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A pad that is4 inches think covers80ish sq ft per yard, so8 inch would be40ish sq ft per yard of concrete.
40 psi for10 min.
Well this kind of flange is not available in Market but it thickess should be42mm and Wight is36.075 Kg
As per ASME B16.5 (pipe flanges and flanged fittings) for200 bar and assuming test medium is water @ ambient Temperature you should use1500 rating blind flange with minimum wall thickness of 91.9 mm
For class300 flanges – NPS1/2 to24
ASME B16.5 –1996
The thickness of the blind shall be41.1 mm minimum and it weighs around37 kgs.
You may also refer to Trouvay & Cauvin chapter on flanges for further details.
Hope that helps!
Accourding to DIN1092-1:2007 the thickness for flange8" is82mm at250bar
For Blind flg,8" class200, min thickness is41.1mm
The minimum thickness for blind flange8'' thick is15 mm.
