1. The acceptance principle of spiral steel pipe.The quality inspection and acceptance of the spiral welded pipe shall be carried out by the technical quality supervision department of the supplier. The supplier must ensure that the delivered spiral welded pipe meets the requirements of the correspo

Spiral steel pipe maintenance medium transportation is an important part of it. Spiral steel pipe is the anti-corrosion of the outer wall of high-grade steel oil, gas, water, and heating pipelines, and the durability of spiral steel pipe has improved to a better level. The durability of the spiral s

1. Ultrasonic detection When the ultrasonic wave is dispersed in the tested raw material, the acoustic characteristics of the raw material and the transformation of the internal structure will positively impact the ultrasonic wave propagation. By detecting the affected level and situation of the ult

1. If the buyer has special requirements for the packaging material and packaging method of the spiral steel pipe, it should be specified in the contract; if not specified, the packaging material and packaging method can be selected by the supplier.2. Packaging materials should comply with relevant