

NPS 2 and larger shall be hot finished unless otherwise specified. Seamless pipe is formed from a cylindrical bar of steel that is heated to a very high temperature and then is pierced with a probe to create the hole.

NPS 1-1/2 and under may be either hot finished or cold drawn. Welded pipe is to be tested in the body, pipe weld and heat-affected zone. ASTM Specification A106 covers seamless carbon steel nominal wall pipe for high-temperature service, suitable for bending, flanging and similar forming operations. The wall thickness in SI units is rounded to one decimal place in accordance with the rounding method of Practice E29. Seamless pipe is to be tested in the body. Compared with welded stainless steel pipe, seamless pipe has a flat surface, uniform metallographic organization, and much higher corrosion resistance and.

Minimum Wall Thickness on Inspection for Nominal (average) Pipe Wall Thickness: Stainless Steel 304 Pipe is a metallic pipe made up of an austenitic stainless steel that has 18 chromium and 8 nickel in the composition.
