Class 1500 Flanges : ASTM A182 / ASME SA182 – B16.5
WEIGHTS & DIMENSIONS
1500# STAINLESS STEEL FLANGES
Nominal Pipe Size | Outside Diameter of Flange | Thickness of Flange | Diameter of Raised Face | Diameter of Hub at Base | Length Thru Hub | Diameter or Bore | Diameter of Hub at Bevel | Radius of Fillet | Depth of Socket |
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Welding Neck | Slip-On Threaded Socket | Lap Joint | Slip-on Socket | Lap Joint |
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O | Q | R | X | Y | Y | Y | W | B | H | r | Z |
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1/2 | 4-3/4 | 7/8 | 1-3/8 | 1-1/2 | 2-3/8 | 1-1/4 | 1-1/4 | .88 | .90 | .84 | 1/8 | 3/8 |
3/4 | 5-1/8 | 1 | 1-11/16 | 1-3/4 | 2-3/4 | 1-3/8 | 1-3/8 | 1.09 | 1.11 | 1.05 | 1/8 | 7/16 |
1 | 5-7/8 | 1-1/8 | 2 | 2-1/16 | 2-7/8 | 1-5/8 | 1-5/8 | 1.36 | 1.38 | 1.32 | 1/8 | 1/2 |
1-1/4 | 6-1/4 | 1-1/8 | 2-1/2 | 2-1/2 | 2-7/8 | 1-5/8 | 1-5/8 | 1.70 | 1.72 | 1.66 | 3/16 | 9/16 |
1-1/2 | 7 | 1-1/4 | 2-7/8 | 2-3/4 | 3-1/4 | 1-3/4 | 1-3/4 | 1.95 | 1.97 | 1.90 | 1/4 | 5/8 |
2 | 8-1/2 | 1-1/2 | 3-5/8 | 4-1/8 | 4 | 2-1/4 | 2-1/4 | 2.44 | 2.46 | 2.38 | 5/16 | 11/16 |
2-1/2 | 9-5/8 | 1-5/8 | 4-1/8 | 4-7/8 | 4-1/8 | 2-1/2 | 2-1/2 | 2.94 | 2.97 | 2.88 | 5/16 | 3/4 |
3 | 10-1/2 | 1-7/8 | 5 | 5-1/4 | 4-5/8 | 2-7/8 | 2-7/8 | 3.57 | 3.60 | 3.50 | 3/8 |
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4 | 12-1/4 | 2-1/8 | 6-3/16 | 6-3/8 | 4-7/8 | 3-9/16 | 3-9/16 | 4.57 | 4.60 | 4.50 | 7/16 |
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5 | 14-3/4 | 2-7/8 | 7-5/16 | 7-3/4 | 6-1/8 | 4-1/8 | 4-1/8 | 5.66 | 5.69 | 5.56 | 7/16 |
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6 | 15-1/2 | 3-1/4 | 8-1/2 | 9 | 6-3/4 | 4-11/16 | 4-11/16 | 6.72 | 6.75 | 6.63 | 1/2 |
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8 | 19 | 3-5/8 | 10-5/8 | 11-1/2 | 8-3/8 | 5-5/8 | 5-5/8 | 8.72 | 8.75 | 8.63 | 1/2 |
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10 | 23 | 4-1/4 | 12-3/4 | 14-1/2 | 10 | 6-1/4 | 7 | 10.88 | 10.92 | 10.75 | 1/2 |
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12 | 26-1/2 | 4-7/8 | 15 | 17-3/4 | 11-1/8 | 7-1/8 | 8-5/8 | 12.88 | 12.92 | 12.75 | 1/2 |
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14 | 29-1/2 | 5-1/4 | 16-1/4 | 19-1/2 | 11-3/4 | 9-1/2 | 14.14 | 14.18 | 14.00 | 1/2 |
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16 | 32-1/2 | 5-3/4 | 18-1/2 | 21-3/4 | 12-1/4 | 10-1/4 | 16.16 | 16.19 | 16.00 | 1/2 |
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18 | 36 | 6-3/8 | 21 | 23-1/2 | 12-7/8 | 10-7/8 | 18.18 | 18.20 | 18.00 | 1/2 |
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20 | 38-3/4 | 7 | 23 | 25-1/4 | 14 | 11-1/2 | 20.20 | 20.25 | 20.00 | 1/2 |
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24 | 46 | 8 | 27-1/4 | 30 | 16 | 13 | 24.25 | 24.25 | 24.00 | 1/2 |
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All dimensions are in inches.
