FLEX User Instruction – 21TEM14546 EN
Page 15 of 43
Adapter pipes should be placed between the headers and FLEX units to provide a more robust
and forgiving connection than can be achieved by simply coupling the FLEX units directly to the
headers. The adapters should have grooved pipe connections on both ends and use flexible
split style couplings on both the header and FLEX connections. Refer to documentation from the
pipe coupling OEM for further guidance on proper piping design.
Material selection is important for both the high-pressure and low-pressure headers and adapter
pipes. High-pressure headers and piping are typically made of duplex or super duplex stainless
steel because of its corrosion resistance and strength. For the low-pressure headers and piping,
Flowserve recommends the use of Polyethylene (PE) or Polypropylene (PP) rather than
Polyvinylchloride (PVC) wherever possible.
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