As a part of its triennial standards review and update process, the National Fire Protection Association has opened the 2014 drafts of the NFPA 86 and 87 safety standards for public comment. Public comment on the revisions, additions and deletions, and proposed changes to the standards, are being accepted until May 3.
NFPA 86, Standard for Ovens and Furnaces, and NFPA 87, Recommended Practice for Fluid Heaters, are two essential safety documents covering the construction and use of these types of essential heat processing equipment. Specifically, NFPA 86 addresses Class A, Class B, Class C and Class D ovens, dryers and furnaces, thermal oxidizers and any other heated enclosure used for processing of materials and related equipment. The terms ovens, dryers and furnaces are used interchangeably within the standard, says NFPA, and also apply to other heated enclosures used for processing of materials. Within the scope of the standard, a Class A, Class B or Class C oven is any heated enclosure operating at approximately atmospheric pressure and used for industrial or commercial processing of materials. It also applies to Class D ovens and furnaces operating above ambient temperatures to more than 5,000°F (2,760°C) and at pressures normally below atmospheric to 10-8 torr (1.33 × 10-6 Pa).
NFPA 87 applies to apply to fluid heaters, including thermal fluid heaters and process fluid heaters, with a flowing fluid, under pressure, and indirectly heated. (NFPA 87 does not address water or steam heaters.)
Both the currently active 2011 editions of the standards and the 2014 proposed drafts are available for review online. The Quincy, Mass.-based organization has implemented an online standards review process that allows interested parties to submit comment on a standards development site.