This standard specifies the type, structure, interchangeable parts, connection parts, basic parameters, technical requirements, test methods, acceptance rules, marking and packaging of jet-suction cutting torches. This standard applies to manual jet-suction cutting torches with oxygen-acetylene preheated flames.
JB/T 6970-1993 history
2017JB/T 7947-2017 Gas welding equipment torches for welding, cutting and related processes