There are several forms of flexible interfaces for Spigot Cast Iron Pipes
Socket type cast iron pipe rigid interface antiallergic can, under the action of external force, no tower water supply equipment interface packing easy fragmentation and leakage, especially in the weak foundation and uneven subsidence area and the earthquake zone. The interface damage rate is higher. Therefore, flexible interfaces should be adopted under the above unfavorable conditions.
Japan's Kubota ductile mechanical interface, in recent years has been introduced to China. As in the Beijing water pipeline construction from the Miyun reservoir to the Huairou reservoir, the use of a large number of nodular type DN2600mmK mechanical interface of cast iron pipe.The mechanical interface of ductile iron pipe is divided into A and K. The tubes and fittings are made of ductile iron, straight pipes, screws, bolts and rubber rings.The mechanical interface has good sealing performance. When the water pressure reaches 2MPa in the test, there is no leakage. The axial displacement and the angle of folding all reach a high level, but the cost is higher.
China's production of "GB 13295-1991 centrifugal casting ductile iron pipe)," GB13294-1991 "provisions of nodular cast iron pipe annealing, centrifugal casting, water for ductile iron pipe pipe, pipe fittings, rubber technical performance, the interface type adopts slip type T shaped interface.
At present, the flexible interfaces include slip type rubber ring interface, R rubber ring interface, flexible mechanical interface, A type and flexible mechanical interface, K type.1. slip in rubber ring interfaceRubber ring and pipe are supplied by supply factory. A rubber ring is installed before the socket in the working surface and no tower water supply equipment Jack working surface cleaned, the rubber ring embedded concave socket tip in the rubber ring, and the exposed surface and the socket of the working face, coated with lubricant has no influence on the quality of the rubber ring. The water supply equipment socket end chamfering and rubber ring even after contact with special tool socket socket will push, push people to mark depth should be set in advance, before the festival, before the two push interface depth and review has been.
