LIT194-Handbook of TII.pdf - Diamond Head Sprinkler Supply

PVC Schedule 40 and Schedule 80 Pipe & Injection MoldedFittings Suggested Maximum Internal Pressure RatingsPressure Rating (psi) at 73.4º F (23º C)Suggested PVC Pipe & Injection Molded Fittings Internal Pressure RatingsSchedule 40 Schedule 80Nominal Pipe Solvent Threaded Pipe Solvent ThreadedSize Cemented Joint Joint Cemented Joint Joint¹₂" 596 358 179 848 509 254³₄" 482 289 144 688 413 2061" 450 270 135 630 378 1891¹₄" 368 221 110 520 312 1561¹₂" 330 198 99 471 282 1412" 277 166 83 404 243 1212¹₂" 304 182 91 425 255 1273" 263 158 79 375 225 1123¹₂" 240 144 72 345 207 1034" 222 133 66 324 194 976" 177 106 53 279 167 838" 155 93 46 246 148 —10" 141 150 — 234 200 —12" 132 150 — 228 200 —This table is for use as a general guide only. Actual Internal Pressure Ratings may vary widely with field conditions.Elevated operating temperatures will necessitate a devaluation of the above ratings.Note: Historically, manufactures have assumed that fittings have the same internal pressurerating as pipe. A recent engineering study* by Keller-Bleisner Engineering of Logan,Utah, indicates that while the fittings do meet the minimum burst requirements ofpipe, actual operating conditions may require a devaluation of the internal pressurerating for fittings. The devaluation is due to the applied stress loads to the fittingcaused by the operating parameters of the system. The maximum internal pressureratings are admittedly based on limited data but it is most resent study pertaining tofitting internal pressure ratings.*The above study was funded by Dura, Eslon, LCP, Lasco, Nibco, R&G Sloane, and Spears.®Handbook of Technical Irrigation Information71