Chrome Moly Pipe has become a standard in the power generation
industry and the petrochemical industry, not only because of its
tensile strength, corrosion resistance and high-temperature
strength, but also because of its cost-effectiveness. Grades ASTM
A335 P-11, P-22 – P-91 & P-92 are prevalent grades for the
power industry, while P-5 & P-9 are the grades utilized in
major refinery processing.
1/4” Nominal to 24”O.D. Seamless Pipe
Wall Thickness – Schedule 40 through XXH
Chrome Moly Pipe Specifications & Grades
SA335 & A335 – Grades P5, P9, P11, P22, P91, P92
A691 1-1/4 Chrome through 9 Chrome (Welded Alternative to A335)
Flanges & Fittings
Alloy Butt Weld Fittings: A/SA-234
WP-5, WP-9, WP-11 (Class 1 & 2), WP-22 (Class 1 & 3),
Alloy Forged Fittings & Flanges: A/SA-182
F-5, F-9, F-11 (Class 1 & 2), F-22 (Class 1 & 3), F-91,
This specification covers wrought carbon steel and alloy steel
fittings of seamless and welded construction covered by the latest
revision of ASME B16.9, B16.11, MSS-SP-79, MSS-SP-83, MSS-SP-95,
and MSS-SP-97. These fittings are for use in pressure piping and in
pressure vessel fabrication for service at moderate and elevated
temperatures. The M in the designation stands for metric.
The starting material for fittings shall be fully killed steel,
consisting of forgings, bars, plates, sheet, and seamless or
fusion-welded tubular products with filler metal added and shall
conform to the chemical requirements. Unless otherwise specified
for carbon steel plates and sheet, the steel may be made to either
coarse grain or fine grain practice. Grade WP9 shall be made to
fine grain practice.
NOTE 1: All requirements are maximum unless otherwise indicated.
NOTE 2: Where an ellipsis (...) appears in this table, there is no
requirement and analysis for the element need not be determined or