Problems to be solved in building large straight seam welded pipe units in China

1, Choose the right process
From the comparison of several large longitudinal welded pipe technology and the analysis of the development of the large longitudinal welded pipe technology in the world, UOE unit is the main dsaw pipe unit in the world that produces high strength pipeline steel pipe. Its production capacity is large, product quality it is good. It is very necessary to build 1 or 2 UOE units of world advanced level to produce high quality steel pipes for oil and gas pipelines. In addition, 2 to 3 sets of other dsaw pipe units such as C-pressure forming and continuous roll forming (CFE) can also be constructed. 

2, To determine a reasonable industrial layout
Large straight seam welded pipe production line layout should consider the distribution of pipelines, the future development plan. At present, large-scale pipeline construction is mainly concentrated in the western and northern regions of our country. At the same time, we should also consider the transportation of raw material steel plates used for large straight seam welded pipes so as to solve the transportation problem of super long and wide steel plates. Therefore, the layout of the production line of large straight seam welded pipe has two options: one is that the site of the large straight seam welded pipe production line is as close as possible to the pipe construction area, which is good for transporting steel pipe to the pipelines under construction because the no-load rate of railway transportation pipe. The other is a large straight seam welded pipe production line near the site of steel production base or port, so you can solve the long super-wide steel transport problems, ease of transport of steel. 

3, Provide high-quality steel for raw materials
Large straight seam welded pipe unit production of raw materials is mainly produced by plate mill wide steel plate (except for less than 600mm of steel can be produced by hot rolling mill outside the plate), the requirements of the supply of high quality steel. Oil and gas pipelines with high strength, toughness, weldability, H2S corrosion resistance and other aspects of the need for higher performance, the general use of low-carbon micro-alloy controlled rolling plate. Therefore, the requirements of the plate mill with advanced smelting equipment (especially refined Equipment) and a wide plate mill with perfect rolling control performance to produce hot-rolled wide steel plates of grade X60 ~ X75 or above and feed large straight seam welded pipe unit as raw material, so as to produce pipeline steel pipe conforming to API standard to meet the pipeline construction and development needs.