New Test Method for Test method for evaluating pressure ratings of thermocouples.
1. Scope
The pressure rating and testing of thermocouple cabling is proposed. This includes, but is not limited to, the mineral-insulated metal-sheathed cabling, sheath wall thickness, end/tip sealing, and the different pass-through ports utilized in high pressure or vacuum systems. A re-evaluation of the helium leak rates is also proposed.
Keywords
high pressure; yield strength; max allowable working pressure; leak rate
Rationale
As process pressures and temperatures get higher, it is important that thermocouples maintain their integrity during operation. The appropriate tests must be performed on either the unit-under-test itself or representative/surrogate thermocouples to prove this integrity. Further, establishing an appropriate pressure boundary compensation for units at excessive temperature must also be established.
The title and scope are in draft form and are under development within this ASTM Committee.
Work Item Status
Date Initiated: 06-03-2024
Technical Contact: Richard Skifton
Item: 000
Ballot:
Status: