This was our first thought, the intention to burn the complete body and bonnet and assure the temperature on packing. But there is no mention of the intention at the standard, and all the standard is a little bit doubtful.
Thanks for the response!
Dear All!
We are studying the fire test normatives, and we find this requirement in most of them. According API 607 and ISO 10497:
Mount the test valve in the test apparatus such that the stem and bore of the valve are in the horizontal position.[...].
In both normatives the horizontal...
