can some one advce about the FE testing tools, if we want to carry a test what sort of tools & equipment required?

I thought you were talking about the Fundamentals of Engineering test and wondered why you had posted in "Valves".

As reverman says, there are a number of fugitive emissions tests that can be applied.  Most of them are some variant of a "bag test" where you seal a bag of some sort around the place you are testing and time how long it takes to fill the bag (of known volume-ball valve) to a specified pressure.  This is easy when you're trying to quantify leakage past a vent valve.

Quantifying flange/thread leakage, or packing leakage can be a challenge because it can be difficult to get a seal around complex shapes. 

API 622 provides details on how to build a test fixture to test packing.

As far as testing valves unfortunately there is no one standard. I would try and get a copy of either chevron's fugitive emission testing procedure Or Lion Oil's those two specs are the most harsh I've seen and if you pass those you many companies (not all) will accept it.

API 622 is currently in revision and one of the items on the agenda was to add a method for testing valves. However at the last API meeting this section was removed. They may release as a separate API standard but I have no idea what time frame that would be.

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