Acceptance method of straight seam welded steel pipe1. The inspection and acceptance of straight seam welded steel pipes shall be carried out by the technical supervision department of the supplier.2. The supplier guarantees that the delivered straight seam welded steel pipe meets the requirements o

The standard for storage of anti-corrosion steel pipes1. The appearance of the anti-corrosion steel pipe in and out of the warehouse needs to be inspected as follows:① Check one by one to ensure that the surface of the polyethylene layer is flat and smooth, and there are no dark bubbles, pits, wrink

Anti-corrosion method of oil casing1. To make sure that the water quality meets the standards, and strictly monitor and manage the water quality.Implement cleaning and separate injection, strengthen the cleaning of main water pipelines, ensure that the water quality in the station and the bottom of

Structure and characteristics of thermal insulation large-diameter spiral welded pipe1. Features of heat preservation large-diameter spiral welded pipe:Polyurethane foam has good mechanical properties and thermal insulation properties. Under normal circumstances, it can withstand a temperature of 12