Thick-walled straight seam steel pre-cut panels thick straight seam steel pipe JOCE molding Ryoma 800 * 80 thick-walled straight seam steel pipe wall thickness of the largest producer of 80mm. Production process: JOCE cold forming Ryoma 800 * 80 thick straight seam steel products to participate in the 2009 Shanghai Exhibition steel pipe Dimensions: Diameter 800mm thickness of 80mm length of 12M. Measurements show actual foreign 801nn thickness of 79.5mm diameter length 12.02M Ryoma walled straight seam steel products made of exhibitors: X70 spot foreign material chemical content analysis results will be as follows: C 0.15 Si 0.44 Mn 1.6 sulfur phosphorus 0.024 0.019 0.05 Nb Antimony 0.05 V0.9 mechanical test data for: tensile yield 505 585 20 Ma exhibitors thick extending straight seam steel performance standards for API5LPSL1