cold embrittlement protection
cold embrittlement protection
(OP)
hi all,
new in the business, and i m asked to design a cold embrittlement protection for carbon steel piping of a custumer downstream a LIN vaporisation facility .the custumer does not allow a GAN supply cut for his process (inerting and blanketting).Any suggestions ? All will be welcome
new in the business, and i m asked to design a cold embrittlement protection for carbon steel piping of a custumer downstream a LIN vaporisation facility .the custumer does not allow a GAN supply cut for his process (inerting and blanketting).Any suggestions ? All will be welcome





RE: cold embrittlement protection
1. The most obvious is to put a thermocouple or other measuring device in the line and tie it into a valve that closes when a low temperature has been reached. This works fine if you have power close by and a control panel to operate it. But it's a bit overkill.
2. The all mechanical method uses a valve that is held open by gas pressure. The gas pressure is connected to a bulb through a short hose that's immersed in the flow stream. When the temperature drops, the gas in the bulb condenses and the valve loses the pressure and closes. Kaye & MacDonald makes the valve and the entire assembly can be purchased from ACME Cryogenics.
ht
I'm sure there are other suppliers of such valves and other manufacturers that will sell you a manifold with one installed but I don't know who else does this.