1.5.2.3
Welder's Qualifications
Before welder or operator performs welding, submit three copies of Welder's
Performance Qualification Record in conformance with ASME B31.9showing that
the welder was tested under the approved procedure specification submitted
by the Contractor. In addition, submit each welder's assigned number,
letter, or symbol used to identify the work of the welder.
1.5.2.4
Identification of Welder's Work
Ensure that each welder's assigned number, letter or symbol is affixed
immediately upon completion of the weld. To welders making defective welds
after passing a qualification test, give a requalification test. Upon
failing to pass the test, do not permit welder to work in this contract.
1.5.2.5
Previous Qualifications
Welding procedures, welders, and welding operators previously qualified by
test may be accepted for this contract without requalification subject to
the approval and provided that all the conditions specified in
ASME B31.9 are met before a procedure can be used.
1.5.3
Brazing and Soldering
1.5.3.1
Brazing Procedure
ASME B31.9.
Brazing procedure for joints shall be as outlined in CDA A4015.
1.5.3.2
Soldering, Soldering Preparation, and Procedures for Joints
ASME B31.9 and as outlined in CDA A4015.
1.5.4
Backflow Preventer Certification
Submit a Certificate of Full Approval or a current Certificate of Approval
for backflow preventers.
1.6
SAFETY STANDARDS
1.6.1
Welding
Safety in welding and cutting of pipe shall conform to AWS Z49.1.
1.6.2
Guards
Couplings, motor shafts, gears and other moving parts shall be guarded, in
accordance with OSHA 29 CFR 1910.219. Guards shall be cast iron or
expanded metal. Guard parts shall be rigid and removable without
disassembling the guarded unit.
PART 2
PRODUCTS
2.1
PIPE AND FITTINGS
2.1.1
Hot Water Heating Pipe (Supply and Return)
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NOTE: Specify Schedule 40, 80, or 120 steel or Type
K or L copper as required for temperature and
SECTION 15185N
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