These 304/304L Stainless Steel flanges are engineered for high-integrity sealing and pressure vessel termination. Specifically designed for the 10" to 48" (DN250 – DN1200) range, our forging process ensures grain structure refinement, providing superior resistance to intergranular corrosion and mechanical fatigue in high-pressure headers and distribution manifolds.
1. Technical Specifications
| Parameter | Specification Details |
| Material Grades | ASTM A182 F304/304L (Dual Certified), F316/316L, Duplex S31803 |
| Size Range | NPS 1/2" to 48" (DN15 – DN1200) |
| Pressure Ratings | ASME Class 150, 300, 600, 900, 1500, 2500; PN6 to PN100 |
| Dimensional Stds | ASME B16.5 (up to 24"), ASME B16.47 Series A/B (26"+), EN 1092-1, DIN |
| Facing | Raised Face (RF) 125-250 AARH, Flat Face (FF), Ring Type Joint (RTJ) |
| Manufacturing | Forged, Heat Treated, and CNC Machined |
2. Engineering Advantages
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Blind Flange Geometry: Designed for the termination of piping systems and pressure vessel openings. The solid forged disc is calculated to withstand significant bolt-load and internal pressure stresses without deformation.
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Threaded Options (NPT/BSPT): Ideal for explosive environments where welding is prohibited (Hot Work restrictions) or for systems requiring frequent disassembly in low-pressure applications.
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Corrosion Resistance: The low-carbon 304L variant prevents carbide precipitation during any secondary welding processes, maintaining the integrity of the heat-affected zone (HAZ).
3. Quality Assurance & Compliance
We operate under a rigorous QC framework to ensure zero-leak performance in critical infrastructure:
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Material Verification: Positive Material Identification (PMI) and Spectrographic Analysis.
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Non-Destructive Testing (NDT): Ultrasonic (UT) and Radiographic (RT) testing available for high-pressure Class 900+ specifications.
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Dimensional Tolerance: Strict adherence to ASME B16.5 tolerances for bolt hole alignment, thickness, and facing concentricity.
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Certification: Full MTRs (Material Test Reports) provided per EN 10204 3.1.
4. Application Environments
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Midstream Oil & Gas: Pig launcher/receiver closures.
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Cryogenic Service: 304 SS maintains toughness at sub-zero temperatures.
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Water Infrastructure: Desalination and high-capacity treatment manifolds.
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Chemical Processing: Reactive media containment where 300-series stability is required.
Logistics & Procurement
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Origin: Hebei Cangtie Industrial Co., Ltd (Cangzhou, China).
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Lead Times: 3–5 days (Ex-stock) | 10–25 days (Custom Forging/Large Diameter).
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Packaging: Export-grade seaworthy wooden cases with moisture-barrier lining.
