Big Diameter Structural Steel

　　Model NO.: big diameter structural steel, square steel pipe

　　Technique: Cold Drawn

　　Surface Treatment: Black

　　Section Shape: Square

　　Sample: for Free

　　Specification: 30*30MM--800*800MM

　　Type: Welded

　　Material: Carbon Steel

　　Usage: Pipeline Transport, Special Purpose, Oil/Gas Drilling, Machinery Industry, Chemical Industry, Construction & Decoration

　　Our Advantage: Thick Wall Large Diameter Special Purpose