developing process flow diagrams and tutorials

7/27/2019 Developing Process Flow Diagrams and Tutorials

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Common Process Equipment Symbols Used in Developing Process Flow Diagrams (PFD) and P&IDs I

Piping and Miscellaneous Symbols:

Valve Symbols:
http://3.bp.blogspot.com/-XbOdegaWkh8/TyBNzIyb_XI/AAAAAAAAAOs/ce1RAA5S0rg/s1600/Valve+symbols+PFD.jpghttp://2.bp.blogspot.com/-KHoqCLcROp8/TyBLSm1JcxI/AAAAAAAAAOk/cLdim6znH1Q/s1600/Piping+and+Valves+PFD+symbols.jpghttp://3.bp.blogspot.com/-XbOdegaWkh8/TyBNzIyb_XI/AAAAAAAAAOs/ce1RAA5S0rg/s1600/Valve+symbols+PFD.jpghttp://2.bp.blogspot.com/-KHoqCLcROp8/TyBLSm1JcxI/AAAAAAAAAOk/cLdim6znH1Q/s1600/Piping+and+Valves+PFD+symbols.jpg


2/18

Centrifugal Pump Symbols:

Positive Displacement Pumps Symbols:

Storage Vessels Symbols:
http://1.bp.blogspot.com/-_3MRASJ8Bxs/TyBQGHGcy6I/AAAAAAAAAPE/axn6bAQh104/s1600/Storage+Vessels+Symbols.jpghttp://2.bp.blogspot.com/-Pi4tNtbYHyo/TyBPMqlEsdI/AAAAAAAAAO8/k_-K54cNDQc/s1600/Positive+Displacement+Pumps+Symbols.jpghttp://3.bp.blogspot.com/-eHjvDXvOPJo/TyBOPcEJ4sI/AAAAAAAAAO0/tz8vdQ-YsSQ/s1600/Centrifugal+Pump+Symbols.jpghttp://1.bp.blogspot.com/-_3MRASJ8Bxs/TyBQGHGcy6I/AAAAAAAAAPE/axn6bAQh104/s1600/Storage+Vessels+Symbols.jpghttp://2.bp.blogspot.com/-Pi4tNtbYHyo/TyBPMqlEsdI/AAAAAAAAAO8/k_-K54cNDQc/s1600/Positive+Displacement+Pumps+Symbols.jpghttp://3.bp.blogspot.com/-eHjvDXvOPJo/TyBOPcEJ4sI/AAAAAAAAAO0/tz8vdQ-YsSQ/s1600/Centrifugal+Pump+Symbols.jpghttp://1.bp.blogspot.com/-_3MRASJ8Bxs/TyBQGHGcy6I/AAAAAAAAAPE/axn6bAQh104/s1600/Storage+Vessels+Symbols.jpghttp://2.bp.blogspot.com/-Pi4tNtbYHyo/TyBPMqlEsdI/AAAAAAAAAO8/k_-K54cNDQc/s1600/Positive+Displacement+Pumps+Symbols.jpghttp://3.bp.blogspot.com/-eHjvDXvOPJo/TyBOPcEJ4sI/AAAAAAAAAO0/tz8vdQ-YsSQ/s1600/Centrifugal+Pump+Symbols.jpg


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Centrifugal Compressors Symbols:

Positive Displacement Compressors Symbols:
http://1.bp.blogspot.com/-rm6Z16aimVY/TyBRFUJEqRI/AAAAAAAAAPU/aEVVXlp4Y6A/s1600/Positive+Displacement+Compressors+Symbols.jpghttp://4.bp.blogspot.com/-eiXLJM4-HHQ/TyBQnKzDSfI/AAAAAAAAAPM/KSIaeuESKag/s1600/Centrifugal+Compressors+Symbols.jpghttp://1.bp.blogspot.com/-rm6Z16aimVY/TyBRFUJEqRI/AAAAAAAAAPU/aEVVXlp4Y6A/s1600/Positive+Displacement+Compressors+Symbols.jpghttp://4.bp.blogspot.com/-eiXLJM4-HHQ/TyBQnKzDSfI/AAAAAAAAAPM/KSIaeuESKag/s1600/Centrifugal+Compressors+Symbols.jpg


4/18

Motors Symbols in PFDs:

