NON-WELDED SEALED FITTINGS FOR SMALL DIAMETER PIPELINES AND TUBING
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Abstract
An analysis of domestic and foreign designs of non-welded sealed fittings for small diameter pipelines and tubing is carried out, the grades of materials used are considered, the designs of fittings with clamping and thrust rings and fittings with a cutting ring are presented. The advantages and disadvantages of existing structures are analyzed, the possibility of using non-welded sealed fittings on pipelines transporting aggressive media that cause corrosive destruction of metal is considered. A new design of the fittings with clamping and thrust rings using rings made of two-phase duplex steel is proposed. The results of the hydrostatic strength of the structures under consideration after single and multiple assembly and disassembly of fittings on a pipeline made of stainless, corrosion-resistant steel of the austenitic type are given. An economic assessment of the feasibility of mass production of new fittings has been carried out.
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References
Fetisov, G.P., Karpman, M.G., Matyunin, V.M., Gavrilyuk, V.S., Sokolov, V.S., Sokolova, N.Kh., … Gol'tsov, V.A. (2001). Materialovedenie i tekhnologiya metallov. Moscow: Vysshaya shkola. (In Russ.)
Rybasenko, I.D., Yakubovskii, L.A. & Kagan, I.Z. (1951). Tekhnologiya izgotovleniya khimicheskoi apparatury iz nerzhaveyushchei stali. Kyiv: Gosudarstvennoe nauchno-tekhnicheskoe izdatel'stvo mashinostroitel'noi literatury. (In Russ.)
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