ayman method statements 2

8/3/2019 Ayman Method Statements 2

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Cairo International Airport

New Hotel Airotel

METHOD OF STATEMENTS

FOR

FIRE FIGHTING SYSTEM


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TABLE OF CONTENTS

SECTION NO. DESCRIPTION

1- SCOPE

2- PURPOSE

3- REFERENCES

4- SAFETY

5- PROCEDURES


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SCOPE-1

This procedure defines the method used to ensure that the fire fighting system

all pipes, fighting, valves, reducers, expanders, nipples, vents,, expansion and

contraction devices (previously submitted), hangers, brackets, anchors,supports, sleeves, plates, and all accessories and components connected

thereto as an integrated pipe work system, installation, final connections and

workmanship, is correct and acceptable and conforms to the contract

documents and general specifications.

PURPOSE-2

This method statement covers onsite installation of pre-fabricated and site

fabricated steel pipe work, supports, and expansion and anchor points for

firefighting system

REFERENCES-3

3.1- Fire Protection Specification sections 15012, 15051, 15075, 15057,

15121, 15122, 15181, 15185, 15189

3.2- General provisions for HVAC work, pipes and pipe fittings and piping

specifications.

CONSIDERATIONSSAFETY AND ENVIRONMENTAL-44.1- Mechanical superintendent will ensure that only suitable approved, tools,

and materials are used.

4.2- All tradesmen to ensure that the area clean and free from rubbish.


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PROCEDURES-5

PREPARATION FOR INSTALLATION:

Al l materials and documentation relevant to particular section of work

will be by the construction department prior to commencement of work

ensuring that these are of correct type as reviewed by consultant.

Before commencement of any construction works, pre-inspections will be

carried out on all materials prior to them leaving the storage area. The

consultant will be invited to attend this inspection at their discretion.

Before commencement of any construction works, areas and access will beinspected to confirm that they are in a suitable condition for construction

works to commence.

METHOD:-INSTALLATION

Mechanical supervisor will be instruct the tradesmen regarding the

execution of the works and will distribute all necessary approved

construction drawings of the latest revision .The supervisor will also

check that tools and equipments available are in compliance with

the contract requirements.


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Sleeves installationSleeves will be checked and installed by the construction team as follow:-

a-Location: As per approved construction drawings.b-Material: as the sleeve type in the next table.c-Size : equal to outside pipe insulation diameter plus 25mm.d-Length :

i. Floor slabs : equal to floor slab +finish+50mm.

ii. Roof slabs : equal to floor slab + finish +100mm.

iii.Walls and partitions: equal to wall construction + finish.Packing and sealant: the construction team will use Packing Type in the next

table to fill the space between sleeve and the outside

diameter of pipPacking TypeSleeve typelocation

Incombustible, permanently plastic, waterproof, non-stainingcaulking compound or pack with fibrous glass to within 1/2"

of both construction surfaces and finish with caulking

compound as per above. For floor and roof slabs, finish is

required on top side of slab only.

Standard weight galvanizedsteel pipe

Membranewaterprooffloor,roof and wall

Oakum, hempStandard weightgalvanized steel pipe

Non-membrane

water

proof wall

Incombustible, permanently plastic, waterproof, non-staining

caulking compound or pack with fibrous glass to within 1/2"




#18 gauge, galvanized steel

or

Standard weight

galvanized steel pipe

Interior walls

partitions and floors

Oakum, hempStandard weight galvanized

steel pipe with a

continuously welded water

stop of 1/4" steel plate

Exterior Walls

Packed mineral wool sealed with Johns-Manville "Duxseal"

install set screw escutcheons on both sides of wall.Standard weightgalvanized steel pipeInterior fire ratedshaft wallsTable for type of sleeve & Packing


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Piping & support fabrications

Piping Painting procedures as follow:-a- Mechanical supervisor will check that the pipes surface are cleaned

With wire brush and cleaning solution by construction team.b-After cleaning, Construction team will begin to spray the painting

Material using compressor with spray gun or brush.c- Type of painting

i.(BLACK STEEL PIPING) to be painted with two coats of Zinc phosphateprimer, they are to be Finishes painted with two coats of Approved oil paint.

ii.(PIPING run in trenches, shafts, underground) to be painted with two coatsof Zinc Phosphate primer and two Coats of heavy bituminous solution paint.

