API 641 Testing of Quarter-turn Valve for Fugitive Emissions

[yonatan roman]

I have a question about API 641 Testing of Quarter-turn Valve for Fugitive Emissions

"stem diameter is between one-half to two times the test valve"

[/b]what would be the correct interpretation of the text?

I undestand that the stem diameter of the test valve and multiplied by 0.5 to 2.0 and all the valves that have the stem diameter between this two dimensions are qualifyed

 

[eteoh]

That is correct!

In my opinion, this make more sense than API 624.