- Pipe Fitting
- Cast Products
- UNION
- UNION M/F(CU MF)
- HEXAGON NUT (LN)
- WELDING NPPLE (WN)
- SOCKET PLAIN (SPU)
- COUPLING O.D.MACHINED (SPE)
- 90 ELBOW(90LB)
- 45 ELBOW(45LB)
- STREET ELBOW(SLB)
- CAP (CB)
- BARREL NIPPLE (BN)
- SOCKET BANDED(SB)
- UNION(CU)
- REDUCING SOCKET BANDED (RSB)
- REDUCING TEE (RTB)
- REDUCING HEXAGON NIPPLE(RHN)
- SQUARE PLUG (SQ)
- CROSS (十B)
- TEE(TB)
- HOSE NIPPLE (HON)
- HEXAGON NIPPLE(HN)
- HEXAGON PLUG (HP)
- HEXAGON HEAD CAP(HCB)
- HEXAGON BUSHING(HB)
- Forged Products
- SW Coupling
- ECCENTRIC SWAGED NIPPLE
- FEMALE AND MALE THREADED 90° ELBOW
- HRD OUTLETS
- THREADED CROSS
- THREADED TEE
- THREADED CAP
- THREADED 90° ELBOW
- THREADED 45° ELBOW
- HEX HEAD BUSHING
- HEX HEAD PLUG
- NIPOLETS
- SQUARE HEAD PLUG
- BW OUTLET
- PIPE NIPPLE(TOE)
- Half-Coupling
- SW Half-Coupling
- SW OUTLETS
- SW REDUCER INSERTS TYPE2
- SW REDUCER INSERTS TYPE1
- SW
- SW Tee
- SW CAP
- SW45° LATERAL
- SW90° Elbow
- SW45° Elbow
- BOSS
- CLASS 3000 UNIONS OF SW ENDS
- CLASS 3000 UNIONS OF THRD ENDS
- ROUND HEAD PLUG
- REDUCING HEXAGONAL NIPPLE
- FLUSH BUSHING
- CONCENTRIC SWAGED NIPPLE
- STRAIGHT HEXAGONAL NIPPLE
- PIPE NIPPLE(TBE)
- TSW Coupling
- Flange
Looking for high-precision blind flanges? As leading China suppliers and a professional factory, we provide solid disks for pipelines and pressure vessels, ensuring leak-proof sealing and easy maintenance for industrial applications.
A Blind Flange is a professional-grade solid disk engineered to securely block off the end of a piping system, valve, or pressure vessel opening. Unlike standard flanges, it features no center hole, providing an absolute seal that stops the flow of fluids or gases. This makes it an indispensable component for temporary closures, permanent pipeline terminations, and creating strategic access points for future system expansions.
Designed for versatility and high-performance reliability, our blind flanges are manufactured to meet rigorous international standards. Whether used for pressure testing to ensure system integrity or for critical maintenance in hazardous environments, these flanges provide a leak-proof barrier that ensures operational safety across high-pressure and high-temperature industrial applications.
Detailed Parameters
| Pressure Rating | PN6 - PN40 / Class 150 - Class 2500 | Size Range (DN/Inch) | DN10 - DN2000 / ½" - 24" / S.A 12" - 60" |
|---|---|---|---|
| Carbon Steel (CS) | ASTM A105, P235GH, P245GH, P250GH, P265GH, ST37-2 | Stainless Steel (SS) | ASTM A182, SS304, SS306 |
| Standard Compliance | ASME, EN, JIS, DIN, BS, KS, GOST, SABS, ATK | Surface Coating | Black paint, Galvanize, Grease, Epoxy paint |
| Product Type | Solid Disk (No Center Hole) | Sealing Method | Bolted with Gasket |
| Application Env. | Non-corrosive & Corrosive (Material dependent) | Core Function | Pipeline Sealing & Pressure Containment |
Key Advantages
Superior Sealing
Provides a robust, leak-proof barrier critical for high-pressure and high-temperature industrial environments.
Easy Maintenance
Designed for rapid installation and removal, ideal for systems requiring frequent inspection or servicing.
Material Diversity
Available in Carbon Steel, Stainless Steel, and Alloy Steel to resist corrosion and ensure longevity.
Global Standards
Fully compatible with international ratings including ANSI/ASME, DIN, and JIS for seamless integration.
System Integrity
Essential for pressure testing pipelines to ensure zero leaks before the system becomes fully operational.
Future-Proofing
Allows for easy pipeline extensions and future expansions without compromising the existing structure.
Product Gallery
Management Platforms
Inventory Control
Real-time tracking of flange sizes and material grades to ensure rapid fulfillment.
Quality Assurance
Rigorous testing against ASME and DIN standards to guarantee structural integrity.
Order Monitoring
Transparent production milestones from raw material forging to final coating.
Logistics Sync
Optimized shipping routes for heavy metal products to reduce lead times globally.
Material Traceability
Full MTR (Material Test Report) documentation for every batch produced.
Custom Engineering
Tailored specifications for unique pressure ratings or non-standard dimensions.
Investment Return Comparison
| Feature | Standard Blind Flange | Premium Forged Flange | Low-Grade Alternatives |
|---|---|---|---|
| Seal Reliability | High | Ultra-High | Moderate |
| Lifespan | 10-15 Years | 20+ Years | 3-5 Years |
| Maintenance Cost | Low | Very Low | High (Frequent Leaks) |
| Pressure Tolerance | Standard | Extreme | Limited |
| Compliance | Full (ASME/DIN) | Full + Certifications | Partial/None |
Frequently Asked Questions
The primary purpose is to seal the end of a piping system or a pressure vessel opening, preventing the flow of fluids or gases and ensuring the system remains contained and safe.
Stainless steel (such as ASTM A182, 304, or 306) is highly recommended for corrosive environments due to its superior resistance to oxidation and chemical degradation.
Ensure surfaces are clean, use a compatible gasket, and tighten bolts gradually in a crisscross (star) pattern using a torque wrench to achieve even pressure.
Yes, they are ideal for temporary closures during maintenance, inspections, or when preparing a pipeline for future expansion.
The most common international standards include ASME (American), DIN (German), JIS (Japanese), and EN (European), which define dimensions and pressure ratings.
It allows technicians to seal off specific sections of a pipeline to test for leaks and ensure the system can withstand the intended operating pressure before commissioning.
