The welded stainless steel pipe has two main features, one is that the small diameter welded stainless steel pipe is continuously produced online. The thicker the wall thickness of the pipe, the larger the investment scale of the unit and welding equipment, the worse the economy and practicality of this kind of welded stainless steel pipe. The thinner the wall thickness, the input-output ratio of the stainless steel pipe will decrease correspondingly.
Secondly, the process of welding stainless steel pipe determines its advantages and disadvantages, usually the precision of the welded stainless steel pipe is higher, the wall thickness is more uniform, the surface light of the inner wall of the pipe is high (the surface grade of the stainless steel plate determines the surface brightness of the stainless steel pipe) and can be arbitrarily fixed. Therefore, the welded stainless steel pipe is in high precision and middle low pressure flow. The application of body shows good economy and beauty.
Material and use of stainless steel welded pipe
The welded stainless steel pipes are divided into 6 types according to their materials and uses.
The first kind is GB/T3092-1993 (galvanized steel pipe for low pressure fluid delivery). This kind of stainless steel pipe is mainly used for transporting water, gas, air, oil and heating hot water or steam and other general low pressure fluid and other use pipes. The representative material is Q235 a grade steel.
The second is GB/T3091-1993 (galvanized steel pipe for low pressure fluid delivery). This kind of steel pipe is mainly used for transporting water, gas, air, oil, heating hot water or steam and other general low pressure fluids and other use pipes.
The third is GB/T12770-1991 (stainless steel welded pipe for mechanical structure), which is mainly used for mechanical, automobile, bicycle, furniture, hotel and hotel decoration and other mechanical parts and structural parts. Its representative material is 0Cr13, 1Cr17, 00Cr19Ni11, 1Cr18Ni9, 0Cr18Ni11Nb and so on.
The fourth one is GB/T14291-1992 (mining fluid conveying welded steel pipe), which is mainly used for longitudinal welded steel pipe for mine ventilation, drainage and gas.
The fifth one is GB/T12771-1991 (stainless steel welded pipe for fluid transportation), which is mainly used for conveying low pressure corrosive medium. The representative materials are 0Cr13, 0Cr19Ni9, 00Cr19Ni11, 00Cr17, 0Cr18Ni11Nb, 0017Cr17Ni14Mo2, etc.
The last kind is GB/T14980-1994 (large diameter welding steel pipe for low pressure fluid delivery), which is mainly used for the low pressure fluid and other uses such as water, sewage, gas, air, heating steam and so on.
Source: China Stainless Steel Welded Pipe Manufacturer – Yaang Pipe Industry Co., Limited (www.yaang.com)