Stainless Steel Flanges

F347, F347H, F321, F321H, F317L, F316, F316H, F316L, F304, F304H, F04L
( ASTM A182 & ASME SA182 ) - Stainless Steel Flanges

U.S. Metals is a premier worldwide supplier for all your Stainless Steel Flanges A182 / SA182 needs.

Our Stainless Steel Flange inventory is unsurpassed and is considered one of the most extensive stainless steel 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 stainless steel 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
    UNS #
    Flanges
    304
    F304
    S30400
    A182 / SA182
    304L
    F304L
    S30403
    A182 / SA182
    304H
    F304H
    S30409
    A182 / SA182
     
    316
    F316
    S31600
    A182 / SA182
    316L
    F316L
    S31603
    A182 / SA182
    316H
    F316H
    S31609
    A182 / SA182
     
    321
    F321
    S32100
    A182 / SA182
    321H
    F321H
    S32109
    A182 / SA182
     
    347
    F347
    S34700
    A182 / SA182
    347H
    F347H
    S34709
    A182 / SA182
     
    317L
    F317L
    S31703
    A182 / SA182
  • This specification covers forged stainless steel flanges for use in pressure systems manufactured to specified dimensions or to industry standard dimensional specifications. 

    For bars and products machined directly from bar refer to Specifications A/SA479/A/SA479M for the similar grades available in this specification. Products made to this specification are limited to a maximum weight of 10 000 lb [4540 kg]. For larger products and products for other applications, refer to Specification A/SA965/A/SA965M for the similar austenitic grades available in this specification.

    Supplementary requirements are provided for use when additional testing or inspection is desired. These shall apply when specified individually by the purchaser in the order.
    It is the purchaser's responsibility to specify in the purchase order all ordering information necessary to purchase the needed material. In addition to the ordering information guidelines in Specifications A/SA961 / A/SA961M, orders should include the following information:
  • Additional requirements, and
  • Description of flange and nominal dimensions (standard or special)
  • Requirement, if any, that manufacturer shall submit drawings for approval showing the shape of the rough forging before machining and the exact location of test specimen material.
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.