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ANSI Standard Flanges | DIN Standard Flanges | JIS Standard Flanges | BS Standard Flanges
|Summary of material used for flanges|
|MATERIAL||ASME/ANSI B16.5||ASME B16.47|
SERIES A (MSS SP-441
|ASME B16.47 |
SERIES B (or API 6052)
|BS 4504||BS 3293||BS 103|
|Plate (ASTM A240)4||-||-||-||-||-||-|
Most standard specify the material from which the flanges is produced. The purchaser should specify the exact requirements.
All sizes and grades compatible to standard pipe flanges and wall thicknesses (pressure ratings) are available. The table bellow provides a summary.
There are various face configurations for flanges. Typically: flat face, raised face, tongue and groove, and ring joint.
The finish on the face of a flange is measured as an Arithmetical Average Roughness Height (AARH). The finish is determined by the standard used. For example, ANSI B16.5 specifies face finishes within a range 125AARH - 500AARH (3.2 Ra to 12.5 Ra). Other finishes are available on request, for example 1.6 Ra Max. 1.6/3.2 Ra, 3.2/6.3 Ra or 6.3/12.5 Ra. The range 3.2/6.3 is most common.
|Summary of flanges size specified by common standards|
|FLANGE TYPE||ASME/ANSI B16.5||ASME B16.47|
Series A (or MSS SP-441)
Series B (or API 6052)
|Nominal Pipe Sizes|