Page 30 - Tyco-Grooved-Fire-Protection-Products-Installation-Handbook

28 INSTALLATION INSTRUCTIONS
Figure 577 Rigid Coupling 2 of 2
Step 4. Bring both pipe ends together, ensure proper alignment and slide the gasket into posi- tion, properly centering it between the grooved portions of each pipe.
NOTE
The gasket should not protrude into the grooves on either pipe segment or extend between the pipe ends.
Step 5. With one nut and bolt removed from the coupling housings, swing the coupling housing over the gasket. Verify that the housings are over the gasket and that the housing keys are fully engaged into the pipe grooves.
Step 6. Insert the other bolt and nut into the coupling and rotate both nuts until finger tight. Verify that the bolt heads are fully recessed in the housing.
Step 7. Tighten nuts uniformly to the recom- mended bolt torque.
NOTES
Uneven tightening can cause the gasket to pinch or bind. For proper bolt torques refer to Page 43 for Figure 577. Bolt torque informa- tion has been provided in accordance with the UL 213 “Standard For Rubber Gasketed Fittings For Fire Protection Service” (Refer to Page 12).
Refer to Technical Data Sheet TFP1854 for more information.
The 1-1/4” - 8” couplings have an intended gap of up to 1/16 inch at each pad to allow for posi- tive rigid gripping onto the pipe.