Cangzhou Botop International Co., Ltd

Seamless Carbon Tubing  is made of steel ingots or solid tube blanks through perforation to make capillaries, and then hot rolled, cold rolled or cold drew. Seamless carbon steel pipe plays an important role in China's steel pipe industry. According to incomplete statistics, there are about 240 seamless carbon steel pipe production enterprises in China, about 250 sets of seamless carbon steel pipe units, and an annual output capacity of about 4.5 million tons. In terms of caliber, those with <φ76 account for 35%, and those with <φ159-650 account for 25%. In terms of variety, 1.9 million tons of general-purpose pipes, accounting for 54%; 760,000 tons of petroleum pipes, accounting for 5.7%; 150,000 tons of hydraulic props and precision pipes, accounting for 4.3%; stainless steel, bearing tubes, and automotive pipes totaling 50,000 Tons, accounting for 1.4%. Seamless Carbon Tubing The raw material of the seamless carbon steel pipe is a round pipe blank. The round pipe bl...

Seamless Steel Pipe  is a long strip of steel with a hollow section and no seams around it. The thicker the wall thickness of the product, the more economical and practical it is. The thinner the wall thickness, the higher the processing cost. Seamless Steel Pipe The technology of this product determines its limited performance. Generally, the seamless steel pipe has low accuracy: uneven wall thickness, low brightness on the inside and outside of the tube, high scale costs, and pits and black spots on the inside and outside. Shaping must be processed offline. Therefore, it shows its superiority in terms of high pressure, high strength, and mechanical structural materials. According to the rolling method, it is divided into hot rolling, hot extrusion and cold drawing (rolling) stainless steel pipe. According to the stainless steel metallographic structure, it is divided into semi-ferritic and semi-martensitic stainless steel seamless pipes, martensitic stainless steel sea...

LSAW Steel Pipe  is a professional term for LSAW steel pipe. LSAW steel pipe is produced from a single medium and heavy plate, which is pressed into a tube blank in a mold or forming machine, and is expanded by double-sided submerged arc welding. The finished product has a wide range of specifications, good toughness, plasticity, uniformity and compactness of the weld, and has the advantages of large pipe diameter, pipe wall thickness, high pressure resistance, strong resistance to low temperature and corrosion. When constructing high-strength, high-quality long-distance oil and gas pipelines, most of the steel pipes required are large-caliber thick-walled straight seam submerged arc welded pipes. According to API standards, in large oil and gas pipelines, straight seam submerged arc welded pipes are the only designated applicable pipe type when passing through Class 1 and Class 2 areas such as the alpine zone, the seafloor, and densely populated urban areas. LSAW Steel Pipe ...

Due to different manufacturing processes, seamless steel pipe can be divided into two types: hot-rolled (extrusion) seamless steel pipe and cold drawn (rolled) seamless steel pipe. Cold drawn (rolled) tubes are divided into two types: round tubes and shaped tubes. a. Process overview Hot-rolled (extrusion seamless steel pipe): round tube blank heating perforation three-roll cross-rolling, continuous rolling or extrusion de-pipe sizing (or reducing diameter) cooling the blank tube straightening hydraulic test (or flaw detection) mark into the warehouse. Cold drawn (rolled) seamless steel pipe: round tube blank heating perforated head annealing acid pickling oil (copper plating) multi-pass cold drawing (cold rolling) blank tube heat treatment straightening hydraulic test (inspection) mark storage. b. Seamless steel pipes are divided into the following varieties due to their different uses: GB/T8162-2008 (seamless steel pipe for structure). Mainly used for general structural a...

Alloy pipe is a kind of seamless steel pipe . Its performance is much higher than that of ordinary seamless steel pipe. Because this steel pipe contains more Cr, its high temperature resistance, low temperature resistance and corrosion resistance are other. Sewed steel pipes can not match, so alloy pipes are widely used in petroleum, chemical,electric power, boiler and other industries.　　 Mainly standard of Alloy Steel Pipe: GB/T8162, GB3087, GB5310, ASME SA210, ASME SA213, DIN17175 　　 Application:For heating pipes with low and medium pressure boilers (working pressure is generally not more than 5.88Mpa, working temperature is below 450°C); used in high pressure boilers (working pressure is generally above 9.8Mpa, working temperature is between 450°C and 650°C) Heating surface pipe, economizer, superheater, reheater, petrochemical industrial pipe, etc.  Mainly Grade: 20MnG, 25MnG, 15CrMoG, 35crmo, 42crmo, 12Cr2MoG, 12Cr1MoVG, 12Cr2MoWVTiB, 10Cr9Mo1VNb, 10crmoal, 9cr5mo....

ASTM A252 GR.2 ERW Steel Piles Pipe Standard: ASTM A252 Application of ASTM A252 ERW Steel Pipe : Pipe ordered under this specification is for pipe piles in which the steel cylinder acts as a permanent load-carrying member, or as a shell to form cast –in-place concrete piles. Manufacturing Process of pipe piles steel pipe : By electric resistance welded Details of ASTM A252 ERW Steel Pipe We can supply: Manufacture: Carbon ERW Steel Pipe Size: O.D.: 168～700mm W.T.: 2～20mm Grade: Gr1, Gr2, Gr3 Length: 6M or specified length as required. Ends: Plain End, Beveled End. Chemical Composition  of Seamless Steel Piles Pipe : The steel shall contain no more than 0.050 % phosphorous. Tolerance of outside diameter, wall thickness, length and weight: Outside Diameter The outside diameter of pipe piles shall not vary more than ±1% from the specified outside diameter. Wall thickness The wall thickness at any point shall not be more than 12.5% under the spec...