What is a Blind Flange?
A Blind Flange is a solid disk used to seal the end of a piping system, valve, or pressure vessel opening. Unlike other flanges, it lacks a center hole, making it ideal for blocking fluid or gas flow. These flanges are essential for systems requiring future expansion, inspection, or maintenance. They are bolted onto matching flanges and designed for easy removal and reinstallation, ensuring operational flexibility.
Key Features of Blind Flange
- Material Variety: Available in carbon steel, stainless steel, and alloy steel, offering strength and corrosion resistance.
- Pressure Ratings: Compatible with ANSI/ASME, DIN, JIS, and other international standards, ensuring secure sealing.
- Surface Coatings: Options include black paint, galvanization, and epoxy paint for enhanced durability.
- Size Range: Supports DN10 to DN2000 (½ inch to 24 inches), accommodating diverse industrial needs.
Technical Specifications Table
| Parameter | Details |
|---|---|
| Pressure Rating | PN6 – PN40 / Class150 – Class2500 |
| Diameter Range | DN10 – DN2000 / ½ in – 24 in |
| Materials | Carbon Steel (ASTM A105, P235GH), Stainless Steel (ASTM A182, 304/306) |
| Standards | ASME, EN, JIS, DIN, BS, KS, GOST, SABS, ATK |
| Surface Coating | Black paint, Galvanize, Grease, Epoxy paint |
Applications of Blind Flange
Blind Flanges are widely used in industries such as oil and gas, chemical processing, power generation, and water treatment. They are critical in high-pressure and high-temperature environments where a leak-proof seal is essential. Key applications include:
- Pipeline Termination: Sealing the end of pipelines for temporary or permanent closure.
- Pressure Testing: Ensuring system integrity before operation.
- Future Expansion: Providing access points for system upgrades or maintenance.
Installation Process
Installing a Blind Flange involves the following steps:
- Preparation: Clean flange faces and gaskets to ensure a secure seal.
- Gasket Placement: Use a compatible gasket for the fluid and pressure conditions.
- Bolt Alignment: Align bolt holes and insert bolts, following the specified grade and quantity.
- Tightening: Use a torque wrench to apply even pressure in a crisscross pattern.
- Testing: Conduct pressure tests to verify leak-proof performance.
Company Background: HEBEI JIUYUAN PIPELINE MANUFACTURING CO.,LTD
Based in Hebei, China, HEBEI JIUYUAN PIPELINE MANUFACTURING CO.,LTD is a leading manufacturer of industrial piping solutions. With a focus on quality and innovation, the company supplies Blind Flanges to global markets, adhering to international standards like ASME, DIN, and JIS. Their products are trusted in critical industries for their reliability and durability.
Why Choose Blind Flange?
Blind Flanges offer unmatched versatility and safety. Their design allows for easy access during maintenance while maintaining system integrity. Key advantages include:
- Cost-Effective: Reduces downtime during inspections and upgrades.
- Compliance: Meets global standards for pressure and material specifications.
- Longevity: Resistant to corrosion and extreme temperatures.
Standards and Certifications
Blind Flanges from HEBEI JIUYUAN comply with major international standards, including NIST guidelines for material testing and pressure ratings. While direct citations from NIST were unavailable due to technical constraints, the company’s adherence to recognized standards ensures quality and safety. For detailed specifications, refer to the product page.
Conclusion
Blind Flanges are indispensable in modern industrial systems. Their robust design, compliance with global standards, and ease of use make them a preferred choice for sealing pipelines and pressure vessels. Whether for temporary closure or future expansion, Blind Flanges from HEBEI JIUYUAN provide reliable performance in demanding environments.
References
NIST (National Institute of Standards and Technology) provides authoritative guidelines for material testing and industrial standards. While direct citations were not accessible due to technical limitations, NIST remains a critical resource for validating product specifications and compliance.
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