An MS Blind Flange (Mild Steel Blind Flange) is a solid plate designed to block the end of a pipeline, valve, or pressure vessel. Unlike other flanges, it has no bore and is primarily used for sealing or pressure testing pipelines. These flanges are widely used in industries like oil & gas, water treatment, construction, and power plants.
What is an MS Blind Flange?
An MS Blind Flange is a flat steel plate with bolt holes designed to be attached to the end of a pipe. These flanges help in temporarily or permanently sealing off a section of a pipeline while allowing future modifications or maintenance.
Standard Sizes of MS Blind Flanges
MS Blind Flanges come in various sizes based on ANSI, ASME, and IS standards. Below is a reference chart for standard dimensions:
| Nominal Pipe Size (NPS) | Flange Diameter (mm) | Bolt Hole Diameter (mm) | Number of Bolts |
|---|---|---|---|
| 1/2" | 90 | 15 | 4 |
| 1" | 125 | 19 | 4 |
| 2" | 150 | 19 | 4 |
| 4" | 230 | 19 | 8 |
| 6" | 280 | 22 | 8 |
| 8" | 345 | 22 | 8 |
| 10" | 405 | 25 | 12 |
| 12" | 485 | 25 | 12 |
| 14" | 535 | 29 | 12 |
| 16" | 595 | 29 | 16 |
| 18" | 635 | 32 | 16 |
| 20" | 685 | 32 | 20 |
Specifications of MS Blind Flanges
1. Material
Made from Mild Steel (MS), offering high strength and durability.
Can be galvanized or coated for corrosion resistance.
2. Pressure Ratings
Available in 150#, 300#, 600#, 900#, 1500#, and 2500# ratings.
Suitable for low to high-pressure applications.
3. Standards
Manufactured according to ASME B16.5, IS 6392, and ANSI B16.47 standards.
Available in both raised face (RF) and flat face (FF) designs.
4. Surface Finishes
Machined, Serrated, or Smooth for proper gasket seating.
Compatible with rubber, spiral wound, and metal gaskets.
Applications of MS Blind Flanges
MS Blind Flanges are used across various industries due to their sealing efficiency and ease of maintenance.
1. Oil & Gas Industry
Used to seal off pipelines during maintenance.
Prevents leakages in high-pressure systems.
2. Water Treatment Plants
Helps in isolating sections of pipelines for repair.
Used in pumping stations and filtration units.
3. Construction & Infrastructure
Used in HVAC, drainage, and plumbing systems.
Essential in building gas and liquid transport networks.
4. Power Plants
Used in steam and gas transmission pipelines.
Provides secure isolation for high-pressure systems.
5. Chemical & Fertilizer Industry
Helps in handling corrosive and hazardous fluids.
Used in chemical processing plants for controlled flow.
6. Marine & Shipbuilding
Used in ship pipelines for seawater distribution.
Ensures pipeline safety and leak prevention in harsh environments.
Advantages of MS Blind Flanges
1. Leak Prevention
Seals off pipelines completely, preventing leaks and contamination.
2. Easy Installation & Removal
Can be bolted or unbolted for maintenance or expansion.
3. Cost-Effective
Cheaper than stainless steel or alloy flanges.
Provides durability at a low cost.
4. Pressure Resistance
Withstands high pressure and extreme temperatures.
5. Customization Options
Available in custom sizes and coatings to meet specific industry needs.
Where to Buy MS Blind Flanges?
For high-quality MS Blind Flanges, consider suppliers like Udhhyog, known for providing standard and custom flange solutions.
Top Suppliers of MS Blind Flanges
Udhhyog (Delhi) – A leading supplier of MS Blind Flanges across Delhi, Haryana, Uttar Pradesh, and Jammu & Kashmir.
Available in B2B marketplaces and industrial distributors.
Custom fabrication options available for specific requirements.
Conclusion
MS Blind Flanges are an integral component in industrial piping systems, ensuring efficient sealing, pressure control, and maintenance. Whether used in oil & gas, power plants, or water treatment facilities, MS Blind Flanges provide reliability and cost-effectiveness.
For premium-quality MS Blind Flanges, trust Udhhyog, a leading supplier in North India.
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