Ratnamani Metals and Tubes Ltd. Manufacture High Frequency Welded Electric Resistance Carbon Steel Pipes. Ratnamani Metals and Tubes Ltd. Is an ISO 9001:2000 certified company. High Frequency Welded Electric Resistance Carbon Steel Pipes are made from hot rolled flat steel strip, formed into tubular shape and the longitudinal seam is welded by the application of heating the edges through high frequency induction coil and by squeezing the edges. High Frequency Welded Electric Resistance Carbon Steel Pipes is available in 6NB to 16NB size ranges. The thickness of these pipes is 3.00mm to 12.70mm.
