Concentric and Eccentric Reducer Dimensions
A reducer changes pipe size in a single butt-welded fitting. Concentric reducers keep both ends on a common centerline; eccentric reducers share a flat side instead, which keeps either the top or the bottom of the line running straight through the size change.
Concentric or eccentric is not a style choice.
On a horizontal line, a concentric reducer creates a high point where vapour collects and a low point where liquid and solids settle. That is why pump suction lines use an eccentric reducer flat side up. It keeps the top of the pipe level so air cannot pocket ahead of the pump and cause cavitation. On vertical lines the distinction stops mattering and concentric is normal.
Flat side up or flat side down.
Flat side up on pump suction, to prevent vapour pockets. Flat side down where you want the line to drain completely and keep solids moving. Getting this backwards is one of the most common and most expensive piping mistakes in rotating equipment work.
How To Read These Dimensions
ASME B16.9 covers concentric and eccentric reducers, and gives both the same overall length L at a given size pairing. The standard sets the dimensions; it does not tell you which of the two the service needs, and that is the part worth getting right.
- O.D.
- Outside diameterOutside diameter at the welding end, matching the pipe it welds to.
- I.D.
- Inside diameterBore through the fitting, set by the wall thickness.
- T
- Wall thicknessNominal wall at the welding end, matched to the pipe schedule.
- L
- Overall lengthFace to face, end to end. Concentric and eccentric reducers share the same L at a given size pairing.
389 sizes across 17 schedules · dimensions in inches, weights in pounds · ASME B16.9
Schedule STD
| Nom. Size | O.D. | LARGE DIAMETER I.D. | T | O.D. | SMALL DIAMETER I.D. | T | Length L | Pipe Sched. No. | Approx. Wt. Lbs. |
|---|---|---|---|---|---|---|---|---|---|
| ¾ × ½ | 1.05 | 0.824 | 0.113 | 0.84 | 0.622 | 0.109 | 1.50 | 40 | 0.21 |
| 1 × ¾ | 1.32 | 1.054 | 0.133 | 1.05 | 0.824 | 0.113 | 2.00 | 40 | 0.36 |
| 1 × ½ | 1.32 | 1.054 | 0.133 | 0.84 | 0.622 | 0.109 | 2.00 | 40 | 0.36 |
| 1¼ × 1 | 1.66 | 1.380 | 0.140 | 1.32 | 1.054 | 0.133 | 2.00 | 40 | 0.48 |
| 1¼ × ¾ | 1.66 | 1.380 | 0.140 | 1.05 | 0.824 | 0.113 | 2.00 | 40 | 0.42 |
| 1¼ × ½ | 1.66 | 1.380 | 0.140 | 0.84 | 0.622 | 0.109 | 2.00 | 40 | 0.42 |
| 1½ × 1¼ | 1.90 | 1.610 | 0.145 | 1.66 | 1.380 | 0.140 | 2.50 | 40 | 0.65 |
| 1½ × 1 | 1.90 | 1.610 | 0.145 | 1.32 | 1.054 | 0.133 | 2.50 | 40 | 0.57 |
| 1½ × ¾ | 1.90 | 1.610 | 0.145 | 1.05 | 0.824 | 0.113 | 2.50 | 40 | 0.56 |
| 1½ × ½ | 1.90 | 1.610 | 0.145 | 0.84 | 0.622 | 0.109 | 2.50 | 40 | 0.56 |
| 2 × 1½ | 2.38 | 2.072 | 0.154 | 1.90 | 1.610 | 0.145 | 3.00 | 40 | 0.94 |
| 2 × 1¼ | 2.38 | 2.072 | 0.154 | 1.66 | 1.380 | 0.140 | 3.00 | 40 | 0.88 |
| 2 × 1 | 2.38 | 2.072 | 0.154 | 1.32 | 1.054 | 0.133 | 3.00 | 40 | 0.81 |
| 2 × ¾ | 2.38 | 2.072 | 0.154 | 1.05 | 0.824 | 0.113 | 3.00 | 40 | 0.74 |
| 2½ × 2 | 2.88 | 2.474 | 0.203 | 2.38 | 2.072 | 0.154 | 3.50 | 40 | 1.60 |
| 2½ × 1½ | 2.88 | 2.474 | 0.203 | 1.90 | 1.610 | 0.145 | 3.50 | 40 | 1.50 |
| 2½ × 1¼ | 2.88 | 2.474 | 0.203 | 1.66 | 1.380 | 0.140 | 3.50 | 40 | 1.40 |
| 2½ × 1 | 2.88 | 2.474 | 0.203 | 1.32 | 1.054 | 0.133 | 3.50 | 40 | 1.30 |
| 3 × 2½ | 3.50 | 3.068 | 0.216 | 2.88 | 2.474 | 0.203 | 3.50 | 40 | 2.20 |
| 3 × 2 | 3.50 | 3.068 | 0.216 | 2.38 | 2.072 | 0.154 | 3.50 | 40 | 2.00 |
| 3 × 1½ | 3.50 | 3.068 | 0.216 | 1.90 | 1.610 | 0.145 | 3.50 | 40 | 1.90 |
| 3 × 1¼ | 3.50 | 3.068 | 0.216 | 1.66 | 1.380 | 0.140 | 3.50 | 40 | 1.80 |
| 3 × 1 | 3.50 | 3.068 | 0.216 | 1.32 | 1.054 | 0.133 | 3.50 | 40 | 1.70 |
| 3½ × 3 | 4.00 | 3.548 | 0.226 | 3.50 | 3.068 | 0.216 | 4.00 | 40 | 2.80 |
| 3½ × 2½ | 4.00 | 3.548 | 0.226 | 2.88 | 2.474 | 0.203 | 4.00 | 40 | 2.70 |
Schedule STD (cont.)
| Nom. Size | O.D. | LARGE DIAMETER I.D. | T | O.D. | SMALL DIAMETER I.D. | T | Length L | Pipe Sched. No. | Approx. Wt. Lbs. |
|---|---|---|---|---|---|---|---|---|---|
| 3½ × 2 | 4.00 | 3.548 | 0.226 | 2.38 | 2.072 | 0.154 | 4.00 | 40 | 2.60 |
| 3½ × 1½ | 4.00 | 3.548 | 0.226 | 1.90 | 1.610 | 0.145 | 4.00 | 40 | 2.60 |
| 3½ × 1¼ | 4.00 | 3.548 | 0.226 | 1.66 | 1.380 | 0.140 | 4.00 | 40 | 2.50 |
| 4 × 3½ | 4.50 | 4.026 | 0.237 | 4.00 | 3.548 | 0.226 | 4.00 | 40 | 3.50 |
| 4 × 3 | 4.50 | 4.026 | 0.237 | 3.50 | 3.068 | 0.216 | 4.00 | 40 | 3.30 |
| 4 × 2½ | 4.50 | 4.026 | 0.237 | 2.88 | 2.474 | 0.203 | 4.00 | 40 | 3.20 |
| 4 × 2 | 4.50 | 4.026 | 0.237 | 2.38 | 2.072 | 0.154 | 4.00 | 40 | 3.10 |
| 4 × 1½ | 4.50 | 4.026 | 0.237 | 1.90 | 1.610 | 0.145 | 4.00 | 40 | 3.00 |
| 4 × 1¼ | 4.50 | 4.026 | 0.237 | 1.66 | 1.380 | 0.140 | 4.00 | 40 | 3.00 |
| 4 × 1 | 4.50 | 4.026 | 0.237 | 1.32 | 1.054 | 0.133 | 4.00 | 40 | 2.80 |
| 5 × 4 | 5.56 | 5.044 | 0.258 | 4.50 | 4.026 | 0.237 | 5.00 | 40 | 5.50 |
| 5 × 3½ | 5.56 | 5.044 | 0.258 | 4.00 | 3.548 | 0.226 | 5.00 | 40 | 5.30 |
| 5 × 3 | 5.56 | 5.044 | 0.258 | 3.50 | 3.068 | 0.216 | 5.00 | 40 | 5.10 |
| 5 × 2½ | 5.56 | 5.044 | 0.258 | 2.88 | 2.474 | 0.203 | 5.00 | 40 | 4.80 |
| 5 × 2 | 5.56 | 5.044 | 0.258 | 2.38 | 2.072 | 0.154 | 5.00 | 40 | 4.70 |
| 6 × 5 | 6.62 | 6.060 | 0.280 | 5.56 | 5.044 | 0.258 | 5.50 | 40 | 7.60 |
| 6 × 4 | 6.62 | 6.060 | 0.280 | 4.50 | 4.026 | 0.237 | 5.50 | 40 | 7.40 |
| 6 × 3½ | 6.62 | 6.060 | 0.280 | 4.00 | 3.548 | 0.226 | 5.50 | 40 | 7.10 |
| 6 × 3 | 6.62 | 6.060 | 0.280 | 3.50 | 3.068 | 0.216 | 5.50 | 40 | 6.90 |
| 6 × 2½ | 6.62 | 6.060 | 0.280 | 2.88 | 2.474 | 0.203 | 5.50 | 40 | 6.60 |
| 6 × 2 | 6.62 | 6.060 | 0.280 | 2.38 | 2.072 | 0.154 | 5.50 | 40 | 6.50 |
| 8 × 6 | 8.62 | 7.976 | 0.322 | 6.62 | 6.060 | 0.280 | 6.00 | 40 | 12.30 |
| 8 × 5 | 8.62 | 7.976 | 0.322 | 5.56 | 5.044 | 0.258 | 6.00 | 40 | 11.50 |
| 8 × 4 | 8.62 | 7.976 | 0.322 | 4.50 | 4.026 | 0.237 | 6.00 | 40 | 10.80 |
| 8 × 3½ | 8.62 | 7.976 | 0.322 | 4.00 | 3.548 | 0.226 | 6.00 | 40 | 10.60 |
Schedule STD (cont.)
