

Copper – Refrigeration

AS/NZS 1571 : Copper � Seamless tubes for air conditioning and refrigeration

Carbon Steel

ANSI/API Spec 5L : Specification for Line Pipe

ANSI/ASME B36.10 : Welded and Seamless Wrought Steel Pipe

ASTM A106 : Standard Specification for Seamless Carbon Steel Pipe for High�Temperature

Service

ASME B16.9 : ASME B16.9 Factory Made Wrought Steel Butt Welding Fittings.

Stainless Steel

ASTM A312 : Seamless and Welded Austenitic Stainless Steel Pipe.

ASTM A778 : Welded and Unannealed Stainless Steel Tubular Products

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Plastics

AS/NZS 1477 : PVC pipes and fittings for pressure applications

AS 4176 : Polyethylene/aluminum and cross�linked polyethylene/aluminum macro�

composite pipe systems for pressure applications

Flanges and Joint Methods

AS 2129 : Flanges for pipes, valves and fittings

ISO 7005�1 : Pipe flanges � Part 1: Steel flanges for industrial and general service piping

systems

ASME B16.5 : Flanges and Bolt Dimensions – Class 150�2500

AS 1721 : General purpose metric screw threads

ANSI C�606 : Grooved and Shouldered Joints

AS 1167.1 : Welding and brazing – Filler metals – Filler metal for brazing and braze

welding

Hangers

AS 2317 : Collared Eyebolts.

Insulation

AS 4426 : Thermal Insulation of Pipework, Ductwork and Equipment – Selection

Installation and Finish.

AS/NZS 4859.1 : Materials for the thermal insulation of buildings � General criteria and technical

provisions.

Painting

AS 2700 : Colour standards for general purposes.

AS 1345 : Identification of the contents of pipes, conduits and ducts

The following standard is not referenced by BIM�MEPAUS

for Mechanical Services Piping Services Specification:

AS 1074 : Steel tubes and tubulars for ordinary service

Whilst commonly specified � this standard is not generally suitable for

mechanical services due to the low pressure rating of the pipe and its lower

quality metallurgy.

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5 PIPING SPECIFICATIONS

5.1 Specification Development Framework

The following provides an overview of the development of the temperature and pressure framework used to generate the BIM�MEP

AUS piping service specifications. This framework should also to be used to define any BIM�

MEPAUS

compliant customized piping service that is created.

5.2 Pipe and Tube Specification

The pipe and tube specifications that form the basis of the piping services within the BIM�MEPAUS

template are:

• Copper : AS1432 Type B

• Copper : AS1432 Type A

• Carbon steel : API 5L Grade B STD WT ERW

• Carbon steel: : ASTM A106 Grade B STD WT Seamless

• Stainless steel : ASTM A312 316L SCH S10 Welded Refer to Annexure A for a review of industry piping practices and applications that form the basis for the nomination of the above piping standards. Spiral wound stainless steel tube to ASTM A778 is extensively used in larger piping sizes, however there is currently limited standardization of fabricated stainless steel tube and hence its inclusion in the template is not able to be readily accommodated. As a consequence, all stainless steel piping is modelled within the template using ASTM A312 pipe.

5.3 Temperature Constraints

A number of material temperature constraints have been considered in the development of the service specifications.

Pipe Material The carbon steel and stainless temperature/pressure band used is 0�200 / 205

oC, this is suitable for the majority

of HVAC applications including most high temperature heating hot water systems. Pressure ratings for copper pipe and fittings are determined predominately by the system operating temperature. AS 1432 provides safe working pressures based on a range of working temperatures. The relevant de�rating factors for higher operating temperature ranges are:

50 to 75 o

C 0.82 76 to 125

oC: 0.79

126 to 150 o

C 0.78 151 to 175

oC 0.68

176 to 200oC: 0.53

Seals Many components within piping systems have seals including most valves, roll grooved couplings and crimp fittings. These seals have design temperature ranges that can determine the upper limit of the overall system operating temperature. The three main types of seals used in HVAC applications and their respective temperature ranges are;

• EPDM [BLACK] �20oC to 110

oC Suitable for water applications

• HNBR [YELLOW] �20oC to 100

oC Suitable for gas applications

• FKM [RED] �20oC to 200

oC Suitable for petroleum based industrial products.

