As I know, SIF is computed based on Markle fatigue test.

I'm very appreciated if someone can tell me the standard of the test, or book (name, or pdf files) showing how the test is implemented.

Thanks very much.

SIFs are determined in accordance with ASME B31J - STANDARD TEST METHOD FOR DETERMINING STRESS INTENSIFICATION FACTORS (i-FACTORS) FOR METALLIC PIPING COMPONENTS.

If you're interested in acquiring a republication of Markle's papers, obtain this book:

Piping Engineering - Pipe Fitters Manual
Copyright 1986, Tube Turns, Inc.

Sypris Technologies, Inc. (Tube Turns Division)
Louisville, Kentucky
(ph) 502-774-6011
(fx) 502-74-6300
www.sypris.com

Thank Dave and Richard for your valuable replies!!!

Thanks for sharing about this book.I will surly think about it.
Piping Engineering - Pipe Fitters Manual
Copyright 1986, Tube Turns, Inc.