Rolling metal and then welding it longitudinally along its length creates Electric Resistance Welding (ERW) pipe. ERW pipe has welded joints throughout its length, whereas seamless pipe is made by extruding metal to the desired length. There is no welding or connections on the seamless pipe, which is made from solid round billets. In diameters ranging from 1/8 inch to 26 inch OD, the seamless pipe is completed to specifications and wall thickness requirements. Hydrocarbon industries and refineries, oil and gas exploration and drilling, oil and gas transportation, and air and hydraulic cylinders, bearings, boilers, and vehicles are all examples of high-pressure uses.