Proof 's
Posted: Fri Jun 29, 2007 5:47 am
What is the 2A / 2A1 max psi , compared to the No1Mklll and the No4Mk1 ?
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Proof 's
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Posted: Mon Jul 02, 2007 1:43 am
I've seen 50,000 psi quoted as the maximum working pressure and 67,500 psi as proof pressure. But I don't know how accurate that is.
Posted: Mon Jul 02, 2007 3:36 am
I'm not sure what the definitive working pressure should be. But when I had a rfile proofed at the Birmingham proof house I asked the question as to what the proof pressure was. I was told as a rule of thumb that the proof pressure was about 30% over maximum working pressure. 