Product Overview
High-Pressure & Industrial Stainless Steel Piping Components
Qiaodi Steel supplies a comprehensive range of stainless steel pipe fittings engineered for high-pressure, high-temperature, and corrosive piping systems. Located in Wuxi—China’s primary logistics and industrial processing center—we provide global contractors, stockists, and industrial clients with reliable, high-precision piping components.
Our pipe fittings are manufactured and strictly tested in accordance with major international standards, including ASME B16.9, ASME B16.11, MSS SP-43, EN 10253, and DIN 2605. Whether you require seamless butt-weld fittings for heavy chemical processing or high-pressure forged NPT threaded fittings, we guarantee full heat traceability, precise wall thickness, and defect-free bevel ends.
Main Fitting Categories by Connection Type
- 01 / Butt-Weld Pipe Fittings (ASME B16.9 / MSS SP-43)
- Overview: Seamless and welded fittings designed for permanent welded joints providing high strength and leak-proof performance in high-pressure lines.
- Types: 45° / 90° / 180° Elbows (LR & SR), Equal & Reducing Tees, Concentric & Eccentric Reducers, Stub Ends, and Pipe Caps.
- 02 / Threaded Pipe Fittings (150LB / 3000LB / 6000LB – NPT / BSPT)
- Overview: Cast and forged fittings with precision NPT or BSPT threads for easy assembly and disassembly in lower pressure or compact piping circuits.
- Types: Threaded Elbows, Tees, Couplings, Unions, Bushings, Hex Plugs, Nipple Fittings, and Crosses.
- 03 / Socket Weld Forged Fittings (ASME B16.11 3000# / 6000#)
- Overview: High-pressure forged fittings where pipes are inserted into a recessed area and fillet-welded. Ideal for small-bore, high-pressure piping applications.
- Types: Socket Weld Elbows, Tees, Full/Half Couplings, Unions, and Bosses.
Technical Specifications & Material Range
Technical Specifications & Manufacturing Capabilities
| Parameter | Butt-Weld Fittings | Forged High-Pressure Fittings (Threaded / SW) |
| Size Range | 1/2” to 48” (DN15 – DN1200) | 1/8” to 4” (DN6 – DN100) |
| Wall Thickness / Class | SCH 5S, SCH 10S, SCH 40S, SCH 80S, SCH 160, XXS | 150LB, 2000LB, 3000LB, 6000LB, 9000LB |
| Material Grades | TP304/304L, TP316/316L, 310S, 321, Duplex 2205 / 2507 | F304/F304L, F316/F316L, F321, F310S |
| Standards | ASME B16.9, MSS SP-43, EN 10253, DIN 2605, JIS B2312 | ASME B16.11, BS 3799, MSS SP-83, ISO 4144 |
| End Preparation | Beveled Ends (ANSI B16.25), Plain Ends | NPT (ANSI B1.20.1), BSPT (ISO 7-1), Socket Weld |
| Surface Finish | Pickled & Passivated, Sand Blasted, Polished (180–400 Grit) | Bright Shot Blasted, Machined Bright, Passivated |
Quality Assurance & Pressure Testing
- Rigorous QC Inspection: 100% dimensional check, wall thickness measurement using ultrasonic gauges, and thread verification with go/no-go gauges.
- Testing Capabilities:
- Hydrostatic Pressure Testing & Pneumatic Testing
- Positive Material Identification (PMI Spectrometer Test)
- Non-Destructive Testing (NDT) / Liquid Penetrant Inspection (PT) for welded fittings
- Full Compliance: Delivered with EN 10204 3.1 Mill Test Certificates (MTC) guaranteeing original heat numbers, chemical composition, and mechanical properties.
Packaging & Ocean Shipping Protection
- End & Thread Protection: Plastic end caps for bevel ends and thread protectors for high-pressure threaded fittings to prevent impact damage.
- Seaworthy Packaging: Smaller fittings packed in inner plastic bags and sturdy cartons; heavy cargo packed in wooden cases or pallets wrapped with waterproof film.