ASME PCC 1 2019 – Appendix E – Flange Alignment Guidelines :

Correct alignment of the joint members is an essential element of flange joint assembly . It results in maximum seating surface contact, maximum opportunity for universal gasket loading, and improves the  effectiveness of all bolt tightening methods.

For further information please contact the Academy for further guidance on how to address Stiff or Troublesome Piping Systems to ensure maximum gasket seating stress is maintained.