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Thanks for all the tips folks. I'm going to be on a structured training program for over a year and it's not jam packed so I can make some time to do some snooping around on the intranet to see design, isometrics, equipment spec. sheets, and other engineering drawings. Just fyi, I'm in Canada...

Some background on me, right out of school I worked at an oil patch service company for a year and mostly worked on hydro-tests, leak tests, and other Nitrogen jobs (pipelines purges, pig runs, and accelerated cool downs), however the engineering for most of them was done by senior engineers...

Hi everyone, I graduated with a degree in Mechanical Engineering recently and I now work at a nuclear power plant as a plant operator (started 2 months ago). Even though my company is going to teach me everything about operations and then some, I'll never have the opportunity to work with...

Thanks guys, will definitely follow that advice if it comes to the point where I need a spool to go between the two pieces. I ordered both pieces as XXH wall so I shouldn't need to get a spool but now I know for next time.

LittleInch, Here's the story behind the globe valve. First, there used to be an orifice plate on the skids exit to the tanks. Basically, orifice plate followed by 6feet of the skids 6'' piping, then a 6'' onskid valve which had the changeover to the temporary hard pipe (hammer union...

I was looking up the wall thicknesses of schedule 160 vs XXH and they are more than 3/32 of an inch. So the only piece of pipe I can weld to a XXH pipe is another XXH pipe. Too bad that it wasn't 3/16 because then, if I wanted to, I could have welded a schedule 160 pipe to an XXH one since the...

The mainline is actually 36'' and we are pulling 10% of it's flowrate to fill one 400bbl frac tank, I guess that isn't very little of the mainline flow. We're doing this as a test to see if the pipelines control room will pick up a leak. The hard pipe from the mainline to the metering skid, and...

I think I may be on to something here but just not sure about the way I went about doing it: We have a pipeline that is transporting oil and it should be at around 300psig. We are taking oil out of the mainline and holding it in storage tanks, the majority of the pipeline flow will still...

the thing is, we need a way to verify that the metering skid will see Xm3/min flow rate when the mainline is running at 500psi BEFORE we go to site. We have to purchase and build a lot of different spools and changeover to connect the mainline to the skid to the tanks. If the 3'' pipe we...

Hi folks, I'm working on an application where I'm tying into a live pipeline and we're diverting some of the flow to storage tanks. The flow from the pipeline goes through a metering skid which has all the bells and whistles like PSVs going to closed drain drums, strainers, check valves, PD...

I'll have to confirm the wall thicknesses and look into it the possibility of welding them together. I'll probably just end up getting everything XXH so I don't have to bother with another pipe in between to weld and that everything is XXH (not needed for this temporary application but nice...

Hi, I'm working on a project where the customer doesn't want any NPT connections at all so I have to change over all of my adapters to one piece units. So before I had a 6'' 600# raised face (RF) flange tapped to 3'' NPT, in that I put a 3'' NPT nipple, and on the nipple I put a 3'' hammer...

I guess since most pocket sized ones only give an audio signal they won't be good for what we have in mind. When we go to plant sites, each plant tells us their acceptance criteria, eg. a leak of 5ft3/year is a fail. So if we have a unit that gives us a reading of 4 we let the client know but...

For testing buried pipe with Helium, they generally use 10% Helium to get more to come through the ground. 1% is too low.

The piping and vessels on customer sites we work on have already all been hydro-tested. The leak test we do is not to check for strength but if the flanges have been put together properly. But you're totally right, if a flange hasn't been put together properly and is pressurized to 1,000kPag...

Hi folks, My company does Nitrogen-Helium leak testing as part of pre-commissioning of new oil and gas facilities. Basically we pressure up the system to 95% of the lowest PSV setting with a 99% Nitrogen and 1% Helium mixture and sniff flanges and valves for leaks. The Helium detector gives us...

Hi, Wanted to pick peoples minds on Sour oils corrosion potential for Carbon Steel(CS) pipe. I know H2S can mess up CS and so can sour oil (no H2S, just >0.5% Sulphur content). But sour oil is only a threat when it is at high temperatures (200-500C) right? Am I right in saying that if the oil...

Good to know. In that case, I'll just isolate the flow meter on either end with inline valves. Thanks!!

Hi Folks, I've got a 6'' FMC positive displacement liquid flow meter as part of some piping that I have to pressure test with Nitrogen gas. Once we've held the pressure and start the blow down, I will be opening a vent downstream of the flow meter. I know that this is bad for turbine flow...

Thanks for all the input. I've decided to make a manifold out of XS pipe to keep from adding a full flow PSV to the 120psi rated manifold. Regards,