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5.4 BIM�MEPAUS Temperature Classification

Based on the above criteria, BIM�MEP

AUS provides a simplified classification system for Design System Operating

Temperature Ranges as follows:

Low Temperature [LT] � �20 to 50oC

Medium Temperature [MT] � 51 to 110oC

High Temperature [HT] � 111 to 200oC

5.5 Pressure Constraints

5.5.1 Carbon Steel Piping

API 5LGrade B STD WT safe working pressures for seamless carbon steel and ERW carbon steel are rarely a

limiting factor in HVAC applications. The safe working pressure de�rating factor of ERW pipe with respect to

seamless pipe is 0.85.

For Carbon Steel Pipe indicative minimum Safe Working Pressures for BIM�MEPAUS

Low, Medium and High

Temperature applications are:

• ASTM A106 Grade B Seamless STD WT DN20 >> DN600: 3800kPa

• API 5L Grade B ERW STD WT DN50 >> DN600: 3200kPa

5.5.2 Copper Tube

The safe working pressures for copper tube are temperature dependent. The following tables are derived from AS

1432 and provide the nominal pressure ratings for the BIM�MEPAUS

copper tube piping services.

Table 6.4.2.1 AS1432 Copper Type B Safe Working Pressures

AS 1432 COPPER TYPE B

Maximum Safe Working Pressure

kPa

NOMINAL SIZE Low Temperature

>> 50ºC

Medium Temperature

>>110 ºC

High Temperature

>>200 ºC

DN 10 7630 6100 4040

DN 15 5590 4470 2960

DN 20 4110 3290 2180

DN 25 3680 2940 1950

DN 32 2920 2340 1550

DN 40 2420 1940 1280

DN 50 1800 1440 950

DN 65 1430 1140 760

DN 80 1610 1290 850

DN 100 1200 950 640

DN 125 960 770 510

DN 150 1000 800 530

DN 200 720 580 380

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Table 6.4.2.2 AS1432 Copper Type A Safe Working Pressures

AS 1432 COPPER TYPE A

Maximum Safe Working Pressure

kPa

NOMINAL SIZE Low Temperature

>> 50ºC

Medium Temperature

>>110 ºC

High Temperature

>>200 ºC

DN 10 8350 6600 4420

DN 15 6100 4820 3230

DN 20 5560 4390 2950

DN 25 4750 3750 2520

DN 32 3750 2960 1990

DN 40 3100 2450 1640

DN 50 2310 1820 1220

DN 65 1840 1470 970

DN 80 1900 1500 1010

DN 100 1500 1180 800

DN 125 1200 950 640

DN 150 1300 1030 690

DN 200 910 720 480

5.5.3 Stainless Steel Piping and Tube

Stainless steel services are modelled as ASTM A312 SCH S10 welded pipe that provides the following indicative

Safe Working Pressure lower limit for BIM�MEPAUS

Low, Medium and High Temperature applications are:

• ASTM A312 316LWelded SCD 10S DN50 >> DN600: 1850kPa

As stainless steel tube to ASTM A778 is dependent on manufacturer’s specifications with regards to dimensions

and wall thickness it is necessary to refer to manufacturer’s data to determine the safe working pressures for each

tube type. Services should currently be modelled as welded ASTM A312 316L SCHS10 pipe where

manufacturer’s services are not available and the appropriate engineering checks completed off model.

5.5.4 Flange Safe Working Pressures

The following flange pressure rating system are used for flanges that cover the BIM�MEPAUS

low, medium and

high temperature specifications are:

• AS 2129 Table E – 1400kPa

• AS 2129 Table D – 1000kPa

• ISO 7005�1 PN16 – 1600kPa

• ISO 7005�1 PN25 – 2500kPa.

• ASME B16.5 Class 150 – 1400kPa

• ASME B16.5 Class 300 – 4300kPa

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5.5.5 Plant, Equipment and Fittings

The safe working pressure of plant and in�line components should be checked whenever transitioning design

content to manufacturer’s content to assess whether the components are capable of meeting either the required

zone or system working pressure. It should be noted that the pressure rating of a component such as a valve may

be less than the flange or screw connection and may also vary depending on the line size of the component within

a single fitting family.

5.5.6 Zoning System Operating Pressures

Zoning the operating pressures within a system provides opportunities to optimize the system design and is

commonly used to accommodate pressure rating limitations of equipment and fittings within a system and/or take

maximum advantage of the safe working pressure of pipe service selections.

