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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 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.

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Work Scope

This specification covers nominal wall and minimum wall seamless ferritic alloy-steel pipe intended for high-temperature service. Pipe ordered to this specification shall be suitable for bending, flanging (vanstoning), and similar forming operations, and for fusion welding. Selection will depend upon design, service conditions, mechanical properties, and high-temperature characteristics.

Review of Procurement Requirements:

It shall be the responsibility of the purchaser to specify all necessary requirements. Such requirements to be considered include, but are not limited to, the following:
•Quantity (feet, metres, or number of lengths)
•Name of material (seamless tubes)
•Grade
•Condition (hot finished or cold finished)
•Controlled structural characteristics
•Size (outside diameter and minimum wall thickness, unless average wall thickness is specified) ◾Length (specific or random)
◾Hydrostatic Test or Nondestructive Electric Test
◾Increased sulfur (for machinability)
◾Specification designation and year of issue
◾Special requirements and any supplementary requirements selected

Sizes

Materials in industry standard designations: STD, 40, XH, 60, 80, 100, 120, 140, 160, XXH
 Special customer designated nominal and minimum wall thicknesses can also be furnished.

Non standard OD & ID are available.
 1/4” Nominal to 24”O.D. Seamless Pipe

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), WP-91, WP-92

Alloy Forged Fittings & Flanges: A/SA-182
•F-5, F-9, F-11 (Class 1 & 2), F-22 (Class 1 & 3), F-91, F-92