ASTM A774 PDF
October 29, 2019 | by admin
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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Active view current version of standard. Automatic welding process with or without addition of filler wire. All material is furnished in the heat treated condition and bead rolling is excluded in our process. This abstract is a brief summary of the referenced standard. Wall thickness may not be more than. The fittings shall be made from flat-rolled steel which shall be in the solution annealed condition.
However, unless the order specifies the applicable “M” specification designation SI unitsthe material shall be furnished to inch-pound units. 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.
As-welded pipe is commonly used when no mechanical testing of the finished product is required. The steel materials shall also undergo mechanical tests and shall conform to the required values of tensile strength, yield strength, elongation, and hardness.
Normally furnished in square cut ends, pipe with beveled ends can be provided. Combining values from the two systems may result in nonconformance with the specification.
Within the text, the SI units are shown in brackets. Wall thickness may nor be mode than. Base metal analysis are traceable to the original mill certificates. This specification covers two general classes, WP and CR, of wrought austenitic stainless steel fittings of seamless and welded construction covered by the latest satm of ANSI B These supplementary requirements call for additional tests. A product analysis of both the weld metal and base metal after annealing.
The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other.
Douglas Barwick – Specifications
No nondestructive testing is performed and the fittings are unannealed. Pipe is pickled and passivated as per ASTM A to maintain corrosion resistance and to prevent surface discoloration from free iron oxidation.
Automatic welding process with no addition of filler wire. 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 Automatic welding process with the addition of filler wire. This process of welding allows the company to supply a large range of thickness and diameters. The principal manufacturing procedures specified under A are: Fittings can be supplied in a wide range of diameters and wall thicknesses.
Specially items can be ordered A pipe with immediately deliver available from a complete inventory standard sizes up to 24″. 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.
Fittings are pickled and passivated as per ASTM A to maintain corrosion resistance and to prevent surface discoloration from free iron oxidation.
ASTM A774/A774M – 14
With no nondestructive testing required. A fittings is commonly use in the Pulp and Paper mills, food processing plants, and other industries where corrosion resistance is essential.
Hydrostatic or non-destructive electric test of each tube. Tension, Flattening, Flange test, reverse-bend and hardness tests required each lot. As-Welded awtm are usually used where corrosion resistance is essential. How to Find Us.
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided zstm part of the standard. A is considered to be the most applicable specification for “as welded” fittings.
Combining values from the two systems may result in non-conformance with the standard. This specification covers five grades of as-welded, wrought austenitic stainless steel fittings for low-pressure piping and for z774 and moderate temperatures and general corrosive service. 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.
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.
Within the text, the SI units are shown axtm brackets.