5.6 BIM�MEPAUS Pipe Specifications

The specifications for pipes within the template are based on the material type, operating temperature and default jointing method. For copper it is necessary to specify the copper type and operating temperature range in order to determine the safe working pressure for the tube. This approach is not required with the steel based services as their safe working pressures are not temperature affected within the typical range of HVAC operating temperatures.

• Copper : AS1432 Type B LT

• Copper : AS1432 Type A LT

• Copper : AS1432 Type B MT

• Copper : AS1432 Type A MT

• Carbon steel : API 5L Grade B STD WT ERW

• Carbon steel: : ASTM A106 Grade B STD WT Seamless

• Stainless steel : ASTM A312 316L SCH S10 Welded

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6 PIPING SYSTEM FAMILIES

The families for copper, carbon steel and stainless steel services comprise sizes and engineering data based on

relevant International and Australian standards.

6.1 Pipe / Fitting Sizes

Copper tube and fittings to AS 1432

DN 10

DN 15

DN 20

DN 25

DN 32

DN 40

DN 50

DN 65

DN 80

DN 100

DN 125

DN 150

DN 200

Copper sizes above DN 200 can be modelled however are not part of the BIM�MEPAUS

standard template and

must be added as a custom service incorporating manufacturer specific pressure/temperature ratings and

compliant with the BIM�MEPAUS

modelling specification.

Seamless carbon steel pipe and fittings to ASTM A 106A /ASTM B10.6 and ASTM B16.9

DN 15

DN 20

DN 25

DN 32

DN 40

DN 50

DN 65

DN 80

DN 100

DN 125

DN 150

DN 200

DN 250

DN 300

DN 350

DN 400

DN 450

DN 500

DN 600

Carbon steel pipe to API 5L Grade B ERW / ASTM B10.6

�

�

�

�

�

DN 50

DN 65

DN 80

DN 100

DN 125

DN 150

DN 200

DN 250

DN 300

DN 350

DN 400

DN 450

DN 500

DN 600

Note all pipe below DN 50 supplied in Australia is seamless.

The following ASTM B10.6 sizes are excluded from the above table:

DN 6

DN 8

DN 10

DN 90

DN 550

Stainless Steel pipe to ASTM A312 /ASTM B10.6

DN 50

DN 65

DN 80

DN 100

DN 125

DN 150

DN 200

DN 250

DN 300

DN 350

DN 400

DN 500

DN 600

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6.2 Fabrication Accuracy

Carbon and stainless steel pipe modelling functionality including automatic roll groove and welded pipe gaps and

fitting insertion depths are equivalent to modelling in Autodesk Fabrication and relevant weld and gap standards.

For Stainless Steel and copper tubing dimensions are nominal and additional detailing on the model may be

required to provide required fabrication dimensions typically based on centre lines and face to face dimensions.

6.3 Pipe /Tube Parameters

To support pipework calculations and checks, the following parameters are provided:

• PipeType Text AS1432 Copper TypeB LT

• DN mm 100

• Schedule Text Type B

• OD mm 101.32

• WallThickness mm 2.03

• Mass Kg/m 4.58

• Roughness kS 0.046

• ExpansionCoefficient m/moK 0.0000117

• HVACDesignTempMax oC 50

• HVACDesignTempMin oC 0

• HVACSafeWorkingPress kPa 1210

• ProductCode Text AD_AS1432TypeB_DTM50_DN100

The parameter values related to temperature and working pressures are set by BIM�MEPAUS

to reflect the piping

specification framework.

6.4 Standard Jointing Methods

Slip On and Blind Flanges

Flange : AS 2129 Table E, Table D.

ISO : PN 16, PN25

ANSI � : Class 150 Class 300

Threaded Fittings

Copper : AS 1721

6.5 Standard Fittings

The following fittings are provided for each pipe or tube type:

90 Elbow

45 Elbow

Equal Tee

Reducing Tee

Branch Cut�in

Concentric Reducer

Eccentric Reducer.

Carbon steel fittings and stainless steel are modelled to ANSI B16.9 and B16.28.

There are no corresponding standards for copper fittings – dimensional data is taken from representative

manufacturer information.

