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  • Tianjin Wanlei Steel Pipe Co.,Ltd

  • TEL: 86-22-65815991

  • FAX: 86-22-25343802

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  • ADD: Room 403, Unit 1, Building 31, Polar Square, Central Business District, Binhai New Area, Tianjin, China (Mainland)

Introduction To Flanges

Mar 10, 2026

What is a flange?

     A flange is a disc-shaped component used to connect pipes, valves, equipment, or other parts, typically used in pairs.

     It can be imagined as a detachable "universal interface" or "buckle".

What does the flange look like?

1.Shape: Typically a circular metal disk.

2.Key features:

 

ASME B16.47 Large Diameter Flange

There is a hole in the middle

This hole is used to allow liquid or gas in the pipeline to pass through.

ASME B16.47 Large Diameter Flange

Surrounding a circle of small holes

Multiple circular holes are evenly distributed around the disk, which are used to thread bolts (screws).

ASME B16.47 Large Diameter Flange

Surface grooves or patterns

The surfaces of two flanges facing each other usually have special designs for placing sealing gaskets.

Why do we need flanges? (Core role)

Easy disassembly

This is its biggest advantage. In contrast, if the pipeline is directly welded to death, it will be very troublesome to repair or replace it in the future. Connect with flanges, dismantle if you want, and install if you want.

01

Easy segmentation

Large projects (such as chemical plants and ships) can first divide the pipeline into many sections and connect them with flanges for convenient transportation and installation.

02

Connect different devices

You can connect the corresponding flanges on pipelines, valves, pumps, storage tanks, and other equipment.

03

Enduring high pressure

Well designed flanges and bolts can withstand very high internal pressures, commonly used in high-pressure pipelines such as steam, oil, and natural gas.

04

Summary

         A flange is the "building block connector" in a pipeline system, which tightly, firmly, and detachably connects two pipelines or equipment together through bolts and gaskets.

flange 19

        We are able to provide high quality flange according to customers' needs and look forward to your purchase.

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