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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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▇ ▍ What is Welded Steel Pipe
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.
Product: | ERW (Electric Resistance Welded ) Steel Pipe, HFW Pipe, ERW Black Pipe |
Application: | Used for Oil/Gas/Water transmission,Machinery Manufacturing |
Size: | OD: 21.3-660mm |
WT: 1.0-20mm | |
LENGTH: 5.8/6/11.8/12m | |
Pipe Standard: | API 5L PSL1/PSL2 Gr.A,Gr.B,X42,X46,X52,X56,X60,X65,X70 |
ASTM A53/A252/A500/A178/A135 | |
EN10210/EN10219/EN10217/EN10208/EN10297 | |
JIS G3441/G3444/G3445/G3452/G3454/G3456 | |
BS1387/AS1163 |
▇ ▍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.
Product: | LSAW pipe,EFW Pipe |
Application: | Used for oil/gas/water Transmission,Engineering/Offshore projects. |
Size: | OD: 219mm-1625mm |
WT: 7-50mm | |
LENGTH: 5.8/6/11.8/12m | |
Pipe Standard: | API 5L PSL1/PSL2 Gr.A,Gr.B,X42,X46,X52,X56,X60,X65,X70 |
ASTM A53/A252/A500/A672/A691/A139 | |
EN10210/EN10219/EN10217/EN10208/EN10297 | |
AS1163/JIS G3457 |
▇ ▍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: | SSAW Pipe, SAWH Pipe, Spiral Steel Pipe |
Application: | Used for Oil/Gas/Water transmission,Construction & Structure Parts |
Size: | OD: 219mm-4064mm |
WT: 3.2-40mm | |
LENGTH: 5.8/6/11.8/12m | |
Pipe Standard: | API 5L PSL1/PSL2 Gr.A,Gr.B,X42,X46,X52,X56,X60,X65,X70 |
ASTM A53/A252/A500 | |
EN10219/EN10208/EN10297 | |
JIS G3457 |
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 |
Chemical Composition and Mechanical Properties of LSAW Steel Pipe
| Standard | Grade | Chemical Composition(max)% | Mechanical Properties(min) | |||||
| C | Mn | Si | S | P | Yield Strength(Mpa) | Tensile Strength(Mpa) | ||
| GB/T700-2006 | A | 0.22 | 1.4 | 0.35 | 0.050 | 0.045 | 235 | 370 |
| B | 0.2 | 1.4 | 0.35 | 0.045 | 0.045 | 235 | 370 | |
| C | 0.17 | 1.4 | 0.35 | 0.040 | 0.040 | 235 | 370 | |
| D | 0.17 | 1.4 | 0.35 | 0.035 | 0.035 | 235 | 370 | |
| GB/T1591-2009 | A | 0.2 | 1.7 | 0.5 | 0.035 | 0.035 | 345 | 470 |
| B | 0.2 | 1.7 | 0.5 | 0.030 | 0.030 | 345 | 470 | |
| C | 0.2 | 1.7 | 0.5 | 0.030 | 0.030 | 345 | 470 | |
| BS En10025 | S235JR | 0.17 | 1.4 | - | 0.035 | 0.035 | 235 | 360 |
| S275JR | 0.21 | 1.5 | - | 0.035 | 0.035 | 275 | 410 | |
| S355JR | 0.24 | 1.6 | - | 0.035 | 0.035 | 355 | 470 | |
| DIN 17100 | ST37-2 | 0.2 | - | - | 0.050 | 0.050 | 225 | 340 |
| ST44-2 | 0.21 | - | - | 0.050 | 0.050 | 265 | 410 | |
| ST52-3 | 0.2 | 1.6 | 0.55 | 0.040 | 0.040 | 345 | 490 | |
| JIS G3101 | SS400 | - | - | - | 0.050 | 0.050 | 235 | 400 |
| SS490 | - | - | - | 0.050 | 0.050 | 275 | 490 | |
| API 5L PSL1 | A | 0.22 | 0.9 | - | 0.03 | 0.03 | 210 | 335 |
| B | 0.26 | 1.2 | - | 0.03 | 0.03 | 245 | 415 | |
| X42 | 0.26 | 1.3 | - | 0.03 | 0.03 | 290 | 415 | |
| X46 | 0.26 | 1.4 | - | 0.03 | 0.03 | 320 | 435 | |
