Page 52 - Mechanical Products Installation Handbook IH-1000M

44 INSTALLATION INSTRUCTIONS HDPE Couplings
Figure 9094 HDPE Flange Coupling
Step 8. Add flange bolts and hand-tighten nuts. All the bolts shall be inserted from the same direction. Make sure that the oval neck of the bolt engages into the bolt hole of the housing.
Note: Flange Adapter Washers are required when the Figure 71 Flange Adapter is used against surfaces such as:
1. Rubber surfaces
2. Adapting to AWWA cast flanges 3. Rubber-faced wafer valves
4. Serrated flange surfaces
For additional information on Flange Adapter Washers, refer to the Grooved Couplings sec- tion of this manual.
Step 9. Tighten all nuts evenly as with a regular flange assembly, until faces contact firmly. Apply the recommended flange joint torque evenly to all the bolts. Mating Bolts and Nuts are not supplied.
Flange mating bolts must be at least SAE J429 Grade 5 or stronger. It is the responsibility of the purchaser to verify correct length for the intended application.
Step 8.
Step 9.