For the design of oil & gas valves, what is the difference in using either API 6D or ASME B16.34?

I am a new member to this site and have a question that often comes up on oil and gas production sites. When a compressor is located on one of these sites it is often in what is classed as a Class 1,

I have a connecting rod designed with a plain spherical roller bearing with both sides sealed with a shaft seal. In the con rod I have a grease fitting for applying grease once the con rod is install

Can anyone tell me how the DP across the two ports of a 3 way valve affects its control. This 3 way valve either lets glycerine flow through an exchanger or bypasses it. The dp designed in direction o

Does any know if there is any guide for valve packing selection based on service and temperature?

I was hoping someone could point me to the correct P&ID symbol/symbols to be able to show what we refer to as a "Fire Safety Valve" which is an isolating valve with a fusible link.

I am trying to explain (or even better to find a relationship describing) the gas temperature increase in the scraper-trap of a natural gas pipeline system, when it is filled with gas (from 0 bar to 5

This thread post is prompted by the 'melting pistons and lean fuel mixture' thread as it has mentions of plasma plugs and hydrogen which are things I have been thinking of lately.