The term used for the manufacturing is called “wrought” which means it is worked as opposed to being cast or forged.Īs to the W standing for weldable, I’m not sure that is correct since that are many, many pipe fittings that are weldable but carry designations other than a W. In very large sizes, the fittings may be manufactured in pieces and welded together as is the case for many large fittings. The fittings in question are manufactured in the same manner as the companion pipe for this specification. It is simply an identifier developed by ASTM. The WPB is not short hand for any process. What is the manufacturing process of ASTM A234 WPB pipe fittings? Steel elbow is used to be installed between two lengths of pipe or tube allowing a change of direction,usually these carbon steel elbows distinguished by connection ends, The ends may be machined for butt welding, threaded, or socketed, so the carbon steel elbows are consist of butt weld,thread elbow socket elbow and other series.the material is selected according to the application use such as high temperature use,sanitary fitting,regular industrial use etc. Where the wall thickness lies between two values above, the min elongation value is determined by the following equations: (0.2% offset or 0.5% extension-under-load) Mechanical properties of ASTM A234 Tensile Requirements
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The sum of Cu, Ni, Cr, and Mo shall not exceed 1.00%.For each reduction of 0.01% below the specified C maximum, an increase of 0.06% Mn above the specified maximum will be permitted, up to a maximum of 1.35%.GENERAL NOTE: All values are maximum unless otherwise indicated.Ĭhemical Composition (%) of ASTM A234 Grade Combining values from the two systems may result in nonconformance with the specification.ģ6” x 26” STD SMLS/WLD BW ECCENTRIC REDUCER The values stated in each system are not exact equivalents therefore, each system must be used independently of the other. Within the text, the SI units are shown in brackets. However, unless the order specifies the applicable “M” specification designation (SI units), the material shall be furnished to inch-pound units.ġ.5 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Cast steel welding fittings are governed by Specifications A 216/A 216M and A 217/A 217M.ġ.4 This specification is expressed in both inch-pound units and in SI units.
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When desired, one or more of these supplementary requirements may be specified in the order.ġ.3 This specification does not cover cast welding fittings or fittings machined from castings. Fittings differing from these ASME and MSS Standards shall be furnished in accordance with Supplementary Requirement S58 of Specification A 960/A 960M.ġ.2 Optional supplementary requirements are provided for fittings where a greater degree of examination is desired. These fittings are for use in pressure piping and in pressure vessel fabrication for service at moderate and elevated temperatures.
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1.1 This specification covers wrought carbon steel and alloy steel fittings of seamless and welded construction covered by the latest revision of ASME B16.9, B16.11, MSS-SP-79, MSS-SP-83, and MSS-SP-95.