Canadian Registration Numbers (CRNs) identify unique pressure equipment designs for use in Canada. Each design concept has a unique number. One Canadian Registration Number can represent millions of individual items, each with a different serial number, that all conform to the CRN design.
Type K thermocouples, which consist of a chromel leg and an alumel leg, are widely used in industry for measuring process temperatures up to 1200°C. They are however, susceptible to preferential oxidation or “green rot” as it also more commonly known.