① Pipe wall thickness check: micrometer, ultrasonic thickness gauge, ends not less than 8:00 and recorded.
② Pipe diameter, ovality check: calipers, vernier caliper, ring gauge, measure the maximum points and minimum points.
③ Length of pipe inspection: steel tape, manual, automatic length measurement.
④ Pipe bending degree examination: ruler, the level of foot (1m), feeler, thin measuring curvature per meter, length of curvature.
⑤ Pipe end beveling angle and blunt edge check: Square, pallets.
