Talk:Water pipe

Water pipe is measured by its OD in the UK. Is this true for elsewhere?

Yes it is.

no it isnt

In Ontario, Canada waterpipe (more commonly refered to as watermain) is measured using the inner diameter of the pipe. Metric is commonly used on blueprints, but English measurments still have their place (and supporters) on the jobsite. For example, 8" PVC watermain would be shown on the engineering blueprints as 203MM, while 6" sanitary/utility PV C would be shown as 150MM, a 2.4MM discrepancy that is understood and accepted given the non exacting tolerances than can be worked with in the industry. Markca 08:06, 29 December 2006 (UTC)

I have added ductile iron as a type of watermain, and added the more common PVC abbreviation to describe poly vinyl chloride Markca 23:54, 30 December 2006 (UTC)

In general, in large diameter supply or waste pipe, ID is used as an engineering specification to express actual volume handling need, but building code often requires something different. There are many custom pipe connecting schemes, and pipe surface and operating pressure can vastly affect liquid transfer capability. However, as in the article, when it is specified that a given type of has equal OD and different wall thickness, the volume of liquid that it contains statically is a simple mathematical formula not influenced by any other factor, and needs no citation. So, the statement that a 1/2" OD pipe with one wall thickness potentially contains more water than one with a thicker wall is a purely logical inference requiring no citation. —Preceding unsigned comment added by 24.32.132.199 (talk) 07:01, 7 December 2010 (UTC)

Threading vs flanging
Where is the transition point between pipe threading and pipe flanging, where there is a ring or lip at the pipe end, and which is bolted to the next pipe end? Is use of flanges based on pipe size, pressure, or some other reason? -- DMahalko (talk) 14:29, 18 January 2016 (UTC)