Large-diameter welded pipe is the pipe welds, raw materials are mainly steel sheet and strip, large diameter straight seam welded steel pipe is used, the higher productivity of the kinds of steel, more used in more low-cost steel products one. Large diameter spiral welded steel pipe is used, compared to the straight pipe joints, mechanical strength of the products is relatively high, to save raw materials, but the production is slow. The product is widely used in water engineering, petrochemical industry, chemical industry, power industry, agricultural irrigation, urban construction, is one of the products of China's 20 key development. For the transport of liquids: water supply, drainage. For gas transportation: gas, steam, LPG. For structural purposes: as piling pipe for bridges; piers, roads, pipes and other building structures.
In the large-diameter steel pipe welding process, the most commonly used is welded steel pipe, which is mainly used for oil drilling and machinery manufacturing stove pipe can be used as water-gas pipe, large diameter welded pipe for high pressure gas transmission, etc.; spiral welded pipe for oil and gas, piles, piers, etc. seamless steel pipe and welded steel pipe is lower than cost, high production efficiency. Longitudinal simple production technology, high production efficiency, low cost, rapid development. spiral strength than the straight seam welded pipe is generally pipe, can narrow the billet production of large diameter pipe, you can use the same width of the billet production of different pipe diameters, but with a straight seam pipe compared to the same length, the weld length of 30 to 100%. and lower production rate, so the smaller diameter pipe is mostly a straight seam welded, large diameter spiral welded pipe is mostly used.
According to different methods can be divided into arc welding pipe, high or low frequency electric resistance welded pipe, gas pipe, stove pipe, Bundy tubes. According weld shape can be divided longitudinally and spirally welded pipe welded steel refers to steel or steel bending round, square, etc. and then welded into shape, the surface of the steel pipe seams welded steel pipe production process simple, high production efficiency, variety specifications, less capital equipment, but generally lower than the intensity of seamless steel tubes. since the 1930s, along with the rapid development of high-quality steel rolling production, and improve the welding and inspection technology, continuous improvement of weld quality, welded steel pipe increasing number of varieties and specifications, and in more and more areas instead of seamless pipe.
Spiral welded pipe is a low carbon structural steel or a low alloy structural steel strip rolled into a tube blank with a certain helix angle (also called forming angle), and then welded and made into a pipe joint, which can use a narrow strip steel Production of large diameter steel pipes. The strength of the spiral welded pipe is generally higher than that of the straight welded pipe. The main production process is submerged arc welding. The spiral welded pipe can produce welded pipes with different pipe diameters with the same width of blanks, and can also produce welded pipes with larger diameters with narrow blanks. APPLICATION : Boring Pile for Bridge Foundation Tin Tunnel Projects Piling Foundation for wind wheel Columns for billboard towers and projects Water pipeline to Hydro-Electric power station