Heat Exchangers Symbols:
http://2.bp.blogspot.com/-ViDkqNwFjJQ/TyGmNL400fI/AAAAAAAAAQM/aJFg0pxawTw/s1600/Heat+Exchangers+Symbols.jpghttp://3.bp.blogspot.com/-p8NgDuI1mjg/TyGGmmZ6SUI/AAAAAAAAAQE/ap7fAnJ9zZ4/s1600/Motors+Symbols+in+PFDs.jpghttp://2.bp.blogspot.com/-ViDkqNwFjJQ/TyGmNL400fI/AAAAAAAAAQM/aJFg0pxawTw/s1600/Heat+Exchangers+Symbols.jpghttp://3.bp.blogspot.com/-p8NgDuI1mjg/TyGGmmZ6SUI/AAAAAAAAAQE/ap7fAnJ9zZ4/s1600/Motors+Symbols+in+PFDs.jpg


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Cooling Towers Symbols:

Furnaces and Boilers Symbols:
http://4.bp.blogspot.com/-cEDGz-5ob84/TyGnwFp5fVI/AAAAAAAAAQc/RMFedjsXxsI/s1600/Furnaces+and+Boilers+Symbols.jpghttp://2.bp.blogspot.com/-Ctu5ATfvAek/TyGm02k-iqI/AAAAAAAAAQU/5wBjfLm-b0A/s1600/Cooling+Towers+Symbols.jpghttp://4.bp.blogspot.com/-cEDGz-5ob84/TyGnwFp5fVI/AAAAAAAAAQc/RMFedjsXxsI/s1600/Furnaces+and+Boilers+Symbols.jpghttp://2.bp.blogspot.com/-Ctu5ATfvAek/TyGm02k-iqI/AAAAAAAAAQU/5wBjfLm-b0A/s1600/Cooling+Towers+Symbols.jpg


6/18

Distillation Towers Symbols:

Reactor Symbols:
http://1.bp.blogspot.com/-YABYXXiw5XY/TyGo9pKomnI/AAAAAAAAAQs/8jKD54Xy3dc/s1600/Reactor+Symbols.jpghttp://3.bp.blogspot.com/-2Hf88Uy_B5o/TyGoaMtHKsI/AAAAAAAAAQk/5xAJQnXf72w/s1600/Distillation+Towers+Symbols.jpghttp://1.bp.blogspot.com/-YABYXXiw5XY/TyGo9pKomnI/AAAAAAAAAQs/8jKD54Xy3dc/s1600/Reactor+Symbols.jpghttp://3.bp.blogspot.com/-2Hf88Uy_B5o/TyGoaMtHKsI/AAAAAAAAAQk/5xAJQnXf72w/s1600/Distillation+Towers+Symbols.jpg


7/18

Piping and Instrumentation Diagrams: Tutorials I

The P&ID above is that of a typical industrial heat exchanger. You look at the P&ID and you wonder:

what is going on? Well the P&ID looks a little complicated if you are new to Piping and instrumentation

diagrams. To understand what is actually going on, let us first get to understand what the process whose

piping and instrumentation diagrams is depicted above is all about.

The Process

The heat exchanger is a process unit in which steam is used to heat up a liquid material. The material,

called feedstock, is pumped at a specific flow rate with pump P-101 into the pipes passing through the

heat exchanger chamber (called the tube) where heat is transferred from steam to the material in the

pipe. It is usually desired to regulate the temperature of the outlet flow irrespective of the change in the

demand (flow rate) of the feedstock or change in the inlet temperature of the feedstock. The regulation

of the outlet temperature is achieved by automatic control of the steam flow rate to the heat exchanger(E-101). The P&ID diagram utilizes certain standard symbols to represent the process units, the

instrumentation, and the process flow.


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The Piping and Instrumentation Diagram:

Instruments on the P&ID

Recall that instruments are represented in P&IDs by bubbles defined by ISA standard 5.1. In this P&ID,

there are two sets of instrument bubbles used: plain circle bubble and a circle bubble with a solid line

across it. As indicated on the P&ID, the plain circle bubbles represent field mounted instruments while

circle bubbles with a solid line across represent control room mounted instruments.

Signals on the P&ID

Two kinds of signals are represented on the P&ID. They are:

Electrical signals Pneumatic signals

Electrical signals are represented by the dashed lines with red colour on the P&ID. The pneumatic signals

are represented by solid lines with double strip across. They are colored blue on this P&ID

Detailed description of P&ID

FIC 101Flow Indicator and Controller. This control room mounted instrument controls the flow of cold

feedstock entering the tube side of the heat exchanger by accurately positioning a control valve (FCV

101) on the cold feedstock flow path. A Flow transmitter, FT 101, in conjunction with a flow sensor

(orifice plate) measures the flow of cold feedstock and sends a corresponding electrical signal to

controller, FIC 101, in the control room. The controller then compares the measured flow with its set

point and sends an electrical signal to a I/P(current to pneumatic) converter, FY 101, which converts the

electrical signal to a corresponding pneumatic signal used to accurately position the control valve FCV

101. Similarly, FT 103 measures the flow of steam into the exchanger using a flow sensor (orifice plate)

and sends a corresponding electrical signal to Flow Recorder, FR 103 to indicate the measured flow.

