The mechanical joint works differently from other AMERICAN pipe joints in that no lubricant is used in the assembly process. The mechanical joint gland, which is made of ductile iron, is used to press the mechanical joint gasket into the bell. Then bolts or studs are threaded through the gland, squeezing the gasket into place. MJ glands can be specified when purchasing mechanical joint pipe, or they may be available as part of an MJ kit.
Size1 | Bolts | |
|---|---|---|
No. Per | Size2 | |
4 | 4 | 3/4 × 3-1/2 |
6 | 6 | 3/4 × 3-1/2 |
8 | 6 | 3/4 × 4 |
10 | 8 | 3/4 × 4 |
12 | 8 | 3/4 × 4 |
14 | 10 | 3/4 × 4-1/2 |
16 | 12 | 3/4 × 4-1/2 |
18 | 12 | 3/4 × 4-1/2 |
20 | 14 | 3/4 × 4-1/2 |
24 | 16 | 3/4 × 5 |
303 | 20 | 1 × 6 |
363 | 24 | 1 × 6 |
423 | 28 | 1-1/4 × 6-1/2 |
483 | 32 | 1-1/4 × 6-1/2 |
544 | 36 | 1-1/4 × 6-1/2 |
1.) AMERICAN no longer manufactures 2", 2 1⁄4" and 3" sizes of pipe; bolts required per joint for 2" and 2 1⁄4" sizes were 2 5⁄8" x 2 1⁄2", and for 3" size were 4 5⁄8" x 3".
2.) Bolts used with mechanical joint retainer glands may be required by the manufacturers of those devices to be longer than shown.
3.) 14"–48" mechanical joints are for fittings only.
4.) 54" Mechanical Joints are used only with special mechanical joint sleeves. This size is not in AWWA C110.
