Chrome Moly Alloy Buttweld Fittings

WP91, WP22, WP5, WP11, WP9 ( ASTM A234 & ASME SA234 ) - Buttweld Fittings

U.S. Metals is a premier worldwide supplier for all your Chrome Moly Alloy A234 / SA234 Buttweld Fittings needs.

Our Chrome Alloy Buttweld Fittings 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 
    Seamless Grade
    Welded Grade
    Classes
    Buttweld Fitting
    1 1/4 Chrome 
    WP11
    WP11W
    1, 2 and 3
    A234 / SA234
    2 1/4 Chrome 
    WP22
    WP22W
    1 and 3
    A234 / SA234
    5 Chrome 
    WP5
    WP5W
    1 and 3
    A234 / SA234
    9 Chrome 
    WP9
    WP9W
    1 and 3
    A234 / SA234
    P91
    WP91
    WP91W
    ----
    A234 / SA234
    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.
  • This specification covers 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.

    Fittings differing from these ASME and MSS standards shall be furnished in accordance with Supplementary Requirement S58 of Specification A960/A960M.
It is the purchaser's responsibility to specify in the purchase order all ordering information necessary to purchase the needed material. Examples of such information include but are not limited to the following:

  • Quantity
  • Description of fitting and nominal dimensions (standard or special)
  • Steel composition by grade and class designation
  • Construction, seamless or welded (unless seamless or welded construction is specified by the purchaser, either may be furnished at the option of the supplier)
  • Specification number (including the year/date of issue)
  • Choice of testing track from the options listed in Test Methods A1058 when material is ordered to an M suffix (SI units) product standard. If the choice of test track is not specified in the order, then the default ASTM track shall be used as noted in Test Methods A1058.
  • Supplementary requirements, and
  • Additional 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.