Spiral welded pipe: the low-carbon carbon structural steel or low alloy steel strip according to the angle of the spiral line (called the forming angle) rolled into the tube, pipe and then welded together made, it can narrow strip the production of large diameter steel pipe. Spiral welded pipe for oil and gas pipelines, its specifications OD * wall thickness. Spiral welded side welding and double-sided welding, the pipe should ensure that the hydrostatic test, the weld tensile strength and cold bending performance to meet the requirements. 
 Spiral welded pipe production and spiral welded pipe technology features 
 1, production program 
 Leasing land in Chengdu, the establishment of factories, equipment moved to Chengdu factory production. 
 2, the device 
 The host: WILSON BYAND British manufacturing BYAND-2000 tube unit, the unit is a segmented assembly, the total weight of about 130 tons, removable divided into four main parts of the monomer transport, suitable for the arrangement of equipment in the field , on-site production, on-site supply of steel pipes. The unit overall performance parameters are as follows: 
 Minimum pipe size Φ400 × 5.0mm, the maximum Φ3048 × 25.4mm 
 The pipe length is 6 ~ 30m up to 80m 
 Raw plate width minimum 700mm, maximum 2000mm 
 Coil weight up to 40 tons 
 Material grades up to the APIs 5L × 65 
 Inside and outside in a timely manner butt welding machine LINCOLN DC-1500 
 The main drive reducer DAVID BROWN RADICON 
 Plasma-type cutting machine LINCOLN PRO-CUT 125 
 Hydraulic system VICKERS, DENISON 
 Electronic control system SIEMENS, ABB 
 3  process 
 Open book - the last volume - leveling - butt welding - Milling - molding - welding - Weld - Cut pipe - break - follow-up welding - hydraulic test 
 (4) the inspection process 
 Inspection of raw materials - school level test - butt welding inspection - forming test - welding inspection - outside welded Inspection - cut pipe inspection - Ultrasonic inspection - inspection of the groove - Dimensions and Inspection - X-ray Inspection - hydrostatic test - the ultimate test 
 5. Anti-corrosion 
 ? Domestic anti-corrosion materials commonly used cement mortar, but also some non-toxic epoxy paint (thickness 0.4mm). 
 ? General domestic and international anti-corrosion coating spark test voltage 3000 V, up to more than 5000 volts, the high technical content of 10 kV. 
 To achieve good corrosion protection, the need to pay attention to look at two o'clock: 
 ? Sand strict working procedures to ensure that the quality rust and completed within a one hour spraying of internal and external primer, which is to ensure that the fundamental anti-corrosion quality. http://www.hbthgg.com spiral steel pipe http://www.thgangguan.com spiral steel pipe http://www.naimoguanjian.com pump tube