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1004.3 Working Clearance
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Clearances shall be maintained around boilers, generators, heaters, tanks and related equipment and appliances so as to permit inspection, servicing, repair, replacement and visibility of all gauges. Where boilers are installed or replaced, clearance shall be provided to allow access for inspection, maintenance and repair. Passageways around all sides of boilers shall have an unobstructed width of not less than 18 inches (457 mm), unless otherwise approved.
|BOILER TYPE||MINIMUM |
FROM TOP OF
except where a greater clearance is required inthis table.
All boilers without manholes on top of the
where a greater clearance is required in thistable.
High-pressure steam boilers with steam generating
capacity not exceeding 5,000 pounds perhour.
High-pressure steam boilers with steam generatingcapacity exceeding 5,000 pounds per hour.
High-pressure steam boilers having heating surfacenot exceeding 1,000 square feet.
High-pressure steam boilers having heating surfacein excess of 1,000 square feet.
High-pressure steam boilers with input notexceeding 5,000,000 Btu/h.
High-pressure steam boilers with input inexcess of 5,000,000 Btu/h.
Steam-heating boilers and hot water-heatingboilers with input exceeding 5,000,000 Btu/h.
Steam-heating boilers exceeding 5,000 poundsof steam per hour.
Steam-heating boilers and hot water-heating
boilers having heating surface exceeding 1,000square feet.
For SI: 1 foot = 304.8 mm, 1 square foot = 0.0929 m2, 1 pound per hour = 0.4536 kg/h, 1 Btu/hr = 0.293 W.
Related Code Sections
1004.3 Boilers, Water Heaters and Pressure Vessels, Working Clearance
Clearances shall be maintained around boilers, generators, heaters, tanks and related equipment and appliances so as to permit inspection ...
Mechanical Code 2018 of Maryland > 10 Boilers, Water Heaters and Pressure Vessels > 1004 Boilers > 1004.3 Working Clearance