Page 49 - Mechanical Products Installation Handbook IH-1000M

INSTALLATION INSTRUCTIONS 41 HDPE Couplings
Figure 9097 HDPE Transition Coupling
The pipe ends should always be butted together. Lubricate the back of the gasket as well as the sealing edges.
Note: The maximum allowed space between HDPE pipe and steel pipe is 0.25 inches (6.3 mm) on 2 to 4 inch pipe, and 0.3125 inches (7.9 mm) on 6 inch and larger pipe.
• CAUTION
To avoid injuries from sharp machined gripping teeth, wear protective gloves when handling couplings.
To prevent degradation of the polymer, do not use hydrocarbon-based oils, grease, or soap- based solutions.
Step 4. Place the housings over the gasket, ensuring the gasket stay centered between the marks made on the HDPE pipe and the groove of the IPS steel pipe.
Step 5. Insert the bolts and hand-tighten nuts. Make sure that the oval neck of the bolt engages into the bolt hole of the housing.
Step 6. Tighten nuts alternately and equally until the bolt pads meet and make metal-to-metal contact. Tighten nuts by another one quarter to one half turn to make sure the nuts and bolts are snug and secure. The use of a torque wrench is usually not required.
Note: Uneven tightening of bolts and nuts can cause the gasket to be pinched, resulting in an immediate or delayed leak.
Step 3b.
Step 4.
Step 5.
Step 6.