Specifications
| MODEL NUMBER | TUBE 1 OD | TUBE 2 OD | A | WALL THICKNESS |
| B-31W-100-075 | 1 | 3/4 | 1.38 | 0.065 |
| B-31W-150-075 | 11/2 | 3/4 | 2.38 | 0.065 |
| B-31W-150-100 | 11/2 | 1 | 2.38 | 0.065 |
| B-31W-200-100 | 2 | 1 | 2.38 | 0.065 |
| B-31W-200-150 | 2 | 11/2 | 2.38 | 0.065 |
| B-31W-250-150 | 21/2 | 11/2 | 2.38 | 0.065 |
| B-31W-250-200 | 21/2 | 2 | 2.38 | 0.065 |
| B-31W-300-150 | 3 | 11/2 | 3.62 | 0.065 |
| B-31W-300-200 | 3 | 2 | 3.62 | 0.065 |
| B-31W-300-250 | 3 | 21/2 | 3.62 | 0.065 |
| B-31W-400-150-B | 4 | 11/2 | 5.25 | 0.065 |
| B-31W-400-200 | 4 | 2 | 3.62 | 0.065 |
| B-31W-400-250 | 4 | 21/2 | 3.62 | 0.065 |
| B-31W-400-300 | 4 | 3 | 3.62 | 0.065 |
| B-31W-400-300 | 4 | 3 | 3.62 | 0.065 |
| B-31W-600-300-B | 6 | 3 | 5.50 | 0.065 |
| B-31W-600-400-B | 6 | 4 | 5.50 | 0.065 |
| B-31W-600-400-HW | 6 | 4 | 9.00 | 0.065 |
| B-31W-200-100-316L | 2 | 1 | 2.38 | 0.065 |
| B-31W-200-150-316L | 2 | 11/2 | 2.38 | 0.065 |
| B-31W-300-200-316L | 3 | 2 | 3.62 | 0.065 |
| B-31W-400-150-316L-B | 4 | 11/2 | 5.25 | 0.065 |
| B-31W-400-200-316L | 4 | 2 | 3.62 | 0.065 |
