AMERICAN Fastite joint push-bar pipe, furnished in sizes 4" through 64", allows the AMERICAN Fastite joint to be used in trenchless installations using direct jacking or pushing (including high load installations such as microtunneling and some pipe-bursting applications).
Fastite push-bar pipe employs an economical adaptation of the premier AMERICAN Fastite joint to transfer jacking loads from the pipe barrel directly to the face of the bell. It consists of a high-strength alloy steel ring – the “push-bar” – shop welded to the standard Fastite pipe spigot. This ring is made of the same material that has been used successfully in AMERICAN’s Lok-Ring and other restrained joints since 1967. A cushioning compression ring, made of compressible wood products, fits between the push-bar and the pipe bell for added assurance of load distribution. The pipe comes in standard 20’ or less nominal laying lengths and carries the standard Fastite joint pressure ratings.
During installation, Fastite joint push-bar pipe is jacked or pushed with the spigots ahead. This allows for any debris remaining from the pipe bursting or pipe jacking operation to flow smoothly over the bell of the Fastite joint.
Pressure classes are defined as the hydrostatic water working pressure of the pipe in psi. The thicknesses shown are adequate for the rated hydrostatic working pressure plus a surge allowance of 100 psi with a safety factor of 2.0 for that sum. Calculations result in net thicknesses and are based on a minimum yield strength in tension of 42,000 psi and 2.0 safety factor times the sum of working pressure and 100 psi surge allowance.
Thickness can be calculated for rated hydrostatic working pressure and surges other than the above by use of equation 1 in ANSI/AWWA C150/A21.50.
AMERICAN ductile iron pipe is available for hydrostatic working pressures greater than 350 psi – for special applications, contact AMERICAN.
These are standard pressure classes as given in AWWA C150 and C151. AMERICAN can furnish any thickness in between these standard thicknesses if deemed desirable for major projects.
Size | Outside | Pressure Class | ||||
|---|---|---|---|---|---|---|
150 | 200 | 250 | 300 | 350 | ||
Nominal Thickness in Inches | ||||||
4 | 4.8 | - | - | - | - | 0.25 |
6 | 6.9 | - | - | - | - | 0.25 |
8 | 9.05 | - | - | - | - | 0.25 |
10 | 11.1 | - | - | - | - | 0.26 |
12 | 13.2 | - | - | - | - | 0.28 |
14 | 15.3 | - | - | 0.28 | 0.3 | 0.31 |
16 | 17.4 | - | - | 0.3 | 0.32 | 0.34 |
18 | 19.5 | - | - | 0.31 | 0.34 | 0.36 |
20 | 21.6 | - | - | 0.33 | 0.36 | 0.38 |
24 | 25.8 | - | 0.33 | 0.37 | 0.4 | 0.43 |
30 | 32 | 0.34 | 0.38 | 0.42 | 0.45 | 0.49 |
36 | 38.3 | 0.38 | 0.42 | 0.47 | 0.51 | 0.56 |
42 | 44.5 | 0.41 | 0.47 | 0.52 | 0.57 | 0.63 |
48 | 50.8 | 0.46 | 0.52 | 0.58 | 0.64 | 0.7 |
54 | 57.56 | 0.51 | 0.58 | 0.65 | 0.72 | 0.79 |
60 | 61.61 | 0.54 | 0.61 | 0.68 | 0.76 | 0.83 |
64 | 65.67 | 0.56 | 0.64 | 0.72 | 0.8 | 0.87 |
