Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Low-Temperature Service (Includes all amendments and changes 10/29/2024).
NORM herausgegeben am 15.10.2024
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Designation standards: ASTM A420/A420M-24a
Publication date standards: 15.10.2024
The number of pages: 7
Approximate weight : 21 g (0.05 lbs)
Country: American technical standard
Kategorie: Technische Normen ASTM
This specification covers wrought carbon steel and alloy steel pipe fittings of seamless and welded construction for use in pressure piping and pressure vessel service at low temperatures. Materials shall consist of forgings, bars, plates, seamless or fusion welded tubular products with filler metal added, and shall be produced by open-hearth, basic-oxygen, or electric-furnace process. Forging or forming operations shall be performed by one or a combination of two or more of the following procedures: hammering, pressing, piercing, extruding, upsetting, working, bending, fusion-welding, or machining. All welding shall be completed prior to the austenitizing heat treatment, which shall be executed in the normalized, normalized and tempered, annealed, or quenched and tempered conditions. Steel specimens shall conform to required values of chemical composition, tensile strength, yield strength, elongation, wall thickness, and Charpy V-notch impact value. All fusion-welded butt joints shall undergo radiographic examination, while hydrostatic testing of fittings is not required in this specification. Repair welding shall be permissible for parts made to dimensional standards.
Keywords:
pipe fittings, piping applications, pressure containing parts, pressure vessel service, temperature service applications, low,, ICS Number Code 23.040.40 (Metal fittings)