Baojing Steel supplies stainless steel welded pipes in a wide range of outside diameters, wall thicknesses, schedules and lengths, covering standard NPS/DN dimensions and customized metric sizes.
Large Diameter · Custom Wall Thickness · Custom Length · TIG / Laser / ERW
*OD Range: 6 mm–2000+ mm **
The actual maximum diameter depends on the production method, material, wall thickness and applicable standard.
| NPS | DN | Outside Diameter (mm) | Common Wall Thickness (mm) |
|---|---|---|---|
| 1/8" | DN6 | 10.3 | 1.0 / 1.2 / 1.5 / 2.0 |
| 1/4" | DN8 | 13.7 | 1.2 / 1.5 / 2.0 / 2.5 |
| 3/8" | DN10 | 17.1 | 1.2 / 1.5 / 2.0 / 2.5 |
| 1/2" | DN15 | 21.3 | 1.5 / 2.0 / 2.11 / 2.5 / 3.0 |
| 3/4" | DN20 | 26.7 | 1.5 / 2.0 / 2.11 / 2.5 / 3.0 |
| 1" | DN25 | 33.4 | 1.5 / 2.0 / 2.77 / 3.0 / 3.38 |
| 1-1/4" | DN32 | 42.2 | 1.5 / 2.0 / 2.77 / 3.0 / 3.56 |
| 1-1/2" | DN40 | 48.3 | 1.5 / 2.0 / 2.77 / 3.0 / 3.68 |
| 2" | DN50 | 60.3 | 1.5 / 2.0 / 2.77 / 3.0 / 3.91 / 5.54 |
| 2-1/2" | DN65 | 73.0 | 2.0 / 2.77 / 3.0 / 3.05 / 5.16 |
| 3" | DN80 | 88.9 | 2.0 / 3.05 / 3.38 / 5.49 / 7.62 |
| 3-1/2" | DN90 | 101.6 | 2.0 / 3.05 / 4.0 / 5.74 |
| 4" | DN100 | 114.3 | 2.0 / 3.05 / 3.6 / 4.0 / 6.02 / 8.56 |
| 5" | DN125 | 141.3 | 2.0 / 3.4 / 3.96 / 6.55 / 9.53 |
| 6" | DN150 | 168.3 | 2.0 / 3.4 / 3.96 / 4.5 / 7.11 / 10.97 |
| 8" | DN200 | 219.1 | 3.0 / 3.76 / 6.35 / 8.18 / 10.31 / 12.70 |
| 10" | DN250 | 273.0 | 3.4 / 4.19 / 6.35 / 9.27 / 12.70 / 15.09 |
| 12" | DN300 | 323.9 | 4.0 / 4.57 / 6.35 / 9.53 / 12.70 / 17.45 |
| 14" | DN350 | 355.6 | 4.78 / 6.35 / 7.92 / 11.13 / 15.09 / 19.05 |
| 16" | DN400 | 406.4 | 4.78 / 6.35 / 7.92 / 12.70 / 16.66 / 21.44 |
| 18" | DN450 | 457.2 | 4.78 / 6.35 / 7.92 / 14.27 / 19.05 / 23.83 |
| 20" | DN500 | 508.0 | 5.54 / 6.35 / 9.53 / 15.09 / 20.62 / 26.19 |
| 22" | DN550 | 558.8 | 6.35 / 9.53 / 12.70 / 15.88 / 22.23 / 28.58 |
| 24" | DN600 | 609.6 | 6.35 / 9.53 / 12.70 / 17.45 / 24.61 / 30.96 |
| 26" | — | 660.4 | 6.35 / 8 / 10 / 12 / 16 / 20 / 25 |
| 28" | — | 711.2 | 6.35 / 8 / 10 / 12 / 16 / 20 / 25 |
| 30" | — | 762.0 | 6.35 / 8 / 10 / 12 / 16 / 20 / 25 |
| 32" | DN800 | 812.8 | 8 / 10 / 12 / 16 / 20 / 25 |
| 36" | DN900 | 914.4 | 8 / 10 / 12 / 16 / 20 / 25 / 30 |
| 40" | DN1000 | 1016.0 | 8 / 10 / 12 / 16 / 20 / 25 / 30 |
| 42" | DN1050 | 1066.8 | 10 / 12 / 16 / 20 / 25 / 30 |
| 48" | DN1200 | 1219.2 | 10 / 12 / 16 / 20 / 25 / 30 |
| 52" | DN1300 | 1320.8 | 10 / 12 / 16 / 20 / 25 / 30 |
| 56" | DN1400 | 1422.4 | 10 / 12 / 16 / 20 / 25 / 30 |
| 60" | DN1500 | 1524.0 | 12 / 16 / 20 / 25 / 30 / 35 |
| 64" | DN1600 | 1625.6 | 12 / 16 / 20 / 25 / 30 / 35 |
| 72" | DN1800 | 1828.8 | 12 / 16 / 20 / 25 / 30 / 40 |
| 80" | DN2000 | 2032.0 | 16 / 20 / 25 / 30 / 40 |
Note: Wall thickness combinations are representative. Actual availability depends on the grade, welding method, applicable standard, diameter and production capability.