Grade Group:10#-45#, 16Mn, A53-A369 Grade:20#, 16Mn, A53(A,B), A106(B,C) Thickness:9.53 - 40 mm Section Shape:Round Outer Diameter(Round):350 - 914 mm Place of Origin:Tianjin, China (Mainland) Application:Boiler Pipe Technique:Cold Drawn Certification:API Surface Treatment:Galvanized Special Pipe:API Pipe Alloy Or Not:Non-alloy Secondary Or Not:Non-secondary Name:API 5L Gr B 36 Low Carbon Steel Pipes Material:steel plate Length:6-18 Coating:3pe coating End:belved, plain Application1:oil and gas color:3pe Supply Ability:800 Ton/Tons per Day high quality spiral pipe Packaging & Delivery: Bundles or according to client's requirements high quality spiral pipe. Port:Tianjin port
According to the purpose of welding steel pipe can be divided into general welding pipe, galvanized welding pipe, oxygen blowing welding pipe, wire casing, metric welding pipe, roller pipe, deep well pump pipe, automobile pipe, transformer pipe, welding thin wall pipe, welding special-shaped pipe and spiral welding pipe. 1 JIS G3441 Alloy Steel Tubes for Machine Purposes 2 JIS G3442 Galvanized Steel Pipes for Ordinary Piping 3 JIS G3443 Coated Steel Pipes for Water Service 4 JIS G3444 Carbon Steel Tubes for General Structure 5 JIS G3445 Carbon Steel Tubes for Machine Structure 6 JIS G3452 Carbon Steel Pipes for Ordinary Piping 7 JIS G3454 Carbon Steel Pipes for Pressure Service 8 JIS G3456 Carbon and Alloy Steel Pipes for High Temperature Service 9 JIS G3460 Carbon and Alloy Steel Pipes for Low Temperature Service 10 JIS G3461 Carbon Steel Boiler and Heat Exchanger Tubes 11 JIS G3462 Alloy Steel Boiler and Heat Exchanger Tubes 12 JIS G3464 Steel Heat Exchanger Tubes for Low Temperature Service 13 JIS G3469 Polyethylene Coated Steel Pipe 14 JIS G3475 Carbon Steel Tubes for Building Structure 15 JIS G7217 Plain End Welded Precision Steel Tube
According to the purpose of welding steel pipe can be divided into general welding pipe, galvanized welding pipe, oxygen blowing welding pipe, wire casing, metric welding pipe, roller pipe, deep well pump pipe, automobile pipe, transformer pipe, welding thin wall pipe, welding special-shaped pipe and spiral welding pipe. 1 GB/T 13793 Steel Pipes with a Longitudinal Electric Resistance Weld 2 GB/T 14980 Major Diameter Welded Steel Pipes for Low Pressure liquid Service 3 GB/T 30063 Longitudinal Submerged Arc Welded Steel Tubes for Structural Purpose 4 GB/T 3091 Welded Steel Pipes for Low Pressure Liquid Delivery 5 GB/T 3092 Welded Steel Pipe for Low Pressure Service 6 GB/T 31315 Cold Drawn or Cold Rolled Precision Weld Steel Tubes for Mechanical Structures 7 GB/T 31940 Bi-Metal Composite Corrosion Resistance Steel Pipe for Fluid Transportation 8 GB/T 32970 Longitudinal Submerged-Arc Welded Steel Pipe for High Pressure Service at High Temperatures 9 GB/T 9711 Steel Pipe for Pipeline Transportation System
According to the purpose of welding steel pipe can be divided into general welding pipe, galvanized welding pipe, oxygen blowing welding pipe, wire casing, metric welding pipe, roller pipe, deep well pump pipe, automobile pipe, transformer pipe, welding thin wall pipe, welding special-shaped pipe and spiral welding pipe. 1 ASTM A134 Electric-Fusion (Arc)-Welded (Sizes NPS 16 and Over) Steel Pipe 2 ASTM A135 Electric-resistance-welded(ERW) steel pipe in NPS 2 to NPS 30 3 ASTM A139 Electric-Fusion (Arc)-Welded Steel Pipe (NPS 4 and Over) 4 ASTM A178 Electric-Resistance-Welded(ERW) Carbon Steel and Carbon-Manganese Steel Boiler and Superheater Tubes 5 ASTM A214 Electric-Resistance-Welded(ERW) Carbon Steel Heat-Exchangerand Condenser Tubes 6 ASTM A250 Electric-Resistance-Welded(ERW) Ferritic Alloy-Steel Boiler and Superheater Tubes 7 ASTM A252 Welded and Seamless Steel Pipe Piles 8 ASTM A333 Seamless and Welded Steel Pipe for Low Temperature Service 9 ASTM A334 Seamless and Welded Carbon and Alloy Steel Tubes for Low Temperature