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@goutam_freelance Thanks, I'll look into to see if I can use it on my spreadsheet. @LittleInch I'll be honest, you wouldn't be the first one to tell me this. It's been on my to-do list to charm some people so we can make a pseudo-prototype arrangement to get out of theory territory and get some...

Sorry, I should've given more details. I usually work with lubricating oil with temperatures ranging from 40 - 60 °C, so their viscosities should be around 21 - 46 cSt. For a commercial efficient sizing, we usually try to get a flow speed between 0.7 and 1.8 m/s. The slope will range from 40...

Hello again. I'm working on a spreadsheet to aid my coworkers in sizing a Lube Oil System as per API 614 6th editions, and one of the requirements is that all gravity return oil lines must be at most half full. So, what I've been trying to do is to determine what is the flow that could run...

Thanks @rb1957 and @Stick. , upon better reading Shigley's does already answer my question just as you said, I should just consider the threaded bolt as a "single" spring for bolt stiffness calculation.

Hi, I'm designing a bolted joint for the first time and Shigley's fasteners chapter was recommended to me for a good starting point. I'm not writing the entire demonstration, but in the end, we have the following formula to calculate the bolt stiffness: Which Ld and Ad are the bolt unthreaded...

Thanks for all the replies and sorry for the delay. The slope is indeed constant in the main header and on the branches. We try to keep at least the minimum as per API (2.3° iirc) + the ship pitch/roll values. And about the measuring, mostly I'm trying to look at the worst case scenario to...

Hello. I work with drive-pump trains that usually have API 614 lube oil systems (LOS) installed. Those LOS always have an oil return pipeline that works only with gravity, and this return line have quite a few temperature gauges + thermowells to check how hot the oil is leaving each equipment...

Thanks TugboatEng, this solution from Flextallic seems great. From what I understand, graphite in seawater would create a extremely favorable environment from corrosion. So in a situation in where the flange material is correctly selected, a PTFE filler gasket would be acceptable, no?

I'm currently working on a seawater piping service and I need to selected the proper gaskets to avoid corrosion due to seawater in contact with super duplex steel. For seawater, I was told that the "rule of thumb" was to always use PTFE as a filler for spiral wound gaskets, since graphite...

Thanks Mech5656 and S. Barman, your contributions were of great help!

Thansk for your answer! The requirement from 6.4.2.1 actually slipped from us (will make sure to include that), but my original post was more about the actual definition of "machined and studded connections" for pump casings, since it's not our bread and butter configuration.

Hello! Our engineering team is developing a "API 610 guide for beginners", in which we're trying to make it even easier for someone new to this area to understand the standard's requirements. One point that got us confused were items 6.4.2.1 and 6.4.3.6 (from API 610 12th ed), which says about...

Thank you very much!

Hello, I'm designing a lube oil reservoir as per API 614 guidelines, but one characteristic is puzzling me. In API 614, 1.3.6.2.6 says that "[...] free surface of oil in the reservoir shall be a minimum of 60 cm² for each liter per minute of normal flow". I tried checking another literature...

@thebard3 HART is mandatory per customer standards. @Jason.sprigg I didn't think of that, I'll see if it's feasable.

Hello, I'm looking for a accelerometer model which has 4-20 mA + HART output, suitable for Zone 1 and 2, but with INMETRO certification (legal reasons). I tried looking in Bently Nevada's, Emerson/PCB's catalogues and some general Google search, but it seems I'm out of luck, hardly any of them...

For other points, such as low pressure, in which the flow would be high, is it still advised to use trip using the flow? Or in that case pressure tripping is acceptable? Anyway, thank you very much, I got the answer for my main problem, the rest is just me trying to get better at my job haha

So flow would solve it, I see. And sorry, I cannot post the pump's curve due to our company's policy, but this thread could be about a general doubt, since we do this process quite a lot, it's always good to know better ways to set our sensors. So to close this matter, to measure pressure at...

Hi, I'm working in the instrumentation department, and we need to set the alarm and trip point of a centrifugal pump. I'm having trouble with the high pressure trip value. According to our pump's curve, the highest discharge pressure would be at shut-off head (348 m) with +5% of tolerance...