Stainless welded tubing for petroleum industry

In the petroleum industry, fluid handling integrity starts with tube selection. Our comprehensive line includes the Oil and gas sector welded stainless steel tube, engineered for wellhead and downhole instrumentation. The Pipeline pipe for oil and gas transmission excels in gathering networks, offering high fatigue resistance. For process piping, the Petroleum grade stainless welded conduit handles sour crude and amine streams, while the Gas delivery stainless steel welded pipe is ideal for fuel gas and flare systems. These products are manufactured through automated longitudinal welding processes that ensure uniform bead profile and consistent fusion. Both as-welded and bead-conditioned options are available to match stringent piping specifications. All materials meet NACE MR0175/ISO 15156 for sulfide stress cracking resistance, making them suitable for the most aggressive production environments. Non-destructive testing includes full-length eddy current, ultrasonic wall measurement, and positive material identification prior to dispatch.

The Stainless Welded Petroleum Tubing portfolio delivers performance across the full spectrum of petroleum operations. Below are key design parameters and standard size configurations. This grade of tubing is synonymous with reliability in upstream exploration, midstream transport, and downstream refining, providing exceptional corrosion resistance and mechanical robustness under cyclic loads.

• Alloy Selections: Austenitic 304/304L for general corrosion resistance; 316/316L enhanced with molybdenum for chlorides; 321 stabilized for high-temperature oxidation; duplex 2205 for stress corrosion cracking resistance; 347 for intergranular corrosion immunity.
• Dimensional Range: Outer diameters from 1/8” (0.405”) to 24” (24.000”); wall thicknesses from 0.035” to 0.500”; lengths up to 12 m random or cut to client specification, with threaded or plain ends.
• Weld Quality: Full-penetration autogenous TIG or plasma welding with 100% radiography option; bead conditioning available per ASME B31.3; heat-affected zone control for mechanical integrity.
• Surface Finishes: Mill, bright annealed, pickled and passivated, or mechanically polished to 20 μin Ra for low friction and ease of cleaning.
• Certifications: EN 10204 3.1/3.2 material certificates, PMI testing, NACE MR0175/ISO 15156 compliance, and API 5LC registration.

These welded tubes offer consistent concentricity and minimal flash, reducing pressure drop in transmission systems. The Stainless Welded Petroleum Tubing is also custom-fabricated into coiled lengths for downhole umbilicals, subsea hydraulic systems, and chemical injection mandrels. Clients specify these tubes for their low magnetic permeability in intelligent well completions and their ability to withstand cyclic thermal stresses in steam injection lines. Every order includes full mill test reports detailing chemical composition, tensile properties, hardness, and corrosion test results per ASTM A262 Practice E, ensuring traceability from heat number to final installation in refineries, gas plants, or offshore platforms.