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PE Saddle Fusion Procedure

PE Saddle Fusion Procedure

(OP)
Hi

This is regarding an apparent contradiction I encountered while studying the saddle fusion procedure for JM Eagle PE tapping tees (pg. 35):

http://jmeagle.com/pdfs/installation/MDPE_YELLOW_G...

As per the procedure described for installing tapping tees on 1-1/4" main lines, the tapping tees need to be heated for 40 seconds and pipe for only 25 seconds (i.e. an additional 15 seconds for tapping tees). Doesn't this mean that the melt flow rates of pipe and fitting are very different? But at the same time, according to the document above, "JM Eagleā„¢ also has tested and endorses TR-41".

How is this possible?

If the melt flow rates of pipe and fitting are so different, how could the same pipe and fitting be fused using the TR-41 procedure, in which there is no indication of any difference in heating times? Moreover, as per TR-41, the maximum total heating time for 1-1/4" sized pipe/tapping tees is only 15 seconds.

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