1. For pipelines with high requirements for peak regulation, due to the uneven gas consumption of users and frequent fluctuations in pipeline pressure, the alternating stress on the steel pipe is very large, and the existing defects in the pipe will expand under the alternating stress. If you choose

1. Different representations: hot-dip galvanized steel pipes generally refer to the standard nominal diameter of water pipes, which are expressed in DN. Hot-dip galvanized steel pipe SC means that the wire is laid through steel pipe (low-pressure fluid welded steel pipe). SC is an ordinary welded st

Common Defects of Cathodic Protection for Long-Distance Natural Gas Steel PipelinesAfter a long period of operation, many problems have arisen in the application of cathodic protection systems for long-distance natural gas steel pipelines. On the one hand, the cathodic protection equipment is old an

The forming methods for manufacturing large-diameter straight seam welded steel pipes include UOE forming, row forming (CFE), CE forming, etc. For the last process of most forming methods, the full-length diameter expansion of the welded tube blank is performed again to improve the shape of the weld