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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The fittings shall be formed by a 7a74 or cold process and shall be welded by a shielded welding process with or without the addition of filler metal. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

A product analysis of both the weld metal and base metal after annealing. Referenced Documents purchase separately The documents listed zstm are referenced within the subject standard but are not provided as part of the standard. These supplementary requirements call for additional tests. However, unless the order specifies the applicable “M” specification designation SI unitsthe material shall be furnished to inch-pound units.

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. 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.

Class WP-W fittings contain welds made with or without filler metal.

Douglas Barwick – Specifications

Link to Active This link will always route to the current Active version of the standard. Heat analysis astj product analysis shall be performed where in the steel fittings shall conform to the required chemical compositions of carbon, manganese, phosphorus, sulfur, silicon, chromium, nickel, molybdenum, titanium, columbium, tantalum, and nitrogen.

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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. Automatic welding process with asstm without addition of filler wire. Within the text, the SI units are shown in brackets. When desired, one or more of these may be specified in the order. Although no restrictions are made on sizes commercial practice is usually above NPS8.

ASTM A This specification covers seamless and welded austenitic stainless steel tubing intended for the low or high temperature and general corrosion service. The principal manufacturing procedures specified under A are: 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 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. Fittings can be supplied in a wide range of diameters and wall thicknesses.

Users should note that certain corrosive conditions may restrict the use of one or more grades. The A manufacturing process is suited to high-volume production and is generally limited to the diameters and schedule wall z774 shown in ANSI B This process of welding allows the company to supply a large range of thickness and diameters.

Link to Active This link will always route to the current Active version of the standard. Wall thickness may not be more than All material is furnished adtm the heat treated condition and bead rolling is excluded in our process.

Fittings are normally furnished in MSS SP dimensions, with square cut ends, fittings with beveled ends can be provided. Tension, Reverse, forward-bend and hardness tests of each lot. Combining values from the two systems may result in non-conformance with the standard. Normally furnished in square cut ends, pipe with beveled ends can be provided.

Hydrostatic or non-destructive electric test of each tube. The term “fittings” applies to butt and socket welding parts such as 45 and 90 elbows, tees, reducers, wyes, laterals, crosses, and stub ends. These supplementary requirements call for additional tests.

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ASTM A Fittings This specification covers welded unannealed stainless fittings intended asfm low to moderate temperatures and corrosion service where heat treatment is not required for corrosion resistance.

Tension, Flattening, Flange test, reverse-bend and hardness tests required z774 lot. Within the a774, the SI units are shown in brackets.

With no nondestructive testing required. As-welded pipe is commonly used when no mechanical testing of the finished product is required. Pipe is pickled and passivated as per ASTM A to maintain corrosion resistance and to prevent surface discoloration from free iron oxidation.

Special fittings can be supplied to customer design aatm size when required. Class WP-S fittings are those manufactured from seamless product by a seamless method of manufacture marked with class symbol WP-S. Normally furnished in square cut ends, fittings with beveled ends can be provided. How to Find Us. As-Welded fittings are usually used where corrosion resistance is essential.

ASTM A774/A774M – 14

This specification covers five grades of as-welded, wrought austenitic stainless steel fittings for low-pressure piping and for low and moderate temperatures and general corrosive service.

Base metal analysis are traceable to the original mill certificates. A is considered to be the most applicable specification for “as welded” fittings. The values stated in each system may asrm be exact equivalents; therefore, each system shall be used independently of the other.

Table 1 and Table 2 list the common diameters atm nominal thicknesses of fittings in this specification. Hydrostatic of each tube. Reducers are supplied as conical. When desired, one or more of these may be specified in the order. A747 are pickled and passivated as per ASTM A to maintain corrosion resistance and to prevent surface discoloration from free iron oxidation.