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Seamless steel pipe manufacture

Seamless steel pipe manufacture Datang,Steel pipe production plays an important role in the national economy, and all countries in the world attach great importance to the development of steel pipe production technology. At present, the annual output of steel pipes in the world has exceeded 700,000 tons. In the consumption of steel materials in developed countries, the proportion of steel pipes accounts for about 6% to 1%.
Seamless steel tubes are mainly used in high temperature, high pressure, corrosion resistant environments or industrial sectors where high or important requirements are required. Although some pipelines and structural pipes have been partially replaced by welded pipes, but the cheap continuous casting billet is directly in seamless The production of seamless steel tubes will be promoted in the production of steel pipes.

The perforated head is one of the most consumed tools in the production of seamless steel tubes. During the perforation process, the plug directly contacts the inner wall of the high temperature tube blank, and is subjected to large axial, radial and tangential stresses. Due to the combination of high temperature and friction, the head is easily damaged and the surface of the tube blank is damaged. As a result, the surface quality of the finished pipe is poor, so increasing the life of the plug is one of the important factors to ensure high productivity and quality of the steel pipe.
Alloy pipes and tubes
1、12Cr5Mo NT、12Cr5MoI 、12Cr9Mo、15CrMo、12Cr2Mo—GB9948
2、P5 、 P22、 P9、 P11、P22、P91、P92—ASTM / ASME A335
3、T91、 P91、T 92 P92—ASTM / ASME A213
Carbon pipes and tubes
1、structure pipe , fluid pipe , low and medium pressure pipe
20#—GB/T8162、GB/T8163、GB3087; Gr. B— A/SA53
2、 line pipe
Gr. B、X42、X46、X52、X56、X60、X65—API 5L PSL1 & PSL2;
3、 mechanical pipe
4、Petroleum cracking tube , High pressure chemical fertilizer pipe, high-pressure boiler tube
20#—GB9948;20#、16Mn—GB6479; 20G、25MnG—GB5310; ST45.8/III—DIN17175; Gr. B & C—A/SA106

Low temperature pipe and tube
1、Gr.1、Gr.6、Gr.3—A/ SA 333;
Gas cylinder pipe and tube
2、 Gr.4130、4135—ASTM A519;
3、 34CrMo4—EN10083
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