STANDARD SPECIFICATION FOR FORGINGS, CARBON STEEL, FOR PIPING COMPONENTS
|Publication Date:||28 June 1985|
|ICS Code (Iron and steel forgings):||77.140.85|
This specification2 covers forged carbon steel piping components for ambient- and higher-temperature service in pressure systems. Included are flanges, fittings, valves, and similar parts to specified dimensions or to dimensional standards such as those ANSI and API specifications that are referenced in Section 2. Forgings made to this specification are limited to a maximum weight of 10 000 Ib [4540 kg]. Larger forgings may be ordered to Specification A266. Tube-sheets and hollow cylindrical forgings for pressure vessel shells are not included within the scope of this specification. Although this specification covers some piping components machined from rolled bar and seamless tubular products, (see 4.4) it does not cover raw material produced in these product forms.
Supplementary requirements are provided for use when additional testing or inspection is desired. These shall apply only when specified individually by the purchaser in the order.
Specifications covering other steel forgings are listed in 2.2; those for steel bars in 2.1.
This specification is expressed in both inch-pound units and SI units. However, unless the order specifies the applicable "M" specification designation (SI units), the material shall be furnished to inch-pound units.
The values stated in either inch-pound units or SI 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 specification.
NOTE 1-The dimensionless designator NPS (nominal pipe size) has been substituted in this standard for such traditional terms as "nominal diameter," "size," and "nominal size."
2 For ASME Boiler and Pressure Vessel Code applications see related Specification SA-105 in Section II of that Code.