Instructions
1. For connecting to UHMWPE flange surfaces, choose a method for sealing:
a. No gasket (the UHMWPE forms its own gasket, see previous sections)
b. Full faced elastomer gasket of 1/8” or 2 to 3 mm thick. Shore A hardness of 70 typ.
2. Carefully align the pipe sections with the wafer in order to avoid stress at the flange surface of the
wafer. In addition, the piping must be secured and supported to prevent movement which can
create excess stress and flange face damage.
3. Once the gasket is in place, align the bolt holes of the wafer and the adjacent flange faces
4. Lightly lubricate and insert all bolts and washers and loosely apply the nuts
5. Number all bolts for record purposes
6. Make sure the faces of the mating surfaces are flush against gasket (if present) prior to bolting
down the flanges.
7. Tighten the nuts by hand until they are snug. Establish uniform pressure over the flange faces by
tightening the bolts in 7 Nm (5 ft.-lbs.) increments up to the stated “Initial Minimum Torque” in
the table below, following a 180° opposing crisscross sequence.
8. Reseat after 24 hours and record all final torque values
IMPORTANT:
Care must be taken to avoid “bending” the flange when joining a UWC wafer to a “raised face” flange.
In below table, torque values are given for Rhosonics wafers. These values assume the flanged joint
connects the wafer to a CLASS 150 flange, material UHMWPE.
To Next Page
Loading...
