basic knowlegye of Small diameter cold drawn precision steel pipe
Small diameter cold drawn precision steel pipe: it is used in the mechanical structure, the size of the hydraulic equipment of high precision and good surface finish of seamless steel tube. Seamless steel pipe must adopt the method of cold rolling, cold drawing or both combined. Cold drawing usually in 0.5 ~ 100 t single or double chain chain cold drawing machine. High-quality small cold drawn steel tube is mainly used for 10, 20, steel manufacturing, in addition to guarantee the chemical composition and mechanical properties to do water pressure test, edge, flaring, flattening test, etc.
The classification of small cold drawn steel tube:
1, GB/T8162-1999 (structure with seamless steel tube). Mainly used for the general structure and the mechanical structure. It represents material (brand) : carbon steel, 45 # steel 20; Alloy steel Q345, 20 crmo 20 cr, cr, 40, 30-35 crmo, 42 crmo, etc.
2, GB/T8163-1999 small cold drawn steel tube (transmission fluid with seamless steel tube). Mainly used in engineering and large equipment in pipes conveying fluid. On behalf of the material (brand) of 20, Q345, etc.
3, GB3087-1999 (low intermediate pressure boiler seamless steel tube). Mainly used in industrial boiler and boiler of low intermediate pressure fluid pipe life. On behalf of the material for 10, 20 steel.
4, GB5310-1995 (high pressure boiler seamless steel tube). Is mainly used for power plant and nuclear power plant boiler high temperature resistant, high voltage transmission fluid collection box and the pipeline. On behalf of the material of 20 g, 12 cr1movg, 15 crmog, etc.
5, GB5312-1999 (ship with carbon steel and carbon manganese steel seamless steel tube). Mainly used for Marine boiler and overheating is used the I and class II pressure tube, etc. On behalf of the material for 360, 410, 460, steel grade, etc.
6, GB1479-2000 (high pressure chemical fertilizer equipment with seamless steel tube). Mainly used for fertilizer equipment in high temperature and high pressure liquid pipeline. On behalf of the material for 20, 16 mn, 12 crmo, 12 cr2mo, etc.
7, GB9948-1988 (seamless steel tube used in oil cracking). Mainly used in oil refineries in the boiler, heat exchangers and pipe conveying fluid. Its representative material of 20, 12 crmo, 1 cr5mo, 1 cr19ni11nb, etc.
8, GB18248-2000 (cylinders with seamless steel tube). Mainly used for making all kinds of gas, hydraulic cylinders. It represents material for 37 mn, 34 mn2v, 35 crmo, etc.
9, GB/T17396-1998 (hydraulic prop with hot rolled seamless steel tube). Is used mainly for coal mining hydraulic support and cylinder, column, and other hydraulic cylinder, column. Its representative material of 20, 45, 27 simn, etc.
10, GB3093-1986 (diesel engine with high-pressure seamless steel tube). High pressure oil pipe is mainly used for diesel injection system. The steel pipe for cold drawn pipe commonly, its representative material to 20 a.
Difference of PSL1 and PSL2(API 5L)
The API 5L has two standards, PSL1 and PSL2, which are very different from each other. I'll talk more about the differences between PSL1 and PSL2.
Production Process of Pipe Fitting
There are many kinds of processing methods for pipe fittings.
The Future of Steel Pipe Development
The future of steel pipe development is looking promising, according to expert analysis and data. The price of carbon steel pipe is predicted to bounce back this year, with China leading the way in increasing steel consumption demands. This is due to a series of government initiatives aimed at stimulating domestic demand, including the construction of affordable housing and infrastructure projects. The demand for structural steel pipe is also on the rise, thanks to state investment in housing and engineering projects. With private investment projects also gaining popularity, the steel pipe market is set to thrive in 2017.
