What pressure can my Norell NMR tube hold?

Some reaction mixtures that are out-gassing in the NMR tube, or air-sensitive samples that require pressurizing the NMR tube with inert gas would require the NMR tube to withstand pressure without failure. This question is asked quite often and the formula bellow provides the solution. Please keep in mind that there are also other factures that can cause tube failure under pressure, such as a worn out and scratched tube. Scratches are weak points in glass, and our suggestion is to always use a new NMR tube with samples that require sealing samples under pressure.

Maximum allowable pressure P_max = NMR tube wall thickness (mm) / NMR tube O.D. (mm) X 2,000 psi

Example : 0.38mm/5mm X 2000 psi ≈ 150 psi