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6.6 Fitting parameters

To support pipework calculations and checks, the following parameters are provided within the fitting parameters:

• FittingType Text ELBOW 90DEG LR�RG

• DN mm 100

• Material Text Carbon Steel

• Schedule Text ANSI B16.9

• Mass Kg 32

• K Coefficient KT 0.21


• HVACDesignTempMin oC 0

• HVACSafeWorkingPress kPA 3800

• Manufacturer Text AD_DESIGN

• ProductCode mm AD_ELBOW90LR�RG_ASTMB16.9_CSASTMA106_DN100

The parameter values related to temperature and working pressures are set by BIM�MEPAUS

to reflect the piping

specification framework.

6.7 Pipe Equipment

Butterfly Valve � Lever – Lugged

Butterfly Valve – Geared – Lugged

Ball Valve

Control Valve – Butterfly

Control Valve � Globe

Control Valve � Ball

3�Way Control Valve

Double regulating balancing valve

Check Valve � Wafer

Strainer – Y

Vibration Isolator

6.8 Pipe Equipment Parameters

Valves and other components that are classified as equipment have identity and component specific

quality/performance shared parameters:

• ComponentName Text BV32�3

• PipeEquipmentName Text ButterflyValve�Lugged�TableE

• DN mm 100

• Material Text CarbonSteelEPDM

• Mass Kg 3.2

• K Coefficient Kv 375


• HVACDesignTempMin oC �20

• HVACSafeWorkingPress kPA 1400

• Manufacturer Text AD_DESIGN

• ProductCode mm AD_BV�LGD�TABLE E DN100

Data is based on Manufacturer Data and ASHRAE Design Guides.

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7 FOUNDATION PIPING SPECIFICATIONS

The following foundation piping services are used to generate the design services within the BIM�MEPAUS

template: Copper Tube Services to AS 1432

1. Specification Name Copper Type B 720kPa

Temperature Range Medium Temperature.

Service SWP 720kPa:

Material: Copper: AS 1432 Type B LT

Joints Brazed

Size Range DN10 to DN150

2. Specification Name Copper Type B 1400kPa


Service SWP 1400kPa:


Joints Brazed


3. Specification Name Copper Type A 1400kPa


Service SWP 1400kPa:


Joints Brazed


Carbon Steel Services to API 5L and ASTM A106

4. Specification Name Carbon Steel MT 3200kPa

Temperature Range Medium Temperature

Material Carbon Steel API 5L ERW Grade B STD WT

Service SWP 3200kPa

Joints: Fully Welded

Size Range DN50 TO DN600

5. Specification Name Carbon Steel HT 3800 kPa

Temperature Range High Temperature

Service SWP 3800kPa

Material Carbon Steel ASTM A 106 Seamless Grade B STD WT

Joints: Fully Welded


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Carbon Steel Services to ASTM A312

6. Specification Name Stainless Steel 1000kPa


Service SWP 1000kPa

Material Stainless Steel ASTM A312 316L Welded SCH S10

Joints: Fully Welded / Flanged Table D


7. Specification Name Stainless Steel 1400kPa


Service SWP 1400kPa

Material Stainless Steel ASTM A312 316L Welded SCH S10

Joints: Fully Welded / Flanged Table E


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8 BIM�MEPAUS TEMPLATE PIPING SERVICES

The following design services are provided in the template developed using the Foundation Services Specifications Chilled Water Systems





Specification � for 1400kPa the service transitions to carbon steel at DN100, for 1600kPa at DN65 Medium Temperature Chilled Water Systems

• BMA_MTCHW�F_1400kPa_CopperTypeB_Brazed_CarbonSteelAPI5L_Welded

• BMA_MTCHW�R_1400kPa_CopperTypeB_Brazed_CarbonSteelAPI5L_Welded

• BMA_MTCHW�F_1600kPa_CopperTypeB_Brazed_CarbonSteelAPI5L_Welded

• BMA_MTCHW�R_1600kPa_CopperTypeB_Brazed_CarbonSteelAPI5L_Welded

Specification � for 1400kPa the service transitions to carbon steel at DN100, for 1600kPa at DN65 Heating Water Systems

• BMA_HHW�F_950kPa_CopperTypeB_Brazed_CarbonSteelAPI5L_Welded

• BMA_HHW�R_950kPa_CopperTypeB_Brazed_CarbonSteelAPI5L_Welded



Specification � for 950kPa the service transitions to carbon steel at DN100, for 1400kPa at DN50.

