Ratnamani Metals and Tubes Ltd. Manufacture Instrumentation Stainless Steel Seamless Tubes and Pipes. Ratnamani Metals and Tubes Ltd. Is an ISO 9001:2000 accredited company. Instrumentation Stainless Steel Seamless Tubes and Pipes consist of a hot extrusion press, number of cold pilgering mills, draw benches, heat treatment furnaces, u-blending facilities and all necessary testing equipments to produce high quality tubes & pipes confirming to various international standards. Instrumentation Stainless Steel Seamless Tubes and Pipes are available in the thickness of 0.50mm to 6.00mm. The size of these stainless steel seamless tubes and pipes is 6.00 mm to 25.40 mm OD. It is used in oil and gas exploration, refineries & petrochemicals, thermal and nuclear power plants, chemical industries, fertilizer plant, aero-space, pharmaceutical, food and dairy application etc.