Soles of footwear intended for use under high temperature conditions shall be able to provide thermal insulation to the feet of the user.
The ability of sole of any footwear to provide adequate thermal insulation is determined by placing the footwear under test in a sand bath maintained at a temperature of 150°C with the sand coming up to the top edge of its outsole and measuring the temperature on top of its insole after a period of thirty minutes.
IS 15298 (Part 1) – 2002 : Safety, Protective and Occupational Footwear for
ISO8782(Part1) – 1998: Professional Use
Part 1 : Requirement and Test Methods
Clause 188.8.131.52 : Heat Insulation of Sole Complex
Clause 5.8 : Insulation against Heat
BSEN344 – 1992 : Requirements and Test Methods for Safety, Protective