China is a big steel country. Nowadays, the popularity of seamless steel pipes has made the Chinese manufacturing industry have more room for development. Next we will introduce you to our Wansteel seamless steel tubes, including models and sample pictures.
Seamless steel pipes (SMLS) is suitable for bending and flanging and it is formed by drawing a solid billet over a piercing rod to create the hollow shell, without welding or seam. It is widely used for boiler and pressure vessel, automotive area, oil well, and equipment components because the most advantage is increasing the ability of withstanding higher pressure. And it can be cut, threaded or grooved. The coating method includes black / red lacquer, varnish painting, hot dip galvanization, etc.
API SPEC5CT-1999 (Casing and Tubing Specification):
It is compiled and published by the American Petroleum Institute (“AP”), is used worldwide. Among them: Casing: a pipe that protrudes into the well from the ground surface and is used as a lining of the well wall, and the pipes are connected by a coupling. The main materials are steel grades such as J55, N80, P110. And steel grades such as C90 and T95 which are resistant to hydrogen sulfide corrosion. Its low steel grade (J55, N80) can be welded steel pipe.
Tubing: A pipe that is inserted into the casing from the surface of the ground up to the oil layer, and the pipes are connected by coupling or integral. Its function is that the pumping unit transports oil from the oil layer to the ground through the oil pipe. The main materials are J55, N80, P110, and steel grades such as C90 and T95 which are resistant to hydrogen sulfide corrosion. Its low steel grade (J55, N80) can be welded steel pipe.
Seamless steel pipes can be divided into the following types due to their uses:
GB/T8162-1999 (seamless steel pipes for structure)：
Mainly used for general structural and mechanical structures. Its representative material (brand): carbon steel 20, 45 steel; alloy steel Q345, 20Cr, 40Cr, 20CrMo, 30-35CrMo, 42CrMo and so on.
GB/T8163-1999 (seamless steel pipes for conveying fluid)：
Mainly used for conveying fluid pipelines on engineering and large equipment. The representative material (brand) is 20, Q345, etc.
GB3087-1999 (seamless steel pipes for low and medium pressure boilers)：
Mainly used in industrial boilers and domestic boilers to transport low and medium pressure fluid pipelines. The representative material is steel No. 10 and No. 20.
GB5310-1995 (seamless steel tubes for high pressure boilers)：
It is mainly used for high temperature and high pressure conveying fluid gathering boxes and pipelines on power stations and nuclear power plant boilers. Representative materials are 20G, 12Cr1MoVG, 15CrMoG, etc.
GB5312-1999 (carbon steel and carbon-manganese steel seamless steel pipes for ships)：
It is mainly used for I and II pressure pipes for ship boilers and superheaters. Representative materials are 360, 410, 460 steel grades, etc.
GB1479-2000 (seamless steel pipes for high pressure fertilizer equipment)：
It is mainly used to transport high temperature and high pressure fluid pipelines on fertilizer equipment. Representative materials are 20, 16Mn, 12CrMo, 12Cr2Mo and the like.
GB9948-1988 (seamless steel pipes for petroleum cracking)：
Mainly used in boilers, heat exchangers and pipelines for conveying fluids in petroleum smelters. The representative materials are 20, 12CrMo, 1Cr5Mo, 1Cr19Ni11Nb and the like.
GB18248-2000 (seamless steel pipes for gas cylinders)：
Mainly used to make various gas and hydraulic cylinders. The representative materials are 37Mn, 34Mn2V, 35CrMo, and the like.
GB/T17396-1998 (hot rolled seamless steel pipes for hydraulic props)：
Mainly used to make coal mine hydraulic supports and cylinders, columns, and other hydraulic cylinders and columns. Its representative materials are 20, 45, 27SiMn and the like.
GB3093-1986 (high pressure seamless steel pipes for diesel engines)：
Mainly used for high pressure fuel pipe of diesel engine injection system. The steel pipe is generally a cold drawn pipe, and its representative material is 20A.
GB/T3639-1983 (cold drawn or cold rolled precision seamless steel pipes)：
It is mainly used for mechanical structures, carbon pressure equipment, steel tubes with high dimensional accuracy and good surface finish. It stands for material 20, 45 steel and so on.
GB/T3094-1986 (cold drawn seamless steel pipes shaped steel pipes)：
Mainly used in the production of various structural parts and parts, the material is high quality carbon structural steel and low alloy structural steel.
GB/T8713-1988 (precision inner diameter seamless steel pipes for hydraulic and pneumatic cylinders)：
It is mainly used for the production of cold drawn or cold rolled seamless steel tubes with precision inner diameter for hydraulic and pneumatic cylinders. Its representative material is 20, 45 steel and so on.
GB13296-1991 (stainless steel seamless steel tubes for boilers and heat exchangers)：
Mainly used in boilers, superheaters, heat exchangers, condensers, catalytic tubes, etc. of chemical enterprises. High temperature resistant, high pressure, corrosion resistant steel pipe. The representative materials are 0Cr18Ni9, 1Cr18Ni9Ti, 0Cr18Ni12Mo2Ti and the like.
GB/T14975-1994 (stainless steel seamless steel pipes for structure)：
It is mainly used for general structure (hotel, restaurant decoration) and steel pipe for atmospheric and acid corrosion and has certain strength for mechanical structure of chemical enterprises. The representative materials are 0-3Cr13, 0Cr18Ni9, 1Cr18Ni9Ti, 0Cr18Ni12Mo2Ti and the like.
GB/T14976-1994 (stainless steel seamless pipes for fluid transportation)：
Mainly used for conveying corrosive media. Representative materials are 0Cr13, 0Cr18Ni9, 1Cr18Ni9Ti, 0Cr17Ni12Mo2, 0Cr18Ni12Mo2Ti, and the like.
YB/T5035-1993 (seamless steel tubes for automotive semi-axle bushings)：
It is mainly used for the production of high-quality carbon structural steel and alloy structural steel hot-rolled seamless steel tubes for automobile semi-axle bushings and axles for drive axles. Its representative materials are 45, 45Mn2, 40Cr, 20CrNi3A and the like.
SHANDONG WAN STEEL Import and Export Co., Ltd. , the professional steel pipe supplier with more than 30 years experience in China. Seamless steel pipe, spiral steel pipe, welded steel pipe, hot dipped galvanized steel pipe, precision alloy seamless steel pipe and stainless steel seamless pipe are our main products. We have various kinds of pipes in large stock at any time which can meet your individual requirements in terms of quantity and quality. If you have any needs please contact us at the first time. We will give you the best answer!