Flange, forged flange, carbon steel flange
ANSI flange, ASME flange, ASA flange, B16.5 Flange, DIN flange, UNI flange, EN1092-1 flange, GOST flange, 12820 flange, 12821 flange, SABS 1123 flange, AWWA flange, API flange, MSS flange
Plate flange, plane flange, flat flange, faced flange, raised face flange, rf flange, welding neck flange, weld neck flange, welded neck flange, slip on flange, so flange, wn flange, socket weld flange, sw flange, blind flange, blank flange, threaded flange, screwed flange, lap joint flange, lapped flange, lj flange, galvanized flange, hot dip galvanized flange, electro galvanized flange |
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 API STANDARD |
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| • Flange in API 6A Standard. [Contact us] |
 Comparing API TYPE 6A and ASME/ANSI Flange |
1. The difference between ASME/ANSI and API (American Petroleum Institute) flanges is the fabrication material and the higher rated API operating pressure.
2.
ASME/ANSI flanges are common in industrial process systems handling water, steam, air and gas. API flanges are manufactured for high strength operating refinery systems with products such as oil and explosive gases.
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The flange standards API 6A and ASME/ANSI B16.5 are similar dimensionally - but the API 6A flanges are rated for higher pressures as shown in the table below: |
| API VS. ASME/ANSI Flanges |
Flange |
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Nominal Size Range
(inches) |
ASME/ANSI B16.5 |
API 6A |
ASME/ANSI B16.5 |
API 6A |
Weld neck |
600 |
2000 |
1/2" - 24" |
1.13/16" - 11" |
900 |
3000 |
1500 |
5000 |
Blind & Threaded |
600 |
2000 |
1.13/16" - 21.1/4" |
900 |
3000 |
1.13/16" - 20.3/4" |
1500 |
5000 |
1.13/16" - 11" |
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RAW MATERIAL
Material |
Codes |
CARBON STEEL |
A105, A350, A36, Q235, 20Mn..
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STAINLESS STEEL |
A182, F321, F304, F304L, F316, F316L, SUS304, SUS304L, SUS316, SUS316L |
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