NAC455C.158. Preparation for inspection.

     1. The owner of a boiler or pressure vessel or his or her agent shall prepare each boiler or pressure vessel for internal inspection and shall apply a hydrostatic or pressure test, whenever necessary, on the date specified by the inspector or special inspector. The date must not be less than 7 days after the date of notification by the authorized inspection entity that an inspection will be made.

     2. The owner of a boiler or pressure vessel or his or her agent shall prepare the boiler or pressure vessel for internal inspection as follows:

     (a) Water must be drawn off and the boiler washed thoroughly.

     (b) Plates for a manhole or handhole, washout plugs and inspection plugs in the connections of the water column must be removed. The furnace and combustion chambers must be thoroughly cooled and cleaned.

     (c) All grates of internally fired boilers must be removed.

     (d) Brickwork or insulation must be removed as required by the inspector or special inspector to determine the condition of the boiler or pressure vessel, headers, furnace, supports or other parts.

     (e) The pressure gauge must be removed for testing.

     (f) Any leakage of steam or hot water into the boiler or pressure vessel must be prevented by disconnecting the pipe or valve at the most convenient point or by any method approved by the inspector or special inspector.

     (g) Before opening the cover for a manhole or handhole and entering any parts of the boiler or pressure vessel which connect to a common header with other boilers, the nonreturn valve, steam stop valves, blowoff valves and feed valves must be closed, tagged and padlocked, and the drain valves or cocks located between valves must be opened. Blowoff lines must be disconnected between pressure parts and valves where practicable. All drains and vent lines must be opened.

     3. Pressure vessels must be prepared for inspection to the extent deemed necessary by the inspector or special inspector using the applicable procedures set forth in subsection 2.

     (Added to NAC by Div. of Industrial Relations by R101-02, eff. 12-15-2004)