| Nom. Size † | O.D. | LARGE DIAMETER I.D. | T | O.D. | SMALL DIAMETER I.D. | T | Length L | Pipe Sched. No. | Approx. Wt. Lbs. |
|---|---|---|---|---|---|---|---|---|---|
| 8 × 3 | 8.62 | 7.976 | 0.322 | 3.50 | 3.068 | 0.216 | 6.00 | 40 | 9.80 |
| 10 × 8 | 10.75 | 10.020 | 0.365 | 8.62 | 7.976 | 0.322 | 7.00 | 40 | 22.10 |
| 10 × 6 | 10.75 | 10.020 | 0.365 | 6.62 | 6.060 | 0.280 | 7.00 | 40 | 20.70 |
| 10 × 5 | 10.75 | 10.020 | 0.365 | 5.56 | 5.044 | 0.258 | 7.00 | 40 | 19.50 |
| 10 × 4 | 10.75 | 10.020 | 0.365 | 4.50 | 4.026 | 0.237 | 7.00 | 40 | 18.40 |
| 12 × 10 | 12.75 | 12.000 | 0.375 | 10.75 | 10.020 | 0.365 | 8.00 | * | 32.40 |
| 12 × 8 | 12.75 | 12.000 | 0.375 | 8.62 | 7.976 | 0.322 | 8.00 | * | 30.50 |
| 12 × 6 | 12.75 | 12.000 | 0.375 | 6.62 | 6.060 | 0.280 | 8.00 | * | 29.50 |
| 12 × 5 | 12.75 | 12.000 | 0.375 | 5.56 | 5.044 | 0.258 | 8.00 | * | 27.80 |
| 12 × 4 | 12.75 | 12.000 | 0.375 | 4.50 | 4.026 | 0.237 | 8.00 | * | 26.20 |
| 14 × 12 | 14.00 | 13.250 | 0.375 | 12.75 | 12.000 | 0.375 | 13.00 | * | 63.10 |
| 14 × 10 | 14.00 | 13.250 | 0.375 | 10.75 | 10.020 | 0.365 | 13.00 | * | 61.40 |
| 14 × 8 | 14.00 | 13.250 | 0.375 | 8.62 | 7.976 | 0.322 | 13.00 | * | 60.00 |
| 14 × 6 | 14.00 | 13.250 | 0.375 | 6.62 | 6.060 | 0.280 | 13.00 | * | 59.20 |
| 16 × 14 | 16.00 | 15.250 | 0.375 | 14.00 | 13.250 | 0.375 | 14.00 | * | 75.40 |
| 16 × 12 | 16.00 | 15.250 | 0.375 | 12.75 | 12.000 | 0.375 | 14.00 | * | 72.70 |
| 16 × 10 | 16.00 | 15.250 | 0.375 | 10.75 | 10.020 | 0.365 | 14.00 | * | 71.10 |
| 16 × 8 | 16.00 | 15.250 | 0.375 | 8.62 | 7.976 | 0.322 | 14.00 | * | 69.40 |
| 16 × 6 | 16.00 | 15.250 | 0.375 | 6.62 | 6.060 | 0.280 | 14.00 | * | 67.40 |
| 18 × 16 | 18.00 | 17.250 | 0.375 | 16.00 | 15.250 | 0.375 | 15.00 | * | 87.30 |
| 18 × 14 | 18.00 | 17.250 | 0.375 | 14.00 | 13.250 | 0.375 | 15.00 | * | 86.00 |
| 18 × 12 | 18.00 | 17.250 | 0.375 | 12.75 | 12.000 | 0.375 | 15.00 | * | 84.80 |
| 18 × 10 | 18.00 | 17.250 | 0.375 | 10.75 | 10.020 | 0.365 | 15.00 | * | 83.70 |
| 18 × 8 | 18.00 | 17.250 | 0.375 | 8.62 | 7.976 | 0.322 | 15.00 | * | 81.75 |
| 20 × 18 | 20.00 | 19.250 | 0.375 | 18.00 | 17.250 | 0.375 | 20.00 | * | 123.00 |
Schedule STD (cont.)
| Nom. Size | O.D. | LARGE DIAMETER I.D. | T | O.D. | SMALL DIAMETER I.D. | T | Length L | Pipe Sched. No. | Approx. Wt. Lbs. |
|---|---|---|---|---|---|---|---|---|---|
| 20 × 16 | 20.00 | 19.250 | 0.375 | 16.00 | 15.250 | 0.375 | 20.00 | * | 121.00 |
| 20 × 14 | 20.00 | 19.250 | 0.375 | 14.00 | 13.250 | 0.375 | 20.00 | * | 119.00 |
| 20 × 12 | 20.00 | 19.250 | 0.375 | 12.75 | 12.000 | 0.375 | 20.00 | * | 118.00 |
| 20 × 10 | 20.00 | 19.250 | 0.375 | 10.75 | 10.020 | 0.365 | 20.00 | * | 117.00 |
| 24 × 20 | 24.00 | 23.250 | 0.375 | 20.00 | 19.250 | 0.375 | 20.00 | * | 156.00 |
| 24 × 18 | 24.00 | 23.250 | 0.375 | 18.00 | 17.250 | 0.375 | 20.00 | * | 153.00 |
| 24 × 16 | 24.00 | 23.250 | 0.375 | 16.00 | 15.250 | 0.375 | 20.00 | * | 150.00 |
| 24 × 14 | 24.00 | 23.250 | 0.375 | 14.00 | 13.250 | 0.375 | 20.00 | * | 147.00 |
| 24 × 12 | 24.00 | 23.250 | 0.375 | 12.75 | 12.000 | 0.375 | 20.00 | * | 144.00 |
| 24 × 10 | 24.00 | 23.250 | 0.375 | 10.75 | 10.020 | 0.365 | 20.00 | * | 141.00 |
| 30 × 24 | 30.00 | 29.250 | 0.375 | 24.00 | 23.250 | 0.375 | 24.00 | * | 315.00 |
| 30 × 20 | 30.00 | 29.250 | 0.375 | 20.00 | 19.250 | 0.375 | 24.00 | * | 315.00 |
| 30 × 18 | 30.00 | 29.250 | 0.375 | 18.00 | 17.250 | 0.375 | 24.00 | * | 315.00 |
| 36 × 30 | 36.00 | 35.250 | 0.375 | 30.00 | 29.250 | 0.375 | 24.00 | * | 379.00 |
| 36 × 24 | 36.00 | 35.250 | 0.375 | 24.00 | 23.250 | 0.375 | 24.00 | * | 379.00 |
| 36 × 20 | 36.00 | 35.250 | 0.375 | 20.00 | 19.250 | 0.375 | 24.00 | * | 379.00 |
| 42 × 36 | 42.00 | 41.250 | 0.375 | 36.00 | 35.250 | 0.375 | 24.00 | * | 443.00 |
| 42 × 30 | 42.00 | 41.250 | 0.375 | 30.00 | 29.250 | 0.375 | 24.00 | * | 443.00 |
| 42 × 24 | 42.00 | 41.250 | 0.375 | 24.00 | 23.250 | 0.375 | 24.00 | * | 443.00 |
| 48 × 42 | 48.00 | 47.250 | 0.375 | 42.00 | 41.250 | 0.375 | 28.00 | * | 525.00 |
| 48 × 36 | 48.00 | 47.250 | 0.375 | 36.00 | 35.250 | 0.375 | 28.00 | * | 525.00 |
| 48 × 30 | 48.00 | 47.250 | 0.375 | 30.00 | 29.250 | 0.375 | 28.00 | * | 525.00 |
