For standard type rupture disc devices the leak tightness is typically 1 x 10-3 mbar.l/sec He or better, when applying O-ring seals between the rupture disc and its holder (if approved by the manufacturer!) then 1 x 10-6 mbar.l/sec is achievable. Higher leak rates will require welded type rupture discs where 1 x 10-8 mbar/le/sec or better will be feasable.
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Area of disc: pi*6^2 = 36*pi square cm
Pi*6 * * * * * Independent of the radius? Makes no difference if the disc is twice as wide? I think not! It is actually 2*pi*r2 where r is the radius of the disc.
The weight of a compact disc is approx 1.6 Newtons.
Disc most closely describes