Abstract： ASME B16.34:2020 pdf download.Valves -Flanged,Threaded, and Welding End. 1.2.4 QualIty Systems. Requirements relating to a valve manulacturer’s Quality System Program are described In Nonniandatory Appendix C. 1.2.5 ReLevant Units. This S...

ASME B16.34:2020 pdf download.Valves -Flanged,Threaded, and Welding End.

1.2.4 QualIty Systems. Requirements relating to a valve manulacturer’s Quality System Program are described In Nonniandatory

Appendix C.

1.2.5 ReLevant Units. This Standard slates values In both SI (Metric) and U.S. Customary units. These systems of units are to be

regarded separately as standard. Within the text, the U.S. Customary units are shown in parentheses or In separate tables following the SI tables The values stated In each system are not exact equivalents; therefore, It is required that each system of units be

used Independently of the other. Combining values from the two systems constitutes nonconformance with the Standard.

1.3 Selection of Valve Types and Material Service Conditions

Criteria for selection of valve types and materials suit.ihle for p.arucular fluid service are not within the scope at this

Standard.

1.4 Convention

For dctermlning conformance with thks Standards the convention for fixing significant digits where limits (maximum and minimum

values) are specified shall be as defined In ASTM £29. This requires that an observed orcakulated valuc be rounded off tothc

nearest unit in the last nght.hand digit used for expressing the limit. Decimal values and tolerances do not imply a particular

method of measurement.

L5 Denotation

1.5.1 Preswre Rating Designation. Class followed by a dimensionless number is the designation for pressure- temperature ratings.

Standardized designations are as follows.

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