| 48 × 24 | 48.00 | 47.250 | 0.375 | 24.00 | 23.250 | 0.375 | 28.00 | * | 525.00 |
Schedule XS
| Nom. Size | O.D. | LARGE DIAMETER I.D. | T | O.D. | SMALL DIAMETER I.D. | T | Length L | Pipe Sched. No. | Approx. Wt. Lbs. |
|---|---|---|---|---|---|---|---|---|---|
| ¾ × ½ | 1.05 | 0.742 | 0.154 | 0.84 | 0.546 | 0.147 | 1.50 | 80 | 0.25 |
| 1 × ¾ | 1.32 | 0.962 | 0.179 | 1.05 | 0.742 | 0.154 | 2.00 | 80 | 0.43 |
| 1 × ½ | 1.32 | 0.962 | 0.179 | 0.84 | 0.546 | 0.147 | 2.00 | 80 | 0.42 |
| 1¼ × 1 | 1.66 | 1.278 | 0.191 | 1.32 | 0.962 | 0.179 | 2.00 | 80 | 0.57 |
| 1¼ × ¾ | 1.66 | 1.278 | 0.191 | 1.05 | 0.742 | 0.154 | 2.00 | 80 | 0.53 |
| 1¼ × ½ | 1.66 | 1.278 | 0.191 | 0.84 | 0.546 | 0.147 | 2.00 | 80 | 0.50 |
| 1½ × 1¼ | 1.90 | 1.500 | 0.200 | 1.66 | 1.278 | 0.191 | 2.50 | 80 | 0.78 |
| 1½ × 1 | 1.90 | 1.500 | 0.200 | 1.32 | 0.962 | 0.179 | 2.50 | 80 | 0.72 |
| 1½ × ¾ | 1.90 | 1.500 | 0.200 | 1.05 | 0.742 | 0.154 | 2.50 | 80 | 0.65 |
| 1½ × ½ | 1.90 | 1.500 | 0.200 | 0.84 | 0.546 | 0.147 | 2.50 | 80 | 0.65 |
| 2 × 1½ | 2.38 | 1.944 | 0.218 | 1.90 | 1.500 | 0.200 | 3.00 | 80 | 1.20 |
| 2 × 1¼ | 2.38 | 1.944 | 0.218 | 1.66 | 1.278 | 0.191 | 3.00 | 80 | 1.10 |
| 2 × 1 | 2.38 | 1.944 | 0.218 | 1.32 | 0.962 | 0.179 | 3.00 | 80 | 1.00 |
| 2 × ¾ | 2.38 | 1.944 | 0.218 | 1.05 | 0.742 | 0.154 | 3.00 | 80 | 0.94 |
| 2½ × 2 | 2.88 | 2.328 | 0.276 | 2.38 | 1.944 | 0.218 | 3.50 | 80 | 2.10 |
| 2½ × 1½ | 2.88 | 2.328 | 0.276 | 1.90 | 1.500 | 0.200 | 3.50 | 80 | 1.90 |
| 2½ × 1¼ | 2.88 | 2.328 | 0.276 | 1.66 | 1.278 | 0.191 | 3.50 | 80 | 1.70 |
| 2½ × 1 | 2.88 | 2.328 | 0.276 | 1.32 | 0.962 | 0.179 | 3.50 | 80 | 1.50 |
| 3 × 2½ | 3.50 | 2.900 | 0.300 | 2.88 | 2.328 | 0.276 | 3.50 | 80 | 2.80 |
| 3 × 2 | 3.50 | 2.900 | 0.300 | 2.38 | 1.944 | 0.218 | 3.50 | 80 | 2.60 |
| 3 × 1½ | 3.50 | 2.900 | 0.300 | 1.90 | 1.500 | 0.200 | 3.50 | 80 | 2.40 |
| 3 × 1¼ | 3.50 | 2.900 | 0.300 | 1.66 | 1.278 | 0.191 | 3.50 | 80 | 2.30 |
| 3 × 1 | 3.50 | 2.900 | 0.300 | 1.32 | 0.962 | 0.179 | 3.50 | 80 | 2.20 |
| 3½ × 3 | 4.00 | 3.364 | 0.318 | 3.50 | 2.900 | 0.300 | 4.00 | 80 | 3.70 |
| 3½ × 2½ | 4.00 | 3.364 | 0.318 | 2.88 | 2.328 | 0.276 | 4.00 | 80 | 3.50 |
Schedule XS (cont.)
| Nom. Size | O.D. | LARGE DIAMETER I.D. | T | O.D. | SMALL DIAMETER I.D. | T | Length L | Pipe Sched. No. | Approx. Wt. Lbs. |
|---|---|---|---|---|---|---|---|---|---|
| 3½ × 2 | 4.00 | 3.364 | 0.318 | 2.38 | 1.944 | 0.218 | 4.00 | 80 | 3.30 |
| 3½ × 1½ | 4.00 | 3.364 | 0.318 | 1.90 | 1.500 | 0.200 | 4.00 | 80 | 3.20 |
| 3½ × 1¼ | 4.00 | 3.364 | 0.318 | 1.66 | 1.278 | 0.191 | 4.00 | 80 | 3.20 |
| 4 × 3½ | 4.50 | 3.826 | 0.337 | 4.00 | 3.364 | 0.318 | 4.00 | 80 | 4.90 |
| 4 × 3 | 4.50 | 3.826 | 0.337 | 3.50 | 2.900 | 0.300 | 4.00 | 80 | 4.70 |
| 4 × 2½ | 4.50 | 3.826 | 0.337 | 2.88 | 2.328 | 0.276 | 4.00 | 80 | 4.60 |
| 4 × 2 | 4.50 | 3.826 | 0.337 | 2.38 | 1.944 | 0.218 | 4.00 | 80 | 4.30 |
| 4 × 1½ | 4.50 | 3.826 | 0.337 | 1.90 | 1.500 | 0.200 | 4.00 | 80 | 4.20 |
| 4 × 1¼ | 4.50 | 3.826 | 0.337 | 1.66 | 1.278 | 0.191 | 4.00 | 80 | 4.10 |
| 4 × 1 | 4.50 | 3.826 | 0.337 | 1.32 | 0.962 | 0.179 | 4.00 | 80 | 4.00 |
| 5 × 4 | 5.56 | 4.810 | 0.375 | 4.50 | 3.826 | 0.337 | 5.00 | 80 | 7.50 |
| 5 × 3½ | 5.56 | 4.810 | 0.375 | 4.00 | 3.364 | 0.318 | 5.00 | 80 | 6.90 |
| 5 × 3 | 5.56 | 4.810 | 0.375 | 3.50 | 2.900 | 0.300 | 5.00 | 80 | 6.30 |
| 5 × 2½ | 5.56 | 4.810 | 0.375 | 2.88 | 2.328 | 0.276 | 5.00 | 80 | 6.10 |
| 5 × 2 | 5.56 | 4.810 | 0.375 | 2.38 | 1.944 | 0.218 | 5.00 | 80 | 6.00 |
| 6 × 5 | 6.62 | 5.756 | 0.432 | 5.56 | 4.810 | 0.375 | 5.50 | 80 | 11.50 |
| 6 × 4 | 6.62 | 5.756 | 0.432 | 4.50 | 3.826 | 0.337 | 5.50 | 80 | 10.70 |
| 6 × 3½ | 6.62 | 5.756 | 0.432 | 4.00 | 3.364 | 0.318 | 5.50 | 80 | 10.00 |
| 6 × 3 | 6.62 | 5.756 | 0.432 | 3.50 | 2.900 | 0.300 | 5.50 | 80 | 9.70 |
| 6 × 2½ | 6.62 | 5.756 | 0.432 | 2.88 | 2.328 | 0.276 | 5.50 | 80 | 9.10 |
| 6 × 2 | 6.62 | 5.756 | 0.432 | 2.38 | 1.944 | 0.218 | 5.50 | 80 | 8.60 |
| 8 × 6 | 8.62 | 7.620 | 0.500 | 6.62 | 5.756 | 0.432 | 6.00 | 80 | 18.80 |
| 8 × 5 | 8.62 | 7.620 | 0.500 | 5.56 | 4.810 | 0.375 | 6.00 | 80 | 17.60 |
| 8 × 4 | 8.62 | 7.620 | 0.500 | 4.50 | 3.826 | 0.337 | 6.00 | 80 | 17.00 |
| 8 × 3½ | 8.62 | 7.620 | 0.500 | 4.00 | 3.364 | 0.318 | 6.00 | 80 | 15.90 |
Schedule XS (cont.)
