Abstract： ASME B16.33:2002 pdf download.MANUALLY OPERATED METALLIC GAS VALVES FORUSE IN GAS PIPING SYSTEMS UP TO 125 PSI. 1.4 Quality Systems Nonmandatarv requirements relating 10 the manufacturer’s Quality System Program are described in Noninunda...

ASME B16.33:2002 pdf download.MANUALLY OPERATED METALLIC GAS VALVES FORUSE IN GAS PIPING SYSTEMS UP TO 125 PSI.

1.4 Quality Systems

Nonmandatarv requirements relating 10 the manufacturer’s Quality System Program are described in Noninundatory Annex B.

1.5 Convention

Far the purpose of determining conformance with this Standard. thc convcntion for fixing signilicant digits where limits. maximum

or minimum values, are specitied shall he “rounding oIr as defined in ASPi,t Practice E 29. This requires that an observed or

calculated value shall be rounded oft to the nearest unit in the last right-hand digit used for expressing the limit, Decimal

values and tolerances do not imply a particular method of measurement.

1.6 Codes and Regulations

A valve used under the jutisdiction of the Code of Federal Regulation (CFR) such as Tide 49 Part 192. the ASME Code fat- Pressure

Piping such as ASMIi B3l.8. or the National Fuel Gas Code. Z223.l. is subject to any limitation of that code or regulation.

2 CONSTRUCTION

2.1 General

Each valve at the time of manufacture shall he capable of meeting the requirements set faith in this Standard, The woiInsanship

employed in the manufacture and assembly of each valve shall provide gas tightness, safely, and reliability of performance

and Freedom 1mm injurIous imperfections and defects.

2.2 Tamper-Proof Features

Wf vaives are specified to be tamper-proof. they shall be designed and constructed to minimize the possibility of the removal of

the core of the valve with other than specialized tools.

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