PROGRESSING TOGETHER SCHEDULE VS. CLASS RATED PVC PIPE
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SCHEDULE VS. CLASS RATED PVC PIPE Labeling rated PVC pipe SChedule Rated PiPe The more traditional method for labeling pipe pressure is based on the standard dimensions of steel pipe, this is called “Schedule” PVC. The most common types of Schedule (abbreviated SCH) PVC are SCH 40 and SCH 80. When you increase the diameter of SCH pipe the strength and pressure rating begin to decrease, due to the wall thickness remaining the same. Note that the industry standard rule is that your normal operating pressure should not exceed 1/2 of the rated pipe pressure. In other words, you shouldn’t use 2” SCH 40 pipe for pressures higher than 140 PSI. This is because of pressure surges, or “water hammer,” created by closing valves which can easily double the water pressure in the pipe. This rule applies to all PVC pipe. PSi RatingS foR SCh 40 " 480 PSi 1" 450 PSi 1-½" 330 PSi 2" 280 PSi 3" 260 PSi 4" 220 PSi 6" 180 PSi 8" 160 PSi PSi RatingS foR SCh 80 " 680 PSi 1" 640 PSi 1-½" 480 PSi 2" 400 PSi 3" 380 PSi 4" 320 PSi 6" 280 PSi 8" 250 PSi ClaSS Rated PiPe Another way of labeling the pressure rating of PVC pipe is with Class (abbreviated “CL”). The CL system of labeling rates the internal pressure that a pipe can take, so pipe labeled CL200 can take 200 PSi no matter the diameter of the pipe. Some of the more common types of CL pipes are CL 125, CL 160, CL 200 and CL 315. PROGRESSING TOGETHER
Transcript of PROGRESSING TOGETHER SCHEDULE VS. CLASS RATED PVC PIPE
SCHEDULE VS. CLASS RATED PVC PIPELabeling rated PVC pipe
SChedule Rated PiPeThe more traditional method for labeling pipe pressure is based on the standard dimensions of steel pipe, this is called “Schedule” PVC. The most common types of Schedule (abbreviated SCH) PVC are SCH 40 and SCH 80. When you increase the diameter of SCH pipe the strength and pressure rating begin to decrease, due to the wall thickness remaining the same.
Note that the industry standard rule is that your normal operating pressure should not exceed 1/2 of the rated pipe pressure. In other words, you shouldn’t use 2” SCH 40 pipe for pressures higher than 140 PSI. This is because of pressure surges, or “water hammer,” created by closing valves which can easily double the water pressure in the pipe. This rule applies to all PVC pipe.
PSi RatingS foR SCh 403/4" 480 PSi1" 450 PSi1-½" 330 PSi2" 280 PSi3" 260 PSi4" 220 PSi6" 180 PSi8" 160 PSi
PSi RatingS foR SCh 803/4" 680 PSi1" 640 PSi1-½" 480 PSi2" 400 PSi3" 380 PSi4" 320 PSi6" 280 PSi8" 250 PSi
ClaSS Rated PiPeAnother way of labeling the pressure rating of PVC pipe is with Class (abbreviated “CL”). The CL system of labeling rates the internal pressure that a pipe can take, so pipe labeled CL200 can take 200 PSi no matter the diameter of the pipe. Some of the more common types of CL pipes are CL 125, CL 160, CL 200 and CL 315.
PROGRESSING TOGETHER
