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BSG - 1st Chinese manufacturer of stretch-reduced welded tubes
Feb 3, 2010
China National Petroleum Corporation [CNPC] ordered a stretch reducing block and a rotating hot saw, which are the core of the new continuous production plant. The order was placed within the frame of the new construction of a welding tube plant at its subsidiary Baoji Petroleum Steel Pipe Co., Ltd. [BSG] in Baoji, China.
After completion, the new plant will produce up to 300.000 t/a high-quality welded tubes. The range of products includes tubes within a diameter range of 60.3 to 177.8 mm with wall thicknesses of 4.83 to 13.72 mm according to international standards for applications in the oil and gas industry.
The 3-roll stretch reducing block, which will be used for the first time in a tube welding plant, will roll all finished sizes out of only one mother size of 193,7 mm diameter. The block will be designed for the use of up to 24 non-adjustable and adjustable stands with a nominal roll diameter of 360 mm. The last three stands used in the block are adjustable finishing stands, the other stands are non-adjustable reducing stands. The quick changing system for the stands and the roll shop with quick roll changing considerably reduce the required quantity of changing stands for an optimum production.
The rotating hot saw, which will be installed between block and cooling bed, allows the production of different tube lengths with tightest length tolerances. Thus, complicated batch conveyors and saws behind the cooling bed can be omitted and this reduces the investment and maintenance costs.
Furthermore, the following units belong to the scope of supply: roll shop equipment, electrical equipment, automation systems as well as basic engineering for local production which is obligatory in China, as, for example, gratings, roller conveyors, ejector and cooling bed. Supervision of assembly and commissioning, training of operators as well as the transmission of process know-how are also the plantmaker´s responsibility.
Commissioning of the new tube mill is planned for the second half of 2011.
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BSG - 1st Chinese manufacturer of stretch-reduced welded tubes
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