Covers welding by oxy-acetylene, oxy-hydrogen and oxy-propane. Parent metals covered are copper, carbon steel, galvanized carbon steel, cast iron, malleable iron and combinations of any two of these. Includes basic requirements, operator approval, examination and test procedures supplemented by specific requirements for each parent metal.Cross References: BS 499:Part 1*BS 1453*BS 1723:Part 2*BS 1723:Part 3*BS 1723:Part 4*BS 2635*BS 6017 *