High Temperature Heating Water Systems

• BMA_HTHHW�F_2000kPa_ CarbonSteelASTMA106_Welded

• BMA_HTHHW�R_2000kPa_CarbonSteelASTMA106A_Welded

Condenser Water Systems

• BMA_CCW�F_1400kPa_StainlessSteel316LSCH10_FlangedTableE

• BMA_CCW�R_1400kPa_StainlessSteel316LSCH10_FlangedTable E

• BMA_CCW�F_1000kPa_Stainless Steel316LSCH10_FlangedTableD

• BMA_CCW�R_1000kPa_Stainless Steel316LSCH10_FlangedTableD

• BMA_CCW�F_720kPa CopperTypeB_Brazed

• BMA_CCW�R_720kPa CopperTypeB_Brazed

Condensate Systems

• BMA_COND_1000kPa_CopperTypeB_Brazed

Refrigerant Vent Line C

• BMA_REFVENT_100kPa_CopperTypeB_Brazed

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9 PIPING INSULATION

Pipe insulation and cladding is added to the piping by selecting the required insulation type and thickness.

Piping insulation performance requirements are specified in the National Construction Code that uses climate

zone, systems and system capacity to determine the required insulation R value calculated in accordance with

AS/NZS 4859.1.

The supported insulation types are:

• High Temperature : Rockwool

• Medium Temperature : Glasswool, Closed cell nitrile rubber

• Low Temperature : Polystyrene , Closed cell nitrile rubber

The setting of the insulation specifications within the template are user defined primarily due to the structure of the

National Construction Code requirements in relation to zones, required R values and pipe diameters.

Table 11.1 Typical Insulation Thickness Schedule

Typical Insulation Thickness Schedule (mm)

Rockwool 25 38 50 63 75 �

Glasswool 25 38 50 63 75 �

Polystyrene 25 38 50 63 75 100

Closed Cell

Nitrile Rubber 9 13 19 25 38

Further services can be added to include different facing types and protection including metal, aluminum, PVC

and foil linings.

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ANNEXURE A INDUSTRY PRACTICE REVIEW

Given the large number of standards related to piping and insulation and the relatively small size of the Australian

market, the industry has rationalized products and methods used to complete HVAC piping installations.

The following provides an overview of industry practice and background information to the development of the

services provided within the BIM�MEPAUS

template.

A1.1 Pipe and Tube

The differences between pipe and tube are in part related to their purpose and part by their fabrication.

Pipe standards use internal nominal dimensions as their primary purpose is related to the transfer of fluids and

gases – pipe standards generally use DN to nominate size and schedules to specify pipe wall thickness.

Tube standards use external dimensions as they are often used for structural fabrication – they use exact external

diameters and exact wall thickness.

Carbon steel and stainless steel generally uses piping standards whilst copper and fabricated stainless steel

including spiral welded stainless steel use tube standards.

BIM�MEPAUS

uses nominal diameter for all pipes and tubes but includes the pipe OD and wall thickness within its

parameters.

A1.2 Copper Tube and Fittings

Copper tube is widely used in HVAC piping due to its comparative cost advantages, ease of handling as well as

corrosion resistance; however its use is limited by its available pressure rating which is temperature dependent

within the typical HVAC operating temperature ranges.

Australian copper tube up to DN 200 complies with AS 1432 and is suitable for a wide range of joining methods

including flanging, press�fit, crimp, compression, capillary and brazed joints. The majority of copper tube is Type

B, however where higher design pressure ratings are required Type A tube can be utilised to gain some additional

working pressure rating.

There are no dimensional standards in relation to Australian copper fittings however in most instances this is not

critical provided that centre line to centre line dimensions are used for fabrication.

For applications above DN200, copper tube and fittings can be fabricated to order from specialist suppliers �

temperature and pressure ratings must be supplied by the manufacturer in all cases.

Valves and other in�line components for copper tube are generally threaded up to and including DN 50 and are

typically flanged above DN 50 typically AS 2129 Table E or ISO 7005�1 PN16 or PN25 to match European

sourced line components.

It is noted that New Zealand uses an alternate copper pipe and fitting standard NZS 3501 Copper Tubes for

water, gas and sanitation that is incompatible with AS 1432 tube.

Refrigerant and Medical Gas copper piping is generally specified to AS 1571 and is cleaned and sealed to

minimise the risk of contamination.

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A1.3 Carbon Steel Pipe and Fittings

Carbon Steel pipework is widely used within HVAC piping applications for larger pipe sizes due to either lower

installed cost or its pressure rating. The use of steel however can extend down to DN 32 particularly where floor

take�offs are required for high rise applications.

