RE: Pipe and Tube

From: <Steve>
Date: Tue Jun 03 2003 - 07:40:00 EDT

Hi CHETAN PRAJAPATI

The dimension for tube (e.g. 25mm, 2" etc) refers to the outside diameter. The dimension for pipe (e.g. 25mm NB, 2" etc) sort of refers to the clear inside diameter in normal sizes. However the outside diameter for a given pipe size is fixed so the internal diameter varies as the wall thickness. Why? Its a long story; I think Pauls PipingDesign.com site has a bit of a description as to the origin.Something to do with cast iron as I recall.

It is logical to keep the OD fixed and vary the ID. Saves heaps on the cost of U bolts preformed insulation etc and keeps the rest of us in a job predicting friction loss.

Cheers

Steve McKenzie

-----Original Message-----
From: CHETAN PRAJAPATI [mailto:cnpsnl@ltecd.ltindia.com] Sent: Tuesday, June 03, 2003 7:22 PM
To: PipingDesign@yahoogroups.com
Subject: [PipingDesign] Pipe and Tube

Can any one help that what is the basic difference betn Pipe and Tube.. How do these be specified .?
What r the ranges of each if any?

Thanks
Chetan

[Non-text portions of this message have been removed]

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Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ Received on Tue Jun 03 07:40:00 2003