| Nom. Size † | O.D. | LARGE DIAMETER I.D. | T | O.D. | SMALL DIAMETER I.D. | T | Length L | Pipe Sched. No. | Approx. Wt. Lbs. |
|---|---|---|---|---|---|---|---|---|---|
| 8 × 3 | 8.62 | 7.620 | 0.500 | 3.50 | 2.900 | 0.300 | 6.00 | 80 | 15.00 |
| 10 × 8 | 10.75 | 9.750 | 0.500 | 8.62 | 7.620 | 0.500 | 7.00 | * | 29.40 |
| 10 × 6 | 10.75 | 9.750 | 0.500 | 6.62 | 5.756 | 0.432 | 7.00 | * | 28.30 |
| 10 × 5 | 10.75 | 9.750 | 0.500 | 5.56 | 4.810 | 0.375 | 7.00 | * | 26.90 |
| 10 × 4 | 10.75 | 9.750 | 0.500 | 4.50 | 3.826 | 0.337 | 7.00 | * | 24.20 |
| 12 × 10 | 12.75 | 11.750 | 0.500 | 10.75 | 9.750 | 0.500 | 8.00 | * | 41.50 |
| 12 × 8 | 12.75 | 11.750 | 0.500 | 8.62 | 7.620 | 0.500 | 8.00 | * | 38.60 |
| 12 × 6 | 12.75 | 11.750 | 0.500 | 6.62 | 5.756 | 0.432 | 8.00 | * | 37.40 |
| 12 × 5 | 12.75 | 11.750 | 0.500 | 5.56 | 4.810 | 0.375 | 8.00 | * | 36.30 |
| 12 × 4 | 12.75 | 11.750 | 0.500 | 4.50 | 3.826 | 0.337 | 8.00 | * | 34.70 |
| 14 × 12 | 14.00 | 13.000 | 0.500 | 12.75 | 11.750 | 0.500 | 13.00 | * | 81.00 |
| 14 × 10 | 14.00 | 13.000 | 0.500 | 10.75 | 9.750 | 0.500 | 13.00 | * | 76.70 |
| 14 × 8 | 14.00 | 13.000 | 0.500 | 8.62 | 7.620 | 0.500 | 13.00 | * | 74.60 |
| 14 × 6 | 14.00 | 13.000 | 0.500 | 6.62 | 5.756 | 0.432 | 13.00 | * | 72.30 |
| 16 × 14 | 16.00 | 15.000 | 0.500 | 14.00 | 13.000 | 0.500 | 14.00 | * | 98.00 |
| 16 × 12 | 16.00 | 15.000 | 0.500 | 12.75 | 11.750 | 0.500 | 14.00 | * | 95.80 |
| 16 × 10 | 16.00 | 15.000 | 0.500 | 10.75 | 9.750 | 0.500 | 14.00 | * | 93.30 |
| 16 × 8 | 16.00 | 15.000 | 0.500 | 8.62 | 7.620 | 0.500 | 14.00 | * | 91.10 |
| 16 × 6 | 16.00 | 15.000 | 0.500 | 6.62 | 5.756 | 0.432 | 14.00 | * | 89.80 |
| 18 × 16 | 18.00 | 17.000 | 0.500 | 16.00 | 15.000 | 0.500 | 15.00 | * | 118.00 |
| 18 × 14 | 18.00 | 17.000 | 0.500 | 14.00 | 13.000 | 0.500 | 15.00 | * | 117.00 |
| 18 × 12 | 18.00 | 17.000 | 0.500 | 12.75 | 11.750 | 0.500 | 15.00 | * | 115.00 |
| 18 × 10 | 18.00 | 17.000 | 0.500 | 10.75 | 9.750 | 0.500 | 15.00 | * | 113.00 |
| 18 × 8 | 18.00 | 17.000 | 0.500 | 8.62 | 7.620 | 0.500 | 15.00 | * | 100.00 |
| 20 × 18 | 20.00 | 19.000 | 0.500 | 18.00 | 17.000 | 0.500 | 20.00 | * | 162.00 |
Schedule XS (cont.)
| Nom. Size | O.D. | LARGE DIAMETER I.D. | T | O.D. | SMALL DIAMETER I.D. | T | Length L | Pipe Sched. No. | Approx. Wt. Lbs. |
|---|---|---|---|---|---|---|---|---|---|
| 20 × 16 | 20.00 | 19.000 | 0.500 | 16.00 | 15.000 | 0.500 | 20.00 | * | 159.00 |
| 20 × 14 | 20.00 | 19.000 | 0.500 | 14.00 | 13.000 | 0.500 | 20.00 | * | 157.00 |
| 20 × 12 | 20.00 | 19.000 | 0.500 | 12.75 | 11.750 | 0.500 | 20.00 | * | 155.00 |
| 20 × 10 | 20.00 | 19.000 | 0.500 | 10.75 | 9.750 | 0.500 | 20.00 | * | 152.00 |
| 24 × 20 | 24.00 | 23.000 | 0.500 | 20.00 | 19.000 | 0.500 | 20.00 | * | 201.00 |
| 24 × 18 | 24.00 | 23.000 | 0.500 | 18.00 | 17.000 | 0.500 | 20.00 | * | 197.00 |
| 24 × 16 | 24.00 | 23.000 | 0.500 | 16.00 | 15.000 | 0.500 | 20.00 | * | 194.00 |
| 24 × 14 | 24.00 | 23.000 | 0.500 | 14.00 | 13.000 | 0.500 | 20.00 | * | 190.00 |
| 24 × 12 | 24.00 | 23.000 | 0.500 | 12.75 | 11.750 | 0.500 | 20.00 | * | 188.00 |
| 24 × 10 | 24.00 | 23.000 | 0.500 | 10.75 | 9.750 | 0.500 | 20.00 | * | 186.00 |
| 30 × 24 | 30.00 | 29.000 | 0.500 | 24.00 | 23.000 | 0.500 | 24.00 | * | 315.00 |
| 30 × 20 | 30.00 | 29.000 | 0.500 | 20.00 | 19.000 | 0.500 | 24.00 | * | 315.00 |
| 30 × 18 | 30.00 | 29.000 | 0.500 | 18.00 | 17.000 | 0.500 | 24.00 | * | 315.00 |
| 36 × 30 | 36.00 | 35.000 | 0.500 | 30.00 | 29.000 | 0.500 | 24.00 | * | 379.00 |
| 36 × 24 | 36.00 | 35.000 | 0.500 | 24.00 | 23.000 | 0.500 | 24.00 | * | 379.00 |
| 36 × 20 | 36.00 | 35.000 | 0.500 | 20.00 | 19.000 | 0.500 | 24.00 | * | 379.00 |
| 42 × 36 | 42.00 | 41.000 | 0.500 | 36.00 | 35.000 | 0.500 | 24.00 | * | 443.00 |
| 42 × 30 | 42.00 | 41.000 | 0.500 | 30.00 | 29.000 | 0.500 | 24.00 | * | 443.00 |
| 42 × 24 | 42.00 | 41.000 | 0.500 | 24.00 | 23.000 | 0.500 | 24.00 | * | 443.00 |
| 48 × 42 | 48.00 | 47.000 | 0.500 | 42.00 | 41.000 | 0.500 | 28.00 | * | 525.00 |
| 48 × 36 | 48.00 | 47.000 | 0.500 | 36.00 | 35.000 | 0.500 | 28.00 | * | 525.00 |
| 48 × 30 | 48.00 | 47.000 | 0.500 | 30.00 | 29.000 | 0.500 | 28.00 | * | 525.00 |
| 48 × 24 | 48.00 | 47.000 | 0.500 | 24.00 | 23.000 | 0.500 | 28.00 | * | 525.00 |
Schedule 40
| Nom. Size | O.D. FOR DIMENSION SPECIFICATIONS ½ | LARGE DIAMETER I.D. | T | O.D. ″ THROUGH 10 | SMALL DIAMETER I.D. ″ | T REFER TO SCHEDULE STD | Length L | Pipe Sched. No. | Approx. Wt. Lbs. |
