A312/A312M Standard Specification for Seamless and
Pipe having other dimensions may be furnished provided such pipe complies with all other requirements of this specification. 1.5 Grades TP321 and TP321H have lower strength requirements for pipe manufactured by the seamless process in nominal wall thicknesses greater than 3/8 in. [9.5 mm]. 1.6 The values stated in either inch-pound …