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.
A minimum service temperature for PVC pipes is not specified. However, it should be noted that the resistance of PVC pipes to impact decreases with temperature. If PVC pipes and fittings are being installed at low temperatures (around 0Â°C), additional care should be taken to avoid impact. Where impact is likely to occur in above ground pipe installations, protection should be provided. For more information see Vinidex Technical Note VX-TN-4P.