ERW Steel Pipe

ERW Casing Casing can both be seamless steel pipe and ERW. We’ll talk about  ERW casing ’s outer diameter, length, regular standard and steel grade, ends and surface treatment for casing and tubing. For ERW casing: OD: 114.3mm to 508mm. Length: R2 & R3. --R2 is from 7.62 meter to 10.36 meter. --R3 is from 10.36 meter to 14.63 meter. Regular standard and steel grade: API 5CT PSL1/PSL2: H40, J55, K55, L80, N80 etc. Ends: BTC, STC, LTC, VAM TOP, etc. Surface: black or varnished coating. Abstract from  Xinyue Steel

Effect of Roller Adjustment on the Quality of ERW Pipe In the production of  erw pipe , there is a process called roll adjustment. In the production process, the roll damage or wear serious, the need to replace some of the roll on the unit, or a continuous production of a certain number to meet the needs of the entire roll replacement. At this time should be conditioning rolls, in order to achieve outstanding steel quality. Such as the roll conditioning is not good, easy to form steel pipe seam changes, lap welding, marginal waves, drum kits and pipe body surface with indentation or scratches, oval steel pipe and other shortcomings, therefore, roll change should grasp the roll conditioning tips. 1, Replace the standard steel pipe, usually the whole roll to be replaced. Roller conditioning approach is: with wire from the entrance to exit pull a base line, adjust, so that each hole in a base line, and make the molding line with the skill requirements. Replacing the standard ro...

What is ERW Pipe? A pipe formed by Electric Resistance Welding or   ERW having   one vertical seam without addition of any metal is called ERW pipes or tubes. It can be available in varied diameters and wall thickness. The sizes of pipes ERW pipes can range from 2 3/8 inch to 24 inch outer diameter and length can be over 100feet. How ERW Pipe is made? First the iron is flatten then place it into roller to form a tube and passes through a welding electrode made of copper disk which is connected to a revolving transformer. When the electrodes contact each side, the temperature is increased to the welding point. Once the tubes leaves the electrodes, the inside flash is removed by after colling the tube with a hammer and the outer flash by a cutting tool. The surface finish could be either bare or coated. Qualities of ERW Steel Pipes: Before reaching the market place, ERW steel tubes and pipes are routed through numerous tests including a hydro-test, an ultrasonic weld ...