The following points have been considered in the development of the BIM�MEPAUS

carbon steel piping service:

• Pipe wall thicknesses, dimensions and weights are specified using ASME B36.10. Pipe for Australian

HVAC applications is generally supplied as ASME B36.10 STD Weight – this is equivalent to Schedule

40 up to and including DN 250. (Schedule 40 pipe DN 300 and above is typically a special import).

• ASTM A106 is used to specify the steel quality and strength for high temperature applications.

• ERW pipe is predominately used in Australia and is the most cost effective carbon steel pipe suitable for

the majority of HVAC applications. ERW carbon steel pipe material and strength properties are generally

specified and supplied to comply with API 5L Grade B STD WT. The ERW seam weld introduces a de�

rating factor of 0.85 when compared with seamless pipe that in most applications does not impose a

constraint on its application.

• Seamless pipe to ASTM A106 is generally specified for high temperature applications or where weld

testing and certification is specified due to its improved dimensional tolerances. This seamless carbon

steel line pipe concurrently complies with APL 5L Grade B.

• Carbon Steel Butt Weld fittings are manufactured from seamless pipe to ASTM A106 and compliance

with ASME B16.9 STD WT and ASME B36.10.

A1.4 Stainless Steel Pipe, Tube and Fittings

Stainless steel pipework is normally a special application pipework used where higher corrosion resistance is

required. – The following points are noted in relation to use of the Stainless Steel Services:

• Stainless steel seamless and ERW pipe is specified to ASTM A312 whilst stainless steel spiral tube is

specified to ASTM A778.

• Condenser water systems are generally specified as ASTM A312 TP 316L and/or ASTM A778 TP 316L.

TP 304L is typically used for boiler flue applications due to its suitability for higher operating

temperatures.

• Stainless Steel designated L indicates Low Carbon stainless steel with most project specifications now

requiring the use of low carbon stainless steel.

• Stainless steel pipework are typically supplied as Schedule 10 pipe up to and including DN100, however

some suppliers can supply stainless steel pipe up to DN150. For higher pressure applications it is also

possible to source Schedule 40 pipe in similar size ranges.

• Stainless steel services DN125 and above are typically supplied as 1.6mm spiral welded tube, with

2.0mm and 3.0mm wall thicknesses also available where higher pressure ratings or stiffness are

required. For pressure ratings of stainless steel tube reference should be made to the specific

manufacturer’s pressure rating data.

• For dimensional data related to spiral welded tube reference should be made to the manufacturer’s

technical data as there are no published standards for these components.

• Stainless Steel pipework is normally procured fully prefabricated and passivated from specialist

manufacturers due to the quality advantages that can be achieved with machine welding in a controlled

environment.

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• Whilst stainless steel has a high pressure rating it is noted that it is prone to collapse under negative

pressure due to its thin wall construction. Special care is required in system design to minimise this risk.

• Copper content in stainless steel systems should be minimised as far as possible as copper ions in

solution can cause pitting of stainless steel pipe – in particular along the welded joints.

A1.5 Jointing Methods

In recent times a number of new pipe jointing methods have dramatically changed pipework installation practices.

There are now five principal jointing methods used across various HVAC piping services:

• Threaded

• Flanged

• Brazed

• Crimped

• Roll Grooved

• Welded.

The following practices are noted in relation to these joining methods:

A1.5.1 Welded Connections

• Pipework welding is generally now limited to headers, floor take�offs for heating, chilled water and

condenser water systems or where roll�grooved fittings cannot be used due to spatial limitations. In

addition, pipework for high temperature/high pressure heating water systems tends to be fully welded

and flanged.

• There is a significant difference in welding standards for mechanical and fire protection services – all mechanical services pipe welding should be full penetration welding to AS 4041 to assure weld strength and minimise the risk of joint corrosion.

A1.5.2 Flanged Connections

Carbon Steel

• The majority of flanges are supplied as slip on flanges � these fit over the pipe and are welded into place

on the pipe; three flange tables are generally used AS 2129, ISO and ANSI.

• AS 2129 flanges are supplied as flat slip on flanges: the majority of flanges are Table E providing the

pressure rating of 1400kPA for most applications. Table D is used on some stainless steel pipework

installations where the lower pressure rating of 1000kPA is acceptable.

