During a real-life pipeline repair, what sequence ensures both safety and weld integrity?
Isolating pipeline, cleaning joint, aligning, tack welding, final welding
Safety comes first, so the pipeline must be isolated and drained before any hot work begins to avoid pressure or flammable hazards.
Next the joint is cleaned to remove rust and contaminants, then the pipe ends are aligned to the correct fit-up.
Tack welding holds the aligned parts in position, and finally the full welding is carried out to complete the joint.
The correct order is isolating pipeline, cleaning joint, aligning, tack welding, final welding.
Hence, the answer is Isolating pipeline, cleaning joint, aligning, tack welding, final welding.
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