Installation Manual - Future Pipe Industries

6. Flanged joints
Before assembling the Flanged Joints, all safety precautions will need to be checked. Ensure that all necessary tools
and materials are available. See chapter X. and 6.1.
6.1. Tools for flanged joints
Tools necessary for assembly of flanges:
A Ring spanner with required bolt head size.
B Torque wrench with required socket size.
6.2. Flanged joints
Fig. 6.2.a.
R.T.R.P. flanges are flat faced. These flanges must always be accurately aligned and not subject to any stress.
On the R.T.R.P. side of the flanged joint the bolts and nuts must have washers to avoid exceeding the permitted
surface pressure. As an alternative, a steel backing ring can be installed.
Pipes must not be pulled together by tightening the bolts. If an R.T.R.P. pipeline is connected to a metal pipe,
this metal pipe must be anchored to prevent any movement or loads being transmitted to the R.T.R.P. line.
Fig. 6.2.b.
When assembling a wafer-type butterfly valve, the bolts should be tightened first by hand. If leakage occurs during
pressure tests, the bolts can be tightened up to the max. values according table 6.a. page 27.
Wavistrong Installation Manual
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