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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Referenced Documents purchase separately The documents listed below are referenced within the 7a74 standard but are not provided as part of the standard. When desired, one or more of these may be specified in the order. A is considered to be the most applicable specification for “as welded” fittings. ASTM A Fittings This specification covers welded unannealed stainless fittings intended qstm low to moderate temperatures and corrosion service where heat treatment is not required for corrosion resistance.

ASTM A774 Grade TP316L

Fittings are pickled and passivated as per ASTM A to maintain corrosion resistance and to prevent asym discoloration from free iron oxidation. Within the text, the SI units are shown in brackets. Link to Active This link will always route to the current Active version of the standard.

Automatic welding process with or without addition of filler wire. Base metal analysis are traceable to the original mill certificates.

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Douglas Barwick – Specifications

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. The steel materials shall also undergo mechanical tests and shall conform to the required values of tensile strength, yield strength, elongation, and hardness. Wall thickness may not be more than Carbide solution heat treatment is required which include rapid cooling to prevent re-precipitation of carbides.

Fittings are normally furnished in MSS SP dimensions, with square cut ends, fittings with beveled ends can be provided.

Hydrostatic or non-destructive electric test of each tube. Tension, Reverse, forward-bend and hardness tests of each lot.

As-welded pipe is commonly used when no mechanical testing of the finished product is required. Heat analysis and product analysis shall be performed where in the steel fittings shall conform to the required chemical compositions of carbon, manganese, phosphorus, sulfur, silicon, chromium, ast, molybdenum, titanium, columbium, tantalum, and nitrogen.

These supplementary requirements call for additional tests. Aetm product analysis of both the weld metal and base metal after annealing.

The A manufacturing process is suited to high-volume production and is generally limited to the diameters and schedule wall thickness shown in ANSI B Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

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Within the text, the SI units are shown in brackets.

Wall thickness may not be more than. 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 contain welds made with or without filler metal. Class WP-W fittings contain welds made with or without filler metal. The fittings shall be made from flat-rolled steel which shall be in the solution annealed condition.

Users should note that certain corrosive conditions may restrict the use of one or more grades. Automatic welding process with the addition of filler wire. Pipe or fitting fabrications made with filler metal have been radiographed marked with Class symbol WP-W. Pipe is pickled and passivated as per ASTM A to maintain corrosion resistance and to prevent surface discoloration from free iron oxidation.

The principal manufacturing procedures specified under A are: Welded elbows can be supplied as smooth flow or mitered construction, tees, lateral and crosses are supplied as nozzle-welded. Active view current version of standard. Class WP fittings are subdivided into four subclasses: The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other.