Stainless Steel Forged Blind Flange
+ High pressure sealing: Class 900 integral forging, resistant to pressure 15MPa+
Corrosion resistance: Hastelloy C276 lining, resistant to 98% concentrated sulfuric acid +
Case: Zero leakage at the end of a pickling line for 8 years
- Product Introduction
Products Description
Stainless steel forged blind flanges are used to seal the ends of pipes. They have high pressure resistance and excellent corrosion resistance, making them suitable for high-pressure and corrosive industrial media.
Products Advantages
Resistant to Deformation
The integral forged structure (ASTM A182 F304/F316) results in a denser metal structure, achieving a tensile strength of 515–620 MPa.
Corrosion Resistant
Stainless steel containing ≥18% chromium and ≥8% nickel forms a stable passivation film, resisting corrosion from acids, alkalis, seawater, and chemical media.
More Reliable Sealing
The sealing surface roughness can be controlled within Ra 1.6 μm. Precision machining improves gasket fit and reduces the risk of leakage under pressure fluctuations.
High Dimensional Accuracy
CNC machining ensures dimensional tolerances are stabilized within ±0.1 mm.
Customizable Range
Sizes: 1/2"–48", Class 150–2500
Materials: F304, F316, F304L, F316L, duplex stainless steel, etc.
Threads and Sealing Surfaces: NPT/BSP/DIN Thread; RF, RTJ, FF
Surface Treatments: Rust-preventive oil, sandblasting, polishing
Packaging and Shipping
Sealed surfaces are covered with protective caps; the entire box is reinforced to prevent impact.
All parts are coated with anti-rust oil, suitable for long-distance sea freight.
Supports sea/air/express freight; can be shipped according to customer's freight forwarder.
Why Choose Us
Specializing in stainless steel forged flange production for over 15 years, with an annual capacity exceeding 5,000 tons.
We own our entire process factory: forging, machining, and testing are integrated, ensuring stable and controllable delivery times.
Our equipment includes CNC machining, forging lines, spectrometers, and UT flaw detectors, ensuring consistent quality across batches.
Our products meet international standards such as ASME, DIN, and EN, and are exported to Europe, America, the Middle East, and Southeast Asia.
FAQ
Q: Which standards are followed?
A: International standards such as ASME B16.5, B16.47, DIN, and EN.
Q: What materials and pressure ratings are available?
A: F304/F316 series, Class 150–2500.
Q: What thread types are available?
A: NPT, BSPP, BSPT, DIN Thread.
Q: Is customization possible?
A: OEM is supported for materials, dimensions, threads, sealing surfaces, logos, packaging, etc.
Q: What is the MOQ?
A: Standard order quantity is 10–50 pieces, negotiable.
Q: How is quality guaranteed?
A: We provide PMI, dimensional inspection, UT flaw detection, hydrostatic testing, and MTC 3.1.
Q: What is the lead time?
A: Standard 7–15 days; customized 15–25 days.
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