When engineering a robust gas delivery network, material choice and weld integrity are paramount. Our Oil and gas sector welded stainless steel tube solutions are manufactured to sustain aggressive hydrocarbon media and fluctuating thermal cycles, ensuring zero-leak performance from the wellhead onward. For refinery transfer lines and chemical injection systems, we supply Stainless welded tubing for petroleum industry that resists pitting and chloride stress corrosion cracking. To meet the demands of high-volume, long-distance transport, our Pipeline pipe for oil and gas transmission is engineered with a smooth inner bead and consistent wall thickness that reduce friction losses and pump energy costs. For specialized conduit runs in processing plants, we also provide Petroleum grade stainless welded conduit, which delivers the electrical continuity and mechanical protection required in classified hazardous locations. Every joint is produced using autogenous TIG or plasma welding followed by stringent inline annealing to restore full corrosion resistance.
The Gas delivery stainless steel welded pipe family is designed specifically for the unique pressure and purity demands of natural gas, biogas, and hydrogen-blended distribution. Each length undergoes 100% eddy current or ultrasonic testing to detect sub-surface irregularities, and a final hydrostatic proof test per ASME B31.8 confirms the pipe’s ability to hold pressure well above the maximum allowable operating limit. The longitudinal weld seam is typically reduced by cold working and then solution annealed, which homogenizes the microstructure and eliminates carbide precipitation. This process yields a weld zone with tensile strength and ductility matching the base metal, so the entire pipe cross-section behaves uniformly under bending and axial loads. Standard delivery conditions include pickled and passivated surfaces to remove scale and promote a passive chromium oxide layer for decades of maintenance-free service underground or in coastal installations.
| Nominal Size (DN) | OD (mm) | Sch 40S Wall (mm) | Max. Working Pressure (bar) at 20°C* | Typical Gas Application |
|---|---|---|---|---|
| DN50 (2″) | 60.3 | 3.91 | 102.5 | Service and distribution branch lines |
| DN100 (4″) | 114.3 | 6.02 | 86.3 | District regulator and metering stations |
| DN150 (6″) | 168.3 | 7.11 | 74.5 | Main transmission headers |
| DN200 (8″) | 219.1 | 8.18 | 69.8 | Compressor station bypass piping |
| DN300 (12″) | 323.9 | 10.31 | 59.4 | Cross-country pipeline sections |
