el fayoum Gas Pipeline - European Investment Bank

El Sadat – El Faium Gas Pipeline
Environmental Impact Assessment
3 : project Description
OHSAS 18 0 0 1
« Gas Tungsten Arc Welding (GTAW)
Gas Metal Arc Welding (GMAW)
« Flux Cored Arc Welding (FCAW)
• Submerged Arc Welding (SAW)
(Automatic or Semi-automatic)
Welder Qualification All welding and tacking must be performed by welders who are
currently qualified to applicable codes, and to specific variables and materials of the
procedure. Welders and welding operators must be currently qualified as required by
the applicable ANST/ASME Code.
Welding Procedure The procedure for welding must conform to the current applicable
ASME Code. ASME Section IX forms QW-482 and QW-483 or their equivalent must
be used.
Welding inspections
a) Non destructive tests:
• Radiographic test (R.T. 100%)
• Ultrasonic test (U.T. 10%)
• Die penetrate test for weld let, sweepolet and nippolet (½", 1")
b) Destructive tests (Mechanical Test), includes:
• Tensile test
• Bending test
• Macro etching test
• Impact test
• Nick break test
• Hardness test
Every 200-weld joint we made this test (0.5% of all welds) in the laboratory of the faculty of
engineering.
3.7.6 Tie in including valves
Valves requiring frequent operation, and located more than 2 meters (6 feet - 9
inches) above the operating level, require extension stems
November 2009
35
Egyptian Natural Gas Co. (GASCO)