... , 60% Lead but if need change pls let us know. How many percentage of lead & Tin could be change arrcoding your request ... % Antimonial Lead Alloy. The main application for such Lead Pipes are for Water, Soil Waste, Ventilating, Gas Purpose,Telephones, Telegraph, ... Under ground works, Acids & Chemicals. In present time, Lead Pipes are mainly used for carriage of corrosive chemicals in chemical plants ...