Stainless Steel Welded Pipe Manufacturer & Supplier
As a leading stainless steel welded pipe manufacturer, we specialize in producing high-performance welded pipes and tubes global industrial projects. Our core product line covers large-diameter industrial pipes, heat exchanger tubes, industrial process piping, nuclear power grade tubes, and sanitary/hygienic pipes.
We supply stainless steel welded tubes in a range of grades, dimensions, and surface finishes for industrial projects. Share your required grade, outside diameter, wall thickness, length, applicable standard, and quantity to request a quotation.
Stainless Steel Welded Pipe Specifications
- Material grades: 201, 304, 304L, 316, 316L, 2205, or other grades upon request
- Outside diameter (OD): 10–3000 mm
- Wall thickness (WT): 0.5–40 mm
- Pipe length: Customized lengths available
- Surface finish: Acid Pickling; Mechanical Polishing available for selected products.
- Standards: GB, ASTM, JIS, DIN, or EN, subject to product specification
- Customization: Material grade, dimensions, length, and finish
Pipe Outside Diameter & Nominal Wall Thickness
| Nominal diameter | Pipe outside diameter | Nominal wall thickness | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Series A | Series B | Sch55 | Sch105 | Sch205 | LG | Sch20 | Sch30 | STD | Sch40 | Sch60 | XS | Sch80 | Sch100 | Sch120 | Sch140 | Sch160 | ||
| 15 | 21.3 | 18 | 1.6 | 2.1 | 2.6 | 2.9 | 3.6 | 4.5 | ||||||||||
| 20 | 26.9 | 25 | 1.6 | 2.1 | 2.6 | 2.9 | 4.0 | 5.5 | ||||||||||
| 25 | 33.7 | 32 | 1.6 | 2.8 | 3.2 | 3.2 | 4.5 | 6.3 | ||||||||||
| 32 | 42.4 | 36 | 1.6 | 2.8 | 3.2 | 3.6 | 5.0 | 6.3 | ||||||||||
| 40 | 48.3 | 45 | 1.6 | 2.8 | 3.2 | 3.6 | 5.0 | 7.1 | ||||||||||
| 50 | 60.3 | 57 | 1.6 | 2.8 | 3.6 | 3.2 | 4.0 | 5.6 | 8.8 | |||||||||
| 65 | 76.1(73) | 76 | 2.0 | 3.0 | 3.6 | 4.5 | 5.0 | 7.1 | 10.0 | |||||||||
| 80 | 88.9 | 89 | 2.0 | 3.0 | 4.0 | 4.5 | 5.6 | 6.9 | 8.0 | 11.0 | ||||||||
| 90 | 101.6 | 2.0 | 3.0 | 4.0 | 4.5 | 5.6 | 8.0 | 12.5 | ||||||||||
| 100 | 114.3 | 108 | 2.0 | 3.0 | 4.0 | 2.0 | 5.9 | 7.9 | 8.8 | 11.0 | 14.2 | |||||||
| 125 | 139.7 | 133 | 2.9 | 3.4 | 5.0 | 5.0 | 6.3 | 10.0 | 12.5 | 16.0 | ||||||||
| 150 | 168.3 | 159 | 2.9 | 3.4 | 5.0 | 5.6 | 7.1 | 11.0 | 14.2 | 17.5 | ||||||||
| 200 | 219.1 | 219 | 2.9 | 4.0 | 6.3 | 6.3 | 7.1 | 8.0 | 10.0 | 12.5 | 16.0 | 17.5 | 20.0 | 22.2 | ||||
| 250 | 273.0 | 273 | 3.6 | 4.0 | 6.3 | 6.3 | 8.0 | 8.8 | 12.5 | 16.0 | 17.5 | 22.2 | 25.02 | 28.0 | ||||
| 300 | 323.9 | 325 | 4.0 | 4.5 | 6.3 | 6.3 | 8.8 | 10.0 | 14.2 | 17.5 | 22.2 | 25.0 | 8.0 | 32.0 | ||||
| 350 | 355.6 | 377 | 4.0 | 5.0 | 8.0 | 8.0 | 10. | 10.0 | 11.0 | 16.0 | 13.0 | 20.0 | 25.8 | 28.0 | 32.0 | 36.0 | ||
| 400 | 406.4 | 426 | 4.0 | 5.0 | 8.0 | 8.0 | 10.0 | 10.0 | 12.5 | 17.5 | 13.0 | 22.2 | 28.0 | 30.0 | 36.0 | 40.0 | ||
| 450 | 457 | 478 | 4.0 | 5.0 | 8.0 | 8.0 | 11.2 | 10.0 | 14.2 | 20.0 | 13.0 | 25.0 | 30.0 | 36.0 | 40.0 | 45.0 | ||
| 500 | 508 | 529 | 5.0 | 5.0 | 8.0 | 10.0 | 12.5 | 10.0 | 16.0 | 20.0 | 13.0 | 28.0 | 32.0 | 40.0 | 45.0 | 50.0 | ||
| 550 | 559 | 5.0 | 5.6 | 8.0 | 10.0 | 13.0 | 30.0 | |||||||||||
| 600 | 610 | 630 | 5.0 | 6.3 | 8.0 | 10.0 | 13.0 | 32.0 | ||||||||||
| 650 | 660 | 8.0 | 10.0 | 13.0 | ||||||||||||||
| 700 | 711 | 720 | 8.0 | 10.0 | 13.0 | |||||||||||||
| 750 | 762 | 8.0 | 10.0 | 13.0 | ||||||||||||||
| 800 | 813 | 820 | 8.0 | 10.0 | 13.0 | |||||||||||||
Stainless Steel Grade Comparison & Material Selection
Choose the right material grade based on your operating environment, corrosion resistance, and temperature requirements.
