Measuring of interpass temperature

Hi guys,
I have a quick question.
Where do we measure the interpass temperature exactly?

for mid steel or casing or tool joint?
Tool joint and hardbanding of drilling pipes are very important to check preheat and control interpass temperature.
Yes for sure, soak heat need to monitoring and checking.

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interpass temperature is the temperature of the base metal during welding operations or once welding has begun.

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Inter-pass temperature is measured on the previously deposited bead before welding another bead on itself.

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