ASTM A694 Standard Specification for Carbon and Alloy Steel Forgings for Pipe Flanges, Fittings,Valves, and Parts for High-Pressure Transmission Service

ASTM A694 Standard Specification for Carbon and Alloy Steel Forgings for Pipe Flanges, Fittings,Valves, and Parts for High-Pressure Transmission Service

ASTM A694 Standard Specification covers forged or rolled steel pipe flflanges, forged fifittings, valves, and parts suitable for use with high-strength transmission-service pipe. Included are flflanges, fifittings, and similar parts ordered either to dimensions specifified by the purchaser or to ASME or MSS dimensional standards referenced in Section 2. 

Several grades of material, based on minimum yield strength requirements, are covered, as indicated in Table 1. 

Supplementary Requirements are provided. Supplementary Requirement S 1 is provided for use when purchaser approval is required for repair welding. 

ASTM A694 Standard Specification is expressed in both inch-pound units and in SI units. However, unless the order specififies the applicable “M” specifification designation (SI units), the material shall be furnished to inch-pound units. 

The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.