Bourdon Tubes Categorization in NACE MR0175/ISO 15156

This page features a question regarding the categorization of Bourdon tubes in the latest version of NACE MR0175. The user seeks clarification on whether Bourdon tubes fall under “”Instrument tubing and associated compression fittings,…”” or “”Diaphragms, pressure measuring devices and pressure seals.””

Answer:

Bourdon tubes are not explicitly addressed in NACE MR0175/ISO 15156 and, therefore, cannot be classified under these categories. Nonetheless, the user should select a material based on its suitability for their service conditions.

This question pertains to NACE MR0175/ISO 15156-3 A.2.2, Table A.4, and the reference cited is ISO 15156 Maintenance Panel Inquiry #2007-01.