Welded Steel Pipe,Electric Resistance Welded Pipe,Spiral Steel Pipe,Longitudinal Submerged Arc Welded Pipe
①ERW Steel Pipe: OD: 21.3mm ~ 660mm;WT: 1mm ~ 17.5mm; LENGTH: 0.5mtr ~ 22mtr ②LSAW Steel Pipe:OD: 406mm ~ 1422 mm;WT: 6.4mm ~ 44.5mm;LENGTH: 5mtr ~ 12mtr ③SSAW Steel Pipe:OD:219.1mm ~ 3500mm; WT: 6mm ~ 25mm (Up to 1'');LENGTH: 6mtr ~ 18mtr, SRL, DRL
ASTM A53, Grade A/B/C,API 5L,PSL1,PSL2,GR.B/X42-X80,ASTM A795,ASTM A135,ASTM A252,GR.1/2/3,AWWA C200
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▇ ▍ Description
Welded steel pipe is created using a flat steel plates or steel strips, and its manufacturing process creates seams in its body. Specifically, when welded steel pipes are manufactured, a steel plate or strip is bent and subsequently welded into either a circular, traditional pipe shape or a square shape.LSAW pipe, SSAW pipe and ERW pipe are all welded steel pipes and are classified based on the method of welding. For instance, LSAW pipe is welded longitudinally, and SSAW pipe is spiral-welded. ERW pipe is electric resistance welded, which results in a seam that runs parallel along the pipe body.
▇ ▍ERW Steel Pipe
High-frequency welded pipes are generally straight-slit, but straight-slit welded steel pipes are not necessarily high-frequency welded. The high-frequency straight-slit electric resistance welded steel pipe is formed by the skin effect and the proximity effect of the high-frequency current after the hot-rolled coil plate is formed by the molding machine, and the edge of the tube blank is heated and melted, and pressure welding is performed under the action of the pressing roller to realize the production. The high-frequency resistance welded steel pipe is different from the ordinary welded pipe welding process. The weld is made of the base material of the steel strip body, and the mechanical strength is better than that of the general welded pipe. The surface is smooth, high precision, low cost, and has low weld seam height, which is beneficial to the coating of 3PE anti-corrosion coating.
▇ ▍LSAW Steel Pipe
Longitudinal submerged arc welded is produced by using a single medium and thick plate as the raw material, pressing (rolling) the steel plate in a mold or forming machine into a tube blank, using double-sided submerged arc welding, and expanding the diameter. The steel plate feed amount can be automatically adjusted according to different steel grades, wall thicknesses, and plate widths. At the same time, the deformation compensation function effectively avoids the adverse effects of mold deformation on the forming and ensures the flatness of the full length of the steel plate during the pressing process. The feeding step is uniform during forming, ensuring the roundness of the tube blank and the flatness of the welding edge. The finished product has a wide range of specifications, and the weld has good toughness, plasticity, uniformity, and compactness. It has the advantages of large pipe diameter, pipe wall thickness, high-pressure resistance, low-temperature resistance, and strong corrosion resistance.
▇ ▍SSAW Steel Pipe
Spiral welded pipe(SSAW pipe, also called HSAW pipe). The pipe is formed by spiral submerged arc welding technology. Spiral welded pipes are formed using narrower plates or hot rolled coils, which lowers their production costs significantly. The welding line shape like a helix. The spiral welding process permits the production of large-diameter pipes suitable for transporting large volumes of oil and gas. Some SSAW pipes were historically limited to low-pressure applications.
