Name: Industrial Blind Flange China Suppliers High Quality ASME Factory
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Industrial Blind Flange China Suppliers High Quality ASME Factory

Looking for reliable blind flange China suppliers? Our factory provides precision-engineered circular flat plates with no central opening for complete pipeline sealing. Compliant with ASME B16.5 and B16.47 standards, our flanges ensure leak-proof isolation for oil, gas, and chemical systems.

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Product Details

A blind flange is a precision-engineered circular flat plate designed to provide complete pipeline sealing. 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 system integrity.

Designed for high-performance industrial environments, our blind flanges serve as vital safety barriers in systems transporting flammable, explosive, or corrosive media. Whether used for temporary plugging during system commissioning or permanent sealing in high-pressure chemical plants, these components ensure maximum operational safety and compliance with rigorous international engineering standards.

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	Sealing Face (RF)	Raised Face: 2.0mm or 3.2mm platform
Sealing Face (FF)	Flat Face: Flush surface for rubber gaskets	Sealing Face (RTJ)	Ring Type Joint: 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	Low-Quality Alternative	Premium Engineered Flange
Sealing Reliability	High	Moderate/Low	Ultra-High
Operational Lifespan	5-10 Years	1-3 Years	15+ Years
Maintenance Cost	Low	High (Leakage risk)	Minimal
Safety Compliance	ASME Certified	Non-Standard	Full Traceability
Installation Speed	Fast	Variable	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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