I have a paper mill client that wants to replace about 750 feet of underground 3" steam piping with above-ground piping. One problem is that the structures he has available to hang pipe from are mostly 50 to 60 feet apart. I've been looking for either light pre-fab pipe bridges or some...
I have a client that has an old shell and tube condenser that is not rated for full vacuum on the shell side. Based on the operating conditions, I've determined that the vapor mass could condense in about 1 second if the shell side were closed in and the cooling water left running, requiring...
I have a client that would like to decommission an old distillation column; it's unused and he wants to get it off his annual inspection list. I'm contacting my state boiler inspector for his input, but I'm surprised that I can find nothing in BPVC Section VIII or online on how to do this...
I'm doing some analysis on a 24" steam line, it has an 8T10 safety mounted on top, side exit perpendicular to the pipe run with a 10" elbow turning vertically up and dumping into a 12" drip pan elbow. I calculated the API 520 Part II thrust force, and was just going to apply the moment created...
I noticed an unsuccessful search for this paper and had a copy, so I thought I'd post it. Even with Bodenheimer's help and 30 years experience, I find MC stock piping systems a continuing challenge to get...
Anyone have any experience with these valves? I've been partial to a couple other log-standing manufacturers' high-performance butterflies, but I have vendors starting to quote these as a lower cost option.
Thanks for any feedback.
I'm a mechanical engineer dabbling in some distillation calcs because no-one else is available. The issue is evaporating IPA off a mix with water, and I can find single, nominal values of enthalpy of evaporation for IPA, but not a complete table, like the steam tables. Am I looking for...
I'm working on some pressure relief systems for jackets that are ASME BPVC Sec VIII stamped at 55 psig, 300F, but the tanks themselves are not code pressure vessels. I'm looking at three scenarios - closed outlet valves, open pool fire and pressure regulator failure. Failed pressure regulator...
Anyone have a table or curve for the boiling point of ClO2 at various pressures? We're installing a ClO2 heater and need to size a relief valve for it and set permissives and interlocks. I'm specifically concerned about the pressure required to keep ClO2 in solution at 160F. Concentration is...
I'm designing a system to heat Chlorine Dioxide with hot washer effluent at a local paper mill. The heater is an all-titanium shell and tube heat exchanger, effluent on the tube side, ClO2 on the shell side. We'll be heating ClO2 to about 115F, which is near the safe limit before it...
Has anyone had any success with rupture pins on pulp stock pressure vessels? We've blown a few rupture discs, which shut down the process until they're replaced, and are looking for an alternative. So far the rupture pin valves I've located look like they'd plug solid after the first event...
I just read through a couple long and very interesting posts on the difference between pressure vessel Design Pressure (DP) and MAWP. They referenced that, for vessels with some height, DP applies to the top of the vessel and adjustments are made on the way down to account for static pressure...
Greetings. I have a client that needs to install two 24" and two 30" shutoff valves either side of a couple water filters. I'm looking at ABZ butterfly valves, mostly due to cost and delivery. There is a big difference in cost between their standard 397 series valve and the high-performance...
