Factors of safety

The minimum factor of safety may not be less than four for existing installations. The director authorizes an inspector to increase the factor of safety if the condition of the boiler or pressure vessel warrants it. If the owner or user does not concur with the inspector's decision, the owner or user may appeal to the director who may request a joint inspection by the chief boiler inspector and the deputy inspector or special inspector. Each inspector shall render the inspector's report to the director, and the director shall render the final decision, based upon the data contained in all the inspector's reports.