... composition, tensile property, and hardness requirements. Each length of pipe shall be subjected to the hydrostatic test. Also, ... shall be subjected to the limitations in the scope of the respective practices. The different mechanical test requirements ... Properties Grade P11, P22, P5, P9Grade P91Grade P92Tensile strength, min, (MPa)415585620Yield strength, min, (MPa)205415440Elongation, min, (%), L/T30 ...