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Steel Fittings, High Pressure
Steel Fittings, High Pressure
Metro Mechanicals offers high-pressure Steel Fittings, manufactured to IS standard specifications 2353 and IS 8801-1978. They are manufactured to suit mm 00 (DIN 2391) pipes as well inch OD and NB pipe sizes (ASTM A 63-68 OR IS 1239: 1968 8S 1387: 1967). Metro fittings with ferrules are of three-piece design consisting of body portion, a coupling nut and a ferrule. During the assembly of the fitting on a tube, the coupling nut is progressively tightened causing the hardened ferrule to slide along the inner conical seat of body and grip the tube. During the further lighting, force exerted makes the ferrule's leading edge bite into the tube throwing up a visible collar of displaced metal which acts a metallic interlock and makes the joint leak proof at high pressure. On making the joint the ferrule is altered in shape and its leading edge becomes embedded into the tube. When the joint is broken, the ferrule remains permanently attached to the tube end. It offers safety, simplicity and reliability, which cannot be, achieved any other design of fittings. Material and finish: Metro fittings, nuts and ferrules are manufactured from low carbon bright steel bars and flats. They are phosphated and oiled for rust prevention and ferrules are heat treated and cadmium plated.