For the 21st century, China's natural gas industry will enter a development period of "natural gas" as a symbol, natural gas source diversification, and city gas transition to natural gas. China has abundant natural resources, coupled with the increasing proved reserves and imported natural gas, making the construction of gas transmission lines and downstream branch pipe network become a reality, in fact, our pipeline industry in the second construction boom has arrived.
Currently, cities across the country are all promoting and transforming the urban gas pipeline network project, which account for about 45% of the total investment in this project is the pipeline - steel pipe, and according to more than 50 cities gas pipe network design applications, almost all are the high-frequency straight seam resistance welded steel pipe (Electric Resistance Welding, ERW steel pipe for short). However, due to the experience issue, there is a big difference of the mastering content of ERW steel pipe specifications, resulting in ERW steel pipe manufacturer for each project must face different process parameters, increasing the difficulty of the work, and some even produce overcapacity problem.
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