One method of restraining a pipeline is to provide a welded-on thrust collar or other dependable anchorage means on one or both sides of the point requiring restraint and to use concrete poured around the collar for support against undisturbed soil surrounding the pipe.
At a bend, the fitting and pipe ends would have to be of a restrained type, adequate to withstand total thrust involved. The required number of thrust collars would be dependent on the magnitude of the thrust force to be restrained and the allowable load per collar.
Thrust collars are also used in lieu of water stops on fabricated wall pipe for installation in load-bearing walls to resist thrust caused by internal pressure.
Size | Minimum Dimensions in inches | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Flg-T/C-Flg | Flg-T/C-PE | PE-T/C-PE | MJ-T/C-MJ (Fab1) | MJ-T/C-PE | MJ-T/C-Flg | Fst-T/C-PE | Fst-T/C-Flg | ||||||
O.A./L.L. | O.A./L.L. | O.A./L.L. | O.A. | L.L. | O.A. | L.L. | O.A. | L.L. | O.A. | L.L.1 | O.A. | L.L.1 | |
4 | 8 | 8 | 8 | 10 | 4 5/8 | 8 | 5 1/2 | 8 | 5 1/2 | 8 | 4 11/16 | 8 | 4 5/8 |
6 | 8 | 8 | 8 | 10 | 4 5/8 | 8 | 5 1/2 | 8 | 5 1/2 | 8 | 4 5/8 | 8 | 4 5/8 |
8 | 8 | 8 | 8 | 10 | 4 5/8 | 8 | 5 1/2 | 8 | 5 1/2 | 4 1/4 | 8 | 4 1/4 | 4 1/4 |
10 | 8 | 8 | 8 | 10 | 4 5/8 | 8 | 5 1/2 | 10 | 7 1/2 | 8 | 4 1/4 | 7 1/4 | 3 1/2 |
12 | 8 | 8 | 8 | 10 | 4 5/8 | 8 | 5 1/2 | 10 | 7 1/2 | 8 | 4 1/4 | 7 1/4 | 3 1/2 |
14 | 8 1/2 | 8 | 8 | 12 | 4 1/2 | 8 | 4 1/2 | 11 | 7 1/2 | 8 | 2 3/4 | 9 3/4 | 4 1/2 |
16 | 8 1/2 | 8 | 8 | 12 | 4 1/2 | 8 | 4 1/2 | 11 1/2 | 8 | 8 | 2 3/4 | 9 3/4 | 4 1/2 |
18 | 8 1/2 | 8 | 8 | 12 | 4 1/2 | 8 | 4 1/2 | 12 | 8 1/2 | 8 | 1 1/2 | 10 | 4 1/2 |
20 | 8 1/2 | 8 | 8 | 12 | 4 1/2 | 8 | 4 1/2 | 12 | 8 1/2 | 8 | 1 1/2 | 10 | 4 1/2 |
24 | 9 1/2 | 8 | 8 | 12 | 4 1/2 | 8 | 4 1/2 | 12 | 8 1/2 | 8 | 1 1/2 | 10 | 4 1/2 |
30 | 12 | 10 1/2 | 8 | - | - | - | - | - | - | 8 | 1 1/2 | 12 | 5 1/2 |
36 | 14 | 11 1/2 | 8 | - | - | - | - | - | - | 8 | 1 1/2 | 12 | 5 1/2 |
42 | 16 | 12 | 8 | - | - | - | - | - | - | 8 1/2 | 1 | 14 | 6 1/2 |
48 | 16 | 12 | 8 | - | - | - | - | - | - | 9 | 1 | 15 | 7 |
54 | 18 | 16 | 8 | - | - | - | - | - | - | 9 1/2 | 1 | 16 | 7 1/2 |
60 | 18 | 16 | 8 | - | - | - | - | - | - | 9 3/4 | 1 | 16 | 7 1/4 |
64 | 18 | 16 | 8 | - | - | - | - | - | - | 10 | 1 | 16 | 7 |
1.) Thrust collars may not be located in exact center of all minimum length pieces shown above.
2.) Laying lengths are rounded to the nearest 1/4".
Flange–Thrust Collar–Flange and Flange–Thrust Collar–PE pipe may be furnished up to 20’-0" length (with the exception of 4" whose maximum length is 17’-6"). Contact AMERICAN if longer lengths required.