FR 103

Flow Recorder. This control room mounted instrument records the steam flow rate. It measures thesteam flow rate in conjunction with a flow transmitter, FT 103 and a flow sensor (orifice plate).

HS 101

Hand Switch, ON/OFF. This hand switch is mounted in the control room .This switch turns on/off cold

feedstock pump P-101. When the switch is in the ON condition, the pump is running. When the switch is

in the OFF condition, the pump is not running.

HV 102

Hand Valve, OPEN/CLOSED. This valve opens/closes the steam block valve through which steam is

routed from the header to the shell side of the heat exchanger.

PAL 103

Pressure Alarm Low,

This alarm fires should the steam header pressure be less than the pressure required for the heat

exchanger to work accurately. Note that the alarm module is mounted in the control room.

PI 100

Pressure Indicator, This control room mounted instrument displays the steam pressure at the shell side

of the heat exchanger. This pressure measurement is done using pressure transmitter, PT 100.


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PI 103

Pressure Indicator, This instrument displays the steam header pressure. Pressure measurement is also

done using pressure transmitter, PT 103

TAH/L 102

Temperature Alarm High/Low,

This alarm fires should the temperature of the feedstock at the exchanger outlet goes beyond or falls

below stipulated temperatures for high or low temperature of the feedstock coming out of the

exchanger.

TI 103

Temperature Indicator

This control room mounted instrument displays the temperature of the steam entering the shell side of

the heat exchanger.

TT 102

Temperature transmitter,

This is a field mounted instrument that measures the temperature of the outlet feedstock from the heatexchanger. This measured temperature is converted to electrical signal that is sent to TAH/L 102 for

alarming purposes and TIRC 102 for indication, recording and controlling purposes.

TIRC 102

Temperature Indicator, Recorder, and Controller,

This control room mounted instrument controls the temperature of the feedstock at the exchanger

outlet by accurately positioning the valve TCV 102 that regulates the steam flow to the exchanger. TT

102 measures the temperature of the feedstock at the exchanger outlet. This measured temperature is

sent in the form of electrical signals to TIRC 102. This controller then sends a corresponding electrical

signal to an I/P (current to pneumatic) converter, TY 102 which converts the electrical signal to

pneumatic signal that is then used to accurately position the temperature control valve, TCV 102. Notealso, the electrical signal from TT 102 is also used for alarming purposes (TAH/L 102)

TR 101

Temperature Recorder,

This control room mounted instrument displays the temperature of the feedstock entering the

exchanger. This is done by using temperature transmitter TT 101, which measures the temperature of

the cold feedstock entering the exchanger in the form of electrical signals and sends it to TR 101.


10/18

Piping and Instrumentation Diagrams Tutorials II: Pressure Control

Tutorial Question

Develop the piping and instrumentation diagram (P&ID) of a gas vessel which has natural gas entering it

through an inlet header and leaving it through an outlet gas header. The gas vessel will show the

following instrumentation:

(a) An inlet valve that is manually controlled on the gas inlet header

(b) A pressure transmitter and pressure indicator to indicate inlet gas pressure

(c) A flow transmitter and flow indicator to measure and indicate inlet flow. Also show instrumentation

for high and low flow rates alarms

(d) A pressure safety valve to relieve excess pressure to a flare system

(e) A hand valve on the gas outlet header

(f) A pressure transmitter, a pressure indicator and controller and control valve for monitoring and

controlling gas vessel pressure

(g) An alarm to indicate high vessel pressure

(h) A check valve on the outlet header

(i) A pressure transmitter and a pressure indicator on the outlet header to indicate outlet pressure

Based on the above tips I have developed the piping and instrumentation diagram (P&ID) below

for the gas vessel instrumentation:

The P&ID of the Gas Vessel

Let us now take a detailed look at the piping and instrumentation diagram developed from the

information given above. Please note that the tag numbers on the P&ID have been arbitrarily

added to give the P&ID an orderly look.
http://1.bp.blogspot.com/-N88s5CkRKVg/TcXmbJSWn3I/AAAAAAAAAKE/g0Vk3jv25PE/s1600/Pressure+control+P&ID.jpg


11/18

On the developed P&ID, please note that:

The plain instrument bubble without a solid line across represents a field mountedinstrument.