| Grade | Chemical Characteristics | Corrosion Resistance | Recommended Operating Conditions | Typical Applications |
|---|---|---|---|---|
| 304 / 304L | 18% Cr, 8% Ni (304L features lower carbon for better weldability) | Standard industrial corrosion resistance | Freshwater, mild atmospheric exposure, food-grade processing (< 800°C) | General fluid piping, municipal water supply, architecture |
| 316 / 316L | 16% Cr, 10% Ni, 2.0-3.0% Mo (Molybdenum) | High resistance to pitting and crevice corrosion in chloride environments | Acidic solutions, marine atmospheres, high-salinity water, harsh chemicals | Chemical processing, pharmaceutical, marine engineering, coastal plants |
| 321 | 17% Cr, 9% Ni, Stabilized with Titanium (Ti) | Intergranular corrosion resistance at elevated temperatures | High-temperature continuous operating environments (400°C – 900°C) | Exhaust systems, boilers, heat exchangers, high-temp industrial lines |
| 2205 (Duplex) | 22% Cr, 5% Ni, 3% Mo, Nitrogen-alloyed (Dual Ferritic-Austenitic structure) | Ultra-high resistance to Stress Corrosion Cracking (SCC) & PREN ≥ 32 | High pressure, severe acidic/chloride corrosion, aggressive offshore fluids | Oil & gas extraction, seawater desalination, heavy petrochemical units |
Stainless Steel Welded Pipe Types by Industrial Application
Explore our core product categories designed for diverse industrial requirements.
Large Diameter Industrial Welded Pipes
Stainless steel welded pipes designed for heavy-duty industrial fluid transport and large structures.
Corrosion-Resistant Chemical Processing Pipes
Manufactured in 316L and 2205 grades to withstand harsh chemical and acidic environments.
Heat Exchanger & Boiler Stainless Steel Tubes
High thermal efficiency and smooth surfaces designed for heat exchangers and boiler systems.
High-Precision Pipes for Nuclear & Critical Services
Strictly controlled tolerances and 100% testing for critical industrial and nuclear applications.
Our Manufacturing Capabilities & Expertise
We supply welded stainless steel pipes with consistent quality, competitive factory pricing, and reliable export support worldwide.
Experienced Production Team
Our experienced technicians oversee the production process, from material preparation to finished pipe inspection, helping maintain consistent product quality and dimensional accuracy.
Wide Range of Specifications
We offer stainless steel welded pipes with outer diameters (OD) from 10 mm to 3000 mm and wall thicknesses from 0.5 mm to 40.0 mm. Various sizes and specifications are available for different industrial applications.
Strict Quality Control
We perform dimensional checks, weld seam inspections, and online eddy current testing where applicable. Products can be manufactured and inspected according to relevant GB, ASTM, JIS, DIN, and EN standards, depending on project requirements.
Advanced Automated Production
Our automated production lines support continuous forming, welding, and online processing. Depending on product requirements, processes such as inner weld bead leveling and bright annealing help achieve the required weld quality and surface finish.
Customized Solutions for Multiple Industries
We provide options for material grades, dimensions, lengths, end preparations, and surface finishes. Our supply covers large-diameter industrial pipes, heat exchanger tubes, nuclear power tubing, and sanitary pipes widely used in petroleum, chemical, power plant, and automotive industries.
Factory Pricing and Export Support
As a direct supplier, we offer competitive factory pricing and support bulk orders and project-based requirements. We provide export packaging and shipping arrangements to ensure stainless steel welded pipes are delivered safely and efficiently.
Manufacturing Process of Stainless Steel Welded Pipe
Our stainless steel welded pipes are manufactured through a controlled process from strip preparation to final inspection.
01 Uncoiling
Stainless steel coils are uncoiled and flattened, and the steel strip is fed into the production line for material preparation.
02 Roll Forming
The steel strip passes through multiple sets of roller dies, being gradually squeezed and rolled into a tubular blank.
03 Automatic Plasma Welding
After the tube blank edges meet, continuous welding is performed with a stable weld seam, suitable for large-diameter industrial welded pipes.
04 Weld Bead Cooling Treatment
Cools the weld seam to release welding stress and reduce the risk of pipe deformation.
05 Inner Bead Leveling & Outer Seam Grinding
The inner and outer weld seams are ground smooth, ensuring a smooth pipe wall to meet export packaging requirements.
06 Automatic Cutting
CNC fixed-length cutting with neat edges, cutting materials according to order specifications.
07 Quality Inspection
Each stainless steel pipe is inspected for dimensional accuracy, weld quality, and surface condition to ensure compliance with the required specifications.
08 Finishing & Warehousing
Inspected pipes are properly packed and stored in the warehouse, ready for shipment.
Packaging & Delivery
We apply standard export packaging and protection solutions. Every shipment is strictly checked before leaving our warehouse. We cooperate with leading global shipping lines to ensure timely and cost-effective delivery.
FAQs
Stainless steel welded pipe is produced by forming stainless steel strip or plate into a tube and welding the edges together.
Grade 304 is widely used for general corrosion-resistant applications. Grade 316 contains molybdenum and generally offers better resistance to pitting and crevice corrosion in chloride-containing environments.
Yes, subject to manufacturing capability. Buyers can specify the material grade, outer diameter, wall thickness, length, surface finish, and applicable standard.
Wall thickness depends on pipe diameter, operating pressure, temperature, corrosion allowance, mechanical loads, and the applicable design code. Confirm the requirements with your project engineer.
Provide the material grade, pipe dimensions, quantity, length, applicable standard, surface finish, inspection requirements, and delivery destination.
Welded pipe is made by welding steel strips or plates, while seamless pipe is produced without a weld seam. The right choice depends on pressure requirements, application, and budget.
