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In an application, we are planning to flush 891 bbls (37,414 gallons) of LPG through a 10" pipeline using water. Our initial investigation indicates that we will need roughly 500 psig discharge pressure to achieve the desired 150-180 psig downstream pressure. To inject water, we hope to utilize...

Thx for the feedback... Unfortunately, lowering may not be feasible. The pipe is at 3 to 4' of cover, and the stresses fail until we get near 10' depth. It's an 18" OD pipe, so we'd probably have to dig back further than we've got. The link posted above is re-affirmation of the AASHTO...

The application involves installing a concrete slab over an existing pipeline to protect it from loads due to a new road (highway) crossing. It currently fails the combined stress limits as calc'ed per API 1102 If anyone is familiar with the API 1102 calculations for pipeline stresses, I am...

Ditto Thank you very much!!

I am trying to calculated the Darcy friction factor and got stumped. The specification that I am following uses the equation below to solve for the transmission factor: F(oil) = 3.6 Log (Re/8) Where is this equation coming from? Then it uses the equation: F = 2 / f(d)^1/2 to solve for the...

Thanks to all for your feedback! I need to run through the calcs that unclesyd led me to, and I have a feeling that is exactly what I am looking for. I will keep you posted on how it pans out Regards, BCG1

Thank you for your feedback, I think that your concern is the risk we are trying to minimize. Most cases if it bulges out, you need to cut back on the pipe and weld in a new pup piece, which kills you in cost. My concern is that we may not be able to spread a few of the flanges to get that 1"...

For hydrotesting pipe, I am using blanks (or skillets, pancakes, paddels, etc)to seal off at the flanges. Our company has standard tables in place for determining the wall thickness of the blank; however the numbers aren't jiving with the equation in ASME B31-3. Some supplementary ASME material...

The application is to insert a flange skillet temporarily on two ends to hydrostatic test a 24" line. I am using the equation found in ASME 304.5.3 for determing the thickness "t" of Blanks. Namely, equation 15, where t= d(3P/16SE)^.5 + c. I am unable to verify the customers thickness...