Can we use PTFE Gland packing in Fugitive Emission Control design (Globe Valves). I heard PTFE will fail during thermal cycle tests as prescribed in ISO 15848?

I spoke with Siemens today about their Magmeters they want us to use on our equipment. He stated flat out that they care not at all about flow runs or pipe and fittings before or after their flow mete

If a valve is supposed to be say Class 800, what does it mean? I am sure it is related to pressure and temperature but do not know the exact meaning.

I am designing the piping system for my treater desanding system. the treater is operationg at about 80 psig and and i have 2" sch. 160 line coming out of treater going into an atmospheric tank.

We have been facing serious problems in two areas of our plant. One is in liquid HCL isolating valves, we have more than 50 valves on dry HCL service at very low temperature but every now and then, we

I am looking for the tests and inspection that are commonly specified when purchasing ball, gate, globe etc valves for any service (water, steam and other). Reviewing ANSI B16.34 it seems to require o

I have two of these valves in series for isolation. A globe valve for isolation would not have been my first choice; but, that is what I am stuck with. The valves began leaking soon after installation

A similar philosphy would be prudent for any pressure vessel that a person can enter , if the vessel is interconnected to another active system which has dangerous fluids."