Large Diameter Spiral Welded Steel Pipe1,Website:http://www.sinosteelpipes.com,Specification:Material: Q235A,Q235B,0Cr13,1Cr17,00Cr19Ni11,1Cr18Ni9,0Cr18Ni11Nb,16Mn,20#,Q345,L245,L290,40#,60#,X42,X46,X70,X80,X100Standard: SY/T5037-2000; GB/T9711.1-1997; GB/T9711.2 B; GB/T9711-2011API-5L (PSL1, PSL2); SY/T5040-92; SY/T5037-2000. Outsize: Φ2020-3500mm; Thickness: 6~28mm. 2, Special Characteristic: Max Diameter: 3500mmMax Thickness: 28mm3,Main Manufacturer Process: Uncoiling - Rolling - leveling - butt welding - Milling - Forming - internal welding - outside welding - cutting - break - up welding - Pressure testing-Pack and stock4,Other details:    Length: According to requirement. Packing detail: Standard seaworthy export package or as your demand.    Payment Terms: 30% T/T deposit in advance, 70% T/T balance against copy of B/L. L/C at sightPort of dispatch: Qingdao; Tianjin5,Production Line show:     (1).Production line(2).Finished product(3).Our warehouse6. Adavantage:    As one of the biggest manufactures of China, we exported large quantity to American, Europe, Asia and Africa countries, due to high quality and reasonable price. Our price is very competitive because we are manufacturer, we are the source.