ASTM A815/A815M-23 pdf free download – Standard Specification For Wrought Ferritic, Ferritic/Austenitic, And Martensitic Stainless Steel Piping Fittings.
This specification ASTM A815/A815M-23 covers two general classes, WP and CR, of wrought ferritic, ferritic/austenitic, and martensitic stainless steel fittings of seamless and welded construction covered by the latest revision of Specification A960/A960M. Fittings differing from these standards may be furnished in accordance with Supplementary Requirement S58 of Specification A960/A960M.
1.1.1 Class WP fittings are subdivided into four subclasses: Classes WP-S, WP-W, WP-WX, and WP-WU. They are manufactured to the requirements of Specification A960/A960M, and they shall have pressure ratings compatible with 13.2. Class WP-S fittings are those manufactured from seamless product by a seamless method of manufacture (marked with class symbol WP-S); Class WP-W fittings are those which contain welds where the fitting fabrication or construction welds have been radiographed (marked with class symbol WP-W); and Class WP-WX fittings are those which contain welds where all welds have been radiographed (marked with class symbol WP-WX); and Class WP-WU fittings are those which contain welds where all welds have been ultrasonically tested (marked with class symbol WP-WU).
1.1.2 Class CR fittings are those manufactured to the requirements of MSS SP-43, and they shall have pressure ratings compatible with 13.3.
1.2 This specification does not apply to cast fittings.
1.3 Optional supplementary requirements are provided. When desired, one or more of these may be specified in the order.
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.
4.Materials
4.1 The material for fittings shall consist of forgings，bars,plates, or seamless or welded tubular products that conform tothe chemical requirements in Table 1.
4.2 The steel shall be melted by one of the followingprocesses:
4.2.1 Electric furnace (with separate degassing and refiningoptional),
4.2.2 Vacuum furnace,or
4.2.3 Electric furnace followed by vacuum or electroslag-consumable remelting.
4.3 If secondary melting is employed,the heat shall bedefined as all ingots remelted from a primary heat.
5.Manufacture
5.1 Forming—Forging or shaping operations may be per-formed by hammering, pressing, piercing, extruding, upsetting,rolling, bending, fusion welding, machining or by combinationof two or more of these operations.The forming procedureshall be so applied that it will not produce surface discontinui-ties deeper than 5 % of the specified nominal thickness of thefitting.
