New type of insulating flange, the insulation joint on the structure of the old insulation flange reingistic improvement. Insulation flange is to have the sealing performance of buried steel pipeline requirements at the same time and required by the electrical method corrosion protection engineering electric insulation performance of the pipe flange joint. It includes a pair of steel flange, the insulation between the two flange seal, flange and fasteners and fasteners insulation parts and two pieces of the flange have been of a pair of short steel tube welding respectively. Insulation flange to the insulation joint is for many years to products industries such as petroleum, chemical industry, its structure is simple, the use of safe, reliable performance, has been widely applied and are welcome. Insulation flange products has formed series, when in special circumstances, can be designed and manufactured according to user requirements shall be separately.

A, product - this product is suitable for use in oil, gas, water and other medium electrochemical corrosion protection of buried pipelines, join. And the insulation protection.

Second, the classification, the product according to its insulation divided into specific pressure seal type insulation flange seal (hereinafter referred to as type I insulated flange) and the tight seal type insulation flange (hereinafter referred to as type II insulated flange) two kinds.

Three, characteristics, have buried pipeline corrosion protection engineering electrical method required by the electrical insulating performance; Under medium to the requirements of the temperature, pressure, long-term and reliable work, have enough strength and sealing performance; Reasonable structure, convenient assembly, disassembly, replacement parts.

Four, technical parameters, applicable temperature: 100 ℃ or less and pressure range: Pn0.6 MPa ~ Pn16MPa, product specifications: (~ 48 ")

Insulation joint is according to the problems existing in operation of insulating flange for improvement and upgrading of products, is indispensable in a steel pipeline cathodic protection system pressure components, are widely used in the steel pipeline cathodic protection system. Insulation joint with reference to foreign latest products structure, adopts the unique design, overcome the insulation flange rigidity is small, easy to leak, can not be buried, short service life and other ills, realized the function of buried free maintenance, make the service life of the insulating joint and supporting at the same line, insulating joint consists of the following parts: upper and lower tube, sleeve, insulation, seal, insulation coating. Under the insulation joint, pipe butt end pieces, with insulation parts and seals, form with insulation performance of the double seal structure.