I am new to posting on this forum, but have been reading for a while. Very good page i must say :)Back to the question. We have some gate valves that are going to be ordered. 1 is for gas export (1500lbs/257 barg) one is for MEG injection (1500lbs/257barg) and one is for fuel gas/produced water (150lbs/14Barg). Witch valves need a high pressure gas test and why?Hope to get some good information.The general answer, valid worldwide is following:1. Valve should be stested according to local rules and regulations.2. Valves should be teasted according to common practice for the branch and application.... and the most important of all:3. Valves should be tested above tests given by 1 and 2 if the end-user find further tests feasible to be sure of quality and operational sequrity of the required life-time length.For point 1 and 2 you will probably find accurate answers, point 3 however is one the enduser has to evaluate....What testing standards are specified by the end user? That's where you'll find the specific answer to your question.

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