Before
Welding
Safety
Ensure that all operations are carried out in complete
compliance with local, company or national Safety legislation.
Documentation
Specification, Drawings, WPS & WPQ approvals,
Calibration certificates, Material and consumables certificates availability
Welding
Process and ancillaries
Welding equipment and related ancillaries like
cables, regulators, torches, ovens etc.
Incoming
Consumables
All pipe/plate and welding consumables for Size,
Type and condition
Marking,
Preparation & Set up
Correct method of cutting weld preparation (preheat
if applicable)
Correct preparation (relevant bevel angles, root face,
root gap, root radius, land etc)
Correct pre-welding distortion control (tacking, bridging,
jigs, and line up clamps)
Correct preheat applied prior to tack welding.
All tack welding to be monitored and inspected.
During
Welding
Preheat values (heating method, location and
control)
In process distortion control, (sequence or balanced
welding)
Consumable control, (specification, size, condition)
Process type and all related variable parameter. (Voltage,
amperage, travel speed)
Purging gases
Welding conditions for root run/hot pass and all subsequent
run and inter run cleaning.
Minimum preheat or maximum inter pass temperature control
After
welding
Visual inspection of the welded joint including
dimensional aspects
NDT requirements.(method, qualification of operator,
and execution )
Identify repairs from assessment of visual or NDT
reports. Repair procedure for repair
PWHT (heating method and temperature recording
system)
Re-inspect with visual/NDT after PWHT if applicable.
Pneumatic, hydrostatic test
Comments
Post a Comment