For customers requiring metric dimensions, welded pipes can be supplied according to OD × WT × Length.
| OD (mm) | Common Wall Thickness (mm) |
|---|---|
| 10 | 1.0 / 1.2 / 1.5 / 2.0 |
| 12 | 1.0 / 1.2 / 1.5 / 2.0 |
| 16 | 1.0 / 1.5 / 2.0 / 2.5 |
| 20 | 1.0 / 1.5 / 2.0 / 2.5 / 3.0 |
| 25 | 1.2 / 1.5 / 2.0 / 2.5 / 3.0 |
| 30 | 1.5 / 2.0 / 3.0 |
| 32 | 1.5 / 2.0 / 3.0 / 4.0 |
| 38 | 1.5 / 2.0 / 3.0 / 4.0 |
| 40 | 2.0 / 3.0 / 4.0 |
| 42 | 2.0 / 3.0 / 4.0 |
| 45 | 2.0 / 3.0 / 4.0 / 5.0 |
| 48 | 2.0 / 3.0 / 4.0 / 5.0 |
| 50 | 2.0 / 3.0 / 4.0 / 5.0 |
| 60 | 2.0 / 3.0 / 4.0 / 5.0 / 6.0 |
| 63 | 2.0 / 3.0 / 4.0 / 5.0 / 6.0 |
| 76 | 2.0 / 3.0 / 4.0 / 5.0 / 6.0 / 8.0 |
| 80 | 2.0 / 3.0 / 4.0 / 5.0 / 6.0 / 8.0 |
| 89 | 3.0 / 4.0 / 5.0 / 6.0 / 8.0 / 10.0 |
| 100 | 3.0 / 4.0 / 5.0 / 6.0 / 8.0 / 10.0 |
| 108 | 3.0 / 4.0 / 5.0 / 6.0 / 8.0 / 10.0 |
| 114 | 3.0 / 4.0 / 5.0 / 6.0 / 8.0 / 10.0 / 12.0 |
| 121 | 3.0 / 4.0 / 5.0 / 6.0 / 8.0 / 10.0 / 12.0 |
| 133 | 3.0 / 4.0 / 5.0 / 6.0 / 8.0 / 10.0 / 12.0 |
| 140 | 4.0 / 5.0 / 6.0 / 8.0 / 10.0 / 12.0 |
| 159 | 4.0 / 5.0 / 6.0 / 8.0 / 10.0 / 12.0 / 15.0 |
| 168 | 4.0 / 5.0 / 6.0 / 8.0 / 10.0 / 12.0 / 16.0 |
| 180 | 4.0 / 5.0 / 6.0 / 8.0 / 10.0 / 12.0 / 16.0 |
| 200 | 4.0 / 5.0 / 6.0 / 8.0 / 10.0 / 12.0 / 16.0 |
| 219 | 5.0 / 6.0 / 8.0 / 10.0 / 12.0 / 16.0 / 20.0 |
| 245 | 5.0 / 6.0 / 8.0 / 10.0 / 12.0 / 16.0 / 20.0 |
| 273 | 6.0 / 8.0 / 10.0 / 12.0 / 16.0 / 20.0 / 25.0 |
| 325 | 6.0 / 8.0 / 10.0 / 12.0 / 16.0 / 20.0 / 25.0 |
| 355 | 6.0 / 8.0 / 10.0 / 12.0 / 16.0 / 20.0 / 25.0 |
| 406 | 6.0 / 8.0 / 10.0 / 12.0 / 16.0 / 20.0 / 25.0 |
| 457 | 8.0 / 10.0 / 12.0 / 16.0 / 20.0 / 25.0 / 30.0 |
| 508 | 8.0 / 10.0 / 12.0 / 16.0 / 20.0 / 25.0 / 30.0 |
| 559 | 8.0 / 10.0 / 12.0 / 16.0 / 20.0 / 25.0 / 30.0 |
| 610 | 8.0 / 10.0 / 12.0 / 16.0 / 20.0 / 25.0 / 30.0 |
| 660 | 10.0 / 12.0 / 16.0 / 20.0 / 25.0 / 30.0 |
| 711 | 10.0 / 12.0 / 16.0 / 20.0 / 25.0 / 30.0 |
| 762 | 10.0 / 12.0 / 16.0 / 20.0 / 25.0 / 30.0 |
| 813 | 10.0 / 12.0 / 16.0 / 20.0 / 25.0 / 30.0 |
| 914 | 10.0 / 12.0 / 16.0 / 20.0 / 25.0 / 30.0 |
| 1016 | 10.0 / 12.0 / 16.0 / 20.0 / 25.0 / 30.0 |
| 1219 | 12.0 / 16.0 / 20.0 / 25.0 / 30.0 / 35.0 |
| 1422 | 12.0 / 16.0 / 20.0 / 25.0 / 30.0 / 35.0 |
| 1524 | 12.0 / 16.0 / 20.0 / 25.0 / 30.0 / 35.0 / 40.0 |
| 1626 | 16.0 / 20.0 / 25.0 / 30.0 / 35.0 / 40.0 |
| 1829 | 16.0 / 20.0 / 25.0 / 30.0 / 35.0 / 40.0 |
| 2032 | 16.0 / 20.0 / 25.0 / 30.0 / 35.0 / 40.0 |
For projects using ASME / ASTM NPS dimensions, welded stainless steel pipes can be specified by NPS + Schedule.
