When are you required to use a fire safe valve?

A Butterfly Valve Body should be CF-8M and it is marked as same. But the MTC read Body as SS 316 and no mention of CF8M

My current employer would like to discontinue the practice of having rupture disks ASME certified for pressure vessels. He would rather just use the graphite ones "off the shelf".

Trim selection is generally based on the following key factors; 1.Application/service 2. Temperature 3.Cost effecti

I know the dimensions for flat head, 'double d'. I use standard ISO EN 5211. But what can i use for machining 'single' flat head? Is just the same as ISO EN 5211 and only machine one side at the stem

Can anyone send me an example of these drawings and explain if P&ID's are a as built drawing??

I am trying to understand what the limits are of pre-compressor methanol injection on turbocharged cars.

I'm having a problem with a hydraulic teststand and have a suspicion that it might be because of a faulty servo valve. As we have plenty of oilsupply and a good cooling system the leakage isnt really