Product Specification And Size
Product Name | Executive Standard | Dimension (mm) | Steel Code / Steel Grade |
Casting | API 5CT | Ø48.3~273 x WT2.77~11.43 | J55, K55, N80, L80 |
Tubing | API 5CT | Ø48.3~273 x WT2.77~11.43 | J55, K55, N80, L80, H40 |
Line Pipes | API 5L | Ø60.3~273.1 x WT2.77~12.7 | A25, A, B, X42, X46, X52, X56, X60, X65, X70, X80 |
Electric-Resistance-Welded Steel Pipes | ASTM A135 | Ø42.2~114.3 x WT2.11~2.63 | A |
ERW and Hot-dip Galvanized Steel Pipes | ASTM A53 | Ø21.3~273 x WT2.11~12.7 | A, B |
Pipes for Piling Usage | ASTM A252 | Ø219.1~508 x WT3.6~12.7 | Gr.2, Gr.3 |
Tubes for General Structural Purpose | ASTM A500 | Ø21.3~273 x WT2.11~12.7 | Gr.2, Gr.3 |
Square Pipes for General Structural Purpose | ASTM A500 | 25 x 25~160 x 160 x WT1.2~8.0 | Carbon Steel |
Threaded Steel Pipes | DIN 2440 | Ø21~164 x WT2.65~4.85 | Carbon Steel |
Screwed and Socketed Steel Tubes | BS 1387 | Ø21.4~113.9 x WT2~3.6 | Carbon Steel |
Scaffolding Pipes | EN 39 | Ø48.3 x WT3.2~4 | Carbon Steel |
Carbon Steel Tubes for General Structure Purpose | JIS G3444 | Ø21.7~216.3 x WT2.0~6.0 | Carbon Steel |
Carbon Steel Tubes for Machine Structure Purpose | JIS G3445 | Ø15~76 x WT0.7~3.0 | STKM11A, STKM13A |
Carbon Steel Pipes for Ordinary Piping | JIS G3452 | Ø21.9~216.3 x WT2.8~5.8 | Carbon Steel |
Carbon Steel Pipes for Pressure Service | JIS G3454 | Ø21.7~216.3 x WT2.8~7.1 | Carbon Steel |
Carbon Steel Rigid Steel Conduits | JIS G8305 | Ø21~113.4 x WT1.2~3.5 | G16~G104, C19~C75, E19~E75 |
Carbon Steel Rectangular Pipes for General Structure | JIS G3466 | 16 x 16~150 x 150 x WT0.7~6 | Carbon Steel |
▇ ▍ Dimension of Seamless Steel Pipe
Dimension of ERW Steel Pipe
Dimension of LSAW Steel Pipe
Dimension of SSAW Steel Pipe
▇ ▍Application
Water and Gas Transport
Welded steel pipe is excellent for transporting water, other fluids, and natural gas. Its affordable price makes it ideal for large-scale projects.
Pipe Casing
When drilled shafts are constructed, pipe casing (whether temporary or permanent) is needed, and welded steel pipe can be used for this purpose. When used as pipe casing, welded steel pipe adds support to a hole while construction in progress.
Bearing Piles
Welded steel pipe can be driven into the ground to help support and carry loads from big, heavy structures. When used as bearing piles, welded steel pipe may also be filled with concrete to boost strength.
Combi Walls
Welded steel pipe can be employed in the creation of combi walls, which serve as retaining structures. In combi walls, welded steel pipe is the king pile that is used in concert with steel sheet piles to form a strong, durable structure that can support significant loads.
Underground Utilities
Welded steel pipe can be used to assist when underground utilities are installed. When employed this way, hydraulic jacks drive sections of steel pipe between excavations, which are then conjoined with other sections of spliced pipe. Once the desired pipe structure is created, it is cleared and cleaned out to allow for a safe area for utility work.
Structural Sections
Welded steel pipe can be used to create large, open structures, including cofferdams. When used this way, it can offer an equal degree of bending resistance in every direction, which enables it to be resistant to buckling, even when substantially heavy loads are needing support across considerable lengths.
▇ ▍Process
Process of ERW Steel Pipe
UOE Process Of LSAW Steel Pipe
JCOE Process of LSAW Steel Pipe
Process of SSAW Steel Pipe
▇ ▍ Description
Welded steel pipe is created using a flat steel plates or steel strips, and its manufacturing process creates seams in its body. Specifically, when welded steel pipes are manufactured, a steel plate or strip is bent and subsequently welded into either a circular, traditional pipe shape or a square shape.LSAW pipe, SSAW pipe and ERW pipe are all welded steel pipes and are classified based on the method of welding. For instance, LSAW pipe is welded longitudinally, and SSAW pipe is spiral-welded. ERW pipe is electric resistance welded, which results in a seam that runs parallel along the pipe body.
▇ ▍ERW Steel Pipe
High-frequency welded pipes are generally straight-slit, but straight-slit welded steel pipes are not necessarily high-frequency welded. The high-frequency straight-slit electric resistance welded steel pipe is formed by the skin effect and the proximity effect of the high-frequency current after the hot-rolled coil plate is formed by the molding machine, and the edge of the tube blank is heated and melted, and pressure welding is performed under the action of the pressing roller to realize the production. The high-frequency resistance welded steel pipe is different from the ordinary welded pipe welding process. The weld is made of the base material of the steel strip body, and the mechanical strength is better than that of the general welded pipe. The surface is smooth, high precision, low cost, and has low weld seam height, which is beneficial to the coating of 3PE anti-corrosion coating.
▇ ▍LSAW Steel Pipe
Longitudinal submerged arc welded is produced by using a single medium and thick plate as the raw material, pressing (rolling) the steel plate in a mold or forming machine into a tube blank, using double-sided submerged arc welding, and expanding the diameter. The steel plate feed amount can be automatically adjusted according to different steel grades, wall thicknesses, and plate widths. At the same time, the deformation compensation function effectively avoids the adverse effects of mold deformation on the forming and ensures the flatness of the full length of the steel plate during the pressing process. The feeding step is uniform during forming, ensuring the roundness of the tube blank and the flatness of the welding edge. The finished product has a wide range of specifications, and the weld has good toughness, plasticity, uniformity, and compactness. It has the advantages of large pipe diameter, pipe wall thickness, high-pressure resistance, low-temperature resistance, and strong corrosion resistance.
