Established in 1998, China Guanda Hose Technology Co., Ltd. is a professional weld neck flange manufacturer and wholesaler of hoses and tubes. Our annually capacity of various kinds of hoses is more than 5,000,000 meters. Our customized weld neck flanges products are applied in industrial equipment, hotels, villas, toilets, and kitchens. They are widely used in the field of aerospace, metallurgy, petrol-chemical, machinery, architecture, shipping, vacuum, power and light industries.

LAP JOINT FLANGES are primarily employed with lap joint stubs, the combined initial cost of the two items being approximately one-third higher than that of comparable welding neck flanges. Their pressure-holding ability is little, if any, better than that of slip-on flanges and the fatigue life of the assembly is only one-tenth that of welding neck flanges. The chief use of lap joint flanges in carbon or low alloy steel piping systems is in services necessitating frequent dismantling for inspection and cleaning and where the ability to swivel flanges and to align bolt holes materially simplifies the erection of large diameter or unusually stiff piping. Their use at points where severe bending stress occurs should be avoided. Orifice Flanges are widely used in conjunction with orifice meters for measuring the rate of flow of liquids and gases.

Plate Flanges, which are of wide variety, are manufactured mainly from plates. They are conforming to national & international standards and they are hubless. Plate flanges are produced from quality mill plates. Before cutting pieces out of plates, each plate is checked for serious laminations. They should be virtually free of voids, non-metallic inclusions and other defects. Another important property of plate is its weldability & hardenability. For more critical application of flanges, the hardness, strength and impact properties are also important factors. These properties vary through, along and across the section of the product as a result of temperature and microstructural variations during hot rolling, cold rolling or quenching and cooling. In choosing the type of orifice flange, the considerations affecting the choice of welding neck and slip-on standard flanges apply with equal force.