installation of platforms on exising stacks
installation of platforms on exising stacks
(OP)
In our refinery we have to install new platforms and ladders to existing stacks of boilers, furnaces and heaters. This is for the monitoring of emissions from the stack.
The platforms shall be installed at a minium of eight stack diameters from stack bottom.
What sort of calculations should i perform to check the stability of existing stacks for new loads.
The platforms shall be installed at a minium of eight stack diameters from stack bottom.
What sort of calculations should i perform to check the stability of existing stacks for new loads.





RE: installation of platforms on exising stacks
RE: installation of platforms on exising stacks
Actually there is a debate going on who should do the job of analysis of stack. A structure engineer or a mechanical engineer with experience in design for stacks. The platform is going to be welded to the stack and structure engineer says he will design the platform but will not analyze the stack because its an equipment and an experienced equipment engineer should analyze the stack.
I want to subcontract this job and want to know what sort of calculations should I ask from the subcontractor. Actually the stacks are existing and should I ask for wind analysis of the stacks again for new platforms or should I ask for only the dead/live load analysis of the stack due to the new platform..
regards,
RE: installation of platforms on exising stacks
Wind load calculations in addition to static load analysis of the stack as a result of the addition of a platform. Make sure the structural engineer is licensed.
RE: installation of platforms on exising stacks
Lots of structural guys out there. Structural AND Mechanical, the pickings start getting slim.
RE: installation of platforms on exising stacks
RE: installation of platforms on exising stacks
Retrofitting is always difficult.
Regards
Stonecold
RE: installation of platforms on exising stacks
RE: installation of platforms on exising stacks
I would seriously consider a self-supporting structure, as mentioned above.
Some exploratory UT readings of your existing stack could be money well spent.
A justification for a well designed self-supporting structure would be: if the stack is replaced, the platform structure need not be....
My opinion only
RE: installation of platforms on exising stacks
If any of these stacks are refractory lined internally, you will have to be careful so as not to damage existing refractory lining due to welding and/or vibration during retrofitting.
RE: installation of platforms on exising stacks
Regards,
Lyle