|---|---|---|---|---|---|---|---|---|---|
| 12 × 10 | 12.75 | 11.938 | 0.406 | 10.75 | 10.020 | 0.365 | 8.00 | 40 | 35.80 |
| 12 × 8 | 12.75 | 11.938 | 0.406 | 8.62 | 7.976 | 0.322 | 8.00 | 40 | 35.80 |
| 12 × 6 | 12.75 | 11.938 | 0.406 | 6.62 | 6.060 | 0.280 | 8.00 | 40 | 35.80 |
| 12 × 5 | 12.75 | 11.938 | 0.406 | 5.56 | 5.044 | 0.258 | 8.00 | 40 | 35.80 |
| 12 × 4 | 12.75 | 11.938 | 0.406 | 4.50 | 4.026 | 0.237 | 8.00 | 40 | 35.80 |
| 14 × 12 | 14.00 | 13.124 | 0.438 | 12.75 | 11.938 | 0.406 | 13.00 | 40 | 68.60 |
| 14 × 10 | 14.00 | 13.124 | 0.438 | 10.75 | 10.020 | 0.365 | 13.00 | 40 | 68.60 |
| 14 × 8 | 14.00 | 13.124 | 0.438 | 8.62 | 7.976 | 0.322 | 13.00 | 40 | 68.60 |
| 14 × 6 | 14.00 | 13.124 | 0.438 | 6.62 | 6.060 | 0.280 | 13.00 | 40 | 68.60 |
| 16 × 14 | 16.00 | 15.000 | 0.500 | 14.00 | 13.124 | 0.438 | 14.00 | 40 | 96.50 |
| 16 × 12 | 16.00 | 15.000 | 0.500 | 12.75 | 11.938 | 0.406 | 14.00 | 40 | 96.50 |
| 16 × 10 | 16.00 | 15.000 | 0.500 | 10.75 | 10.020 | 0.365 | 14.00 | 40 | 96.50 |
| 16 × 8 | 16.00 | 15.000 | 0.500 | 8.62 | 7.976 | 0.322 | 14.00 | 40 | 96.50 |
| 16 × 6 | 16.00 | 15.000 | 0.500 | 6.62 | 6.060 | 0.280 | 14.00 | 40 | 96.50 |
| 18 × 16 | 18.00 | 16.876 | 0.562 | 16.00 | 15.000 | 0.500 | 15.00 | 40 | 131.00 |
| 18 × 14 | 18.00 | 16.876 | 0.562 | 14.00 | 13.124 | 0.438 | 15.00 | 40 | 131.00 |
Schedule 40 (cont.)
| Nom. Size | O.D. | LARGE DIAMETER I.D. | T | O.D. | SMALL DIAMETER I.D. | T | Length L | Pipe Sched. No. | Approx. Wt. Lbs. |
|---|---|---|---|---|---|---|---|---|---|
| 18 × 12 | 18.00 | 16.876 | 0.562 | 12.75 | 11.938 | 0.406 | 15.00 | 40 | 131.00 |
| 18 × 10 | 18.00 | 16.876 | 0.562 | 10.75 | 10.020 | 0.365 | 15.00 | 40 | 131.00 |
| 18 × 8 | 18.00 | 16.876 | 0.562 | 8.62 | 7.976 | 0.322 | 15.00 | 40 | 131.00 |
| 20 × 18 | 20.00 | 18.812 | 0.594 | 18.00 | 16.876 | 0.562 | 20.00 | 40 | 205.00 |
| 20 × 16 | 20.00 | 18.812 | 0.594 | 16.00 | 15.000 | 0.500 | 20.00 | 40 | 205.00 |
| 20 × 14 | 20.00 | 18.812 | 0.594 | 14.00 | 13.124 | 0.438 | 20.00 | 40 | 205.00 |
| 20 × 12 | 20.00 | 18.812 | 0.594 | 12.75 | 11.938 | 0.406 | 20.00 | 40 | 205.00 |
| 20 × 10 | 20.00 | 18.812 | 0.594 | 10.75 | 10.020 | 0.365 | 20.00 | 40 | 205.00 |
| 20 × 8 | 20.00 | 18.812 | 0.594 | 8.62 | 7.976 | 0.322 | 20.00 | 40 | 205.00 |
| 24 × 20 | 24.00 | 22.624 | 0.688 | 20.00 | 18.812 | 0.594 | 20.00 | 40 | 285.00 |
| 24 × 18 | 24.00 | 22.624 | 0.688 | 18.00 | 16.876 | 0.562 | 20.00 | 40 | 285.00 |
| 24 × 16 | 24.00 | 22.624 | 0.688 | 16.00 | 15.000 | 0.500 | 20.00 | 40 | 285.00 |
| 24 × 14 | 24.00 | 22.624 | 0.688 | 14.00 | 13.124 | 0.438 | 20.00 | 40 | 285.00 |
| 24 × 12 | 24.00 | 22.624 | 0.688 | 12.75 | 11.938 | 0.406 | 20.00 | 40 | 285.00 |
| 24 × 10 | 24.00 | 22.624 | 0.688 | 10.75 | 10.020 | 0.365 | 20.00 | 40 | 285.00 |
Schedule 80
| Nom. Size | O.D. FOR DIMENSION SPECIFICATIONS ½ | LARGE DIAMETER I.D. | T | O.D. ″ THROUGH 8 | SMALL DIAMETER I.D. ″ | T REFER TO SCHEDULE XS | Length L | Pipe Sched. No. | Approx. Wt. Lbs. |
|---|---|---|---|---|---|---|---|---|---|
| 10 × 8 | 10.75 | 9.562 | 0.594 | 8.62 | 7.620 | 0.500 | 7.00 | 80 | 37.50 |
| 10 × 6 | 10.75 | 9.562 | 0.594 | 6.62 | 5.756 | 0.432 | 7.00 | 80 | 37.50 |
| 10 × 5 | 10.75 | 9.562 | 0.594 | 5.56 | 4.810 | 0.375 | 7.00 | 80 | 37.50 |
| 10 × 4 | 10.75 | 9.562 | 0.594 | 4.50 | 3.826 | 0.337 | 7.00 | 80 | 37.50 |
| 12 × 10 | 12.75 | 11.374 | 0.688 | 10.75 | 9.562 | 0.594 | 8.00 | 80 | 59.00 |
| 12 × 8 | 12.75 | 11.374 | 0.688 | 8.62 | 7.620 | 0.500 | 8.00 | 80 | 59.00 |
| 12 × 6 | 12.75 | 11.374 | 0.688 | 6.62 | 5.756 | 0.432 | 8.00 | 80 | 59.00 |
| 12 × 5 | 12.75 | 11.374 | 0.688 | 5.56 | 4.810 | 0.375 | 8.00 | 80 | 59.00 |
| 12 × 4 | 12.75 | 11.374 | 0.688 | 4.50 | 3.826 | 0.337 | 8.00 | 80 | 59.00 |
| 14 × 12 | 14.00 | 12.500 | 0.750 | 12.75 | 11.374 | 0.688 | 13.00 | 80 | 115.00 |
| 14 × 10 | 14.00 | 12.500 | 0.750 | 10.75 | 9.562 | 0.594 | 13.00 | 80 | 115.00 |
| 14 × 8 | 14.00 | 12.500 | 0.750 | 8.62 | 7.620 | 0.500 | 13.00 | 80 | 115.00 |
| 14 × 6 | 14.00 | 12.500 | 0.750 | 6.62 | 5.756 | 0.432 | 13.00 | 80 | 115.00 |
| 16 × 14 | 16.00 | 14.312 | 0.844 | 14.00 | 12.500 | 0.750 | 14.00 | 80 | 159.00 |
| 16 × 12 | 16.00 | 14.312 | 0.844 | 12.75 | 11.374 | 0.688 | 14.00 | 80 | 159.00 |
| 16 × 10 | 16.00 | 14.312 | 0.844 | 10.75 | 9.562 | 0.594 | 14.00 | 80 | 159.00 |
| 16 × 8 | 16.00 | 14.312 | 0.844 | 8.62 | 7.620 | 0.500 | 14.00 | 80 | 159.00 |
| 16 × 6 | 16.00 | 14.312 | 0.844 | 6.62 | 5.756 | 0.432 | 14.00 | 80 | 159.00 |
Schedule 80 (cont.)
