Russian standard straight seam welded pipe grade

 　　GOST 10704-91，GOST 10705-80，GOST 10706   GOST C90

　　Ø 57-530 mm

　　Russian Standard GOST 10704 Arc-welded straight seam steel pipe. Range of sizes LSAW

　　Similar standards in China are GB/T 30063-2013 Structural use of straight seam submerged arc welded steel pipes, which can also comply with applicable standardsGB/T3091-2008Production standard for low-pressure fluid steel pipes GB/T9711.1-2 -1997 Standard for the production and use of petroleum and natural gas steel pipes。

　　C345 C355 ERW pipe Russian Standard GOST10705-50

　　GOST 20295standard K55/K52/K56 Longitudinally welded pipes

　　C355Equivalent to domestic Q355

　　K52amount to Q460



评论

发表评论

此博客中的热门博文

National Standard Properties of 304 Stainless Steel Plate

图片
　　 304 stainless steel plate tensile strength (Mpa) 520 　　Yield strength of 304 stainless steel plate (Mpa) 205-210 　　Elongation rate of 304 stainless steel plate (%) 40% 　　304 stainless steel plate hardness HB187 HRB90 HV200 　　The density of 304 stainless steel is 7.93 g/cm3. Austenitic stainless steel generally uses this value. The chromium content (%) of 304 is 17.00 to 19.00, and the nickel content (%) is 8.00 to 10.00304, which is equivalent to 0Cr19Ni9 (0Cr18Ni9) stainless steel in China 　　304 stainless steel is a versatile stainless steel material with stronger rust resistance than the 200 series stainless steel material. It also has good resistance to high temperatures. 　　304 stainless steel has excellent rust resistance and good intergranular corrosion resistance. 　　For oxidizing acids, it was found in experiments that 304 stainless steel has strong corrosion resistance in nitric acid below boiling temperature with a concentration of ≤ 65%. It also has good cor
阅读全文

What is the use of oxygen free copper?

图片
 　　The higher the purity of any copper product , the better its corrosion resistance, the higher its conductivity, and the less heat generated during conductivity. As the purest copper product, C101 oxygen free copper provides the best results for all copper products. 　　By removing almost all impurities, the metal structure of copper is almost uninterrupted, and by removing almost all oxygen, the oxidation of metal copper is significantly reduced, which further hinders performance. 　　Due to the high price of high-purity products, almost all uses of C101 oxygen free copper are highly specialized. This includes: 　　Excellent audio/video applications - Quality critical high-end audio/video applications will use copper wire made of C101 oxygen free copper. 　　The increase in conductivity of C101 oxygen free copper for large industrial transformers can reduce the diameter of the internal wiring in the transformer, thereby reducing the amount of copper used and the overall instal
阅读全文