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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.
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2.0
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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.
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| 2.1 |
Lockheed Martin Aerospace
5PTA3404A, Performance Specification for 12265 – Diesel
PAO Liquid Cooling
Cart
5PTA3405A, Performance Specification for 12265 – Electric PAO Liquid Cooling
Car
2SJS00020, Support Equipment Procurement Specification for CGCAC
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| 2.2 |
ITW Military GSE
09400-1 F22 EPC, Top Assembly
12265, Drawing, Diesel Powered PAO Liquid Cooling Cart, Top Assembly
12264, Drawing, Electric Powered PAO Liquid Cooling Cart, Top Assembly
19817, CGAC, Top Assembly
21863, E-100 AC4, Top Assembly
22838, ASP-100-1A, Top Assembly
24801, CGCAC, Top Assembly
TIQAM__ Quality Systems Manual
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| 2.3 |
Other Government Documents, drawings
and publications
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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.
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2.3.1 |
Non Government publication
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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.
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AEROSPACE INDUSTRIES
ASSOCIATION OF AMERICA, INC (AIA)
Copies of these documents are available from Aerospace Industries
Association, 1000 Wilson Boulevard, Suite 1700, Arlington, VA
22209-3901 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, PA 19428-2959, 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
AMERICAM WELDING SOCIETY (AWS)
Copies of these documents are available from American Welding
Society, 550 N.W. LeJeune Road, Miami, FL 33126, or online at
http://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, VA 20151-2923 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, PA, 15096-0001 or online
at http://www.sae.org.
SAE-AMS2816 Identification Welding Wire, Tab Marking Method
SAE-AMS-STD-2154 Inspection, Ultrasonic, Wrought Metals, Process
for
IPC ASSOCIATION CONNECTING ELECTRONIC INDUSTRIES
Copies of these documents are available from IPC, 3000 Lakeside
Drive, Suite 309S, Bannockburn, IL 60015-1219 or online at http://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
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2.3.2 |
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.
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2.4 |
Government Documents
Copies of these documents are available online at http://assist.daps.dla.mil/wizard/
or from the Standardization Document order Desk, 700 Robbins Avenue, Building
4D, Philadelphia, PA 19111-5094
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2.4.1 |
Specifications, Standards and
Handbooks
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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
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3.0
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GENERAL
REQUIREMENTS
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3.1
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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.
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3.2
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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.
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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.
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3.3
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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.
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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.
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| 4.0 |
COGNIZNAT ENGINEERING
ORGANIZATION
ITW Military GSE 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.
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4.1 |
Example
The following example is provided to add clarity:
ITW Military GSE 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.
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