ASTM A774 PDF

Purchase your copy of ASTM A/AM – 14 as a PDF download or hard copy directly from the official BSI Shop. All BSI British Standards. ASTM A – This specification covers “as-welded” stainless steel pipe fittings for low pressure piping intended for low to moderate temperatures and general. ASTM A/AM: STANDARD SPECIFICATION FOR AS-WELDED WROUGHT AUSTENITIC STAINLESS STEEL FITTINGS FOR GENERAL CORROSIVE.

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Normally furnished in square cut ends, asstm with beveled ends can be provided. Class WP-S fittings are those manufactured from seamless product by a seamless method of manufacture marked with class symbol WP-S. ASTM A This specification covers welded unannealed stainless pipe intended for low to moderate temperatures and corrosion service where heat treatment is not required for corrosion resistance.

Douglas Barwick – Specifications

Link to Active This atm will always route to the current Active version of the standard. How to Find Us. Within the text, the SI units are shown in brackets.

A is considered to be the most applicable specification for “as welded” pipe and differs from it only that a transverse guided bend test and a transverse tension test are required per lot. Table 1 and Table 2 list the common diameters and nominal thicknesses of fittings in this specification. Normally furnished in square cut ends, fittings with beveled ends can be provided.

Class WP fittings are subdivided into four subclasses: Pipe is pickled and passivated as per ASTM A to maintain corrosion resistance and to prevent surface discoloration from free iron oxidation. Combining values from the two systems may result in non-conformance with the standard. When desired, one or more of these may be specified in ashm order.

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These supplementary requirements call for additional tests. Automatic welding asmt with no addition of filler wire. Awtm WP-S fittings are those manufactured from aetm product by a seamless method of manufacture marked with class symbol WP-S ; Class WP-W fittings contain welds made with or without filler metal.

Hydrostatic of each tube. As-welded pipe is commonly used when no mechanical testing of the finished product is required. ASTM A Fittings This specification covers welded unannealed stainless fittings intended for low to moderate temperatures and corrosion service where heat treatment is not required for corrosion resistance. This abstract is a brief summary of the referenced standard. This specification covers two general classes, WP and CR, of wrought austenitic stainless steel ashm of seamless and welded construction covered by the latest revision of ANSI B Users should note that certain corrosive conditions may restrict the use of one or more grades.

The fittings shall be made from flat-rolled steel which shall be in the solution annealed condition. Combining values from the two systems may result in nonconformance with the specification.

With no nondestructive testing required. As-Welded fittings are usually used where corrosion resistance is essential. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Special fittings can be supplied to customer design and size when required.

Users should note that certain corrosive conditions may restrict the use of one or more grades. Wall thickness may not be more than The fittings shall be formed by a hot or cold process and shall be welded by a shielded welding process with or without the addition of filler metal. Base metal analysis are traceable to the original mill certificates. This process of welding allows the company to supply a large range of thickness and diameters.

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ASTM A774/A774M – 14

These supplementary requirements call for additional tests. The term “fittings” applies to butt and socket welding parts such as 45 and 90 elbows, tees, reducers, wyes, laterals, crosses, and stub ends.

Carbide solution heat treatment is required which include rapid cooling to prevent re-precipitation of carbides. Wall thickness may nor be mode than. Link to Active This link will always route to the current Active version of the standard. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

Although no restrictions are made on sizes commercial practice is usually above NPS8. Pipe or fitting fabrications made with filler metal have been radiographed marked with Class symbol WP-W. Fittings differing from these standard may be furnished in accordance with Supplementary Requirement S9.

Historical Version s – view previous versions of standard. Tension, Reverse, forward-bend and hardness tests of each lot. Within the text, the SI units are shown in brackets.