NYC High Pressure Boiler Safety Questions with Expert Solutions

NYC High Pressure Boiler Safety Questions The minimum blowdown for a spring loaded safety valve shall be of what percent of set pressure? - ANS 10% How is the main steam pressure gages tested? - ANS With an inspectors gage Who is in charge of the code for any plumbing installations? - ANS The nyc plumbing code When will anchorage or guides be inspected? - ANS Annually How many brass washout plugs does a miniature boiler have? - ANS 3 brass washout plugs, 1" in size How often is HP piping expansion joints inspected? - ANS Weekly How long should a hydronic system be pressure tested for? - ANS 2 hours at no less than 100 psig How is a gage protected from excessive pressure? - ANS Shut off cock Who is authorized to witness a test on a gas piping system? - ANS Plumbing inspector, architect, licensed PE, master plumber, agency by the DOB How should a remote disconnect be labeled? - ANS Remote control for burner When is a fusible plug not needed to be installed on a boiler? - ANS Over 200 psig When shall a power boiler with a MAWP over 400 be tested? - ANS Pressure tested annually What shall a design plan of a boiler and application contain but not limited to? - ANS Size, location, operating pressure + temperature of the pressure vessel and type + specs of PRV Who is responsible for maintaining the copies of the certified welder qualifications report? - ANS The welding agency and shall be available to the DOB Who needs to furnish a control diagram and boiler operation instructions? - ANS The installer Who will certify and calibrate all gages utilized for testing? - ANS A testing operator What shall be placed in between different joints and piping material? - ANS An approved adapter fitting What items are exempt from the reporting requirements? - ANS The seal welds of the tubes and the installation of back rings to man holes and hand holes to boilers Who will be under control for any welding done to a high pressure tank? - ANS An engineer supervising a welding inspection agency acceptable to the DOB At what pressure is it requires to have extra heavy valves installed? - ANS 100 psig The ______ files an application for a boiler alteration? - ANS Inspector How many safety valves does a boiler have with over 500 square feet of heating surface? - ANS 2 Gas fired boilers not exceeding 100 square feet of heating surface shall be provided with a? - ANS Single or double cone type of hood diverter in the stack A heater for either liquid fuels or other liquids harmful to the boiler shall not be installed? - ANS Directly in the steam or water space within the boiler Who is responsible for any spatial relationship between tanks and gas services? - ANS The installer of the last installation to correct a violation Who is responsible for the setting of operating and safety controls? - ANS The Installing Company With what safety fitting shall you protect high pressure steam and water boilers with? - ANS Dual low water cut outs Spring loaded safety valves have a total combined relieve capacity of? - ANS 100% of the max designed capacity of the boiler What is the total combined relieving capacity of power actuated relieving valves? - ANS No less the 10% of the MAWP or no higher then 20% above the MAWP What is the minimum blowdown for a spring loaded safety valve? - ANS 2% When a boiler is derated what changes? - ANS The MAWP decreases and the BTU output In hydronic piping systems where shall a shutoff valve be installed? - ANS Before and after the Pressure Reducing Valve Hydronic piping joints between steel tubing and fittings shall be? - ANS Mechanical or Welded What appears on the plate of a boiler? - ANS Serial #, name of manufacturer, serial # of manufacturer, MAWP, heating surface, year built and rated steam capacity Waste removal of a boiler shall conduct the products of combustion where? - ANS To the atmosphere When a quick closing valve creates water hammer what is installed on the line? - ANS A water hammer adapter is installed Safety valve capacity may be checked in what 3 ways? - ANS Accumulation test, evaporative capacity of feed water and amount of fuel burned Records of inspects are kept where? - ANS On the premises