Re: Code Velocity Maximums Plastic Pipe Materials

ASME B31.3 does not specifically adress steady state velocities... however the higher the flowing the velocity the greater the water hammer possibilty. This to a great extent is reduced by the elastic walls of plastics but on the other hand they have less strength for surge pressures.

So before you start sending flow screaming down the line check the implications of this as far as water hammer is concerned... a good reference text is any of the books written by A.R. Thorley...

• In PipingDesign@yahoogroups.com, "blenrayaust" <blenrayaust@y...> wrote:
  > Please advise what Code limits there are for the use of plastic pipe
  > materials in building services. I am not looking for generalisations
  or
  > manufacturers ideas but hard and fast clauses that may appear in a
  > specification.
  >
  > The situation I have is where energy costs a fraction of what it
  does
  > in the USA and therefore the NPV of Capex and Opex is different. So
  > generalisations of maximum velocites are meaningless.