| X52 | 0.26 | 1.4 | - | 0.03 | 0.03 | 360 | 460 | |
| X56 | 0.26 | 1.1 | - | 0.03 | 0.03 | 390 | 490 | |
| X60 | 0.26 | 1.4 | - | 0.03 | 0.03 | 415 | 520 | |
| X65 | 0.26 | 1.45 | - | 0.03 | 0.03 | 450 | 535 | |
| X70 | 0.26 | 1.65 | - | 0.03 | 0.03 | 585 | 570 | |
▇ ▍ Dimension of Welded Steel Pipe
Dimension of ERW Steel Pipe
Dimension of LSAW Steel Pipe
Dimension of SSAW Steel Pipe
▇ ▍Application of Welded Steel Pipe
Welded steel pipes are commonly used in a wide range of applications and industries, including:
1）Water and wastewater transportation: Welded steel pipes are used to carry water, sewage, and other fluids in municipal and industrial plumbing systems.
2）Oil and gas pipelines: Welded steel pipes are utilized in the construction of pipelines for the transportation of oil, natural gas, and other hydrocarbons.
3）Structural applications: They are used in the construction of buildings, bridges, and other structures as structural support elements.
4）Automotive and transportation: Welded steel pipes are used in the manufacturing of automobile exhaust systems and chassis components.
5）Manufacturing and industrial processes: They are used in various manufacturing and industrial applications, including conveying materials and gases within factories.
6）Agriculture: Welded steel pipes are used for irrigation systems, drainage, and other agricultural applications.
▇ ▍Process
Process of ERW Steel Pipe
UOE Process Of LSAW Steel Pipe
JCOE Process of LSAW Steel Pipe
Process of SSAW Steel Pipe
▇ ▍ What is Welded Steel Pipe
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.
Product: | ERW (Electric Resistance Welded ) Steel Pipe, HFW Pipe, ERW Black Pipe |
Application: | Used for Oil/Gas/Water transmission,Machinery Manufacturing |
Size: | OD: 21.3-660mm |
WT: 1.0-20mm | |
LENGTH: 5.8/6/11.8/12m | |
Pipe Standard: | API 5L PSL1/PSL2 Gr.A,Gr.B,X42,X46,X52,X56,X60,X65,X70 |
ASTM A53/A252/A500/A178/A135 | |
EN10210/EN10219/EN10217/EN10208/EN10297 | |
JIS G3441/G3444/G3445/G3452/G3454/G3456 | |
BS1387/AS1163 |
▇ ▍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.
Product: | LSAW pipe,EFW Pipe |
Application: | Used for oil/gas/water Transmission,Engineering/Offshore projects. |
Size: | OD: 219mm-1625mm |
WT: 7-50mm | |
LENGTH: 5.8/6/11.8/12m | |
Pipe Standard: | API 5L PSL1/PSL2 Gr.A,Gr.B,X42,X46,X52,X56,X60,X65,X70 |
ASTM A53/A252/A500/A672/A691/A139 | |
EN10210/EN10219/EN10217/EN10208/EN10297 | |
AS1163/JIS G3457 |
▇ ▍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: | SSAW Pipe, SAWH Pipe, Spiral Steel Pipe |
Application: | Used for Oil/Gas/Water transmission,Construction & Structure Parts |
Size: | OD: 219mm-4064mm |
WT: 3.2-40mm | |
LENGTH: 5.8/6/11.8/12m | |
Pipe Standard: | API 5L PSL1/PSL2 Gr.A,Gr.B,X42,X46,X52,X56,X60,X65,X70 |
ASTM A53/A252/A500 | |
EN10219/EN10208/EN10297 | |
JIS G3457 |
