Yeah, I believe the code just says the exhaust “must be routed to a safe and appropriate location” and then there’s all sorts of interpretations of what that is, i.e. in a refinery, your process hydrocarbons get vented to a flare header to be burned off, most utility services (steam) get routed up and vented out the roof or just to a vent header. There’s some hardcore fluid calcs involved when you’ve got a volatile 2-phase hydrocarbon system being vented from overpressure conditions (hundreds and sometimes thousands of psi) down to flare pressure and you gotta make sure you pressure drop on the inlet and outlet piping of your valve isn’t going to cause valve chatter or a whole host of other issues.
Speaking of check valves, literally one of our standard potential overpressure scenarios we had to account for in every system was backward check valves. So the process safety guys are well aware how easy it is to screw up
Oh geez, I’ve been all over the place as far as industries go. My first job was in O&G at a remote office in Chicago, then I was kinda stuck because I wasn’t willing to pack up and move to oil country, so I got into manufacturing. Then in the last 2 years or so, my good buddy came down from the Michigan cannabis biz to try and start up the first industrial CBD processor in Indiana and asked if I wanted in. Of course I said yes.
Leak check the system the first time it’s pressurized AND every time a new component is added.
There are several “leak detector fluids” available at Lowes and such, or you can make your own - filling a spray bottle with 50/50 blend of dish soap & water.
Charge the system and spray all connections liberally. If you see bubbles, you’ve got a leak - - redo that connection. Check the valve → regulator connection when the nitrogen tank is replaced.
PSI was a joke early on. I read there brochure last year and there was flaws in their inspection.
Their team looks revamped. I haven’t been in the manufacturing equipment sector for a while so Idk the new standards by them. I only speak from past experiences. I was in the oil and gas industry a decade ago and my family is in it also. My cousin is a safety engineer for Exxon.
They have had accidents from there “inspected” equipment. Have you heard of that incident with the malfunction PRV valve that caught an operator on fire. PSI didn’t recommend an anti-static device coming from the solvent recovery tank to the column.
Personally I wouldn’t depend on there criteria. They don’t have a process engineer or Instrumentation engineer.
psi told everyone a few years ago in a meeting that torque wrenches were not needed and go until the nuts/ bolts squeak. Would not trust those sight glases100%.
We aren’t talking about site glasses. But, what I’m referring to is, that my (old) system is certified by 3pcertz and has prv horizontal. Also, an ets has horizontal prv and is certified by psi.
That’s the statement I’m making.
I also found that if you only tighten down certain gaskets to this torque you speak of, they leak, every time, from the steel and gasket shrinking.
Hi,
I was in agreeance with your statement about psi quackery, then went on to mention their recommended t/c tightening sop to go until the bolts squeaked.
then I went on to say this:
they look dangerous.
That is why there is a torque recommendation for each type of gasket material.
going to the squeak is asking for trouble, not sure what they were thinking when they said that.
Waiting for the squeak is going to cause fucked up gaskets. But, I have found that if I torque them to what they say, at room temp, they’ll leak when in operation. At -70c~ they definitely change.
And the ets sites or the bizzybee. I know you hate the bizzybee ones. But, I will still use em.