Service 10 ASTM A381 Metal-Arc-Welded Steel Pipe for Use With High-Pressure Transmission Systems 11 ASTM A500 Cold-Formed Welded and Seamless Carbon Steel Structural Tubing in Rounds and Shapes 12 ASTM A501 Hot-Formed Welded and Seamless Carbon Steel Structural Tubing 13 ASTM A513 Electric-Resistance-Welded Carbon and Alloy Steel Mechanical Tubing 14 ASTM A523 Plain end Seamless and Electric Resistance Welded Steel Pipe for High Pressure Pipe Type Cable Circuits 15 ASTM A53 Seamless and Welded Black and Hot-dipped Galvanized Steel Pipe 16 ASTM A618 Hot-Formed Welded and Seamless High-Strength Low-Alloy Structural Tubing 17 ASTM A671 Electric-Fusion-Welded Steel Pipe for Atmospheric and Lower Temperatures 18 ASTM A672 Electric-Fusion-Welded Steel Pipe for High-Pressure Service at Moderate Temperatures 19 ASTM A691 Carbon and Alloy Steel Pipe Electric-Fusion-Welded for High-Pressure Service at High Temperatures 20 ASTM A714 High Strength Low Alloy Welded and Seamless Steel Pipe 21 ASTM A795 Black and Hot-Dipped Zinc-Coated (Galvanized) Welded and Seamless Steel Pipe for Fire Protection Use
According to the purpose of welding steel pipe can be divided into general welding pipe, galvanized welding pipe, oxygen blowing welding pipe, wire casing, metric welding pipe, roller pipe, deep well pump pipe, automobile pipe, transformer pipe, welding thin wall pipe, welding special-shaped pipe and spiral welding pipe. 1 EN 10208-1 Steel Pipes for Pipelines for Combustible Fluids-Pipes of Requirement Class A 2 EN 10208-2 Steel Pipes for Pipelines for Combustible Fluids-Pipes of Requirement Class B 3 EN 10217-1 Welded Steel Tubes for Pressure Purposes-Non-alloy steel tubes with specified room temperature properties 4 EN 10217-2 Welded Steel Tubes for Pressure Purposes-Electric Welded Non-alloy and Alloy Steel Tubes with Specified Elevated Temperature Properties 5 EN 10217-3 Welded Steel Tubes for Pressure Purposes-Alloy fine grain steel tubes 6 EN 10217-4 Welded Steel Tubes for Pressure Purposes-Electric Welded Non-alloy and Alloy Steel Tubes with Specified Low Temperature Properties 7 EN 10217-5 Welded Steel Tubes for Pressure Purposes-Submerged Arc Welded Non-alloy and Alloy Steel Tubes with Specified Elevated Temperature Properties 8 EN 10217-6 Welded Steel Tubes for Pressure Purposes-Submerged Arc Welded Non-alloy Steel Tubes with Specified Low Temperature Properties 9 EN 10224 Non-alloy Steel Tubes for the Conveyance of Water and Other Aqueous Liquids 10 EN 10255 Non-alloy Steel Tubes Suitable for Welding and Threading 11 EN 10288 Steel Tubes and Fittings for Onshore and Offshore Pipelines 12 EN 10296-1 Welded Circular Steel tubes for Mechanical and General Engineering Purposes-Non-alloy and Alloy Steel Tube 13 EN 10305-2 Steel Tubes for Precision Applications-Welded Cold Drawn Tubes 14 EN 10305-3 Steel Tubes for Precision Applications-Welded Cold Sized Tubes 15 EN 10305-6 Steel Tubes for Precision Applications-Welded Cold Drawn Tubes for Hydraulic and Pneumatic Power Systems 16 DIN 30670 Polyethylene Coatings on Steel Pipes and Fittings
Low temperature steel pipe refers to the steel pipe used in low temperature environment below -10. The steel usually used at low temperature of -10~-196 is called low temperature steel, and the steel used at low temperature below -196 is called ultra-low temperature steel, which has enough notch toughness. Low temperature steel pipe is mainly used in the production of ethylene, propylene, urea, synthetic ammonia, compound chemical fertilizer and washing, purification, desulphurization and degreasing in pharmaceutical industry with petroleum, chemical, natural gas and coal as raw materials, as well