[vishal.khadke]

Dear JOP,
I visited the site recommended by you and had a wonderful tour. However there is no guideline about the usual jacket-core sizes combinations or about the minimum gap that is to be maintained between jacket & core.
My basic question is how much minimum gap is required between core and jacket from fabrication point of view. In my present case I am getting 7 mm. It is okay from hydraulic considerations but I am not sure about whether it will be easy for fabrication.

Thanks & Regards,
VISHAL KHADKE