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Introduction

A blind flange is a critical component in piping systems, designed to seal the end of a pipeline, valve, or pressure vessel. Unlike other flanges, it lacks a center hole, making it ideal for blocking fluid or gas flow. This article provides an in-depth analysis of blind flanges, including their technical specifications, applications, and industry relevance.

Product Features

• Material Options: Carbon steel (ASTM A105, P235GH), stainless steel (ASTM A182, 304/306), and alloy steel.
• Pressure Ratings: PN6 - PN40 / Class150 - Class2500.
• Size Range: DN10 - DN2000 / ½In - 24In.
• Standards Compliance: ASME, EN, JIS, DIN, BS, KS, GOST, SABS, ATK.
• Surface Coatings: Black paint, galvanize, grease, epoxy paint.

Technical Specifications Table

Parameter	Details
Pressure Rating	PN6 - PN40 / Class150 - Class2500
Size Range	DN10 - DN2000 / ½In - 24In
Materials	Carbon Steel (ASTM A105), Stainless Steel (ASTM A182), Alloy Steel
Standards	ASME, EN, JIS, DIN, BS, KS, GOST, SABS, ATK
Surface Coating	Black paint, galvanize, grease, epoxy paint

Applications

Blind flanges are widely used in industries such as oil and gas, chemical processing, power generation, and water treatment. They are essential for:

• Sealing pipeline ends during maintenance or expansion.
• Providing access points for inspection or future modifications.
• Ensuring leak-proof connections in high-pressure environments.

Installation Process

1. Ensure flange faces and gaskets are clean.
2. Place a compatible gasket between the blind flange and mating flange.
3. Align bolt holes and insert bolts, tightening in a crisscross pattern.
4. Use a torque wrench to apply even pressure as per manufacturer guidelines.
5. Conduct pressure testing to verify seal integrity.

Company Background

Manufactured by HEBEI JIUYUAN PIPELINE MANUFACTURING CO., LTD., a leading provider of pipeline solutions. The company specializes in high-quality flanges, adhering to international standards to meet diverse industrial needs.

References

For further information on industry standards, refer to the NIST (National Institute of Standards and Technology) website.