ASTM A403-09 Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings
ASTM International / 01-Oct-2009 / 8 pages ASTM A403-09 pdf
1.1 This ASTM A403-09 specification covers wrought stainless steel fittings for pressure piping applications.
1.2 Several grades of austenitic stainless steel alloys are included in this specification Grades are designated with a prefix, WP or CR, based on the applicable ASME or MSS dimensional and rating standards, respectively.
1.3 For each of the WP stainless grades, several classes of fittings are covered, to indicate whether seamless or welded construction was utilized. Class designations are also utilized to indicate the nondestructive test method and extent of nondestructive examination (NDE). Table 1 is a general summary of the fitting classes applicable to all WP grades of stainless steel covered by this specification. There are no classes for the CR grades. Specific requirements are covered elsewhere.
1.4 This ASTM A403-09 specification is expressed in both inch-pound units and in SI units. However, unless the order specifies the applicable “M” specification designation (SI units), the material shall be furnished to inch-pound units.
1.5 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 may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
1.6 This specification does not apply to cast steel fittings. Austenitic stainless steel castings are covered in Specifications ASTM A351/A351M,ASTM A743/A743M, and ASTM A744/A744M.
Keywords ASTM A403-09: austenitic stainless steel; corrosive service applications; pipe fittings; steel; piping applications; pressure containing parts; stainless steel fittings; Austenitic stainless steel pipe–specifications; Stainless steel fittings–specifications; Stainless steel pipe–specifications; Steel fittings–specifications; Wrought steel fittings–specifications ; ICS Number Code 23.040.40 (Metal fittings)