The product is formed with high quality welded tube and advanced galvanization technology and equipment,The galvanization layer is equally galvanized and smooth finished.Both inside and outside surface are smooth,without black spot or bleb.It features high corrosion resistance and is widely used as wire tubing under the poor condition.

Our executive spec is as below :

ASTM A53/A53M-1996 　BS1387-1985 　DIN2244 　GB3091-93