When choosing the right pipeline pipe for oil and gas transmission, reliability under extreme conditions defines every decision. Our range includes Oil and gas sector welded stainless steel tube engineered to handle corrosive sour gas, high-pressure crude, and subsea depths without compromise. For upstream gathering lines and refinery transfer systems, the Stainless welded tubing for petroleum industry provides consistent wall thickness and fusion integrity that prevents leak paths over decades of service. Downstream distribution networks rely on Gas delivery stainless steel welded pipe with precise dimensional tolerance to maintain flow efficiency and reduce pumping costs. For critical instrumentation and chemical injection lines, the Petroleum grade stainless welded conduit offers the metallurgical purity needed to resist pitting and chloride stress corrosion. Every heat lot undergoes full traceability and non-destructive testing before shipment.
Our Stainless Steel Pipeline Pipe is manufactured from dual-certified 304/304L and 316/316L austenitic stainless steel, with optional duplex grades such as 2205 and 2507 for elevated chloride environments. The longitudinal seam is welded using autogenous TIG or plasma keyhole processes followed by full-body solution annealing and rapid quench to restore intergranular corrosion resistance. Each pipe segment undergoes eddy current or ultrasonic testing per ASTM E213 and liquid penetrant inspection of the weld bead. Inside diameter surface roughness is controlled to Ra ≤ 1.6 µm for low-friction flow characteristics. Beveled ends at 30° ±2.5° are standard, with plain, threaded, or flanged ends available upon request. Marking includes heat number, material grade, schedule, hydrostatic test pressure, and NACE MR0175/ISO 15156 compliance where applicable.
| Nominal Pipe Size (NPS) | Outer Diameter (inch) | Wall Thickness Schedule 10S (inch) | Wall Thickness Schedule 40S (inch) | Wall Thickness Schedule 80S (inch) |
|---|---|---|---|---|
| 1/2″ | 0.840 | 0.083 | 0.109 | 0.147 |
| 3/4″ | 1.050 | 0.083 | 0.113 | 0.154 |
| 1″ | 1.315 | 0.109 | 0.133 | 0.179 |
| 2″ | 2.375 | 0.109 | 0.154 | 0.218 |
| 3″ | 3.500 | 0.120 | 0.216 | 0.300 |
| 4″ | 4.500 | 0.120 | 0.237 | 0.337 |
| 6″ | 6.625 | 0.134 | 0.280 | 0.432 |
| 8″ | 8.625 | 0.148 | 0.322 | 0.500 |
| 10″ | 10.750 | 0.165 | 0.365 | 0.593 |
| 12″ | 12.750 | 0.180 | 0.406 | 0.687 |
| Grade | Tensile Strength (ksi) | Yield Strength (ksi) | Elongation (%) | Cr (%) | Ni (%) | Mo (%) | PREN min |
|---|---|---|---|---|---|---|---|
| TP304/304L | 75 | 30 | 35 | 18.0–20.0 | 8.0–12.0 | – | 18 |
| TP316/316L | 75 | 30 | 35 | 16.0–18.0 | 10.0–14.0 | 2.0–3.0 | 24 |
| 2205 duplex | 95 | 65 | 25 | 22.0–23.0 | 4.5–6.5 | 3.0–3.5 | 34 |
| 2507 super duplex | 116 | 80 | 15 | 24.0–26.0 | 6.0–8.0 | 3.0–5.0 | 41 |
Standard random lengths are 20 ft (6.1 m) with double random lengths up to 40 ft (12.2 m) available for mainline applications. Cut-to-length services with orbital cutting and end finishing hold a dimensional tolerance of ±1/32″. Protective end caps and vapor-phase inhibitor packaging are applied for maritime transit, ensuring arrival condition matches mill certification. Documentation packages include material test reports, PMI results, and radiographic film copies as specified by project QA/QC requirements.
