The gasket allows designers to strictly adhere to ASME B and PV and ASME
B31.3 codes requiring that bolt stresses do not exceed 25,000 psi. Where
ASME flange design calculations indicate that flanges will be over stressed if
a standard Class 150 spiral wound gasket is used, the LS gasket is designed to
compress at significantly lower bolt load than standard Class 150 spiral wound
gaskets, thereby maintaining flange stresses within allowable limits.