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1. INTRODUCE1. INTRODUCE1. INTRODUCE1. INTRODUCE

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1.PIPNG SYSTEM:

ASSEMBLIES OF PIPING COMPONENTS USED TO CONVEY,DISTRIBUTE, MIX, SEPARATE, DISCHARGE, METER,CONTROL OR SNUBS FLUID FLOWS.

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2.PIPING COMPONENTS:

MECHANICAL ELEMENTS SUITABLE FOR JOINING ORASSEMBLY INTO PRESSURE-TIGHT FLUID-CONTAININGPIPING SYSTEMS

COMPONENTS INCLUDED: PIPE, TUBING, FITTINGS,FLANGES, GASKETS, BOLTINGS.

AND DEVICES (SPECIAL COMPENTS) SUCH AS EXPENSIONJOINTS, FLEXIBLE JOINTS, PRESSURE HOSES, TRAPS,STRAINERS, INLINE PORTIONS OF INSTRUMENTS AND

SEPERATORS. .

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1.DESIGN PRESSURE :

THE DESIGN OF PRESSURE OF EACH COMPONENT IN APIPING SYSTEM SHALL BE NOT LASS THAN THE PRESSUREAT THE MOST SEVERE CONDITION OF COINCIDENT

INTERNAL OR EXTERNAL PRESSURE AND TEMPERATURE(MINIMUM OR MAXIMUM) EXPECTED DURING SERVICE.

THE MOST SEVERE CONDITION IS THAT WHICH RESULTSIN THE GREATEST REQUIRED COMPONENTS (PIPE) ANDTHE HIGHEST COMPONENT RATING.

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1.PIPE:

2.FITTINGS:

3.FLANGES, GASKETS, BOLTS

4.VALVES

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PIPE : A PRESSURE-TIGHT CYLINDER USED TO CONVEY AFLUID TO TRANSMIT A FLUID PRESSURE, ORDINARYILYDESIGNATED PIPE IN APPLICABLE MATERIAL.

PIPE IS CLASSIFIED ACCORDANCE WITH THE PRESSURE-

TEMPERATURE SYSTEM FOR CLASSIFYING FLANGES.

TABLE 1: PIPING CLASS RATINGS

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PRESSURE-TEMPERATURE RATINGS ARE MAXIMUMALLOWABLE WORKING GAGE PRESSURES IN BAR UNIT ATTHE TEMPERATURE IN DEGREES CELSIUS .

FOR INTERMEDIATE TEMPERATURE, LINEAR

INTERPOLATION IS PERMITTED. INTERPOLATIONBETWEEN CLASS DESIGNATIONS IS NOT PERMITTED. PRESSURE-TEMPERATURE RATINGS APPLY TO FLANGED

JOINTS THAT CONFORM TO THE LIMITATION ON BOLTINGIN PARA 5.3 AND ON GASKETS IN PARA 5.4, WHICH AREMADE UP IN ACCORDANCE WITH GOOD PRACTICE FORALIGNMENT AND ASSEMBLY (PARA 2.2).

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FOR ANY TEMPERATURE BELOW -29OC (-20OF), THE RATINGSHALL BE NO GREATER THAN THE RATING SHOWN FOR -29OC (-20OF).

PRESSURE RATINGS DESIGNATION

CLASS, FOLLOWED BY A DIMENSIONLESS NUMBER, IS THEDESIGNATION FOR PRESSURE-TEMPERATURE RATINGS ASFOLLOW:

CLASS 150 300 400 600 900 1500 2500

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1 bar = 1x105 Pa (N/m2) = 0.1 N/mm2 =10,197 kp/m2 = 10.20 m H2O = 0.98692 atm =14.5038 psi (lbf/in

2)

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