SCH 5S · SCH 10S · SCH 10 · SCH 20 · SCH 40S · SCH 40 · SCH 60 · SCH 80S · SCH 80 · SCH 100 · SCH 120 · SCH 140 · SCH 160 · XXS
For stainless steel piping, the most frequently requested schedules include:
Examples:
304L Welded Pipe – NPS 2" – SCH 10S
316L Welded Pipe – NPS 4" – SCH 40S
2205 Duplex Welded Pipe – NPS 8" – SCH 40S
2507 Super Duplex Welded Pipe – NPS 12" – SCH 40S
One of the major advantages of welded pipe is its suitability for large-diameter applications.
Typical large-diameter sizes include:
| Nominal Size | OD |
|---|---|
| 24" | 609.6 mm |
| 30" | 762.0 mm |
| 36" | 914.4 mm |
| 40" | 1016.0 mm |
| 48" | 1219.2 mm |
| 52" | 1320.8 mm |
| 56" | 1422.4 mm |
| 60" | 1524.0 mm |
| 64" | 1625.6 mm |
| 72" | 1828.8 mm |
| 80" | 2032.0 mm |
Larger diameters can be considered according to material, wall thickness, welding process and applicable standard.
Typical supply lengths include:
5–7 m · 6–7.5 m · 10–12 m
Common customer requirements:
3 m · 4 m · 5 m · 6 m · 8 m · 10 m · 11.8 m · 12 m
Examples:
3,000 mm · 6,000 mm · 9,000 mm · 10,000 mm · 11,800 mm · 12,000 mm
Special lengths can be supplied depending on diameter, wall thickness, material and applicable standard.
304 Welded Pipe 25.4 × 1.5 × 6000 mm
304L Welded Pipe 48.3 × 2.77 × 6000 mm
316L Welded Pipe 60.3 × 3.91 × 6000 mm
316L Welded Pipe 114.3 × 3.05 × 6000 mm
321 Welded Pipe 168.3 × 4.5 × 6000 mm
316L Welded Pipe 219.1 × 6.35 × 6000 mm
2205 Duplex Welded Pipe 273 × 8 mm × 6000 mm
2507 Super Duplex Welded Pipe 323.9 × 10 mm × 6000 mm
316L Welded Pipe 508 × 10 mm × 12000 mm
304L Large Diameter Welded Pipe 1016 × 12 mm × 12000 mm
Welded stainless steel pipes can be supplied with thin, medium and heavy wall thicknesses according to application requirements.
1.0–3.0 mm
Common applications:
Heat Exchangers · Food Equipment · Pharmaceutical · Decorative · Precision Applications
3.0–10.0 mm
Common applications:
Industrial Piping · Chemical · Water Treatment · Process Piping
10–40+ mm
Common applications:
Large-Diameter Piping · Pressure Equipment · Heavy Industrial Applications · Structural Applications
Actual available thickness depends on OD, grade, welding method and applicable standard.
Suitable for high-quality stainless steel welded tubes and pipes requiring precise weld control.
High-precision welding with a narrow heat-affected zone, suitable for precision applications.
Efficient production method for selected stainless steel pipe sizes and applications.
Automated welding systems provide consistent weld quality and repeatability for larger production volumes.
Depending on customer requirements:
Visual Inspection · Dimensional Inspection · PMI · Eddy Current · UT · RT / X-Ray · Hydrostatic Testing
Tensile Test · Yield Strength · Elongation · Hardness · Flattening Test · Bend Test · Hydrostatic Test · IGC Test
ASTM A312 / ASME SA312
Austenitic stainless steel pipe
ASTM A358 / ASME SA358
Electric-fusion-welded austenitic stainless steel pipe
ASTM A269
Austenitic stainless steel tubing
ASTM A789 / ASME SA789
Duplex stainless steel tubing
ASTM A790 / ASME SA790
Duplex stainless steel pipe
EN 10217 · EN 10296
JIS G3459 · JIS G3468
GB/T 12771 · GB/T 21833
If your required OD, wall thickness, length or grade is not listed above, send us your specification or drawing.
Baojing Steel can check the suitable production route, applicable standard and available dimensions for your project.
