SDM mounted in a weldolet (vertical mount)
2.5 Installation of the wafer (SDM-4 or SDM-5)
Mating components should be checked to assure that tolerances and engagements are compatible. Do
not use any components that appear irregular or do not fit properly. Contact the appropriate
manufacturer of the product in question to determine usability.
There are 2 types of wafers:
UHMWPE (Ultra High Molecular Weight Poly Ethylene) wafers, also called HDPE (High Density
Poly Ethylene) wafer, SDM-4 or SDM-5
Metal (i.e. AISI316, Hastelloy C276, etc.) wafers, SDM-4 or SDM-5
The only difference between UHMWPE wafers and metal wafers is the torque value of the bolts,
when mounted in a pipe. This is the reason that the UHMWPE wafer is mentioned separately. The
torque of the metal wafers (SDM-4 or SDM-5) is the same as the torque for spool piece (SDM-1).
See concerning chapter 2.3 spool installation for torques of metal wafers.
Vertical mounting (i.e. wafer)
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