China Blind Flange（BL) Manufacturers

Blind Flange（BL)

The product specification
Our blind flanges follow international standards. They work well in high-pressure pipelines, like oil, gas, chemical, and water systems. We offer full blind flange specifications, including size, pressure class, and material. You can choose from standard blind flange sizes or request custom types. API blind flange options are also available.
1.Nominal Pipe Size(NPS)：DN15-DN2000,1/2″-80″
2.Pressure Rating：Class150-Class2500，PN10-PN160
3.Available Material：
①Stainless Steel: 31254, 904/L, 347/H, 317/L, 310S, 309, 316Ti, 321/H, 304/L, 304H, 316/L, 316H
②DP Steel: UNS S31803, S32205, S32750, S32760
③Alloy steel: N04400, N08800, N08810, N08811, N08825, N08020, N08031, N06600, N06625, N08926, N08031, N10276

Product Introduction

Flanges are extensively used in industries that rely on the secure transmission of liquids and gases. Sectors such as chemical processing, oil and gas, power generation, water treatment, and marine engineering all depend on flanged connections for their durability, leak-resistance, and ease of installation. The high reliability of flanges makes them ideal for critical systems operating under extreme conditions.

Product Parameters

NPS

DN15-DN2000,1/2″-80″

Pressure Rating

Class150-Class2500，PN10-PN160

Material

①Stainless Steel: 31254, 904/L, 347/H, 317/L, 310S, 309, 316Ti, 321/H, 304/L, 304H, 316/L, 316H

②DP Steel: UNS S31803, S32205, S32750, S32760

③Alloy steel: N04400, N08800, N08810, N08811, N08825, N08020, N08031, N06600, N06625, N08926, N08031, N10276

Core Technology

Refining Equipment: Flanges in catalytic cracking units connect reactors and separators, enduring temperatures up to 450°C, often made of alloy steel (e.g., 12Cr1MoV).