31. Precautions during light-up: For the lighting of small torch-fired furnaces, the following precautions shall be taken:(a) the torch shall have a shield and be at least 1.5 m length to protect the user from burns;
(b) the air supply shall be sufficient to create a slight draught prior to placing the torch to the burner;
(c) no person shall stand or pass in front of the doors during the lighting operations.