as cryogenic equipment manufacturing, ultra-low temperature cold storage, transportation of ultra-low temperature liquefied gas pipeline and its pipe components. High temperature steel pipe is the steel pipe used in high temperature environment. This kind of steel pipe needs to have certain high temperature resistance, will not decline in high temperature environment, but also has certain corrosion resistance.High temperature steel pipe is often used in exhaust pipe, heat treatment furnace, heat switch, incinerator and other pipeline projects that require heat resistance, because the medium in chemical pipeline, power plant boiler pipeline is mostly some high temperature gas, liquid, some also have certain corrosion. 1 ASTM A106 Seamless Carbon Steel Pipe for High Temperature Service 2 ASTM A268 Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service 3 ASTM A269 Seamless and Welded Austenitic Stainless Steel Tubing for General Service 4 ASTM A312 Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes 5 ASTM A333 Seamless and Welded Steel Pipe for Low Temperature Service 6 ASTM A334 Seamless and Welded Carbon and Alloy Steel Tubes for Low Temperature Service 7 ASTM A335 Seamless Ferritic Alloy-Steel Pipe for High Temperature Service 8 ASTM A358 Electric-Fusion-Welded Austenitic Chromium-Nickel Stainless Steel Pipe 9 ASTM A376 Seamless Austenitic Steel Pipe for High Temperature Service 10 ASTM A409 Welded Large Diameter Austenitic Steel Pipe for Corrosive or High Temperature Service 11 EN 10216-2&4 Seamless Steel Tubes for Pressure Purposes with Specified Elevated and Low Temperature Properties 12 EN 10217-2&4&5&6 Welded Steel Tubes for Pressure Purposes with Specificated Elevated and Low Temperature Properties 13 JIS G3456 Carbon and Alloy Steel Pipes for High Temperature Service 14 JIS G3458 Alloy Steel Pipes for High Temperature Sevice 15 JIS G3459 Stainless Steel Pipes for Corrosion Resistance and Low&High Temperature Service 16 JIS G3460 Carbon and Alloy Steel Pipes for Low Temperature Service 17 JIS G3464 Steel Heat Exchanger Tubes for Low Temperature Service 18 GB/T 18984 Seamless Steel Pipes for Low Temperature Service Piping 19 GB/T 32970 Longitudinal Submerged-Arc Welded Steel Pipe for High Pressure Service at High Temperatures
Item Hot Dipped Galvanized Round Steel Pipe/GI Pipe/Galvanised Tube OD 20~405mm in theory Thickness 1.2~15.7mm Length Any Length Below 16 Meter Standard GB,ASTM,BS,EN,JIS Material Chinese Grade, Q195, Q215 Q235, Q345 ASTM, Grade B,Grade C,Grade D,Grade 50 EN, S185,S235JR,S235JO,E335,S355JR,S355J2 JIS, SS330,SS400,SPFC590 Application Used For Water, Gas, Stream, Combustible Fluids And Other Liquid Delivery Ends Plain, Beveled, Thread With Couplings Or Sockets; Plastic Caps And Steel Rings Can Be Provided If Possible Surface Bared, Galvanized, Oiled, Color Paint, 3PE; Or Other Anti-corrosive Treatment Technique Hot Rolled Or Cold Rolled ERW Package Covered With Tarpaulin, Containers Or In Bulk
Item Hot Dipped Galvanized Round Steel Pipe/GI Pipe/Galvanised Tube OD 20~405mm in theory Thickness 1.2~15.7mm Length Any Length Below 16 Meter Standard GB,ASTM,BS,EN,JIS Material Chinese Grade, Q195, Q215 Q235, Q345 ASTM, Grade B,Grade C,Grade D,Grade 50 EN, S185,S235JR,S235JO,E335,S355JR,S355J2 JIS, SS330,SS400,SPFC590 Application Used For Water, Gas, Stream, Combustible Fluids And Other Liquid Delivery Ends Plain, Beveled, Thread With Couplings Or Sockets; Plastic Caps And Steel Rings Can Be Provided If Possible Surface Bared, Galvanized, Oiled, Color Paint, 3PE; Or Other Anti-corrosive Treatment Technique Hot Rolled Or Cold Rolled ERW Package Covered With Tarpaulin, Containers Or In Bulk
