Schedule 80 pipe is thicker than schedule 40 pipe.
Schedule 40 steel pipe dimensions pdf.
That means with an increase in service pressure schedule number will increase which is a pipe wall thickness designator.
Stainless steel pipe schedules append an s to the end of the schedule number for instance schedule 40s.
Cost of stainless steel.
Pipe schedule for stainless steel pipe.
Pipe dimensions and weights available in commercial and nuclear nominal pipe size od schedule designations wall thickness weightid inch mm inch mm asme inch mm lbs foot kg inch meter inch mm 5 125 5 563 141 3 5 10 std xs 120 160 xx 40 80 5s 10s 40s 80s 0 109 0 134 0 258 0 375 0 500 0 625 0 750 2 77 3 40 6 55 9 53 12 70 15 88 19 05 6 36 7 78 14.
However some process piping utility facilities and civil piping may require higher schedule numbers depending on the pressures used.
The two most common schedule sizes seen in buildings are schedule 40 and schedule 80.