General standards, sizes and pressure classes for pipe flanges

ANSI standard flange size table:

ANSI standard pipe flanges are commonly used in fluid control systems and piping systems in the United States and Canada. Commonly used ANSI standard flange size tables are as follows: ANSI B16.5, ANSI B16.47 (large diameter), and their sizes correspond to the following:

1. ANSI B16.5
The size of the clapper flange is 1/2"-24", and the pressure rating is 150-2500LBS; the size of the blind flange is 1/2"-24", and the pressure rating is 150-2500LBS; the size of the neck welding flange is 1/2"-24", and the pressure rating is 150-2500LBS; the size of the flat welding flange is 1/2"-24", and the pressure rating is 150-2500LBS.

2. ANSI B16.47

The size of the large diameter flange is 26"-60", and the pressure rating is 150-900LBS.

JIS standard flange size table:

JIS standard flanges are commonly used in fluid control systems and piping systems in Japan. Commonly used JIS standard flange size tables are as follows: JIS B2220, JIS B2201, and their sizes correspond to the following:

1. JIS B2220
The flange size is 10A-1500A, and the pressure level is 5K-63K.

2. JIS B2201
The flange size is 10A-1000A, and the pressure level is 2.5K-40K.

BS standard flange size table:

BS standard flanges are commonly used in fluid control systems and pipeline systems in the UK. Commonly used BS standard flange size tables are as follows: BS 10, BS 1560, BS 4504, and their sizes correspond to the following:

1. BS 10
The flange size is 1/2"-48", and the pressure level is PN0.6-PN40.

2. BS 1560
The flange size is 1/2"-24", and the pressure level is PN2.0-PN40.

3. BS 4504
The flange size is 1/2"-48", and the pressure level is PN2.5-PN100.

DIN standard flange size table:

DIN standard flanges are commonly used in fluid control systems and pipeline systems in Germany. The commonly used DIN standard flange size tables are as follows: DIN 2527, DIN 2576, DIN 2631 and DIN 2635, and their sizes correspond to the following:

1. DIN 2527
The flange size is DN10-DN600, and the pressure level is PN6-PN100.

2. DIN 2576
The flange size is DN10-DN1000, and the pressure level is PN6-PN40.

3. DIN 2631
The flange size is DN10-DN2000, and the pressure level is PN6-PN100.

4. DIN 2635
The flange size is DN10-DN1000, and the pressure level is PN6-PN100.

EN standard flange size table:

EN standard flanges are commonly used in fluid control systems and piping systems in Europe. Commonly used EN standard flange size tables are as follows: EN 1092-1, EN 1759-1, and their sizes correspond to the following:

1. EN 1092-1
The flange size is DN10-DN2000, and the pressure level is PN2.5-PN400.

2. EN 1759-1
The flange size is DN10-DN4000, and the pressure level is PN2.5-PN400.

Conclusion:
This article introduces the commonly used pipe flange size table, including ANSI, JIS, BS, DIN and EN standards, and introduces the types, sizes and standards of various flanges in detail. I hope that through the introduction of this article, you can better understand the size standards of flanges, which will facilitate your use and selection.
 

HSCO specializes in the production and supply of pipe flanges and other steel pipe fittings in various materials and sizes, such as tees, pipe elbows, pipe reducers, valves, etc. If you have any needs, please contact us: sales@hu-steel.com

Read more: How to choose pipe flange material?

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