SC Pressure And Process Piping Practice Questions - South Carolina Pressure And Process Piping Contractor Examination Exam

It is limited to exactly 150 psig at every temperature The class number is not the working pressure; Group 1.1 (A105) Class 150 is rated 285 psig at 100°F and the rating falls as temperature rises Class 150 and Class 300 share the same bolt pattern and may be mixed Class 150 flanges may be used up to 2,500 psig if the gasket is spiral-wound