Note#19
Allowable stresses. B31.1 allowable are lower than B31.3 because b31.3 plants generally have a plant life of about 20 to 30 years. B31.1 on the other is about 40 years, B31.1 is MORE conservative than B31.3
Allowable stresses. B31.1 allowable are lower than B31.3 because b31.3 plants generally have a plant life of about 20 to 30 years. B31.1 on the other is about 40 years, B31.1 is MORE conservative than B31.3