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Analysis of pipeline welding defect
Groups hole At the time of the extinction, the protective effect of the arc and sla is weakening and easy to be prone porosity and other defects in the crater. The extent of the defects can be removed when the next track weld joints, eliminating the effects of good or bad depends on the joint whe...Read more -
Forging methods of alloy steel tube
Forging methods of alloy steel tube Forged steel pipe can be divided into free forging, upsetting, extrusion, forging, closed die forging, closed upsetting. Closed die forging and closed upsetting because there is no flash, material utilization is high. With a process or several processes may be ...Read more -
ERW Pipe’s development prospects and facing issues
ERW Pipe‘s development prospects and facing issues Resistance welding is short of ERW steel pipe with number of advantages, such as high productivity, low cost, good dimensional accuracy, beautiful appearance. However, in the past, due to the poor reliability of the weld, great limitations ...Read more -
Cooling in continuous casting
Continuous casting process is gradually cooled and solidified by forced into a hot slab physical process, but also the slab during solidification to withstand solidification shrinkage, cooling shrinkage, shrinkage phase transition shrinkage stress, thermal stress caused by temperature gradients, ...Read more -
Characteristic of casing pipe
Casing is important to oil drilling equipment, and its main equipment includes drill, core pipe and casing, drill collars and drilling small diameter steel pipe and so on. The casing is used to support oil and gas wall of the pipe, to ensure that the drilling and completion of the process of the ...Read more -
Applications of lined steel pipe
Lined steel pipe technology inherited respective advantages of lined steel pipe and plastic pipe, and conduct comprehensive analysis of the rational design of the pipe according to market demand, production technology, corrosion protection, connection, cost and other aspects. Thus, the pipe has a...Read more