Product Overview
Industrial & Precision Stainless Steel Piping Solutions
Qiaodi Steel supplies a broad inventory of high-performance stainless steel seamless pipes, welded tubes, and sanitary piping. Sourced and processed in Wuxi—China’s core stainless steel hub—our pipes and tubes are engineered to withstand high pressures, corrosive environments, and extreme temperatures.
We strictly manufacture and inspect to major international standards, including ASTM A312, ASTM A269, ASTM A554, EN 10216-5, and DIN 17456. Whether for oil & gas, chemical processing, food & beverage, or structural fabrication, we offer complete end-finishing, custom cutting, polishing, and beveling to suit your precise project requirements.
Main Product Categories
- 01 / Seamless Stainless Steel Pipes (TP304 / TP316L / Duplex)
- Overview: Cold-drawn or hot-extruded without weld seams. Designed for high-pressure, critical, and high-corrosion industrial environments.
- Applications: Chemical processing, oil & gas pipelines, boilers, and heat exchangers.
- 02 / Welded Stainless Steel Tubes (EFW / ERW / TIG Welded)
- Overview: Precision-formed and automatically welded with smooth bead rolling and online weld inspection. Cost-effective with tight wall thickness tolerances.
- Applications: Fluid transport, water treatment, automotive exhaust, and structural tubing.
- 03 / Sanitary & Food-Grade Tubing
- Overview: Internally and externally polished (Ra $< 0.4\,\mu\text{m}$ / 180–400 Grit) to meet strict hygiene requirements and prevent bacterial growth.
- Applications: Food & beverage processing, dairy, pharmaceuticals, and biotechnology.
- 04 / Ornamental & Structural Tubes (Square, Rectangular, Round)
- Overview: High-aesthetic polished stainless steel tubes for decorative and mechanical structural frameworks.
- Applications: Architectural handrails, balustrades, building frameworks, and furniture hardware.
Technical Specifications & Dimensions
Technical Specifications & Manufacturing Standards
| Parameter | Seamless Stainless Steel Pipes | Welded Stainless Steel Tubes |
| Outer Diameter (OD) | 6.0 mm – 762 mm (1/8” to 30” NB) | 6.0 mm – 2000 mm (1/8” to 80” NB) |
| Wall Thickness (WT) | SCH 5S, SCH 10S, SCH 40S, SCH 80S, XXS | 0.5 mm – 30.0 mm |
| Common Grades | TP304/304L, TP316/316L, 310S, 321, Duplex 2205 | TP304/304L, TP316/316L, 409L, 430 |
| Manufacturing Standards | ASTM A312, ASTM A269, ASTM A213, EN 10216-5 | ASTM A312, ASTM A249, ASTM A554, EN 10217-7 |
| Length Options | 5.8m, 6.0m, 11.8m, 12.0m, or Custom Cut-to-Length | 6.0m, or Custom Lengths |
| Surface Finish | Annealed & Pickled (AP), Bright Annealed (BA), Polished | Mill Finish, 180/240/320 Grit Polished, Mirror (600 Grit) |
| Processing Services | Custom Cutting, Beveling, Threading, Grooving, Bending | Laser Cutting, Swaging, Flaring, Custom Fabrication |
Quality Control & Non-Destructive Testing
- Rigorous Testing Standards: Every pipe shipment undergoes strict pressure and structural integrity tests according to ASTM/EN specs.
- Available Testing Capabilities:
- Hydrostatic Pressure Testing & Pneumatic Testing
- Eddy Current Testing (ET) & Ultrasonic Testing (UT)
- Radiographic Inspection (RT) for welded seams
- Dimensional, Ovality, and Wall Thickness Ultrasonic Checks
- Full Certification: Supplied with EN 10204 3.1 Mill Test Certificates (MTC) guaranteeing heat number traceability, chemical analysis, and mechanical performance.
Packaging & Export Protection
- Pipe End Protection: Plastic caps on both ends to protect threads and bevels from moisture and transit impact.
- Surface Protection: Individual plastic wrapping or woven bundling for polished tubes.
- Seaworthy Packaging: Packed in heavy-duty wooden boxes, steel-framed crates, or wrapped in seaworthy bundles secured with steel straps for safe container loading.