The instrument bubble with a solid line across represents an instrument that is mountedin a central control room.

Developing the P&ID(a) We were told the gas vessel instrumentation should have an inlet valve. On the P&ID, inlet valve HV

107 is provided to manually regulate gas flow into the vessel.

(b) A pressure transmitter and a pressure indicator is to be provided to indicate inlet pressure. On the

developed piping and instrumentation diagram, PT 101 and PI 101 are provided for this purpose. PT

101 measures the inlet pressure and sends the measured value via electrical signals to the pressure

indicator, PI 101

(c) A flow transmitter and a flow indicator are to be provided to measure and indicate flow. Also,

instrument for alarming high and low flow rates are to be included. On the developed P&ID, FT 102

measures the flow and FI 102 indicates the flow. Also FAH 102 is a flow alarm switch for indicatinghigh flow rates while FAL 102 is for indicating low flow rates

(d) A pressure safety valve is to be provided in the instrumentation to relieve and vent excess pressure

to a flare system. On the developed P&ID, PSV 104 is provided to relieve excess pressure and

protect the gas vessel.

(e) A manually controlled hand valve is to be provided on the gas vessel outlet header. On the

developed P&ID, hand valve, HV 105 is provided.

(f) A pressure transmitter, a pressure indicator and controller and a control valve are to be provided.

On the developed P&ID, PT 103 is the pressure transmitter that measures the gas vessel pressure

and sends the signal (electrical) to PIC 103, a pressure indicator and controller to indicate the

measured pressure and at the same time send a command pneumatic signal depending on its set

point to actuate the pressure control valve, PCV 103

(g) Instrumentation for alarm to indicate high vessel pressure is to be provided. On the developed

P&ID, pressure alarm switch PAH 103 is used to signal an alarm for high vessel pressure

(h) A check valve on the outlet header is to be provided in the vessel instrumentation. On the

developed P&ID, CV 106 is the check valve provided to prevent back flow into the gas vessel

(i) Lastly, a pressure transmitter and pressure indicator is to be provided to measure and indicate gas

outlet pressure. On the developed P&ID, PT 108 and PI 108 are performing this function.


12/18

Piping and Instrumentation Diagrams Tutorials III: Flow and Level Control

Tutorial Question:

It is desirable to have a small control system to control liquid flow and consequently level in an open

tank. The description of the control system is as follows:

(a) A flow control valve will be used to regulate flow. This flow control will be based on flow

measurement in an orifice meter

(b) We want to automatically adjust the setpoint of the flow controller with the aid of a level control

loop. As level is being measured, the set point of the flow control valve is adjusted automatically. If

the level goes up, the set point of the flow control valve should be lowered and vice versa

(c) The Orifice meter should have a secondary device to transmit a 4 20mA signal to the control room.

The secondary device should be able to indicate flow rate locally at the Orifice meter.

(d) The secondary device on the Orifice meter is required to send this 4 - 20mA electronic signal to a

controller in a central control room. The flow rate should be indicated on this controller

(e) The control room will send a 4 20mA signal from the controller to the control valve. At the control

valve, we will use an I/P converter to provide pneumatic signal to control our valve. The flow control

loop will have a loop number 100.

(f) The level of the tank will be measured using a transmitter, with local indication on the transmitter.

(g) We also want to send a 4 20mA level signal to a level controller in the control room. This controller

will display the level of the tank in the control room.

(h) The level control instrumentation in the tank will make provision for activating high and low levelalarms seen in the control room whenever the level goes too high or too low

(i) The tank should have a local sight glass or gauge for indicating level locally for plant operators

(j) The level controller will also send the level signal via wire to the flow controller in the control room,

where the setpoint for the flow control valve will be adjusted. The level control loop will have the

loop number 101


13/18

From the information provided above, develop the piping and instrumentation diagram (P&ID) for this

control system.