WEIGHTS & DIMENSIONS
1500# STAINLESS STEEL FLANGES

Nominal Pipe Size | Drilling | Length of Studs | Approximate Weight in Pounds |
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Diameter of Bolt Circle | Number of Bolts | Diameter of Bolts | Diameter of Holes | 1/4” Raised Face | Ring Joint | Welding Neck | Slip-on Threaded Socket | Lap Joint | Blind |
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1/2 | 3-1/4 | 4 | 3/4 | 7/8 | 4 | 4 | 9 | 9 | 9 | 4 |
3/4 | 3-1/2 | 4 | 3/4 | 7/8 | 4-1/4 | 4-1/4 | 7 | 9 | 9 | 6 |
1 | 4 | 4 | 7/8 | 1 | 4-3/4 | 4-3/4 | 9 | 9 | 9 | 9 |
1-1/4 | 4-3/8 | 4 | 7/8 | 1 | 4-3/4 | 4-3/4 | 10 | 10 | 10 | 10 |
1-1/2 | 4-7/8 | 4 | 1 | 1-1/8 | 5-1/4 | 5-1/4 | 14 | 14 | 14 | 14 |
2 | 6-1/2 | 8 | 7/8 | 1 | 5-1/2 | 5-3/4 | 25 | 25 | 25 | 25 |
2-1/2 | 7-1/2 | 8 | 1 | 1-1/8 | 6 | 6-1/4 | 36 | 36 | 36 | 35 |
3 | 8 | 8 | 1-1/8 | 1-1/4 | 6-3/4 | 7 | 48 | 48 | 48 | 48 |
4 | 9-1/2 | 8 | 1-1/4 | 1-3/8 | 7-1/2 | 7-3/4 | 73 | 73 | 73 | 73 |
5 | 11-1/2 | 8 | 1-1/2 | 1-5/8 | 9-1/2 | 9-3/4 | 132 | 132 | 132 | 142 |
6 | 12-1/2 | 12 | 1-3/8 | 1-1/2 | 10 | 10-1/4 | 164 | 164 | 164 | 159 |
8 | 15-1/2 | 12 | 1-5/8 | 1-3/4 | 11-1/4 | 11-3/4 | 273 | 258 | 258 | 302 |
10 | 19 | 12 | 1-7/8 | 2 | 13-1/4 | 13-1/2 | 454 | 436 | 485 | 507 |
12 | 22-1/2 | 16 | 2 | 2-1/8 | 14-3/4 | 15-1/4 | 690 | 667 | 749 | 775 |
14 | 25 | 16 | 2-1/4 | 2-3/8 | 16 | 16-3/4 | 940 |
| 890 | 975 |
16 | 27-3/4 | 16 | 2-1/2 | 2-5/8 | 17-1/2 | 18-1/2 | 1250 |
| 1150 | 1800 |
18 | 30-1/2 | 16 | 2-3/4 | 2-7/8 | 19-1/4 | 20-1/4 | 1625 |
| 1475 | 1750 |
20 | 32-3/4 | 16 | 3 | 3-1/8 | 21 | 22-1/4 | 2050 |
| 1775 | 2225 |
24 | 39 | 16 | 3-1/2 | 3-5/8 | 24 | 25-1/2 | 3325 |
| 2825 | 3625 |
All dimensions are in inches.