Kindly accept my hearfelt thanks for your response.It will be extremely kind of you if you can e-mail me that paper.

My e-mail address is abhattac@bechtel.com

It will be kind of you if you clear some of these doubts:

1)AD Merkblatter ( is it the German counterpart of ASME SEC VIII ?) does it attack the leakage problem or confine it only to allowable stress as sec VIII Div 1 appendix 2 does? Or does it have anything like Flange rigidity factor like Appendix S of the same code.

2) I read a write-up on DIN 2505 where I found that the limit analysis concept is used to predict leakage. Is something like that there in AD-Merkblatter?Is DIN 2505 replaced by EN 1591?

Thanks once again for your response and the technical paper.

Best regards

Anindya Bhattacharya