Piping Joints:a-Threaded fittings : for pipe sizes up to 2".b-Grooved couplings: for pipe sizes 2 1/2" and more.c-Flange adapter will be used in case of flex. Connections or flanged valves.

Jointing method for Grooved pipes:

a-Grooved type couplings (fixed & flexible coupling as manufacture StudyWhich previously submitted) with Grooved fittings at pipe ends Where

Used (size 2 1/2" and more), the constructionteam will chick the grooving

According to manufacturer's recommendation.

b-Type of groove:i. Rolling groove: for size 2 1/2'' and up to 8'

ii. Manufactures recommendations are as in following table:

Piping fabrication

as in following shown:for end of piperoll groovedmakeFirst


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in following shown:fitting aspiping withjointSecond

Jointing method for threaded pipes:a-Pipes ends shall be cut threads full and clean using sharp dies.b-Male threads shall be sealed compound, or pipe joint tape (Teflon).c-Special care shall be taken by construction team for handling

The threaded pipes

d-Tighten joint to leave not more than 3 threads exposed.e-Screwed pipe work shall meet the BS 21Flanged Site Work Joints:The construction team will match flanges within piping system, and at

Connections with valves and equipment and check that:

a- Gaskets used are 4mm thick rubber.

b- Both flange faces are cleaned.

C- Tighten bolts to provide uniformcompression of gaskets

D-No. Of flange bolts shall be meets ASMI B16.5 including bolt

size as the following table:

Bolts Diam.No. of BoltsStandard Pipe Size


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16 mm450 to 80 mm

19 mm8100 to 200 mm

Dielectric Fittings:

The construction team will install dielectric fittings where dissimilarmetals are connected together. These will be marked on the

approved shop drawings.

Pipe Hangers and Supports

Hangers supportPipes hanger work shall meet the following details and the rood size

table:


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Rod size (mm)Maximum distance between hangers (mm)Pipe diameter (mm)

10240025-3210270040

10300050

12330065

12370080

164200100

165100150

195800200

Trapeze Hangers supportTrapeze hanger &wall bracket work shall meet the following details:


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Zone control valve

The construction team will installZone control valve with type of valveand location and all accessories as the show:


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DrainsThe construction team will install drain points at the low points of

the system to drain the system when needed and to avoid traps.Automatic Air Vents:

The construction team will install the automatic air vents at the

highest points of the system, risers, pumps and equipments

Connections with DN 20 inlet connection to release trapped air.

Hydro Testing:

a- The construction team will use ambient temperature water as atesting medium.

b- The construction team will check that, the air vents which

installed at higher point of the system are working to release

trapped air; also the drain points which installed at lowest points

of the system are closed.

c- Subject piping system to hydrostatic pressure equal to 2 times

working pressure for at least 2 hours to examine piping, joints,

and all connections for leakage. Eliminate leaks by tightening,

repairing, or replacing components and repeat hydrostatic test

until there are no leaks.

d- Prepare test report and call the consultant for inspection

PREPARATIONFlashing

a- Flushing is carried out methodically from the main fire water inlet to

The end of the main branches the system.

b- The isolating valves are installed at the drain points indicated to control

The drainage for flushing.

c- All the isolating valves at the drain points are connected to the nearestDrain point by means of hoses.

d- All the drainage valves and main valve are closed.

f- Fire fighting jockey pump is ready to operate to provide the pressured

Water for flushing.

