ASTM A714 grade IV ERW pipe/tube covers welded, hot-dipped galvanized nominal (average) wall pipe for coiling, bending, flanging and other special purposes.

ASTM A714 Grade III ERW tube is a kind of high-strength and low-alloy welded steel tube. A714 Grade III ERW tube is produced according to the standard ASTM A714. A714 Grade III ERW tube testing and inspection as following: chemical analysis, tensile test,

ASTM A714 grade II ERW pipe is standard specification for high-strength, low-alloy welded steel pipe. A714 grade II ERW pipe is produced according to the standard ASTM A714.

ASTM A714 grade I ERW pipe is not same as the ordinary welded pipe, A714 grade I ERW pipe is made up of the steel strip, and the ASTM A714 grade I mechanical strength is much better than the general welded pipe.