Possibility #2 Not all asthmatics wheeze throughout an attack. Some don't wheeze at all. Sometimes lack of wheezing means they are no longer compensating so the lungs are hyper-inflated to the max and wheezing can't happen. Neither lung sounds nor O2 sats are good indicators for asthmatics. Peak- Flow meters are the best way to determine the status.
1 Answer. 0. The upper limit temperature for pressure service is 140 degrees Fahrenheit. ln structural pipe, gravity flow application in stable oils; the upper thermal limit is considered to be in the range of 160F for long term exposure; and up to 180 degrees Fahrenheit for short-term intermittent exposure.
ABS, PE, PVC, CPVC, PB, PP and SR - pressure and operating temperatures. Operating Temperature. - is the maximum operating temperatures for plastic pipe materials. Heat Distortion Temperature. - is the temperature where a test piece of a material placed in a heat medium with a bending load (18.6 kg/cm2) applied - reaches a specified deflection. 1  ABS: 104 - 106 oC. 2  PVC: 54 - 80 oC. 3  HDPE: 43 - 49 oC.  LDPE: 32 - 41 1  oC. PP: 57 - 64  oC.