Below is the piping and instrumentation diagram I have developed from the all the information provided

above in our tutorial question:

Let us now examine the information we used to develop the piping and instrumentation diagram above

in detail:

(a) A flow control valve is required to regulate flow. On the developed P&ID, FV 100 is the control valve

provided to regulate flow

(b) The setpoint of the flow controller is to be adjusted by a level control loop. In the P&ID above, LIT

101 and LIC 101 make up the level control loop that helps to adjust the setpoint of the flow

controller FIC 100

(c) The Orifice meter is required to have a secondary device that can transmit a 4 20mA signal to the

control room and should also indicate flow locally in the plant. In the above P&ID, the Orifice meter

is shown to have ,FIT 100, which is a flow indicator and transmitter. The indicator indicates flow

locally in the plant and the transmitter transmits the required 4 20mA signal to the control room.
http://1.bp.blogspot.com/-n4_g1dwo5x4/TdN1y0X7ArI/AAAAAAAAAKQ/nOJtCFNtkcA/s1600/p&id+instrumentation+symbols.jpg


14/18

(d) The secondary device on the Orifice meter (in this case, FIT 100) is required to send a 4 20mA

electronic signal to a controller in the control room. In the piping and instrumentation diagram I

have developed above, FIT 100 is sending a 4 20mA signal to flow indicator and controller, FIC 100,

located in the control room. The controller has an indicator function to indicate flow in the control

room.

(e) The flow controller in the control room is required to send a 4 20mA signal down to the flow

control valve. On the flow control valve, an I/P (current to pneumatic converter) will then provide

the pneumatic signal required to actuate the control valve. In the P&ID developed, the 4 20 mA

signal sent to the I/P converter from FIC 100, is converted into pneumatic signal that is used to

control the flow control valve, FV 100.

(f) For level measurement, it is required that the open tank should have a transmitter with a local

indication function. In the piping and instrumentation diagrams that I have developed above, LIT

101 is a level indicator and transmitter that is measuring the level of the tank and indicating it locally

in the plant. The transmitter helps to transmit the measured level signal to the control room.

(g) A 4

20mA level signal is required to be sent to a level controller in the control room. In the P&IDabove, LIT 101 is sending the required 4 20mA level signal to level controller and indicator , LIC

101. Note that because it is required that level should be displayed in the control room, LIC 101 has

an indicator function.

(h) The level instrumentation is required to have alarms for high and low levels in the tank. In our P&ID,

the level signal from LIT 101 is used for indicating high and low level alarms respectively via LAH 101

(level alarm high) and LAL 101 (level alarm low).

(i) A level gauge or sight glass is required for rough level indication. This is provided by LG 101 in the

above P&ID

(j) The level controller LIC 101 is required to send a level signal via wire to our flow controller, FIC 100

so as to adjust the setpoint of this controller. In the P&ID above, LIC 101 is sending the measured

level signal to FIC 100. This signal is being used to adjust the setpoint of the flow controller FIC 100.

If the level in the tank becomes too high, the setpoint of FIC 100 is automatically reduced and if it

becomes too low, it is increased.


15/18

Introduction to HACCP

HACCP (Hazard Analysis and Critical Control Point) is a system that helps food businessoperators look at how they handle food and introduces procedures to make sure the food

produced is safe to eat.

As part of routine inspections, the enforcement officer will check that the business has an

appropriate HACCP-based food safety management system in place.

HACCP guidance

The Food Standards Agency has developed a range of food safety management packs for

different sectors of the food industry to help food business operators manage their food safetymanagement procedures. For more information, go to the links below.

Safer food, better business (SFBB) helps small food businesses and childminders put in place

food safety management procedures and comply with food hygiene regulations.

CookSafeis the FSA in Scotlands food safety management system to help caterers comply withlegal requirements.

RetailSafe, also developed by the FSA in Scotland, assists retailers handling unwrapped high-

risk foods to comply with legal requirements.

Safe Catering is FSA Northern Ireland's food safety management guide to help catering

businesses produce a food safety management plan based on HACCP principles and to keep

records appropriate to their business.

HACCP in meat plants contains a short guide to completing a HACCP plan, information on

training, a meat plant HACCP manual and CD ROM, model documents and a food safetymanagement diary.

Wild Game Guide is for those producing wild game meat for human consumption, either at anapproved game handling establishment or under an exemption allowed by the Food Hygiene

Regulations. It includes the Wild Game HACCP Plan.


16/18

ISO 9001:2000 Quality management systems

Abstract

ISO 9001:2000 specifies requirements for a quality management system where an organization

1. needs to demonstrate its ability to consistently provide product that meets customer andapplicable regulatory requirements, and

2. aims to enhance customer satisfaction through the effective application of the system, includingprocesses for continual improvement of the system and the assurance of conformity to

customer and applicable regulatory requirements.

