AWS B2.2-B2.2M:2016 pdf download.Specification for Brazing Procedure and Performance Qualification
1.1 Scope. This specification provides the requirements for qualification of Brazing Procedure Specificeations (BPSs).This specification also provides requirements for the performance qualification of brazers and brazing operators. This specification is intended for use where referenced by a product standard or contract document.Employers shall be responsible for the brazing done by their organization, including the use of qualified brazing proce-dures, qualified brazers, and qualified brazing operators. It is the Employer s responsibility to assure that BPS meet any additional requirements of the Referencing Document. Each Employer shall maintain the applicable BPSs, Brazing Pro-cedure Qualification Records (BPQRs), and Brazing Performance Qualification (BPQ)s during the period of their use.
When not otherwise specified by the Referencing Document, the edition of this specification to be used shall be estab-lished in accordance with the following: (1) editions may be used at any time after the effctive date of issue; (2) the latest edition of this document should be used for new contracts; (3) editions established by contract date may be used during the entire term of the contract, or the provisions of later editions may be used when agreed upon by the contract-ing parties.
1.1.1 Base Metals. The grouping of base metals by Base Metal Number (BM No.) in Table B.I has been made on the basis of metallurgical compatibility, chemical composition, and brazeability to decrease the number of required brazing qualifications. The grouping does not imply that base metals may be indiscriminately substituted within the same BM No. without consideration of their applicability. For some materials or combinations of materials, additional tests may be required by the procuring activity, the Referencing Document, or the design engineer.Base metals are identified by their Americean Society for Testing and Materials (ASTM), American Bureau of Shipping (ABS), or Unified Numbering System (UNS) designations. Cross reference specifications, listed in the UNS for Metals and Alloys opposite a given UNS No., are included in the same BM No. group as the given UNS No. An American Society of Mechanical Engineers (ASME) designation, is included in the same BM No. group.
1.1.2 Filler Metals. The grouping of fller metals by Filler Metal Number (FM No.) in Table C.I has been made on the basis of chemical composition to decrease the number of required brazing qualifications. The grouping does not imply that filler metals may be indiscriminately substituted within the same FM No. without consideration of their appli-cability. AWS A5.8M/A5.8, Specification for Filler Metals for Brazing and Braze Welding, provides detailed require-ments and general applicability of filler metals.AWS B2.2-B2.2M pdf download.