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Hey guys, Has anyone had experience with Perma-liner or similar trenchless CIPP (cured in place pipe) repair? We have a manufacturing plant with sewer piping in bad shape due to chemical attack. I thought this might be a good option...

Hello, I'm trying to locate the current OSHA regulation for protecting workers from hot steam piping i.e. height for required insulation, distance required from walkways, etc. It's in a food manufacturing environment. I did a Google search and tried searching on OSHA's site but found only...

Hey guys We had this screw drive shaft break at the welds today. It was installed less than a year ago and I’d estimate only 1500 hours on it. Just curious what you guys think on the failure. The drawings do state the plate can be welded to the shaft to develop full strength. I wonder if...

Hey guys A little over a year ago we made post on here on looking for aftermarket pre-chamber plugs since we are going through a lot of plugs on our biogas engines - we were trying to save some money. At the time we decided to stick with the OEM plugs and have been continuing to use them to...

Hey guys, We have (3) MWM biogas engines at our plant all with same issue. Failing rubber parts in the glycol system. It’s closed loop about 40PSI 180F propylene glycol 40% mixed with deionized water Engines are about 5 years old with 24,000hours. This problem is costing a large amount of...

Conveyor support diagonal members got bent from careless lifting. Anyone know enough to recommend should we replace the members or can we use as-is? https://files.engineering.com/getfile.aspx?folder=19077638-773c-488d-9e0a-25aaed3de444&file=5B91F195-BDE0-4D90-A9ED-D667BA5168A4.jpeg

Hey guys, We have a thermal fluid pump at our plant that is leaking from the shaft seal. We have tried 2 different brand pumps now with the same result. It is a slow leak from the shaft seal. Both pump manufacturers have tried looking at the information for the system with no ideas. When...

Just wondering - for health/lifespan of motor - is controlling motor through a PID that only makes slight changes better than controlling by ramping up and down between 2 set points? Currently the motor changes between 500 and 1300 RPM via ramp up/down with VFD about 6 times per hour to...

We have (3) MWM V12 TCG 2016 engines at our plant that take prechamber spark plugs. A good deal for the OEM plugs is about $475 each. We go through about 48 plugs per year burning clean biogas. We wonder if anyone with similar application has had good luck with aftermarket prechamber plugs? I...

Hey guys, Sorry multiple questions here... Background: anaerobic digestion plant, natural gas 10PSI, digester gas 5PSI We have some equipment at our plant that came with butterfly valves for digester gas shutoff. Seem to work great. For field installed piping- all of the valves spec'd by...

I read it is not desirable to install a centrifugal secondary loop pump in the return line of hydronic system as it decreases static pressure in the loop upon pump startup. (see attachment "rule #2") The engineering firm that designed a system at our plant placed the pump in the return line -...

Odd question that I can't seem to find on Google. Does anyone happen to know what percent Glycerin vs Water is in a typical liquid filled pressure gauge? I see that freezing point is best at about 2/3 glycerin so is this typical ratio?

Hello all, We have 10PSI gas to our plant at a meter. We have .75 MMBTU appliance after 800' of 1-1/4" piping. About 2' after the meter there is a 1-1/4" Tee with a plug. We would like to add another 1-1/4" pipe 475' long to a 2 MMBTU appliance. Both appliances require 14"WC for max fire. I was...

Good morning all. We are looking at using a thermal oil for heating some equipment at our plant. The oil is kept at 350F in a main building and is currently used for one of our processes. The piping to the new equipment is run outside and is insulated. Can someone point me in the right...

Hey all, I have very large full set of drawings of our plant that are just scanned from 1983. I have been tasked with converting the old PDF to AutoCAD. We just got CAD software here - I used Solidworks for a year at my last job so I'm a beginner but am not afraid to put in the work. I do have...

Our application is thermal fluid (Paratherm HE) at 400°F and 120PSI. We are looking at 2" ball valves with either PEEK or carbon filled PTFE seats. Is one a clear winner for any reason? Both seem good to about 500°

We use polymer at our plant for dewatering sludge in belt filter presses and centrifuge. For our presses we currently take neat polymer in liquid form and mixing with non potable water in an old Dynablend L6-P mixer which then gets pumped into fiberglass storage tanks. From there the polymer...

We are looking at control valve with Cv of 46.4. I must assume they give this value for fully open condition. 23.441 (DN50) 2” Bellows Sealed Control Valve PN25 Pressure Rating With PREMIO PLUS 5.0kN Electric Actuator @ 120V, 50/60Hz With integrated 4-20mA Positioner...

I am looking for someone who would be interested in being a mentor for process engineering/ pipe design. I have been working for about 10 years since college. I find myself wanting to spec pumps, valves, and pipe size but just am not quite there I work at a company that helps design, build, and...

I am pretty much starting from scratch here so keep that in mind I had some AutoCAD training back in college but don't remember much. I used Solidworks at a past job for about 2 years. I download the AutoCAD programs to learn at home through their student program So far I download AutoCAD...