These regulations cover both hot finished and cold drawn
seamless pipes of ferritic alloy steel grades.
These shall conform in all respects with the
requirements herein specified.
The seamless pipes conforming to other
national/international standards which are known to be
commonly used as being suitable for high temperature service
can also be used with the designations of the
national/international standards, provided such materials are
not specifically prohibited by the regulations.
While making pipes to other national/international
standards the allowable stresses of the respective standard
shall be strictly followed while designing the tubes.
The design metal temperatures shall not exceed the
Temp. Degree C (Degree F)
P9, P11, P12, P22, P91, X20CrMoV121