Fusion, Welding, Brazing, Soldering Specifications

PS-00300 Fusion Welding, Brazing and Soldering Specifications

1.0 SCOPE
This specification covers the requirements for fusion welding, brazing and soldering of aerospace ground support equipment parts and is applicable unless otherwise directed by the customer or contract.

2.0 APPLICABLE DOCUMENTS
The following publications shall be applicable to the extent specified herein, or as defined on the contract or purchase order. These publications shall be in effect as of the issues listed. Compliance with any other issues of these publications requires prior written approval from ITW Military GSE. Insofar as any of the publications referred to herein conflict with the requirements of this specification, this specification shall govern.

2.1 Other Government Documents, Drawings and Publications
The following other government documents, drawings and publications form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract.

2.1.1 Non Government publication
The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract.
AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA, INC (AIA)

Copies of these documents are available from Aerospace Industries Association, 1000 Wilson Boulevard, Suite 1700, Arlington, Virginia 22209-3901, U.S.A. or online at http://aia-aerospace.org.
AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM)
Copies of these documents are available from ASTM International, 100 Barr Harbor Drive. West Conshohocken, Pennsylvania 19428-2959, U.S.A., or online at http://www.astm.org.

  • ASTM-B600 Standard Guide for Descaling and Cleaning Titanium and Titanium Alloy Surfaces
  • ASTM-E1417 Standard Practice for Liquid Penetrant Examination
  • ASTM-E1444 Standard Practice for Magnetic Particle Examination
  • ASTM-E1742 Standard Practice for Radiographic Examination

AMERICAN WELDING SOCIETY (AWS)
Copies of these documents are available from American Welding Society, 550 N.W. LeJeune Road, Miami, Florida 33126, U.S.A., or online athttp://www.aws.org.

  • AWS-B2.2 Standards for Brazing Procedure and Performance Qualification
  • AWS-A2.4 Standard Symbols for Welding, Brazing and Nondestructive Examination
  • AWS-A3.0 Standard Welding Terms and Definitions Including Terms for Adhesive Bonding, Brazing, Soldering, Thermal Cutting, and Thermal Spraying.
  • AWS-C3.4 Specifications for Torch Brazing
  • AWS- A5.01 Filler Metal Procurement Guidelines
  • AWS-B2.1 Specifications for Welding Procedure and Performance Qualifications
  • AWS-D17.1 Specifications for Fusion Welding for Aerospace Applications

COMPRESSED GAS ASSOCIATION (CGA)
Copies of these documents are available from Compressed Gas Association, 4221 Walney Road, 5th Floor, Chantilly, Virginia 20151-2923, U.S.A. or online at http://www.cganet.com.

  • CGA-G1.1 Commodity Specification for Acetylene
  • CGA-G4.3 Commodity Specification for Oxygen
  • CGA-G5.3 Commodity Specification for Hydrogen
  • CGA-G6.2 Commodity Specification for Carbon Dioxide
  • CGA-G9.1 Commodity Specification for Helium
  • CGA-G10.1 Commodity Specification for Nitrogen
  • CGA-G11.1 Commodity Specification for Argon

SOCIETY OF AUTOMOTIVE ENGINEERS (SAE)
Copies of these documents are available from SAE International, 400 Commonwealth Drive, Warrendale, Pennsylvania, 15096-0001, U.S.A. or online at http://www.sae.org.

  • SAE-AMS2816 Identification Welding Wire, Tab Marking Method
  • SAE-AMS-STD-2154 Inspection, Ultrasonic, Wrought Metals, Process

IPC ASSOCIATION CONNECTING ELECTRONIC INDUSTRIES
Copies of these documents are available from IPC, 3000 Lakeside Drive, Suite 309S, Bannockburn, Illinois 60015-1219, U.S.A. or online athttp://www.ipc.org.

  • IPC J-STD-001D Requirements for Soldered Electrical and Electronic Assemblies
  • IPC/WHMA-A-620 Requirements and Acceptance for Cable and Wire Harness Assemblies

2.1.2 Order of precedence
In the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations, unless a specific exemption has been obtained.In the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations, unless a specific exemption has been obtained.

2.2 Government Documents
Copies of these documents are available online athttp://assist.daps.dla.mil/wizard/ or from the Standardization Document order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, Pennsylvania 19111-5094, U.S.A.

2.2.1 Specifications, Standards and Handbooks
The following specification, standards and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract.

FEDERAL SPECIFICATIONS

  • BB-A-106 Acetylene, Technical, Dissolved
  • BB-C-101 Carbon Dioxide (CO2): Technical and USP
  • BB-H-886 Hydrogen
  • BB-H-1168 Helium, Technical
  • BB-O-925 Oxygen, Technical, Gas and Liquid

COMMERCIAL ITEM DESCRIPTION

  • A-A-59503 Nitrogen, Technical
    DEPARTMENT OF DEFENSE SPECIFICATIONS
  • Mil-A-18455 Argon, Technical

DEPARTMENT OF DEFENSE STANDARDS

  • Mil-STD-1916 Preferred Methods for Acceptance of Product
  • Mil-STD-2219 Fusion Welding for Aerospace Applications

3.0 GENERAL REQUIREMENTS
3.1 General Requirements
The purpose of these qualification requirements is to ensure that qualified procedures are used by properly trained and qualified personnel. It shall be the responsibility of the contractor to ensure that only qualified personnel, procedures, and nondestructive test equipment are used in fabrication and inspection necessary to comply with this document. Procedures and personnel previously qualified or approved shall not require re-qualification provided that qualifications are appropriate for the production brazing, welding and soldering to be done and have not lapsed, and provided that qualification records are available to substantiate prior qualification or approval.

3.2 Welding procedure qualification
Prior to engaging in production welding, the welding procedure for Class B of Mil-STD-2219 shall be qualified. The pertinent welding variables shall be identified. AWS-B2.1 should be used as a guideline in the development of the welding procedure to ensure that all pertinent variables and tolerances are included. Re-qualification criteria shall be determined by the cognizant engineering organization.

3.2.1 Clarification of classes
Class B: Semi-critical applications. A weldment is semi-critical when a failure would reduce overall efficiency of the system but loss of the system or endangering of personnel would not be experienced.

3.3 Brazing procedure qualification
Prior to engaging in production brazing, the brazing procedure for AWS-B2.2 and AWS-C3.4 shall be qualified. The pertinent brazing variables shall be identified. AWS-A3.0 should be used as a guideline in the development of the brazing procedure to ensure that all pertinent variables and tolerances are included. Re-qualification criteria shall be determined by the cognizant engineering organization.

3.4 Soldering procedure qualification
Prior to engaging in production soldering, the soldering procedure for IPC J-STD-001D and IPC/WHMA-A-620 shall be qualified. The pertinent soldering variables shall be identified. IPC J-STD-001D and IPC/WHMA-A-620 should be used as a guideline in the development of the soldering procedure to ensure that all pertinent variables and tolerances are included. Re-qualification criteria shall be determined by the cognizant engineering organization.

4.0 COGNIZNAT ENGINEERING ORGANIZATION
ITW Military GSE’s Engineering Group shall be the cognizant engineering organization responsible for the design of the welded, brazed and soldered assembly. This definition does not limit the Engineering Group to the design personnel but should include the appropriate engineering personnel in the organization’s material and process group, stress analysis group, welding shop and quality control as appropriate to the particular weldment.

4.1 Example
The following example is provided to add clarity:
ITW Military GSE’s Engineering Group is the design organization for a weldment assembly. Welding is performed both in-house and at a subcontractor. The engineering personnel at ITW Military GSE must approve any deviation from the design.

Revisions
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