Have any good topic guide to use a tempil verification
Identify color and melting temperature.
It should touch direct to base metal within 25mm from bevel edge or weld toe.
Required two of them one for identifying min interpass temperature and one for measuring max interpass temperature(When impact test required).
Minimum interpass temperature shall be measured at a distance of 75 mm or more and Max measured from 25 mm from bevel edge .