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ASME Blind Flange China Factory | Leading Industrial Piping Suppliers
Searching for professional blind flange China suppliers? Our factory delivers precision-engineered ASME B16.5 and B16.47 compliant flanges for leak-proof pipeline isolation in oil, gas, and chemical industries.
SupplierCangzhou Weihuan Pipeline Equipment Co.,Ltd.www.weihuantube.com
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About this product
Product information from the supplier.
A blind flange is a precision-engineered circular flat plate designed to provide an absolute seal for pipeline terminations. By eliminating the central opening and utilizing strategically distributed bolt holes, it integrates seamlessly with corresponding pipeline flanges and gaskets to create an airtight and leak-proof barrier. This critical component is essential for media isolation, enabling safe maintenance and long-term shutdowns of pipeline sections without compromising overall system integrity.
Engineered for high-performance industrial environments, our blind flanges serve as vital safety barriers in systems transporting flammable, explosive, or corrosive media. Whether utilized for temporary plugging during system commissioning or permanent sealing in high-pressure chemical plants, these components ensure maximum operational safety and strict compliance with rigorous international engineering standards such as ASME.
Detailed Parameters
| Nominal Pipe Size | NPS ½ (DN15) to NPS 60 (DN1500) | Pressure Ratings | Class 150, 300, 600, 900, 1500, 2500 |
|---|---|---|---|
| Standard Compliance | ASME B16.5, ASME B16.47 Series A & B | Raised Face (RF) | 2.0mm or 3.2mm platform |
| Flat Face (FF) | Flush surface for rubber gaskets | Ring Type Joint (RTJ) | Trapezoidal groove for high pressure |
| Carbon Steel | ASTM A105, A350 LF2 (General Purpose) | Stainless Steel | ASTM A182 F304, F316 (Corrosion Resistant) |
| Alloy Steel | ASTM A182 F5, F9 (High Temp/Pressure) | Application Scope | Oil, Gas, Chemical, Power & Water Treatment |
Key Advantages
Maximum Safety
Acts as a fail-safe isolation barrier for hazardous, toxic, and explosive media.
Rapid Installation
Simple bolted structure allows for quick switching between open and closed states.
Global Standardization
Full compliance with ASME standards ensures dimensional accuracy and interoperability.
Reliable Sealing
Precision-machined faces guarantee zero leakage under extreme pressure and temperature.
Material Versatility
Available in Carbon, Stainless, and Alloy steels to suit any corrosive environment.
Cost-Effective
Low-maintenance design reduces long-term operational costs in industrial piping.
Product Gallery
Management Platforms
Inventory Control
Real-time tracking of NPS and Class specifications to ensure rapid dispatch.
Quality Assurance
Rigorous inspection against ASME B16.5 and B16.47 dimensional tolerances.
Compliance Audit
Full material traceability and certification for high-pressure safety standards.
Logistics Tracking
Optimized shipping for heavy structural metal components to reduce lead times.
Material Management
Strict separation of Stainless and Carbon steel to prevent cross-contamination.
Custom Engineering
Flexible manufacturing for non-standard dimensions and special alloy requirements.
Investment Return Comparison
| Performance Metric | Standard Blind Flange | Premium Engineered Flange |
|---|---|---|
| Sealing Reliability | High | Ultra-High |
| Operational Lifespan | 5-10 Years | 15+ Years |
| Maintenance Cost | Low | Minimal |
| Safety Compliance | ASME Certified | Full Traceability |
| Installation Speed | Fast | Instant/Precision |
Frequently Asked Questions
Q: What is the primary difference between RF and RTJ sealing faces?
RF (Raised Face) uses a raised platform and is typically paired with soft gaskets for medium-low pressure. RTJ (Ring Type Joint) features a trapezoidal groove for metal ring gaskets, specifically designed for high-pressure environments like oil and gas pipelines.
Q: Which material should I choose for corrosive chemical pipelines?
For corrosive environments, Stainless Steel blind flanges (such as ASTM A182 F304 or F316) are recommended due to their excellent corrosion resistance compared to carbon steel.
Q: Does your product comply with ASME B16.47 standards?
Yes, we provide blind flanges compliant with ASME B16.47 Series A and Series B for large-diameter requirements ranging from NPS 26 to NPS 60.
Q: How does a blind flange contribute to pipeline safety?
It provides a positive mechanical seal that completely blocks the flow of media, acting as a safety barrier during equipment replacement or emergency shutdowns to prevent hazardous leaks.
Q: Can alloy steel blind flanges handle high temperatures?
Yes, alloy steels like ASTM A182 F5 and F9 are specifically engineered for high-temperature and high-pressure service, common in power plants and refineries.
Q: What is the function of the bolt holes on a blind flange?
The bolt holes are precision-drilled to match the corresponding pipeline flange, allowing the blind flange to be securely fastened and compressed against a gasket to ensure a leak-proof seal.
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Cangzhou Weihuan Pipeline Equipment Co.,Ltd.
