ASME, ANSI standard - Full face flange gasket size - British unit (inch)
| ASME Standard - Full face flange gasket size (inch) | |||||||||||
| ASME B16.1 | ASME B16.5 | ASME B16.24 | MSS SP-51 | ||||||||
| Class 25 | Class 125 | Class 150 | Class 150 | Class 300 | Class 150LW | ||||||
| NPS | N holes | NPS | N holes | NPS | N holes | NPS | N holes | NPS | N holes | NPS | N holes |
| - | - | - | - | - | - | - | - | - | - | 1/4" | 4 |
| - | - | - | - | - | - | - | - | - | - | 3/8" | 4 |
| - | - | - | - | 1/2" | 4 | 1/2" | 4 | 1/2" | 4 | 1/2" | 4 |
| - | - | - | - | 3/4" | 4 | 3/4" | 4 | 3/4" | 4 | 3/4" | 4 |
| - | - | 1" | 4 | 1" | 4 | 1" | 4 | 1" | 4 | 1" | 4 |
| - | - | 1 1/4" | 4 | 1 1/4" | 4 | 1 1/4" | 4 | 1 1/4" | 4 | 1 1/4" | 4 |
| - | - | 1 1/2" | 4 | 1 1/2" | 4 | 1 1/2" | 4 | 1 1/2" | 4 | 1 1/2" | 4 |
| - | - | 2" | 4 | 2" | 4 | 2" | 4 | 2" | 8 | 2" | 4 |
| - | - | 2 1/2" | 4 | 2 1/2" | 4 | 2 1/2" | 4 | 2 1/2" | 8 | 2 1/2" | 4 |
| - | - | 3" | 4 | 3" | 4 | 3" | 4 | 3" | 8 | 3" | 4 |
| - | - | 3 1/2" | 8 | 3 1/2" | 8 | 3 1/2" | 8 | 3 1/2" | 8 | - | - |
| 4" | 8 | 4" | 8 | 4" | 8 | 4" | 8 | 4" | 8 | 4" | 8 |
| 5" | 8 | 5" | 8 | 5" | 8 | 5" | 8 | 5" | 8 | 5" | 8 |
| 6" | 8 | 6" | 8 | 6" | 8 | 6" | 8 | 6" | 12 | 6" | 8 |
| 8" | 8 | 8" | 8 | 8" | 8 | 8" | 8 | 8" | 12 | 8" | 8 |
| 10" | 12 | 10" | 12 | 10" | 12 | 10" | 12 | - | - | 10" | 12 |
| 12" | 12 | 12" | 12 | 12" | 12 | 12" | 12 | - | - | 12" | 12 |
| 14" | 12 | 14" | 12 | 14" | 12 | - | - | - | - | - | - |
| 16" | 16 | 16" | 16 | 16" | 16 | - | - | - | - | - | - |
| 18" | 16 | 18" | 16 | 18" | 16 | - | - | - | - | - | - |
| 20" | 20 | 20" | 20 | 20" | 20 | - | - | - | - | - | - |
| 24" | 20 | 24" | 20 | 24" | 20 | - | - | - | - | - | - |
| 30" | 28 | 30" | 28 | - | - | - | - | - | - | - | - |
| 36" | 32 | 36" | 32 | - | - | - | - | - | - | - | - |
| 42" | 36 | 42" | 36 | - | - | - | - | - | - | - | - |
| 48" | 44 | 48" | 44 | - | - | - | - | - | - | - | - |
| 54" | 44 | - | - | - | - | - | - | - | - | - | - |
| 60" | 52 | - | - | - | - | - | - | - | - | - | - |
| 72" | 60 | - | - | - | - | - | - | - | - | - | - |
| 84" | 64 | - | - | - | - | - | - | - | - | - | - |
| 96" | 68 | - | - | - | - | - | - | - | - | - | - |
Notice NPS is nominal diameter (nominal pipe size)
N holes is number of bolt holes
ASME B16.1 is for cast iron pipe flanges and flanged fittings.
ASME B16.5 is for normal flanges and flanged fittings.
ASME B16.24 is for cast copper alloy flanges and flanged fittings.
ASME MSS SP-51 is for corrosion resistant cast flanges and flanged fittings.
Contact details
Westbound Engineering Co., Ltd.
313/2 Phra-rama9 15, Phra-rama9 rd.,
Huaykwang, Bangkapi, Bangkok, Thailand, 10130
Tel : (+66)2-719-7300-8
Fax : (+66)2-719-7309
Email : info@thaiseal.com
Contact details
Westbound Engineering Co., Ltd.
313/2 Phra-rama9 15, Phra-rama9 rd.,
Huaykwang, Bangkapi, Bangkok, Thailand, 10130
Tel : (+66)2-719-7300-8
Fax : (+66)2-719-7309
Email : info@thaiseal.com
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