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Thank you for your reply. The loose liningwas apparently caused by damage in transit. We will be doing sectional pull off tests but were looking to see how significant the damage is or if it is very localized. We are planning to proceed with a swab in the pipe and pump water against it...

Hi All, We need to test a newly installed water distribution main. It is cement lined ductile iron (500mm). There are some issues with the mortar lining coming away from the pipe. The pipe hasn't been commissioned yet but we expect flows of 400-500l/s. We are worred about further...

Hi All, We need to test a newly installed distribution main. It is cement lined ductile iron (500mm). There are some issues with the mortar lining coming away from the pipe. The pipe hasnt been commissioned yet but we expect flows of 400-500l/s. We are worred avout further deterioration and...

Bimr, that was a great answer. To clarify,I amin asset management so pipe condition and lifetime assessment is my area. The original consultant designed along with your thinking. Unfortunately the contracted installed extremely sub standard assets. E.g consultant designed for 25 bar connections...

As it currently stands, the downhill pipe is fitted with PRVs at various points to keep the pressure down. (a 1000m head of water must have a significant pressure head no?) But the PRVs are cheap and of dubious source. If 1 fails then it could spell disaster. I'm in asset management and we are...

Thanks for the reply. The flow is downhill for the most part (from left to right) the break tanks are to ensure that the pressure doesn't get too high (pn16 flanges). Flow from each break tank to the next is downhill via gravity. To use haen-williams, do I not require the flow rate?

Thank you for the reply and the link. I would like to include friction losses at pipe entry and in the pipe itself. Any help for expanding on the information given in your solution? Thanks.

Hi All, I have what should be a simple problem but I can't get my head around it. I have a high level tank at elevation approx 1600m. A 350mm pipe runs down the valley to a low point of approx 600m and up to another tank on the other side at approx 800m. I would like to calculate the...