Materials and Equipment
Receiving and traceability
The inspector must be able to verify that delivered line pipe, fittings, flanges, valves, and coating materials match the specified grade, wall thickness, and specification level, and that mill test reports and heat numbers tie each joint to its certification. Pipe tally and joint numbering are the backbone of traceability through welding, testing, and as-building. Receiving inspection covers dents, buckles, ovality, bevel condition and cleanliness, coating damage and holidays, and end squareness.
Handling and storage
Know the handling rules: padded slings and end hooks, no pipe dropped or dragged, dunnage and side blocks to prevent rolling, limits on stacking, protection of bevels and coating, and separation of coated pipe from damaging surfaces. Equipment matters too - sidebooms rated for the load and configuration, bending machines with the right shoe, calibrated test gauges, and welding machines with documented, functioning parameters.
Traps
Questions like to blur acceptance criteria. Common pitfalls: accepting a dented or buckled joint because "the coating looked fine"; confusing mill defects with handling damage; failing to quarantine rejected material; and using an uncalibrated pressure gauge or deadweight tester on a hydrostatic test. Another trap is assuming a heat number match is sufficient without confirming the mill report covers the actual grade, diameter, and wall thickness delivered.
Worked example
Rule of thumb: anything that cannot be traced to a mill report or a documented receiving inspection does not get installed. If a joint arrives with a dent, tag it, segregate it in a hold area, photograph it, and document the disposition in writing - repair, reject, or return per the specification - before it enters the tally.