(plus or minus 2 volts) with different diameters.
The travel speed limits will remain constant. The
current limits, which are based on coating types and
core wire diameter, should be as designated in AWS
A5.1/A5.1M. The heat input, measured in Joules per
mm (Joules per inch),
(Voltage x Current x 60)/(Travel speed inch/minute)
This should not exceed 2,165 Joules per mm (55,000
Joules per inch) for A36 steel. With higher heat
inputs, the weld metal strengths fall below the
specification limits. For gas metal-arc welding,
the maximum heat input should be 1,969 Joules per mm
(50,000 Joules per inch).
**************************************************************************
Except for prequalified (per AWS D1.1/D1.1M) and previously qualified
procedures, each Contractor performing welding shall record in detail and
shall qualify the welding procedure specification for any welding procedure
followed in the fabrication of weldments. Qualification of welding
procedures shall conform to AWS D1.1/D1.1M and to the specifications in
this section. Copies of the welding procedure specification and the
results of the procedure qualification test for each type of welding which
requires procedure qualification shall be submitted for approval. Approval
of any procedure, however, will not relieve the Contractor of the sole
responsibility for producing a finished structure meeting all the
requirements of these specifications. This information shall be submitted
on the forms in Appendix E of AWS D1.1/D1.1M. Welding procedure
specifications shall be individually identified and shall be referenced on
the detail drawings and erection drawings, or shall be suitably keyed to
the contract drawings. In case of conflict between this specification and
AWS D1.1/D1.1M, this specification governs.
1.5.1
Previous Qualifications
Welding procedures previously qualified by test may be accepted for this
contract without requalification if the following conditions are met:
a. Testing was performed by an approved testing laboratory, technical
consultant, or the Contractor's approved quality control organization.
b. The qualified welding procedure conforms to the requirements of
this specification and is applicable to welding conditions encountered
under this contract.
c. The welder, welding operator, and tacker qualification tests
conform to the requirements of this specification and are applicable to
welding conditions encountered under this contract.
1.5.2
Prequalified Procedures
Welding procedures which are considered prequalified as specified in AWS
D1.1/D1.1M will be accepted without further qualification. The Contractor
shall submit for approval a listing or an annotated drawing to indicate the
joints not prequalified. Procedure qualification shall be required for
these joints.
SECTION 05090A
Page 8
Previous Page