All requirements of this International Standard are generic and are intended to be applicable to all

organizations, regardless of type, size and product provided.

Where any requirement(s) of this International Standard cannot be applied due to the nature of an

organization and its product, this can be considered for exclusion.

Where exclusions are made, claims of conformity to this International Standard are not acceptable

unless these exclusions are limited to requirements within clause 7, and such exclusions do not affect

the organization's ability, or responsibility, to provide product that meets customer and applicable

regulatory requirements.

ISO 14001:2004 Environmental management systems

Abstract

ISO 14001:2004 specifies requirements for an environmental management system to enable anorganization to develop and implement a policy and objectives which take into account legal

requirements and other requirements to which the organization subscribes, and information about

significant environmental aspects. It applies to those environmental aspects that the organization

identifies as those which it can control and those which it can influence. It does not itself state specific

environmental performance criteria.

ISO 14001:2004 is applicable to any organization that wishes to establish, implement, maintain and

improve an environmental management system, to assure itself of conformity with its stated

environmental policy, and to demonstrate conformity with ISO 14001:2004 by

a) Making a self-determination and self-declaration, orb) Seeking confirmation of its conformance by parties having an interest in the organization, such as

customers, or

c) Seeking confirmation of its self-declaration by a party external to the organization, or

d) Seeking certification/registration of its environmental management system by an external

organization.


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All the requirements in ISO 14001:2004 are intended to be incorporated into any environmental

management system. The extent of the application will depend on factors such as the environmental

policy of the organization, the nature of its activities, products and services and the location where and

the conditions in which it functions.

ISO 22000:2005 Food safety management systems

Abstract

ISO 22000:2005 specifies requirements for a food safety management system where an organization in

the food chain needs to demonstrate its ability to control food safety hazards in order to ensure that

food is safe at the time of human consumption.

It is applicable to all organizations, regardless of size, which are involved in any aspect of the food chain

and want to implement systems that consistently provide safe products. The means of meeting any

requirements of ISO 22000:2005 can be accomplished through the use of internal and/or external

resources.

ISO 22000:2005 specifies requirements to enable an organization

-- To plan, implement, operate, maintain and update a food safety management system aimed at

providing products that, according to their intended use, are safe for the consumer,

-- To demonstrate compliance with applicable statutory and regulatory food safety requirements,

-- To evaluate and assess customer requirements and demonstrate conformity with those mutually

agreed customer requirements that relate to food safety, in order to enhance customer satisfaction,

-- To effectively communicate food safety issues to their suppliers, customers and relevant interested

parties in the food chain,

-- To ensure that the organization conforms to its stated food safety policy,

-- To demonstrate such conformity to relevant interested parties, and

-- To seek certification or registration of its food safety management system by an external

organization, or make a self-assessment or self-declaration of conformity to ISO 22000:2005.


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PAS 220:2008 has been withdrawn and replaced by ISO/TS 22002-1.

PAS 220:2008 Prerequisite program on food safety for food manufacturing has been withdrawn and

replaced by ISO/TS 22002-1. This change will be the first of many related to the family of prerequisite

programs for food safety and are expanded to include Design and Manufacture of food packaging,

Manufacture of Animal Food, as well as related logistical and distribution programs.

PAS 220:2008

Prerequisite program on food safety for food manufacturing; was released as a Publicly available

Specification in 2008. Like other publicly available specifications for food safety, notably PAS223;

PAS220 and PAS 222 all are developed by industry for industry, to specify requirements that support the

implementation ofISO 22000- Food Safety Management Systems-Requirements for any organization in

the food chain and when used under the requirements of FSSC 22000 2011 fully comply with the GFSI

revision 6 guidance document*.

PAS220 addresses prerequisite program (PRP) requirements specific to the food manufacturing industry

sub sector. Covering such requirements as;

Construction and layout of buildings and associated utilities Layout of premises, including workspace and employee facilities Supplies of air, water, energy and other utilities Supporting services, including waste and sewage disposal Suitability of cleaning equipment and its accessibility for cleaning, maintenance and PM Management of purchased materials and ingredients Measures for the prevention of cross contamination Cleaning and sanitizing Pest control Personal hygiene Other relevant manufacturing operations

PAS220 fulfills the ISO 22000 requirements for Prerequisite programs as established

in clause 7.2.3.
http://www.nqa-usa.com/services/iso22000/http://www.nqa-usa.com/services/iso22000/http://www.nqa-usa.com/services/iso22000/http://www.nqa-usa.com/services/iso22000/

developing process flow diagrams and tutorials

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