The British standard for fire tube heaters BS2750 (I think that is the number) and our Australian code AS1228 both contain appendixes for tube sheet temperature calculations. In the reference section for the appendix it calls up literature that conations 1st principal calculation methods for...
See if you can obtain a copy of Australian standards AS1797 design of fire tube boilers. The appendix section for tube sheet temperature calculations gives excellent references on literature refereeing to fire tube boiler design. Alternativly i could scan the page and emial it to you.
A.E Blatch has written a paper published by ASME called bolted flanged connections for non circular pressure vessels from “advances in bolted technology 1989” this may be of some help.
You could also use
· BS 5500 Appendix G
· The theory and design of pressure vessels by John F Harvey section 6.16 pp 474 in edition 2 or
· The pressure vessel design manual by Dennis R Moss section 5 pp 159
· Mechanical design of heat exchangers and pressure vessel components K.P Singh & A.I...