PREHEATING. Preheating with oxy-acetylene torches and stress relieving shall be assigned to a Journeyman. Preheating immediately prior to welding with liquified petroleum gas and the operation of a bending mandrel shall be assigned to a Helper. Setting the heat on welding machines, hooking and unhooking of welding machines to tow tractors shall be performed by the Welder's assigned Helper.
Appears in 9 contracts
Sources: Mainline Pipeline Agreement, Mainline Pipeline Agreement, Mainline Pipeline Agreement