| Nom. Size | O.D. | LARGE DIAMETER I.D. | T | O.D. | SMALL DIAMETER I.D. | T | Length L | Pipe Sched. No. | Approx. Wt. Lbs. |
|---|---|---|---|---|---|---|---|---|---|
| 18 × 16 | 18.00 | 16.124 | 0.938 | 16.00 | 14.312 | 0.844 | 15.00 | 80 | 213.00 |
| 18 × 14 | 18.00 | 16.124 | 0.938 | 14.00 | 12.500 | 0.750 | 15.00 | 80 | 213.00 |
| 18 × 12 | 18.00 | 16.124 | 0.938 | 12.75 | 11.374 | 0.688 | 15.00 | 80 | 213.00 |
| 18 × 10 | 18.00 | 16.124 | 0.938 | 10.75 | 9.562 | 0.594 | 15.00 | 80 | 213.00 |
| 18 × 8 | 18.00 | 16.124 | 0.938 | 8.62 | 7.620 | 0.500 | 15.00 | 80 | 213.00 |
| 20 × 18 | 20.00 | 17.938 | 1.031 | 18.00 | 16.124 | 0.938 | 20.00 | 80 | 348.00 |
| 20 × 16 | 20.00 | 17.938 | 1.031 | 16.00 | 14.312 | 0.844 | 20.00 | 80 | 348.00 |
| 20 × 14 | 20.00 | 17.938 | 1.031 | 14.00 | 12.500 | 0.750 | 20.00 | 80 | 348.00 |
| 20 × 12 | 20.00 | 17.938 | 1.031 | 12.75 | 11.374 | 0.688 | 20.00 | 80 | 348.00 |
| 20 × 10 | 20.00 | 17.938 | 1.031 | 10.75 | 9.562 | 0.594 | 20.00 | 80 | 348.00 |
| 20 × 8 | 20.00 | 17.938 | 1.031 | 8.62 | 7.620 | 0.500 | 20.00 | 80 | 348.00 |
| 24 × 20 | 24.00 | 21.562 | 1.219 | 20.00 | 17.938 | 1.031 | 20.00 | 80 | 494.00 |
| 24 × 18 | 24.00 | 21.562 | 1.219 | 18.00 | 16.124 | 0.938 | 20.00 | 80 | 494.00 |
| 24 × 16 | 24.00 | 21.562 | 1.219 | 16.00 | 14.312 | 0.844 | 20.00 | 80 | 494.00 |
| 24 × 14 | 24.00 | 21.562 | 1.219 | 14.00 | 12.500 | 0.750 | 20.00 | 80 | 494.00 |
| 24 × 12 | 24.00 | 21.562 | 1.219 | 12.75 | 11.374 | 0.688 | 20.00 | 80 | 494.00 |
| 24 × 10 | 24.00 | 21.562 | 1.219 | 10.75 | 9.562 | 0.594 | 20.00 | 80 | 494.00 |
Schedule 160
| Nom. Size | O.D. | LARGE DIAMETER I.D. | T | O.D. | SMALL DIAMETER I.D. | T | Length L | Pipe Sched. No. | Approx. Wt. Lbs. |
|---|---|---|---|---|---|---|---|---|---|
| ¾ × ½ | 1.05 | 0.612 | 0.219 | 0.84 | 0.464 | 0.188 | 1.50 | 160 | 0.37 |
| 1 × ¾ | 1.32 | 0.820 | 0.250 | 1.05 | 0.612 | 0.219 | 2.00 | 160 | 0.45 |
| 1 × ½ | 1.32 | 0.820 | 0.250 | 0.84 | 0.464 | 0.188 | 2.00 | 160 | 0.45 |
| 1¼ × 1 | 1.66 | 1.160 | 0.250 | 1.32 | 0.820 | 0.250 | 2.00 | 160 | 0.70 |
| 1¼ × ¾ | 1.66 | 1.160 | 0.250 | 1.05 | 0.612 | 0.219 | 2.00 | 160 | 0.70 |
| 1¼ × ½ | 1.66 | 1.160 | 0.250 | 0.84 | 0.464 | 0.188 | 2.00 | 160 | 0.70 |
| 1½ × 1¼ | 1.90 | 1.338 | 0.281 | 1.66 | 1.160 | 0.250 | 2.50 | 160 | 0.90 |
| 1½ × 1 | 1.90 | 1.338 | 0.281 | 1.32 | 0.820 | 0.250 | 2.50 | 160 | 0.90 |
| 1½ × ¾ | 1.90 | 1.338 | 0.281 | 1.05 | 0.612 | 0.219 | 2.50 | 160 | 0.90 |
| 1½ × ½ | 1.90 | 1.338 | 0.281 | 0.84 | 0.464 | 0.188 | 2.50 | 160 | 0.90 |
| 2 × 1½ | 2.38 | 1.692 | 0.344 | 1.90 | 1.338 | 0.281 | 3.00 | 160 | 1.85 |
| 2 × 1¼ | 2.38 | 1.692 | 0.344 | 1.66 | 1.160 | 0.250 | 3.00 | 160 | 1.85 |
| 2 × 1 | 2.38 | 1.692 | 0.344 | 1.32 | 0.820 | 0.250 | 3.00 | 160 | 1.85 |
| 2 × ¾ | 2.38 | 1.692 | 0.344 | 1.05 | 0.612 | 0.219 | 3.00 | 160 | 1.50 |
| 2½ × 2 | 2.88 | 2.130 | 0.375 | 2.38 | 1.692 | 0.344 | 3.50 | 160 | 3.00 |
| 2½ × 1½ | 2.88 | 2.130 | 0.375 | 1.90 | 1.338 | 0.281 | 3.50 | 160 | 3.00 |
| 2½ × 1¼ | 2.88 | 2.130 | 0.375 | 1.66 | 1.160 | 0.250 | 3.50 | 160 | 2.80 |
| 2½ × 1 | 2.88 | 2.130 | 0.375 | 1.32 | 0.820 | 0.250 | 3.50 | 160 | 2.80 |
| 3 × 2½ | 3.50 | 2.624 | 0.438 | 2.88 | 2.130 | 0.375 | 3.50 | 160 | 4.00 |
| 3 × 2 | 3.50 | 2.624 | 0.438 | 2.38 | 1.692 | 0.344 | 3.50 | 160 | 4.00 |
| 3 × 1½ | 3.50 | 2.624 | 0.438 | 1.90 | 1.338 | 0.281 | 3.50 | 160 | 4.00 |
| 3 × 1¼ | 3.50 | 2.624 | 0.438 | 1.66 | 1.160 | 0.250 | 3.50 | 160 | 3.50 |
| 3 × 1 | 3.50 | 2.624 | 0.438 | 1.32 | 0.820 | 0.250 | 3.50 | 160 | 3.50 |
| 4 × 3 | 4.50 | 3.438 | 0.531 | 3.50 | 2.624 | 0.438 | 4.00 | 160 | 6.00 |
| 4 × 2½ | 4.50 | 3.438 | 0.531 | 2.88 | 2.130 | 0.375 | 4.00 | 160 | 6.00 |
| 4 × 2 | 4.50 | 3.438 | 0.531 | 2.38 | 1.692 | 0.344 | 4.00 | 160 | 5.00 |
Schedule 160 (cont.)
