Oklahoma Administrative Code
Title 380 - Department of Labor
Chapter 25 - Boiler and Pressure Vessel Rules
Subchapter 7 - General Requirements
Section 380:25-7-2 - Preparation for inspection

(A) Water shall be drawn off and the boiler washed thoroughly;

(B) Manhole and handhole plates, washout plugs and inspection plugs in water column connections shall be removed as required by the Inspector. The furnace and combustion chambers shall be cooled and thoroughly cleaned;

(C) All grates of internally fired boilers shall be removed;

(D) Insulation or brickwork shall be removed as required by the Inspector in order to determine the condition of the boiler, headers, furnace, supports or other parts;

(E) The pressure gage shall be removed for testing, as required by the Inspector;

(F) Any leakage of steam or hot water into the boiler shall be prevented by disconnecting the pipe or valve at the most convenient point or any appropriate means approved by the Inspector;

(G) Before opening the manhole or handhole covers and entering any parts of the steam generating unit connected to a common header with other boilers, the nonreturn and steam stop valves must be closed, tagged, and preferably padlocked, and drain valves or cocks between the two valves opened. The feed valves must also be closed, tagged, and preferably padlocked, and drain valves or cocks located between the two valves opened. After draining the boiler, the blowoff valve shall be closed, tagged and preferably padlocked. Blowoff lines, where practicable, shall be disconnected between pressure parts and valves. All drains and vent lines shall be opened.