METHOD FLUSHING

a- Operate the jockey pump to provide the pressured water to the system

b- Open the main valve to provide water to the sprinkler pipes


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c- Open the drainage pipes gently one by one to start flushing the system.

d- Thoroughly flush the section to be cleaned with fresh water to

remove any dirt, dross and debris from pipe work.

e- Carry out the flushing until the clean water appears at the drainagePoints.

f- Remove the valves installed at the drainage points and install the

Sprinklers to fill up the system again.

g- On no account should any part of the system be drained and left wet

for any significant time after cleaning, as this will promote rapid

corrosion and possibly necessitate a re-clean.Identification:

a- Valves: A tag with chain will be attached to the valve handle,

as will as marking the ceiling tile to indicate location of valve.

b- Piping: The construction team will apply colour coded tape.

installationSprinkler

The construction team will install sprinkle with type of sprinkler an

location as show details:


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FIRE PUMPSINSTALLATION

A. Mechanical supervisor will Install packaged fire pump systems and accessoriesAs indicated in accordance with Manufacturer's written instructions, requirements of

applicable Standards and with Recognized industry practices to ensure that

installation complies with requirements and Serves intended function.

B. Coordinate as necessary to interface installation of packaged fire pump systems workwith other work.

C. Provide access space around pumps for service.D. Support piping Adjacent to pump such that no weight is carried on pump casings. For

base mounted Pumps provide supports under elbows on pump suction and discharge.

E. Provide drains for bases and seals, piped to and discharging into floor drainsF. Mount unit on vibration isolatorsG.

Provide for connection to electrical serviceH. Lubricate pumps before start-up

I. Check, align, and certify base mounted pumps by qualified millwright prior to start-up


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3.2 INSTALLATIONA. Install in accordance with manufacturer's instructions and NFPA 12

B. Ream pipe and tube ends. Remove burrs. [Bevel plain end ferrous pipe.]

Remove scale and dirt inside and outside before assembly. Blow out pipe

Before nozzles or discharge devices are installed.

C. Route piping in orderly manner, concealed, plumb and parallel to building

Structure, and maintain gradient. Install piping to conserve building space, and

Not interfere with use of space and other work.

D. Securely support piping in accordance with ANSI/ASME B31.1 with allowance

For CO2 thrust forces, and thermal expansion and contraction.E. Use grooved mechanical couplings and fasteners only in accessible locations.

Roll groove piping only.

F. Install unions downstream of valves and at equipment or apparatus connections.

G. Prepare pipe, fittings, supports, and accessories for finish painting..

H. Identify in accordance with ANSI/NFPA 12 requirements. Place directional

Arrows and system labels wherever piping changes direction and minimum 20

Feet (6 meters) on straight runs.

I. Secure cylinders as indicated on Drawings. [Where manifold, mount and

Support by rack as indicated. For each system provide same size cylinders

Containing equal amounts of liquid.]

J. In rooms with suspended ceiling tiles, clip or retain tiles within 4 foot (1.2 m)

radius of the nozzles to prevent lifting during discharge.K. Install wiring in accordance with Section 16120 & 16180 requirements.

L. Make final connections between equipment and system wiring under direct

supervision of factory trained representative of manufacturer.

M. Install engraved plastic instruction plate, detailing emergency procedures, at

control panel and at each manual discharge and abort switch location. At

control panel identify control logic units, contacts, and major circuits with

permanent nameplates.

N. At hazard area walls pack space between pipe, pipe sleeve or surface penetration

with mineral fiber with elastomeric calk to depth of 1/2 inch (13 mm). Provide

Escutcheons where exposed piping passes through walls, floors, and ceilings.

Seal pipe penetrations of fire separations.

O. Locate discharge nozzle approximately 6 inches (150 mm) above or below

ceiling and 6 inches (150 mm) below raised floors. Avoid interference with


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other piping and equipment.

P. Locate remote manual releases at one or more doors to protect area where

indicated. Locate deadman abort switch adjacent.

Q. Provide signal to building fire alarm system. Refer to Section 16721.

R. Provide interlock with automatic closing door releases.

S. Provide interlock with motorized dampers. Refer to Section 15952.

Incombustible, permanently plastic, waterproof, non-staining

caulking compound or pack with fibrous glass to within 1/2"




ayman method statements 2

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