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Sorry- it is mostly exposed except for 30'. Post edited to correct that. If I can't end up with conclusive results that this couldn't be something other than a leak, then I will confine the communications just to the contractor. I am going to chase the question about initial water temperature...

8 hours, but no mention of stabilization. It's very rare that I've seen any of these not move around some, but it's always been in the error bars. The temperature swing in this one is definitely more than I've encountered previously.

Thanks to all for your thoughts. Agreed that the fill should have been metered. There is no record of the initial water temperature, I assume it was somewhat warmer than 65F. I did take a look at average water temperature over time when I started trying to understand what might have been going...

Since so far it seems like there's still sufficient reason to not accept the test results, I'll invite opinions on another issue I'm having. My client for this job is the contractor who performed the test. When I warned them I wouldn't be able to sign off on this as a passing test, I got a...

Calculated- 615ft of 24" pipe + 16ft of 16".

Start to finish, disregarding the injections, yes, about 150psi sounds about right. Steel pipe, .375 wall. My bad- I got lazy after seeing how hosed-up the overall data looks, and didn't work the details on the injections. The first injection was 7.78 gallons, second one was 6.2 gallons. Fill...

Here is a look at the data over the full duration of the test. This includes the time before the last injection, while pipe temperature was measurably dropping. Over this period, the pressure drop rate is a little more steep than the allowable predicted, but not wildly off.

Correct, the test was started at night. The point where temperature reading rises to 60F is 7:30AM.

Thank you for the response Ted. Is this something you've dealt with in the field, to the extent of being comfortable accounting for it in calculating pass/fail criteria on a test? I haven't reviewed many of these, but have seen some. In other tests I've looked over, the response has been...

Hi all, I'm looking for a second (or more) set of eyes on some pipeline test data. The pipe in question is approximately 600ft of 24", mostly exposed except for a 30' section. Here is a chart of pipe temperature and pressure for the last hours of the test. Some of my own observations...