What does wp mean in a403 cr
This specification covers the standard for wrought austenitic stainless steel fittings for pressure piping applications. The material for fittings shall consist of forgings, bars, plates, or seamless or welded tubular products. Forging or shaping operations shall be performed by hammering, pressing, piercing, extruding, upsetting, rolling, bending, fusion welding, machining, or by a combination of two or more of these operations. All fittings shall undergo heat treatment. Chemical and product analyzes shall be performed and shall conform to the required chemical composition in carbon, manganese, phosphorus, sulfur, silicon, chromium, molybdenum, and titanium. Tension test shall be done on the fitting material to determine the tensile properties such as yield strength and tensile strength. Fittings supplied under this specification shall be examined visually for surface discontinuities, surface checks, and mechanical marks.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
1.1 This 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 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 A351 / A351M, A743 / A743M, and A744 / A744M.
1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents(purchase separately)The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A351 / A351M Specification for Castings, Austenitic, for Pressure-Containing Parts
A743 / A743M Specification for Castings, Iron-Chromium, Iron-Chromium-Nickel, Corrosion Resistant, for General Application
A744 / A744M Specification for Castings, Iron-Chromium-Nickel, Corrosion Resistant, for Severe Service
A751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products
A960 / A960M Specification for Common Requirements for Wrought Steel Piping Fittings
E112 Test Methods for Determining Average Grain Size
E165 / E165M Practice for Liquid Penetrant Testing for General Industry
ASME standardsASME B16.9 Factory-Made Wrought Steel Butt-Welding Fittings
ICS Number Code 23.040.40 (Metal fittings)
UNSPSC Code 40170000 (Pipe piping and pipe fittings)
Referencing This Standard
DOI: 10.1520 / A0403_A0403M-20
ASTM A403 / A403M-20, Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings, ASTM International, West Conshohocken, PA, 2020, www.astm.orgBack to top
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