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Table d flange is the kind of flange that the DN stands for 'Diameter Nominated.Put simply, it is a rough translation of mm from imperial sizes, assuming that an inch is 25mm.We can refer it to a 12" flange as DN300, when in fact it is 304mm. Moreover,the facing method of it are rust preventing oil, spray paint (black, yellow), hot galvanization, cold galvanization or colored electroplate, powder coating and so on.Also the main materials of it also include carbon steel, stainless steel and alloy steel.Besides,the types of jointing faces of it are raised face; ring joint face; tongue and groove face; male and female face; lapped joint; flat face; threaded.The usually used connection of it also always are welding. Above all,the usage of Table d flange also are connecting pipe line and keep its leakproofness; convenient for replacing pipe line; easy to separate and check the situation of pipe line; easy to seal pipe line, such as oil, petroleum, gas, chemical industry, nuclear power station, water and nuclear power construction, shipbuilding, food manufacturing, construction, shipbuilding, paper making, medicine, and other industries.They are often widely used in many industries, such as Petrol Industry, Power Industry, Chemical Industry, Light Industry, Metallurgical Industry, Shipping Industry, and Urban Construction and so on.