▇ ▍SSAW Steel Pipe
Spiral welded pipe(SSAW pipe, also called HSAW pipe). The pipe is formed by spiral submerged arc welding technology. Spiral welded pipes are formed using narrower plates or hot rolled coils, which lowers their production costs significantly. The welding line shape like a helix. The spiral welding process permits the production of large-diameter pipes suitable for transporting large volumes of oil and gas. Some SSAW pipes were historically limited to low-pressure applications.
Product Specification And Size
Product Name | Executive Standard | Dimension (mm) | Steel Code / Steel Grade |
Casting | API 5CT | Ø48.3~273 x WT2.77~11.43 | J55, K55, N80, L80 |
Tubing | API 5CT | Ø48.3~273 x WT2.77~11.43 | J55, K55, N80, L80, H40 |
Line Pipes | API 5L | Ø60.3~273.1 x WT2.77~12.7 | A25, A, B, X42, X46, X52, X56, X60, X65, X70, X80 |
Electric-Resistance-Welded Steel Pipes | ASTM A135 | Ø42.2~114.3 x WT2.11~2.63 | A |
ERW and Hot-dip Galvanized Steel Pipes | ASTM A53 | Ø21.3~273 x WT2.11~12.7 | A, B |
Pipes for Piling Usage | ASTM A252 | Ø219.1~508 x WT3.6~12.7 | Gr.2, Gr.3 |
Tubes for General Structural Purpose | ASTM A500 | Ø21.3~273 x WT2.11~12.7 | Gr.2, Gr.3 |
Square Pipes for General Structural Purpose | ASTM A500 | 25 x 25~160 x 160 x WT1.2~8.0 | Carbon Steel |
Threaded Steel Pipes | DIN 2440 | Ø21~164 x WT2.65~4.85 | Carbon Steel |
Screwed and Socketed Steel Tubes | BS 1387 | Ø21.4~113.9 x WT2~3.6 | Carbon Steel |
Scaffolding Pipes | EN 39 | Ø48.3 x WT3.2~4 | Carbon Steel |
Carbon Steel Tubes for General Structure Purpose | JIS G3444 | Ø21.7~216.3 x WT2.0~6.0 | Carbon Steel |
Carbon Steel Tubes for Machine Structure Purpose | JIS G3445 | Ø15~76 x WT0.7~3.0 | STKM11A, STKM13A |
Carbon Steel Pipes for Ordinary Piping | JIS G3452 | Ø21.9~216.3 x WT2.8~5.8 | Carbon Steel |
Carbon Steel Pipes for Pressure Service | JIS G3454 | Ø21.7~216.3 x WT2.8~7.1 | Carbon Steel |
Carbon Steel Rigid Steel Conduits | JIS G8305 | Ø21~113.4 x WT1.2~3.5 | G16~G104, C19~C75, E19~E75 |
Carbon Steel Rectangular Pipes for General Structure | JIS G3466 | 16 x 16~150 x 150 x WT0.7~6 | Carbon Steel |
▇ ▍ Dimension of Seamless Steel Pipe
Dimension of ERW Steel Pipe
Dimension of LSAW Steel Pipe
Dimension of SSAW Steel Pipe
▇ ▍Application
Water and Gas Transport
Welded steel pipe is excellent for transporting water, other fluids, and natural gas. Its affordable price makes it ideal for large-scale projects.
Pipe Casing
When drilled shafts are constructed, pipe casing (whether temporary or permanent) is needed, and welded steel pipe can be used for this purpose. When used as pipe casing, welded steel pipe adds support to a hole while construction in progress.
Bearing Piles
Welded steel pipe can be driven into the ground to help support and carry loads from big, heavy structures. When used as bearing piles, welded steel pipe may also be filled with concrete to boost strength.
Combi Walls
Welded steel pipe can be employed in the creation of combi walls, which serve as retaining structures. In combi walls, welded steel pipe is the king pile that is used in concert with steel sheet piles to form a strong, durable structure that can support significant loads.
Underground Utilities
Welded steel pipe can be used to assist when underground utilities are installed. When employed this way, hydraulic jacks drive sections of steel pipe between excavations, which are then conjoined with other sections of spliced pipe. Once the desired pipe structure is created, it is cleared and cleaned out to allow for a safe area for utility work.
Structural Sections
Welded steel pipe can be used to create large, open structures, including cofferdams. When used this way, it can offer an equal degree of bending resistance in every direction, which enables it to be resistant to buckling, even when substantially heavy loads are needing support across considerable lengths.
▇ ▍Process
Process of ERW Steel Pipe
UOE Process Of LSAW Steel Pipe
JCOE Process of LSAW Steel Pipe
Process of SSAW Steel Pipe