CHAPTER TWO: Boiler Operation Maintenance & Safety Study Guide
Mar 15, 2017 · Detailed logs of boiler operation and maintenance can help ensure boiler safety. Boilers should always be brought on line slowly and cold water should never be injected into a hot system. Sudden changes in temperature can warp or rupture the boiler. Because many boilers are fire-operated by natural gas, diesel or fuel oil, special precautions need to be taken.
Safety and safety-relief valves on low-pressure boilers should be tested at least quarterly, this is in accordance with the National Board Inspection Code. Blow-down valves The concentration of solids in the boiler should be measured and the boiler blown-down at such intervals as necessary to maintain established limits.
Boiler Safety - Occupational Safety and Health Administration
With the boiler pressure at a minimum of 75% of the safety valve set pressure, the safety valve try lever is lifted to wide open position. Steam is discharged for 5 sec to 10 sec. The try lever is released, and the disk should snap to the closed position against the valve seat. Malfunctioning safety valves must be replaced as soon as possible.
Safety Guideline for Boiler Operations in Machinery Spaces
recommended procedures for safe firing of black liquor. The heart of the procedure is continuous monitoring of the solids content of black liquor coming to the furnace header and automatic diversion of the liquor if the solids content falls below 58% solids. It also includes start up and trip logic that ensure that proper conditions for black liquor
(i) Safety. The boiler should be safe under operating conditions. (ii) Accessibility. The various parts of the boiler should be accessible for repair and maintenance. (iii) Capacity. The boiler should be capable of supplying steam according to the requirements. (iv) Efficiency.
Oct 04, 2017 · Every steam and water-heating boiler must have at least one safety valve, which plays a critical role in relieving the pressure generated within the system. It is important to keep in mind that a safety valve, just like other safety devices can malfunction because of different conditions, such as corrosion or restricted flow.