Products · Pipes · Welded
LSAW & SSAW welded pipe.
Large-diameter welded pipe — longitudinal submerged-arc (LSAW), spiral submerged-arc (SSAW / SAWH), and high-frequency welded (HFW) — for oil, gas, water, and structural service to GB, API/ASTM, and EN standards.
01 / LSAW · SAW
LSAW — Longitudinal Submerged-Arc Welded Pipe
Submerged-arc welded steel pipe with high weld quality and high production efficiency — widely used in petroleum, natural gas, chemical, construction, and various large steel-structure projects.
3 options — tap a button to switch
Option 1 of 3
LSAW — US Standards
埋弧焊钢管 · 美标
- Standards
- API 2BASTM A671 / A672API 5L (PSL1 / PSL2)
- Size range
- OD 406–1422 mm · Wall thickness 8–50 mm
Grades by standard
| Application / standard | Grades |
|---|---|
| Steel structure · API 2B | Q235B/C/D · Q355B/C/D |
| Mid-/high-temperature vessel · ASTM A671 / A672 | Gr.B60 · Gr.B65 · Gr.B70 · Gr.C55 · Gr.C60 · Gr.C65 · Gr.C75 · Gr.CB60 · Gr.CB65 · Gr.CB70 · Gr.CC60 · Gr.CC65 · Gr.CC70 |
| Oil & gas (PSL1/PSL2) · API 5L | L245(N/M) · L290/X42(N/M) · L320/X46(N/M) · L360/X52(N/M) · L390/X56(N/M) · L415/X60(N/M) · L450/X65(N/M) · L485/X70(N/M) · L555/X80(N/M) |
Option 2 of 3
LSAW — European Standards
埋弧焊钢管 · 欧标
- Standards
- EN 10217EN 10219EN 10210
- Size range
- OD 406–1422 mm · Wall thickness 8–50 mm
Grades by standard
| Application / standard | Grades |
|---|---|
| Fluid transport · EN 10217 | P235GH · P265GH |
| Steel structure · EN 10219 | S235JRH/J0H/J2H · S275JRH/J0H/J2H · S355JRH/J0H/J2H · S355K2H · S420MH · S460MH |
| Steel structure · EN 10210 | S235JRH/J0H/J2H · S275JRH/J0H/J2H · S355JRH/J0H/J2H · S355K2H · S355NH · S420NH · S460NH |
Option 3 of 3
LSAW — GB Standards
埋弧焊钢管 · 国标
- Standards
- GB/T 3091-2018GB/T 30063-2013GB/T 9711-2017 (PSL1 / PSL2)
- Size range
- OD 406–1422 mm · Wall thickness 8–50 mm
Grades by standard
| Application / standard | Grades |
|---|---|
| Low-pressure fluid · GB/T 3091-2018 | Q235B/C/D · Q355B/C/D |
| Steel structure · GB/T 30063-2013 | Q235B/C/D · Q355B/C/D · Q390B/C/D · Q420B/C/D · Q345GJ(B/C/D) · Q390GJ(B/C/D) · Q420GJ(B/C/D) · Q460GJ(B/C/D) |
| Oil & gas (PSL1/PSL2) · GB/T 9711-2017 | L245(N/M) · L290/X42(N/M) · L320/X46(N/M) · L360/X52(N/M) · L390/X56(N/M) · L415/X60(N/M) · L450/X65(N/M) · L485/X70(N/M) · L555/X80(N/M) |
02 / SSAW · SAWH
SSAW — Spiral Submerged-Arc Welded Pipe
Spiral (helical) submerged-arc welded pipe for oil, gas, water, thermal, and low-pressure fluid transmission, and structural service.
Spiral submerged-arc welded pipe produced to American Standard ASME B36.10.
- Standards
- ASME B36.10API 5L (PSL1 / PSL2)EN 10217EN 10219
- Size range
- OD 219–3500 mm · Wall thickness 6–25.4 mm · Length 6–12 m
- Main grades
- Q195 – Q345L210 – L690A – X100
What we can do
- Production specification range per ASME B36.10 — available wall thickness varies with outer diameter.
- Supplied as API 5L PSL1/PSL2 line pipe and EN 10217 / EN 10219 welded pipe.
03 / HFW · ERW
HFW — High-Frequency Welded Pipe
High-frequency resistance-welded longitudinal pipe — welded by the heat generated from high-frequency current for a high-quality weld and a smooth pipe body; used for various fluid transport and structural support.
Steel pipe welded using heat generated by high-frequency current — high weld quality and a smooth pipe body, suitable for various fluid transport and structural support.
- Standards
- ASTM A53EN 10210API 5LGB/T 3091-2015GB/T 13793-2016GB/T 9711-2011
- Size range
- OD Φ76–Φ630 mm · Wall thickness 2.5–22 mm
- Main grades
- Q235B/C/DQ355B/C/DQ390B/C/DQ420B/C/DL245ML290ML360ML390MS235S275 (JRH/J0H/J2H)S355 (JRH/J0H/J2H)S355K2H/NHS420/460 (NH/MH)P235TR1/TR2P265TR1/TR2P235GHP265GH
Size range — HFW longitudinal welded pipe
| Outer diameter (mm) | Wall thickness (mm) |
|---|---|
| Φ76 | 2.5–8 |
| Φ89 | 2.5–8 |
| Φ114 | 3–10 |
| Φ133 | 3–12 |
| Φ140 | 3–12 |
| Φ152 | 4–12 |
| Φ159 | 4–12 |
| Φ165 | 4–14 |
| Φ168 | 4–14 |
| Φ180 | 4–14 |
| Φ194 | 4–14 |
| Φ203 | 4–14 |
| Φ219 | 4–16 |
| Φ245 | 4–16 |
| Φ273 | 4–16 |
| Φ299 | 4–18 |
| Φ325 | 5–18 |
| Φ351 | 5–16 |
| Φ377 | 5–18 |
| Φ406 | 6–14 |
| Φ426 | 6–18 |
| Φ480 | 7–18 |
| Φ508 | 7–20 |
| Φ610 | 7–22 |
| Φ630 | 7–22 |
04 / Hot-expanded · Custom
Hot-Expanded & Custom-Processed Pipe
Hot-expanded pipe plus made-to-order fabrication — processed to customer requirements, including welding to specific shapes, cutting to length, and made-to-drawing production.
Customized processing per customer requirements — e.g. welding into specific shapes, cutting to different lengths, and made-to-drawing production.
- Standards
- Made-to-orderMade-to-drawing (来图定制)
What we can do
- Available forms: seamless pipe · longitudinal hot-expanded pipe · seamless hot-expanded pipe · hot-expanded pipe.
- 25 production lines online — toll/contract (来料) processing producing 230 × 4.08 mm to 820 × 18 mm and various non-standard sizes.
- Made-to-drawing fabrication: weld to specific shapes, cut to length, custom processing.
Welded pipe sourcing
Tell us your standard and grade.
Send standard, grade, OD, wall thickness, length, coating, and quantity. Our sales engineers reply within one business day with availability, lead time, and a firm quote.