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.
|Genre:||Health and Food|
|Published (Last):||6 May 2014|
|PDF File Size:||9.40 Mb|
|ePub File Size:||17.88 Mb|
|Price:||Free* [*Free Regsitration 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 process of welding allows the company to supply a large range of thickness and diameters. Fittings are pickled and passivated as per ASTM A to maintain corrosion resistance and to prevent surface discoloration from free iron oxidation. 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.
Carbide solution heat treatment is required which include rapid cooling to prevent re-precipitation of carbides.
Special fittings can be supplied to customer design and size when required. As-Welded fittings are usually used where corrosion resistance is essential. Specially items can be ordered A pipe with immediately deliver available from a complete inventory standard sizes up aatm 24″.
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. 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 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 fittings is commonly use in the Pulp and Paper mills, food processing plants, and other industries where corrosion resistance is essential. The fittings shall be made from flat-rolled steel which shall be in the solution annealed condition.
When desired, one or more of these may be specified in the order. Class WP fittings are subdivided into four subclasses: Normally furnished in square cut ends, pipe with beveled ends can be provided.
Tension, Flattening, Flange test, asrm and hardness tests required each lot.
Douglas Barwick – Specifications
Automatic welding process with no addition of filler wire. Combining values from the two systems may result in non-conformance with the standard. Hydrostatic or non-destructive electric test of each a74. No nondestructive testing is performed and the fittings are unannealed. It w774 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.
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 Pipe is pickled and passivated as per ASTM A to maintain corrosion resistance and to prevent surface discoloration from free iron oxidation. When desired, one or more of these may be specified in the order. Wall thickness may not be more than As-welded pipe is commonly used when no mechanical testing of the finished product is required.
The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other.
Reducers are supplied as conical. 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. Active view current version of standard. 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.
Automatic welding process with or without addition of filler wire. The term “fittings” applies to butt and socket welding parts such as 45 and 90 elbows, tees, reducers, wyes, laterals, crosses, aa774 stub ends.
Wall thickness may not be more than.
Fittings can be supplied in a wide range of diameters and wall thicknesses. Link to Active This link will always route to the current Active version of the standard.
ASTM A774/A774M – 14
Welded a7774 can be supplied as smooth flow or mitered construction, tees, lateral and crosses are supplied as nozzle-welded. ASTM A This specification covers seamless and welded austenitic stainless steel tubing intended a747 the low or high temperature and general corrosion service. Automatic welding process with the addition of filler wire. 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.
These supplementary requirements call for additional tests. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
Pipe or fitting fabrications made with filler metal have been radiographed marked with Class symbol WP-W. Combining values from the two systems may result in nonconformance with the specification. A is considered to a747 the most applicable specification for “as welded” fittings.
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. Within the text, the SI units are shown in brackets. 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.
A pipe and tubing is commonly used in the Pulp and Paper mills, food processing plants, and other industries where corrosion resistance is essential. Within the text, the SI units are shown in brackets. Users should note that certain corrosive conditions may restrict the use of one or more grades.