RSA 157-A:8 Inspection of Boilers and Pressure Vessels.

I. An inspector shall have free access during reasonable hours to any premises in the state where a boiler or pressure vessel is being constructed, or is being installed, or is being operated, for the purpose of ascertaining whether such boiler is being constructed or is being installed or operated in accordance with the provisions of this chapter.
II. Each boiler and pressure vessel used or proposed to be used within this state, except boilers or pressure vessels exempt under RSA 157-A:6, shall be thoroughly inspected as to their construction, installation, and condition as follows:
(a) Power boilers and high pressure-high temperature boilers shall receive a certificate inspection annually and shall also be externally inspected annually while under pressure, if possible