BS ISO 21172-1 AMD1. Gas cylinders. Welded steel pressure drums up to 3 000 litres capacity for the transport of gases. Design and construction. Part 1. Capacities up to 1 000 litres— 7 стр.
Specification and qualification of welding procedures for metallic materials -- Welding procedure test -- Part 1: Arc and gas welding of steels and arc welding of nickel and nickel alloys— 46 стр.
