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.
Temperature Influences. The physical properties of Vinidex PE pipes are related to a standard reference temperature of 20Â°C. Where physical property values are quoted to ISO and DIN Standard test methods, these are for the 20Â°C condition, unless otherwise quoted. PE pipes may be used at operating temperatures between -40Â°C and +80Â°C. For temperatures less than 20Â°C it is convention to use the 20Â°C hydrostatic design stress. Below freezing, additional care may be required as the impact strength of PE is reduced.