Steel pipes for water system transmissions, oil and gas conveyance, infrastructure projects, piling industries, casing piles, and marine and port works.
LONGITUDINAL SUBMERGED ARC WELDING (LSAW)
Longitudinal Submerged Arc Welding is a specific welding technique used in pipe production where the finished product requires a particularly high wall thickness due to high internal or external pressures.
When operational conditions require high wall thickness due to high internal or external pressures, LSAW (Longitudinal Submerged Arc Welding) pipes are commonly the most economical solution. Good performances on high pressure resistance, and low-temperature corrosion resistance.
Inspection: Chemical Component Analysis, Mechanical Properties (Ultimate tensile strength, Yield strength, Elongation), Technical Properties (Flattening Test, Bending Test, Blow Test, Impact Test), Exterior Size Inspection, Hydrostatic Test, X-ray Test.
| Standard | API 5L, API 5CT, ASTM 53, EN10217, DIN 2458. IS 3589, GB/T3091, GB/T9711 |
|---|---|
| Grades | API 5L: GR B, X42, X46, X56, X60, X65,X70 ASTM A53: GR A, GR B, GR C EN: S275, S275JR, S355JRH, S355J2H GB: Q195, Q215, Q235, Q345, L175, L210, L245, L320, L360- L555 |
| Size | 219.1mm -1820mm (8” -72”) OD 5mm – 50mm Wall thickness |
SPIRAL SUBMERGED ARC WELDING (SSAW)
SSAW steel pipe, also known as spiral submerged arc welded steel pipe, is a spiral welded steel pipe produced by double-sided submerged arc welding. Spiral welded pipes are formed using narrower sheets or hot rolled coils, which greatly reduces their production costs. The spiral welding process allows the production of large diameter pipes suitable for transporting large quantities of oil and gas and for infrastructure projects, piling industries, casing piles, marine and port works.
| Standard | ASTM A252, ASTM A53, EN10219, EN10210, API 5L, EN 10208-2, ISO 3183, EN 10224, EN 10217-1, ASTM A.134 |
|---|---|
| Grades | API 5L: GR B, X42, X46, X56, X60, X65, X70 ASTM A53: GR A, GR B, GR C EN: S275, S275JR, S355JRH, S355J2H, S355JR |
| Size | 406,4mm -3200mm OD 8mm – 26mm Wall thickness |
SEAMLESS STEEL PIPE
Seamless steel tubes and pipes are made from round steel billets. After heating, a hollow tube will be formed by cold drawing or hot expanding. Due to this special process, the seamless steel pipe does not have any joints created during the manufacturing process.
| Standard | API / ASTM / EN / JIS / STP etc. |
|---|---|
| Grades | API 5L GR. B, X80 PSL1 PSL2, API 5CT J55, P110 ASTM A53 GR. A GR. B / A106 GR. A GR. B GR.C /A333 GR.1 GR.6 A210 GR. A GR.C / A192 / A179 / A213 T11-T91 / ASTM A335 P11-P92 C250 / C250LO / C350 / C350LO / C450 / C450LO EN10297 / 10210 / 10216-1 / 10216-2 E235-38Mn6, S235JRH-S355K2H, P195TR1-P265TR2, P195GH-P265GH JIS G3454 3455 3456 3445 3461 3462 STPG370, STS370, STPT370, STKM11A-STKM14C, STB340-STB510 , STBA12-STBA24 |
| Size | Outside Diameter: 21.3-1200mm Wall Thickness: 1.5-200mm |
ERW/HFW PIPES
ERW pipe is the acronym for electrical resistance welded steel pipe, and HFW pipe represents high-frequency welding (HFW) steel pipe & tube. The pipes are made from steel coil and the weld seam runs parallel to the pipe. And it is one of the most versatile tools in agriculture, industry, and construction activities. The manufacturing process of ERW steel pipe includes HFW. ERW involves low, medium, and high-frequency welding, while HFW is especially for high frequency electric resistance welding pipe.
| PARAMETER OF ERW/HFW PIPES | |
|---|---|
| Grades | API 5L GR. B, X80 PSL1 PSL2 AS1163 / 1074, BS1387, ISO65, JIS G3444 / 3445 / 3454 / 3452 API 5CT H40 J55 K55 L80-1 N80 P110 ASTM A53 GR. A / GR.B, A252 GR.1 / GR.2 / GR.3 C250 / C250LO / C350 / C350LO / C450 / C450LO EN10219 / 10210 / 10217 / 10255 P195GH / P235GH / P265GH STK290-STK540, STKM11A-STKM14C, STPG370 / STPG410 / S195T S235JRH, S275JRH, S275J0H, S275J2H, S355J0H, S355J2H, S355K2H |
| Size | Outside Diameter: 21.3-1200mm Wall Thickness: 1.5-200mm |