| Nom. Size | O.D. | LARGE DIAMETER I.D. | T | O.D. | SMALL DIAMETER I.D. | T | Length L | Pipe Sched. No. | Approx. Wt. Lbs. |
|---|---|---|---|---|---|---|---|---|---|
| 4 × 1½ | 4.50 | 3.438 | 0.531 | 1.90 | 1.338 | 0.281 | 4.00 | 160 | 5.00 |
| 4 × 1¼ | 4.50 | 3.438 | 0.531 | 1.66 | 1.160 | 0.250 | 4.00 | 160 | 5.00 |
| 4 × 1 | 4.50 | 3.438 | 0.531 | 1.32 | 0.820 | 0.250 | 4.00 | 160 | 5.00 |
| 5 × 4 | 5.56 | 4.310 | 0.625 | 4.50 | 3.438 | 0.531 | 5.00 | 160 | 14.00 |
| 5 × 3 | 5.56 | 4.310 | 0.625 | 3.50 | 2.624 | 0.438 | 5.00 | 160 | 14.00 |
| 5 × 2½ | 5.56 | 4.310 | 0.625 | 2.88 | 2.130 | 0.375 | 5.00 | 160 | 14.00 |
| 5 × 2 | 5.56 | 4.310 | 0.625 | 2.38 | 1.692 | 0.344 | 5.00 | 160 | 14.00 |
| 6 × 5 | 6.62 | 5.182 | 0.719 | 5.56 | 4.310 | 0.625 | 5.50 | 160 | 18.00 |
| 6 × 4 | 6.62 | 5.182 | 0.719 | 4.50 | 3.438 | 0.531 | 5.50 | 160 | 18.00 |
| 6 × 3 | 6.62 | 5.182 | 0.719 | 3.50 | 2.624 | 0.438 | 5.50 | 160 | 15.50 |
| 6 × 2½ | 6.62 | 5.182 | 0.719 | 2.88 | 2.130 | 0.375 | 5.50 | 160 | 15.50 |
| 6 × 2 | 6.62 | 5.182 | 0.719 | 2.38 | 1.692 | 0.344 | 5.50 | 160 | 15.00 |
| 8 × 6 | 8.62 | 6.808 | 0.906 | 6.62 | 5.182 | 0.719 | 6.00 | 160 | 31.50 |
| 8 × 5 | 8.62 | 6.808 | 0.906 | 5.56 | 4.310 | 0.625 | 6.00 | 160 | 28.00 |
| 8 × 4 | 8.62 | 6.808 | 0.906 | 4.50 | 3.438 | 0.531 | 6.00 | 160 | 28.00 |
| 8 × 3 | 8.62 | 6.808 | 0.906 | 3.50 | 2.624 | 0.438 | 6.00 | 160 | 30.00 |
| 10 × 8 | 10.75 | 8.500 | 1.125 | 8.62 | 6.808 | 0.906 | 7.00 | 160 | 58.00 |
| 10 × 6 | 10.75 | 8.500 | 1.125 | 6.62 | 5.182 | 0.719 | 7.00 | 160 | 58.00 |
| 10 × 5 | 10.75 | 8.500 | 1.125 | 5.56 | 4.310 | 0.625 | 7.00 | 160 | 54.00 |
| 10 × 4 | 10.75 | 8.500 | 1.125 | 4.50 | 3.438 | 0.531 | 7.00 | 160 | 52.00 |
| 12 × 10 | 12.75 | 10.126 | 1.312 | 10.75 | 8.500 | 1.125 | 8.00 | 160 | 95.00 |
| 12 × 8 | 12.75 | 10.126 | 1.312 | 8.62 | 6.808 | 0.906 | 8.00 | 160 | 85.00 |
| 12 × 6 | 12.75 | 10.126 | 1.312 | 6.62 | 5.182 | 0.719 | 8.00 | 160 | 80.00 |
| 12 × 5 | 12.75 | 10.126 | 1.312 | 5.56 | 4.310 | 0.625 | 8.00 | 160 | 80.00 |
| 12 × 4 | 12.75 | 10.126 | 1.312 | 4.50 | 3.438 | 0.531 | 8.00 | 160 | 80.00 |
| 14 × 12 | 14.00 | 11.188 | 1.406 | 12.75 | 10.126 | 1.312 | 13.00 | 160 | 115.00 |
Schedule 160 (cont.)
| Nom. Size | O.D. | LARGE DIAMETER I.D. | T | O.D. | SMALL DIAMETER I.D. | T | Length L | Pipe Sched. No. | Approx. Wt. Lbs. |
|---|---|---|---|---|---|---|---|---|---|
| 14 × 10 | 14.00 | 11.188 | 1.406 | 10.75 | 8.500 | 1.125 | 13.00 | 160 | 115.00 |
| 14 × 8 | 14.00 | 11.188 | 1.406 | 8.62 | 6.808 | 0.906 | 13.00 | 160 | 159.00 |
| 14 × 6 | 14.00 | 11.188 | 1.406 | 6.62 | 5.182 | 0.719 | 13.00 | 160 | 159.00 |
| 16 × 14 | 16.00 | 12.812 | 1.594 | 14.00 | 11.188 | 1.406 | 14.00 | 160 | 159.00 |
| 16 × 12 | 16.00 | 12.812 | 1.594 | 12.75 | 10.126 | 1.312 | 14.00 | 160 | 159.00 |
| 16 × 10 | 16.00 | 12.812 | 1.594 | 10.75 | 8.500 | 1.125 | 14.00 | 160 | 159.00 |
| 16 × 8 | 16.00 | 12.812 | 1.594 | 8.62 | 6.808 | 0.906 | 14.00 | 160 | 213.00 |
| 16 × 6 | 16.00 | 12.812 | 1.594 | 6.62 | 5.182 | 0.719 | 14.00 | 160 | 213.00 |
| 18 × 16 | 18.00 | 14.438 | 1.781 | 16.00 | 12.812 | 1.594 | 15.00 | 160 | 213.00 |
| 18 × 14 | 18.00 | 14.438 | 1.781 | 14.00 | 11.188 | 1.406 | 15.00 | 160 | 213.00 |
| 18 × 12 | 18.00 | 14.438 | 1.781 | 12.75 | 10.126 | 1.312 | 15.00 | 160 | 213.00 |
| 18 × 10 | 18.00 | 14.438 | 1.781 | 10.75 | 8.500 | 1.125 | 15.00 | 160 | 348.00 |
| 18 × 8 | 18.00 | 14.438 | 1.781 | 8.62 | 6.808 | 0.906 | 15.00 | 160 | 327.00 |
| 20 × 18 | 20.00 | 16.062 | 1.969 | 18.00 | 14.438 | 1.781 | 20.00 | 160 | 348.00 |
| 20 × 16 | 20.00 | 16.062 | 1.969 | 16.00 | 12.812 | 1.594 | 20.00 | 160 | 348.00 |
| 20 × 14 | 20.00 | 16.062 | 1.969 | 14.00 | 11.188 | 1.406 | 20.00 | 160 | 494.00 |
| 20 × 12 | 20.00 | 16.062 | 1.969 | 12.75 | 10.126 | 1.312 | 20.00 | 160 | 494.00 |
| 20 × 10 | 20.00 | 16.062 | 1.969 | 10.75 | 8.500 | 1.125 | 20.00 | 160 | 494.00 |
| 24 × 20 | 24.00 | 19.312 | 2.344 | 20.00 | 16.062 | 1.969 | 20.00 | 160 | 494.00 |
| 24 × 18 | 24.00 | 19.312 | 2.344 | 18.00 | 14.438 | 1.781 | 20.00 | 160 | 535.00 |
| 24 × 16 | 24.00 | 19.312 | 2.344 | 16.00 | 12.812 | 1.594 | 20.00 | 160 | 535.00 |
| 24 × 14 | 24.00 | 19.312 | 2.344 | 14.00 | 11.188 | 1.406 | 20.00 | 160 | 535.00 |
| 24 × 12 | 24.00 | 19.312 | 2.344 | 12.75 | 10.126 | 1.312 | 20.00 | 160 | 535.00 |
| 24 × 10 | 24.00 | 19.312 | 2.344 | 10.75 | 8.500 | 1.125 | 20.00 | 160 | 535.00 |
Schedule XXS
| Nom. Size | O.D. | LARGE DIAMETER I.D. | T | O.D. | SMALL DIAMETER I.D. | T | Length L | Pipe Sched. No. | Approx. Wt. Lbs. |
|---|---|---|---|---|---|---|---|---|---|
| ¾ × ½ | 1.05 | 0.434 | 0.308 | 0.84 | 0.252 | 0.294 | 1.50 | * | 0.39 |
| 1 × ¾ | 1.32 | 0.604 | 0.358 | 1.05 | 0.434 | 0.308 | 2.00 | * | 0.50 |
| 1 × ½ | 1.32 | 0.604 | 0.358 | 0.84 | 0.252 | 0.294 | 2.00 | * | 0.50 |
| 1¼ × 1 | 1.66 | 0.896 | 0.382 | 1.32 | 0.604 | 0.358 | 2.00 | * | 0.75 |
| 1¼ × ¾ | 1.66 | 0.896 | 0.382 | 1.05 | 0.434 | 0.308 | 2.00 | * | 0.75 |
| 1¼ × ½ | 1.66 | 0.896 | 0.382 | 0.84 | 0.252 | 0.294 | 2.00 | * | 0.75 |
| 1½ × 1¼ | 1.90 | 1.100 | 0.400 | 1.66 | 0.896 | 0.382 | 2.50 | * | 1.00 |
| 1½ × 1 | 1.90 | 1.100 | 0.400 | 1.32 | 0.604 | 0.358 | 2.50 | * | 1.00 |
| 1½ × ¾ | 1.90 | 1.100 | 0.400 | 1.05 | 0.434 | 0.308 | 2.50 | * | 1.00 |
