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.
Refer to Attachment 3. This is just below the polyethylene pipe maximum pipe service temperature of 60 ÂºC, so the design would be allowed. However, an FEA of this design shows that the actual pipe wall temperature under the heat tracer is only 29 ÂºC, which is well below the maximum pipe service tem-perature rating.