RE: Code Velocity Maximums Plastic Pipe Materials

From: <Geoff>
Date: Thu Aug 18 2005 - 17:20:00 EDT

Steve,

AS 3500.1.2 Plumbing and Drainage Code for Australia and New Zealand has an upper limit of 3 m/s (refer clause 3.4)

Geoff

Steve McKenzie <Mechproj@xtra.co.nz> wrote: Howdy
Cant help you with a Code upper limit (AWWA may be worth a look)but note you make mention of building services. For building services, we normally run a little larger than the economic diameter for reasons of (among others) noise control. If you are looking at high velocities in a building, look carefully at noise requirements as they can bite; I got bitten by a library. The problems of water hammer and pressure regulation you will already be aware of. I am currently running some PE gravity mains at 4.5 - 5 m/s (have head to burn, but flows arent large enough to justify any form of regeneration)without problems, but there are no valves or branches.

Cheers

Steve

-----Original Message-----
From: <a href="/group/PipingDesign/post?postID=7Haq8dY7r2bWTamj67ZOq1VnQYcvkGmJXUoXk84ROCdgausQH9NKIdVkNzAhx9-BdPsUxwTC_6DUiQskW-5TzxBvLQ">PipingDesign@yahoogroups.com</a> [mailto:<a href="/group/PipingDesign/post?postID=7Haq8dY7r2bWTamj67ZOq1VnQYcvkGmJXUoXk84ROCdgausQH9NKIdVkNzAhx9-BdPsUxwTC_6DUiQskW-5TzxBvLQ">PipingDesign@yahoogroups.com</a>] On Behalf Of blenrayaust
Sent: Thursday, August 18, 2005 7:52 PM
To: <a href="/group/PipingDesign/post?postID=7Haq8dY7r2bWTamj67ZOq1VnQYcvkGmJXUoXk84ROCdgausQH9NKIdVkNzAhx9-BdPsUxwTC_6DUiQskW-5TzxBvLQ">PipingDesign@yahoogroups.com</a> Subject: [PipingDesign] Code Velocity Maximums Plastic Pipe Materials

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.

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Received on Thu Aug 18 17:20:00 2005