| 1½ × ½ | 1.90 | 1.100 | 0.400 | 0.84 | 0.252 | 0.294 | 2.50 | * | 1.00 |
| 2 × 1½ | 2.38 | 1.508 | 0.436 | 1.90 | 1.100 | 0.400 | 3.00 | * | 2.00 |
| 2 × 1¼ | 2.38 | 1.508 | 0.436 | 1.66 | 0.896 | 0.382 | 3.00 | * | 2.00 |
| 2 × 1 | 2.38 | 1.508 | 0.436 | 1.32 | 0.604 | 0.358 | 3.00 | * | 2.00 |
| 2 × ¾ | 2.38 | 1.508 | 0.436 | 1.05 | 0.434 | 0.308 | 3.00 | * | 1.75 |
| 2½ × 2 | 2.88 | 1.776 | 0.552 | 2.38 | 1.508 | 0.436 | 3.50 | * | 4.00 |
| 2½ × 1½ | 2.88 | 1.776 | 0.552 | 1.90 | 1.100 | 0.400 | 3.50 | * | 4.00 |
| 2½ × 1¼ | 2.88 | 1.776 | 0.552 | 1.66 | 0.896 | 0.382 | 3.50 | * | 3.50 |
| 2½ × 1 | 2.88 | 1.776 | 0.552 | 1.32 | 0.604 | 0.358 | 3.50 | * | 3.50 |
| 3 × 2½ | 3.50 | 2.300 | 0.600 | 2.88 | 1.776 | 0.552 | 3.50 | * | 5.00 |
| 3 × 2 | 3.50 | 2.300 | 0.600 | 2.38 | 1.508 | 0.436 | 3.50 | * | 5.00 |
| 3 × 1½ | 3.50 | 2.300 | 0.600 | 1.90 | 1.100 | 0.400 | 3.50 | * | 5.00 |
| 3 × 1¼ | 3.50 | 2.300 | 0.600 | 1.66 | 0.896 | 0.382 | 3.50 | * | 4.50 |
| 3 × 1 | 3.50 | 2.300 | 0.600 | 1.32 | 0.604 | 0.358 | 3.50 | * | 4.50 |
| 4 × 3 | 4.50 | 3.152 | 0.674 | 3.50 | 2.300 | 0.600 | 4.00 | * | 8.00 |
| 4 × 2½ | 4.50 | 3.152 | 0.674 | 2.88 | 1.776 | 0.552 | 4.00 | * | 8.00 |
| 4 × 2 | 4.50 | 3.152 | 0.674 | 2.38 | 1.508 | 0.436 | 4.00 | * | 7.50 |
Schedule XXS (cont.)
| Nom. Size | O.D. | LARGE DIAMETER I.D. | T | O.D. | SMALL DIAMETER I.D. | T | Length L | Pipe Sched. No. | Approx. Wt. Lbs. |
|---|---|---|---|---|---|---|---|---|---|
| 4 × 1½ | 4.50 | 3.152 | 0.674 | 1.90 | 1.100 | 0.400 | 4.00 | * | 7.50 |
| 4 × 1¼ | 4.50 | 3.152 | 0.674 | 1.66 | 0.896 | 0.382 | 4.00 | * | 7.50 |
| 4 × 1 | 4.50 | 3.152 | 0.674 | 1.32 | 0.604 | 0.358 | 4.00 | * | 7.00 |
| 5 × 4 | 5.56 | 4.060 | 0.750 | 4.50 | 3.152 | 0.674 | 5.00 | * | 16.00 |
| 5 × 3 | 5.56 | 4.060 | 0.750 | 3.50 | 2.300 | 0.600 | 5.00 | * | 16.00 |
| 5 × 2½ | 5.56 | 4.060 | 0.750 | 2.88 | 1.776 | 0.552 | 5.00 | * | 16.00 |
| 5 × 2 | 5.56 | 4.060 | 0.750 | 2.38 | 1.508 | 0.436 | 5.00 | * | 16.00 |
| 6 × 5 | 6.62 | 4.892 | 0.864 | 5.56 | 4.060 | 0.750 | 5.50 | * | 23.00 |
| 6 × 4 | 6.62 | 4.892 | 0.864 | 4.50 | 3.152 | 0.674 | 5.50 | * | 23.00 |
| 6 × 3 | 6.62 | 4.892 | 0.864 | 3.50 | 2.300 | 0.600 | 5.50 | * | 20.00 |
| 6 × 2½ | 6.62 | 4.892 | 0.864 | 2.88 | 1.776 | 0.552 | 5.50 | * | 20.00 |
| 6 × 2 | 6.62 | 4.892 | 0.864 | 2.38 | 1.508 | 0.436 | 5.50 | * | 19.00 |
| 8 × 6 | 8.62 | 6.870 | 0.875 | 6.62 | 4.892 | 0.864 | 6.00 | * | 36.00 |
| 8 × 5 | 8.62 | 6.870 | 0.875 | 5.56 | 4.060 | 0.750 | 6.00 | * | 33.00 |
| 8 × 4 | 8.62 | 6.870 | 0.875 | 4.50 | 3.152 | 0.674 | 6.00 | * | 33.00 |
| 8 × 3 | 8.62 | 6.870 | 0.875 | 3.50 | 2.300 | 0.600 | 6.00 | * | 33.00 |
| 10 × 8 | 10.75 | 8.750 | 1.000 | 8.62 | 6.870 | 0.875 | 7.00 | * | 48.00 |
| 10 × 6 | 10.75 | 8.750 | 1.000 | 6.62 | 4.892 | 0.864 | 7.00 | * | 58.00 |
| 10 × 5 | 10.75 | 8.750 | 1.000 | 5.56 | 4.060 | 0.750 | 7.00 | * | 54.00 |
| 10 × 4 | 10.75 | 8.750 | 1.000 | 4.50 | 3.152 | 0.674 | 7.00 | * | 52.00 |
| 12 × 10 | 12.75 | 10.750 | 1.000 | 10.75 | 8.750 | 1.000 | 8.00 | * | 95.00 |
| 12 × 8 | 12.75 | 10.750 | 1.000 | 8.62 | 6.870 | 0.875 | 8.00 | * | 85.00 |
| 12 × 6 | 12.75 | 10.750 | 1.000 | 6.62 | 4.892 | 0.864 | 8.00 | * | 80.00 |
| 12 × 5 | 12.75 | 10.750 | 1.000 | 5.56 | 4.060 | 0.750 | 8.00 | * | 80.00 |
| 12 × 4 | 12.75 | 10.750 | 1.000 | 4.50 | 3.152 | 0.674 | 8.00 | * | 80.00 |
Materials We Supply
Concentric & Eccentric Reducers to ASME B16.9 in the grades below. Tell us the service and we will confirm the right one.
| Material | Specification | Typical Service |
|---|---|---|
| Carbon Steel | ASTM A234 WPB / WPC | General process, steam, oil and gas gathering and utility lines |
| Low-Temp Carbon Steel | ASTM A420 WPL6 | Cold service to −50°F; LNG and northern pipeline work |
| Chrome-Moly Alloy | ASTM A234 WP11 / WP22 / WP91 | Elevated temperature; refinery heaters, power plant steam |
| Stainless Steel | ASTM A403 WP304/304L, WP316/316L | Corrosive service, chemical, food and beverage, water treatment |
| Duplex & Super Duplex | ASTM A815 UNS S31803 / S32750 | Chloride and seawater service, offshore, desalination |
Common Questions
What is the difference between a concentric and an eccentric reducer?
A concentric reducer keeps both ends on the same centerline, so the size change is symmetrical. An eccentric reducer offsets the centerlines so one side of the fitting stays flat and in line with the pipe. On horizontal runs that flat side is what stops vapour or liquid being trapped at the size change.
Why is an eccentric reducer used on pump suction?
Installed flat side up, it keeps the top of the suction line level through the size change so air cannot collect in a high pocket ahead of the pump. Trapped vapour entering a pump causes cavitation, loss of head, and impeller damage.
Which way up does an eccentric reducer go?
Flat side up on pump suction, to prevent vapour pockets. Flat side down where the priority is draining the line or keeping settling solids moving. The service dictates it, and the fitting must be installed accordingly.
How are reducers sized?
Large end × small end. A 6 × 4 reducer takes 6" pipe down to 4". The tables above give outside diameter, inside diameter, and wall thickness for both ends, plus the overall length L.
