Circular
welded non-alloy steel pipes of circular cross-section not more than
406.4 millimeters (16 inches) in outside diameter tubes are generally
known as standard steel pipes. Regardless of wall thickness, the surface
finish of standard pipes are black, galvanized, or painted and the end
finish is plain end, beveled end, threaded, or threaded and coupled.
Unfinished conduit pipe is also included in these orders. Standard pipe
is produced in Continuous Weld, Electric Resistance Weld, and Seamless.
These pipes are intended for the low pressure conveyance of water,
steam, natural gas, and other liquids and gases in plumbing and heating
systems, air conditioning units, automatic sprinkler systems, and other
related uses. Standard steel pipes and tubes may also be used for light
load-bearing applications, such as for fence tubing and as structural
pipe tubing used for framing and support members for reconstruction or
load-bearing purposes in the construction, shipbuilding, trucking, farm
equipment, and related industries.
