Why is there no information in HG/T20592-2009 regarding the maximum allowable stress for flanges made of duplex steel?
Thread Content
Why is there no information in HG/T20592-2009 regarding the maximum allowable stress for flanges made of duplex steel?
If there are no standards for the selected material, I remember that 20592 has a solution for this situation. A formula. I must have seen it before; I searched for ages but couldn’t find it, haha;P Let me try to look again
Hello, have you found it? Please send it over, including the source of the original statement. Thank you in advance!
The allowable stress of materials can be found in GB150
Mm-hmm. I’ll look for it in a moment.
Found it. In the compilation notes at the back – no wonder it took so long to find! Haha! Electronic version, 485 pages, Article 8. If you want to use materials other than the standard ones, refer to this here ； I encountered this once before; the flange material was 904L, and it was this formula that was used to determine the pressure rating. The standard clearly states the approach to handle this situation on page 28 of the electronic version, under 7.0.8; however, I cannot understand the method described there.
Thank you for the reply from Floor 6; I found both locations. Version 7.0.8 is on page 23 of the electronic version, not page 28. :victory: