Chrome Moly Alloy Welded Pipe

P91, P22, P5, P11, P9, P92 ( ASTM A691 & ASME SA691 ) - Alloy Welded Pipe

U.S. Metals is a premier worldwide supplier for all your Chrome Moly Alloy A691 / SA691 Welded Piping needs.

Our Chrome Alloy Welded Piping inventory is unsurpassed and is considered one of the most extensive chrome inventories in the world!

Turnarounds or outages, planned retrofits or emergency situations, grassroots projects worldwide; U.S. Metals has the experienced staff to assist you on all of your specialty alloy requirements, no matter how detailed the specification, no matter how difficult the situation.

New industry requirements, not an issue. We work closely with agencies like EPRI along with our utility and refining clients to be on the cutting edge of new industry requirements that affect your high energy/high temperature piping systems.

Our inventory is evolving to meet the new specifications that prevent current issues as creep cracking and hardness problems.



  • Trade Name 
    Grade
    Welded Pipe
    1 1/4 Chrome 
    1 1/4CR
    A691 / SA691
    2 1/4 Chrome 
    2 1/4CR
    A691 / SA691
    5 Chrome 
    5CR
    A691 / SA691
    9 Chrome 
    9CR
    A691 / SA691
    P91
    91
    A691 / SA691

    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.

    Pipe manufactured to this specification is normally furnished in outside diameters 16 inch and larger with wall thicknesses up to and including 3 inches.

    Pipe having other size and wall thickness dimensions are permitted provided all other requirements of this specification are met. Manufacturer's acceptance of special dimensions would have to be obtained prior to placement of an order.
  • This specification covers electric-fusion-welded alloy-steel pipe intended for high pressure at high-temperature service fabricated from pressure-quality plate.
The inquiry and order for material under this specification should include the following information:

  • Quantity (feet, metres, or number of lengths)
  • Name of material (steel pipe, electric-fusion-welded)
  • Specification number
  • Grade and class designation
  • Size (inside or outside diameter, nominal or minimum wall thickness)
  • Length (specific or random)
  • End finish
  • Purchase options
  • Supplementary requirements
Information provided in this page is in accordance with the 2013 Edition of the ANNUAL BOOK OF ASTM STANDARDS
Refer to ASME B & PV Code Section II for non-identical A/SA requirements.