GOST R IEC 62086-1-2003 Electrical apparatus for explosive gas atmospheres. Electrical resistance trace heating. Part 1. General and testing requirements
2005GOST R IEC 62086-1-2005 Electrical apparatus for explosive gas atmospheres. Electrical resistance trace heaters. Part 1. General technical requirements and test methods
2003GOST R IEC 62086-1-2003 Electrical apparatus for explosive gas atmospheres. Electrical resistance trace heating. Part 1. General and testing requirements