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Where are the manufacturers of large-diameter thick-walled straight-seam steel pipes and double-sided submerged arc welded straight-seam steel pipes?

The production process you mentioned is JCOE or UOE.

1990 can be used to evaluate the construction of large diameter longitudinal submerged arc welded pipe units in China since the grinding year;

Serial number company (factory) molding method

1 UOE Baoshan iron and steel co., ltd

2 Qinhuangdao Wanji Steel Pipe Co., Ltd.

3 PFP of Shashi Steel Pipe Factory, Hubei Province

4 JCOE Julong Steel Pipe Company

5 JCOE Julong Steel Pipe Company

6 UOE Panyu Zhujiang steel pipe company

7 Panyu Pearl River Steel Pipe Company HM

8 JCOE Panyu Zhujiang Steel Pipe Company

9 UOE Liaoyang steel pipe co., ltd

10 UOE Liaoyang steel pipe co., ltd

1 1 Baoji Steel Pipe Co., Ltd. JCOE

12 Wuxi Yulong steel pipe co., ltd. JCOE

References:

China oil and gas pipeline welded pipe continues to develop in structural adjustment.