Collection: Blind Flange(BL Flange)

Overview

Blind Flanges are solid pipe flanges designed to close the end of a piping system or pressure vessel opening. They provide a safe and reliable way to isolate pipelines, allowing for inspection, maintenance, pressure testing, and future system expansion.

Manufactured in accordance with international standards, our Blind Flanges are widely used in oil & gas, petrochemical, chemical, power generation, and water treatment industries worldwide.

Product Features

• Full Bore Closure: Solid design ensures complete sealing of pipeline ends.

• High Strength & Safety: Suitable for high-pressure and high-temperature applications.

• Easy Installation & Removal: Allows convenient system isolation and future modifications.

• Material Versatility: Available in Carbon Steel, Stainless Steel, Alloy Steel, and Duplex Steel.

• Wide Size Range: DN15 – DN4000 (custom sizes available).

• Pressure Ratings: ASME Class 150 – 2500; PN 6 – PN 400.

• Manufacturing Method: Forged or machined for precise dimensions and smooth surface finish.

Standards Compliance

Our Blind Flanges are manufactured according to major international standards:

• ASME B16.5 / B16.47 – American flange standards

• EN 1092-1 – European standard

• DIN / JIS – Optional for European & Japanese projects

• GOST 12820 / GOST 12821 – Russian standards

• Custom Standards – Available upon request

Compliance ensures safe performance in critical piping and pressure vessel applications.

Materials & Grades

• Carbon Steel: ASTM A105, ASTM A350 LF2

• Stainless Steel: ASTM A182 F304 / F316 / F321

• Alloy Steel: ASTM A182 F11 / F22

• Duplex / Super Duplex Steel: ASTM A182 F51 / F53

Carefully selected materials provide excellent mechanical strength, corrosion resistance, and long service life.

Applications

Blind Flanges are widely used in:

• Pipeline end closure and system isolation

• Pressure vessels and heat exchangers

• Oil & gas processing facilities

• Chemical and petrochemical plants

• Power generation systems

• Water treatment and desalination plants

Ideal for applications requiring temporary or permanent sealing of piping systems.

Why Choose Our Blind Flanges

• Precision Manufacturing: Accurate bolt holes and smooth sealing surfaces

• Standards Compliance: ASME, EN, DIN/JIS, GOST, or project-specific standards

• Material Options: Carbon Steel, Stainless Steel, Alloy Steel, Duplex Steel

• Custom Solutions: Sizes, thickness, facing types, and pressure ratings per drawings

• Global Export Experience: Reliable supplier for international B2B projects