Plant Building Structure - LSAW Steel Pipes DN1150

For plant building structures, DN1150 LSAW pipes are commonly produced using Q355B or S355J2H structural steel plates. Q355B steel provides a minimum yield strength of about 355 MPa with tensile strength typically ranging from 470 to 630 MPa, offering excellent load-bearing capability for heavy structural applications. The controlled chemical composition with carbon generally below 0.20 percent and manganese around 1.60 percent helps maintain a good balance between strength and weldability.

Huayang Steel Pipe manufactures these large-diameter structural pipes using the JCOE forming process, which ensures precise circularity and uniform wall thickness along the entire pipe body. The longitudinal seam is welded using double submerged arc welding, delivering deep penetration and consistent weld strength. Comprehensive inspections including ultrasonic testing of the base metal, weld seam non-destructive examination, and dimensional verification are performed to ensure structural reliability when the pipes are used as columns, load-bearing frames, or large-span support members in industrial plant construction.