Emily0929
Mechanical
- Feb 10, 2016
- 13
Hello everybody,
I am currently working on a calculation for scrubber towers. the towers have bolted on unstayed flat heads. As I have been going through the minimum thickness requirements for the flat head I ran into some questions.
ASME Section VIII Div 1 UG-34 refers to mandatory appendix 2-5 in order to obtain W (flange design bolt load). In this equation you need to look at Table 2-5.2 (Effective Gasket width) in order to determine bo as a general note in the table it states that the gasket factors listed only apply to flanged joints in which the gasket is contained within the inner edges of the bolt holes.
However, the gasket used for the flat head contains bolt holes and therefore the bolts go through the gasket, does this make this table not applicable?
I tried looking at the ASME PTB-4 for guidance but the example they give the gasket falls within the inner edges of the bolt holes. I would like to know if there is a way I should be looking at this in order to obtain the correct numbers for W. If anyone has ever dealt with gaskets where the bolts for the flat head goes through both the head and gasket, any advice would be greatly appreciated.
Thank you,
Emily
I am currently working on a calculation for scrubber towers. the towers have bolted on unstayed flat heads. As I have been going through the minimum thickness requirements for the flat head I ran into some questions.
ASME Section VIII Div 1 UG-34 refers to mandatory appendix 2-5 in order to obtain W (flange design bolt load). In this equation you need to look at Table 2-5.2 (Effective Gasket width) in order to determine bo as a general note in the table it states that the gasket factors listed only apply to flanged joints in which the gasket is contained within the inner edges of the bolt holes.
However, the gasket used for the flat head contains bolt holes and therefore the bolts go through the gasket, does this make this table not applicable?
I tried looking at the ASME PTB-4 for guidance but the example they give the gasket falls within the inner edges of the bolt holes. I would like to know if there is a way I should be looking at this in order to obtain the correct numbers for W. If anyone has ever dealt with gaskets where the bolts for the flat head goes through both the head and gasket, any advice would be greatly appreciated.
Thank you,
Emily