• ISO PN10, PN16 and PN25 slip on flanges are typically used to connect to in�line and end of line

components supplied with these flanges as standard as well as for higher working pressures when

required. These flanges have raised gasket surfaces and a raised weld ring on the back face.

• ANSI Flanges are generally used for higher temperature and pressure ratings and connection to some

US and international supplied product. Flanges are typically ANSI 150 or 300 and have a similar profile

to the European flanges with a raised gasket face and welding ring on the back face.

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Copper

• Copper flanges are normally supplied as slip on flanges with a loose backing ring and incorporate some

form of electrolysis protection required for where copper connects to steel or stainless steel pipe or

fittings.

• These flanges are also typically used for standard flanged joints as well as connection to valves and

fittings.

A1.5.3 Brazed Fittings

• Brazing and soldering are similar techniques used to join copper pipe using capillary actions. Brazing

uses higher temperatures and 5�15% silver brazing rods that provide a higher working pressure

generally to match the AS1432 safe working pressure.

A1.5.4 Crimping Fittings

• Mechanical compression fittings such as Viega and B�Press are now widely used on copper pipework up

to DN 50 and have largely replaced on site brazing and soldering of small copper pipework. The use of

crimp fittings offers many benefits over brazed or soldered joints including cleaner pipe systems that

require minimal flushing. A normative standard exists between these fittings in relation in relation to

colour coding, pressure and temperature rating.

• It is important to assure that when using crimp fittings that valves and components can still be removed

without the requirement to cut the pipe by the provision of a union connection.

• Crimp fittings should not be used for de�ionised water.

A1.5.5 Roll Grooved

• Roll groove joining is used for the majority of carbon steel jointing due to its site labour savings. The roll

groove is generally interchangeable but not always and the specific manufacturer couplings should be

used to assure the correct roll groove is provided.

• Roll groove valves and in�line components such as strainers generally offer higher pressure ratings than

Table E flanged components.

• Roll groove joining of copper and stainless steel with the exception of spiral wound tube is also generally

permitted.

A1.5.6 Valves

• Valves are now fully imported into Australia and if not supplied as AS 2127 Table E or roll grooved, then

they will generally be supplied as

o ISO PN16 or PN25 valves for most European sourced components

o ANSI 150 / ANSI 300 for most higher pressure rated valves.

Table H flanged valves and fittings are a special order and should generally not be specified if possible.

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ANNEXURE B PIPE HANGER REFERENCE INFORMATION

B1 General Requirements

Resolution of the piping support system is a key engineering responsibility and must address:

• Piping system structural loading;

• Piping system seismic induced structural loading;

• Pipe system expansion, contraction and anchoring; and

• Structure expansion and contraction including vertical building shrinkage.

In addition to the structural loading the hanger design must address:

• Design strength of the hanger rod; and

• Pull out strength of the fixing; determined by the fixing itself and strength of the concrete or steel framing

fixing point.

Specification development for the pipe support and hangers is an engineering design function and the layout

should be completed through the virtual build process to a documented specification.

Piping support spacings are typically specified to comply with AS 4041 and AS 3500 � these are generally

determined by pipe sag and induced pipe stress considerations. They do not address the structural design of the

support or fixing and these generally lead to much closer spacings of the hangers and supports being required,

particularly in the larger pipe sizes.

Set�up of the Revit MEP pipe hanger service is not part of the BIM�MEPAUS

template and remains the

responsibility of the user.

B2 Pipe Support Design Methodology

Pipe hanger spacings used in practice are typically closer than those provided in the relevant Australian

Standards due to the excessive structural loadings that tend to occur with these spacings.

The following provides overview of the engineering principles that are used to define piping hanger service:

Load Determination

The determination of the pipe weight is a function of the pipe and fluid content; reference tables are

available providing nominal mass/m data for AS 1432 Copper tubes and APL 5L carbon steel pipes and

ASTM A312 stainless steel pipes.

Rod Size Determination

The size of the rod used will be determined by the load, the rod strength and the hanger type. A safety

factor of 5 is commonly applied to hanger rod yield strength to determine its design load carrying

capacity.

Rod Sizes are typically selected between M10 to M24.

Fixing Determination

There are a number of fixing types available with fixings typically rated for pull out strength for a specified

concrete strength and/or fixing arrangement. The proposed fixing type should be checked with the

structural engineer and the supplier prior to finalizing the fixing selection.

In many instances a pull out strength test will be required when large pipework is to be hung to verify the

capacity of the structure and fixing combination.

END.

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