Gas Cylinder

Use of compressed gases is widespread: in commerce and industry as a fuel, in sports such as diving, and in medical and fire fighting equipment. Serious injury can result from the sudden release of the stored energy in a compressed gas cylinder through failure. The risk of failure can be substantially reduced by the maintenance of these cylinders in good repair and by regular inspection and testing.

Gas cylinder test stations require authorisation from the Environmental Protection Authority (EPA). A prerequisite is accreditation by International Accreditation New Zealand.

Cylinders for automotive alternative fuel use, LPG and CNG, come under similar requirements. Land Transport Safety Authority will approve cylinder test stations accredited by IANZ.

IANZ accreditation of gas cylinder test stations covers hydrostatic testing (stretch and proof), internal and external examination of cylinders, and the mass check, as appropriate for the type of testing being carried out.

Accreditation Criteria


  • NZS ISO/IEC 17025 General Requirements for the Competence of Testing and Calibration Laboratories.