MIL-F-80207 Revision C, October 1, 1990
FURNACES, HEAT TREATING, HORIZONTAL, CAR-BOTTOM DESIGN
Includes all amendments and changes through Cancellation Notice 1, January 11, 1999
Additional Comments: CNCL NO S/S
This specification covers horizontal, car-bottom heat treating furnaces of the forced convection and direct heated design with equipment and accessories specified herein.
The furnaces shall be of the following types, styles, and classes. The type, style, and class to be furnished shall be as specified (see 6.2).
Type I - Electrically Heated Type II - Gas Fired Style A - Forced Convection Class 1 - 300°F - 1000°F Operating Temperature Class 2 - 300°F - 1250°F Operating Temperature Class 3 - 300°F - 1400°F Operating Temperature
Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Defense Industrial Plant Equipment Center, ATTN: DIPEC-SSM, 2163 Airways Boulevard, Memphis, Tennessee 38114-5051, by using the Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter.
Style B - Direct Heated Class 1 - 400°F - 1800°F Operating Temperature Class 2 - 1200°F - 2000°F Operating Temperature Class 3 - 1200°F - 2400°F Operating Temperature
The size of the furnace chamber shall be as specified (see 6.2). The furnace chamber size shall start from a minimum of three feet in width by four feet in length by three feet in height. Size changes shall increase in increments of 6 inches in width or height and 12 inches in length as required. The dimensions specified shall be the minimum inside effective working area of the heating chamber in which temperature uniformity and performance requirements specified shall be maintained. The chamber shall be capable of accommodating a charge equal in size to not less than the dimensions specified.