... 2.column:with Ø114mm, wall thickness of 2.2mm galvanized steel (pipes are in accordance with BS1387-1985 quality standards, ... cold-rolled steel punch forming, punching a diameter of 30mm (in accordance with Euro EN1176 standards), welding using argon ... personnel degreasing, phosphating, throwing sand, the surface coating of polyester powder DuPont outdoor environment, high temperature curing, the ...