ASTM A53 pipe are carbon steel pipe as per ASTM specification, used for structural piping. The alloy specifications are specifically set by ASTM international, in specification ASTM A53/ A53M.
A 53/A 53M specification covers seamless and welded black and hot-dipped galvanized steel pipe of various grades from 1/8- to 26- with nominal wall thickness from 0.37mm to 227.37mm. ASTM A53 pipe is designed and intended for coiling, bending, flanging, mechanical and pressure applications and also for the low temperature and pressure conveyance of water, steam, natural gas, air and other liquids and gasses in plumbing and heating systems, air conditioning units, automatic sprinkler systems, and other related uses.
It is available in following types and Grades:
Type F-Furnace-butt welded, continuous welded Grade A
Type E-Electric-resistance welded, Grades A and B,
Type S-Seamless, Grades A and B.
The grade comprises different chemical and mechanical properties. Grade refers to divisions within different types of seamless and designates mechanical properties such as minimum yield and tensile strengths. ASTM A53 Grade B has higher tensile and yield strength than ASTM A53 Grade A. It is manufactured to higher carbon content steel. Grade A, being a softer steel, is easier to bend and is recommended for use in close coiling and cold bending. Grade B has higher stress values and is better suited for machining operations. ASTM A 106 GRADE C, which is available in ASTM A106, has higher tensile and yield strength than Grades ASTM A106 GRADE A & ASTM A106 GRADE B.