I'm not sure the changes are available outside of code committee personnel. Probably the biggest change is the optional(?) appendix on qualifying folks to assemble BFJ's. I believe the next edition is scheduled to "hit the streets" in March of next year.
Thanks jt, based on various literature I've come across there is a new(ish) draft method for design of flanged joints and tightness prediction, which as I understand is intended to form a new non-mandatory appendix. (PCC-1 is specifically for assembly to my knowledge). I've seen this referred to as ASME BFJ, I suspect it is only publicly available in the form of various PVRC/WRC bulletins.
MBlackman, the gasket makers often publish the method for design based on tightness class. They may not exactly relect whatever ASME finally publishes, but my guess is they will be generally the same.
You should be able to find something on "PVRC flange design" or similar.
I don't know if one is available yet. Your best bet would be to attend the ASME Code Committee meeting in St. Louis, November 1-6. SWG BFJ meets on Wednesday, from 8:30am-5:00pm.
Going off what SnTMan said, those rules are not officially released yet. However many gasket books discuss that, a good one specifically is "Industrial Gaskets" put out by Teadit.
