... pressure liquid delivery, such as water, gas, and oil; construction and piling Standard: API 5L, API 5CT, ASTM A252 ... :API 5L: GR B, X42,X46, X56, X60,X65,X70ASTM A252 GR 1, GR 2, GR 3ASTM A53: GR A, GR B, GR CBS 4360: ... ’s requirementTest:Chemical Component Analysis, Mechanical Properties (Ultimate tensile strength, Yield strength, Elongation), Technical Properties (Flattening Test, Bending Test, ...