In chemical processing environments where safety and purity cannot be compromised, piping materials must deliver exceptional corrosion resistance and mechanical strength over decades. Our Chemical grade welded stainless steel tube is manufactured to handle the most aggressive chemicals, from concentrated acids to organic solvents. These tubes are fabricated from premium stainless steel coils that undergo rigorous chemical analysis, ensuring a consistent alloy composition. Recognized as a leading Industrial stainless welded piping for chemistry, the product meets the demands of continuous operation at elevated temperatures, often exceeding 400°C. The longitudinal weld is fully penetrated and bead-worked to provide a smooth, crevice-free interior, critical for minimizing bacterial growth in sanitary lines. For mobile or modular process equipment, our Chemistry field welded stainless tubing offers the same high integrity in lightweight configurations. These tubes are subjected to a 100% in-line eddy current test after welding, detecting any discontinuity immediately. The entire production line operates under ISO 9001 and PED 2014/68/EU certifications, giving you complete traceability through each heat. In large-scale chemical plants, our Chemical facility stainless welded conduit serves as the backbone for raw material supply, reactor circuits, and waste treatment lines. Available in a broad range of diameters and schedules, these welded pipes significantly reduce overall project costs compared to seamless alternatives while maintaining equivalent pressure ratings. Furthermore, the welded pipe technology ensures uniform wall thickness, which enhances heat transfer efficiency in shell-and-tube exchangers—a common requirement in chemical thermal processes. All products are passivated and electropolished upon request, achieving surface roughness as low as 0.4 μm Ra, which is essential for high-purity processes such as API synthesis and chromatography. The internal surface cleanliness is validated through borescope inspection and water-break-free testing, guaranteeing a particle-free delivery. Standard length options range from 3 to 12 meters, with cut-to-length service and end beveling available to match any weld procedure specification. From pilot plants to full-scale refineries, these welded stainless steel tubular products have earned a reputation for reliability under cyclic loading and thermal shock.
When specifying a Chemical Process Stainless Steel Welded Pipe, engineers must evaluate the corrosive environment, operating temperature, and pressure cycles carefully. The material selection is critical: low-carbon grades 304L (UNS S30403) and 316L (UNS S31603) offer excellent resistance to general corrosion and are ideal for organic chemicals, food-grade acids, and solvents. For chloride-rich media, such as brine or seawater cooling, duplex 2205 (UNS S32205) provides superior resistance to pitting and stress corrosion cracking. For extremely aggressive conditions involving hot sulfuric or phosphoric acid, we can supply 904L or alloy 254SMO upon request. The pipe’s welded seam undergoes 100% real-time eddy current inspection, and every batch is tested for intergranular corrosion susceptibility per ASTM A262 Practice E, ensuring no degradation in welded joints. Post-weld heat treatment is performed in a controlled atmosphere to relieve residual stresses, and the pipes are uniformly pickled and passivated to restore the corrosion-resistant passive layer. Mechanical properties meet ASME BPE and ASTM A312 criteria: tensile strength ≥515 MPa, yield strength ≥205 MPa, elongation ≥35%, and hardness ≤90 HRB.
| Nominal Size | OD (mm) | Sch 10S Wall (mm) | Sch 40S Wall (mm) | Max. Pressure @ 20°C (bar) | Weight per Meter (kg) Sch 10S / 40S |
|---|---|---|---|---|---|
| 1/2" | 12.7 | 1.65 | 2.77 | 250 / 420 | 0.45 / 0.68 |
| 3/4" | 19.1 | 2.11 | 2.87 | 230 / 380 | 0.88 / 1.15 |
| 1" | 25.4 | 2.77 | 3.38 | 200 / 320 | 1.55 / 1.84 |
| 1½" | 38.1 | 3.05 | 3.68 | 180 / 290 | 2.63 / 3.12 |
| 2" | 50.8 | 3.05 | 3.91 | 160 / 280 | 3.59 / 4.52 |
| 3" | 76.2 | 3.38 | 5.49 | 140 / 260 | 6.07 / 9.57 |
| 4" | 101.6 | 3.56 | 6.02 | 120 / 240 | 8.61 / 14.2 |
To support swift project delivery, our inventory includes an extensive range of scheduled pipes—from 1/8 inch to 24 inch nominal diameter—in Sch 5S, 10S, 40S, and 80S. Customization such as orbital welding, end flanges, and pressure testing up to 600 bar is readily available through our in-house service center. Each pipe is supplied with full documentation, including material test certificates, surface finish reports, and pressure test charts. For high-purity chemical synthesis, electropolished surfaces guarantee minimal particle shedding and easy cleanability. Typical applications span from heat exchangers and distillation columns to solvent recovery and acid regeneration lines. The availability of matching butt-weld fittings and flanges in the same material grades ensures metallurgical compatibility and leak-free assemblies. By integrating these welded pipes into your system, you achieve a balance of high performance and cost-efficiency, with a procurement lead time typically 30% shorter than seamless alternatives for non-standard sizes.