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 |
Chemical Composition and Mechanical Properties of LSAW Steel Pipe
| Standard | Grade | Chemical Composition(max)% | Mechanical Properties(min) | |||||
| C | Mn | Si | S | P | Yield Strength(Mpa) | Tensile Strength(Mpa) | ||
| GB/T700-2006 | A | 0.22 | 1.4 | 0.35 | 0.050 | 0.045 | 235 | 370 |
| B | 0.2 | 1.4 | 0.35 | 0.045 | 0.045 | 235 | 370 | |
| C | 0.17 | 1.4 | 0.35 | 0.040 | 0.040 | 235 | 370 | |
| D | 0.17 | 1.4 | 0.35 | 0.035 | 0.035 | 235 | 370 | |
| GB/T1591-2009 | A | 0.2 | 1.7 | 0.5 | 0.035 | 0.035 | 345 | 470 |
| B | 0.2 | 1.7 | 0.5 | 0.030 | 0.030 | 345 | 470 | |
| C | 0.2 | 1.7 | 0.5 | 0.030 | 0.030 | 345 | 470 | |
| BS En10025 | S235JR | 0.17 | 1.4 | - | 0.035 | 0.035 | 235 | 360 |
| S275JR | 0.21 | 1.5 | - | 0.035 | 0.035 | 275 | 410 | |
| S355JR | 0.24 | 1.6 | - | 0.035 | 0.035 | 355 | 470 | |
| DIN 17100 | ST37-2 | 0.2 | - | - | 0.050 | 0.050 | 225 | 340 |
| ST44-2 | 0.21 | - | - | 0.050 | 0.050 | 265 | 410 | |
| ST52-3 | 0.2 | 1.6 | 0.55 | 0.040 | 0.040 | 345 | 490 | |
| JIS G3101 | SS400 | - | - | - | 0.050 | 0.050 | 235 | 400 |
| SS490 | - | - | - | 0.050 | 0.050 | 275 | 490 | |
| API 5L PSL1 | A | 0.22 | 0.9 | - | 0.03 | 0.03 | 210 | 335 |
| B | 0.26 | 1.2 | - | 0.03 | 0.03 | 245 | 415 | |
| X42 | 0.26 | 1.3 | - | 0.03 | 0.03 | 290 | 415 | |
| X46 | 0.26 | 1.4 | - | 0.03 | 0.03 | 320 | 435 | |
| X52 | 0.26 | 1.4 | - | 0.03 | 0.03 | 360 | 460 | |
| X56 | 0.26 | 1.1 | - | 0.03 | 0.03 | 390 | 490 | |
| X60 | 0.26 | 1.4 | - | 0.03 | 0.03 | 415 | 520 | |
| X65 | 0.26 | 1.45 | - | 0.03 | 0.03 | 450 | 535 | |
| X70 | 0.26 | 1.65 | - | 0.03 | 0.03 | 585 | 570 | |
▇ ▍ Dimension of Welded Steel Pipe
Dimension of ERW Steel Pipe
Dimension of LSAW Steel Pipe
Dimension of SSAW Steel Pipe
▇ ▍Application of Welded Steel Pipe
Welded steel pipes are commonly used in a wide range of applications and industries, including:
1）Water and wastewater transportation: Welded steel pipes are used to carry water, sewage, and other fluids in municipal and industrial plumbing systems.
2）Oil and gas pipelines: Welded steel pipes are utilized in the construction of pipelines for the transportation of oil, natural gas, and other hydrocarbons.
3）Structural applications: They are used in the construction of buildings, bridges, and other structures as structural support elements.
4）Automotive and transportation: Welded steel pipes are used in the manufacturing of automobile exhaust systems and chassis components.
5）Manufacturing and industrial processes: They are used in various manufacturing and industrial applications, including conveying materials and gases within factories.
6）Agriculture: Welded steel pipes are used for irrigation systems, drainage, and other agricultural applications.
▇ ▍Process
Process of ERW Steel Pipe
UOE Process Of LSAW Steel Pipe
JCOE Process of LSAW Steel Pipe
Process of SSAW Steel Pipe
