Formerly known as the American Society for Testing and Materials, ASTM International -- with more than 30,000 technical experts from 135 countries -- works voluntarily to provide standards for a wide range of products, materials, systems and services for the global manufacturing and trade industries. ASTM set standards for cold-drawn seamless pipe specifications to ensure that pipes used globally in power generation, heavy equipment, boilers, mining, agriculture, aircraft and aerospace industry meet uniform and standard specifications.
Specifications are set based upon the application of the piping. They'll generally follow ASTM or American Society of Mechanical Engineers (ASME) specifications. Individual specifications are listed under the standards of A106 for high-temperature applications, A179 for heat exchangers and condensers and A192 for steel boiler and superheater tubes. In applications such as these, wall thicknesses are set at anywhere from 1/8 inch to 8 inches, depending upon the application.
This category covers A333 seamless and welded carbon and alloy steel pipe for use at low temperatures; A334 seamless and welded carbon and alloy steel pipe, also for use at low temperatures; A335 seamless ferritic alloy-steel pipe for high-temperature service; A424 sheet steel in coils and cut lengths for porcelain enameling; and A519 double-wall, copper-brazed steel tubing suitable for general engineering uses. Wall thicknesses vary with application. Low-temperature applications have nominal or average wall thicknesses, according to ASTM International.
By Laurie J. Brenner,eHowContributor
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