Insulating joints in comparison with foreign products, analysis, basic research focused on research and development for the design of gas transmission and distribution pipeline leakage problems often appear to retain the excellent performance of foreign products, the use of "redundancy" design principle sealing structure design, more reliable sealing performance, while taking on the special structure designed to improve the ability of its resistance to bending loads, the formation of patented products with independent intellectual property rights. "U"-ring sealing system (double-ring structure) sealing system architecture is the "U" word like a square cross-section, and placed in a closed ring structure inward opening. Placed in the middle of the metal parts steel insulated joints, structural symmetry, limit the pressure cycles destroyed, with increasing external pressure, internal reaction is automatically adjusted pro rata to withstand the internal structure of insulating joints due to external pressure resulting from deformation. The sealing system can play a long-lasting good seal, "U"-ring devices have been widely used in insulation products, insulation joint connector consists of the following component parts: a short section with flange Ⅰ, Ⅱ welded flange left and right ducts, fixed ring, insulating gaskets, seals, insulation filler, the insulating coating and the like. In the left of the insulating joint between the catheter and right butt end face and the sealing gasket interposed insulating member to form a double seal structure having insulating properties. Retaining ring groove welding or using a direct two forms with the right catheter welding, the insulation and the upper and lower duct wrap securely sealed insulated steel fittings factory, a "sealed container", which not only ensures good insulation effect Hebei steel insulated joint manufacturers, but also improves the insulation joint tensile, bending and pressure, such as excellent mechanical properties. To achieve low leakage load must be reduced in direct contact with the earth (i.e. to reduce the impact of the pipeline and connected to earth). To this end, the pipeline coating should be used, and to avoid and prevent those devices have a low incidence of resistance to ground electrical connection. In order to achieve a low leakage loading pipe, it is first necessary to use a sufficiently high resistance coating. Corrosion layer receives damage during construction or heat occurring in the construction and operation of the impact load increase will cause leakage. Information about the application of steel pipe coating is detailed references. May receive greater stress in the pipe coating places (such as pipes and more stones in the region), if no additional protective measures, it is necessary to choose more resistant to penetration momentum and anti-corrosion layer. Important considerations are: (1) increase the thickness of the coating; (2) an additional layer on the asphalt tape bandage pipe coating; (3) anti-rock damage layer; (4) for the additional fiber cement cladding layer; ( 5) To prevent the roots, roots pierce the coating can be used polyethylene, epoxy, polyurethane tar or polymer adhesive tape. If contact with low resistance grounding device, low leakage loading pipeline coating quality will be offset. This happens in the use of electric valve custody transfer stations, tubular annular space between the casing and the concrete structure, internal connections and valves bearings, as well as on the external lines and cables. To take measures to avoid such contact in the structure. Insulated steel fittings, steel insulated joint factory in Hebei, Hebei billion gold insulated joint is provided by a professional production of gold Hebei billion pipeline. Welcome to consult Hebei billion Gold Pipe Manufacturing Co. (www.yijinguanjian.com), be sure to specify when contact is through the "Business Alliance Member" see, thank you! Contact: Alan Li Tong