Flanged fittings Joins pipeline or vessel with flanges. The advantage is the possibility of repeated assembly and disassembly of the piping., A good tightness of joints and convenience of their braces, high strength and applicability to a wide range of pressure and passes. Disadvantages – the possibility of easing tensions and loss germetichnostiso time, large dimensions and weight. This product can produced by various technological processes. The most widely used forging, stamping, molding by conventional methods (open method smelting) with a machined billet. These staff technologies are and the advantages and disadvantages. At present, oil and gas processing plants and chemical industry for connecting various pipelines widely used product in the form of ring-type flange blanks.
They are manufactured according to GOST 12820-80, GOST 12821-80 Steel 20 09G2S, 10G2, 2X13, etc. 08X18N10T and operate at high pressures and harsh climatic conditions, with sharp temperature drops transportable media, and so are the details of critical applications, subordinate Gosgortechnadzor Russian company specialized Engineers Union, and fully certified company producing this product has all the certificates of conformance Gosgortechnadzor the Russian Federation. The advantages of traditional casting techniques are high precision parts with minimal tolerances for machining and high utilization of the metal. Among its disadvantages include poor quality of the metal and the difficulty of obtaining solid pieces, because the melting and casting the melt is saturated with gases, non-metallic inclusions and harmful impurities and is prone to structural and chemical heterogeneity. For these reasons, other billet parts for the manufacture of critical applications virtually do not apply.