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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Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part a774 the standard.
Link to Active This link will always route to the current Active version of the standard. Fittings are pickled and passivated as per ASTM A to maintain corrosion resistance and to prevent surface discoloration from free iron oxidation.
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. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other.
Active view current version of standard. As-welded pipe is commonly used when no mechanical testing of the finished product is required. The values stated in each system are ashm exact equivalents; therefore, each system must be used independently of the other.
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.
Douglas Barwick – Specifications
Within the text, the SI units are shown in brackets. Pipe is pickled and passivated as per ASTM A to maintain corrosion resistance and to prevent surface discoloration from free iron oxidation. Wall thickness may not be more than. Wall thickness may not be more than Combining values from the two systems may result in non-conformance with the standard.
Combining values from the two systems may result in nonconformance with the specification. Class WP-S fittings are those manufactured from seamless product by a seamless method of manufacture marked with class symbol WP-S.
Link to Active This link will always route to the current Active version of the standard. 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, nickel, molybdenum, titanium, columbium, tantalum, and nitrogen.
However, unless the order specifies the applicable “M” specification designation SI unitsthe material shall be furnished to inch-pound units. Base metal analysis are traceable to the original mill certificates.
The principal manufacturing procedures specified under A are: As-Welded fittings are usually used where corrosion resistance is essential. Reducers are supplied as conical. Hydrostatic of each tube. Users atm note that certain corrosive conditions may restrict the use of one or more grades. All material is furnished in the heat treated condition and bead rolling is excluded in our process.
A product analysis of both the weld metal and base metal after annealing. Fittings differing from these standard may be furnished in accordance with Supplementary Requirement S9. Hydrostatic or non-destructive electric test of each tube.
A pipe and tubing is commonly used in the Pulp and Paper mills, astj processing plants, and other industries where corrosion resistance is essential.
Specially items can be ordered A pipe with immediately deliver available from a complete inventory standard sizes up to 24″. How to Find Us. Automatic welding process with the addition of filler wire.
These supplementary requirements call for additional tests. Tension, Reverse, forward-bend and hardness tests of each lot. With no nondestructive testing required. Pipe or fitting fabrications made with filler metal have been radiographed marked with Class symbol WP-W. Fittings are normally furnished in MSS SP dimensions, with square cut aetm, fittings with beveled ends can be provided.
Wall thickness may nor be mode than. Automatic welding process with or without addition of filler wire. This specification covers two general classes, WP and CR, of wrought austenitic stainless steel fittings of seamless and welded construction covered by the latest revision of ANSI B Although no restrictions are made on sizes commercial practice is usually above NPS8.
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. Class WP fittings are subdivided into four asttm 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.
No nondestructive testing is performed and the fittings are unannealed. Normally furnished in square cut ends, pipe with beveled ends can be provided. ASTM a74 not give any warranty express or implied or make any representation that the contents of this ast are accurate, complete or up to date. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. ASTM A This specification covers seamless and welded austenitic stainless steel tubing intended for the low or high temperature and general corrosion service.
Table 1 and Table 2 list the common diameters and nominal thicknesses of fittings in this specification. 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.
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.
Users should note that certain corrosive conditions may restrict the use of one or more grades.