Guys, the radial O-rings used in the 3” and 4” series flanges seem to have a lot more stretch than a normal design ?
3” flange has 70.56 dia groove with no. 230 o-ring, 63.09 ID = 12% stretch
4” flange has 95.33 dia groove with no. 238 o-ring, 88.49 ID = 7% stretch
Have I misread (or miscalculated) this ? Normally I’d expect 2 or 3 %.
Cheers
Rich