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ANSI ASME B16.47 Threaded Pipe Flanges

ANSI ASME B16.47 Threaded Pipe Flanges

Flanged pipe fitting is a welded pipe fitting.Such fittings are used to match pipes.

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Compared with the high pressure flange, the welding rod with the neck flange has high consumption, long welding time, can't withstand high pressure and high temperature and repeated bending and temperature fluctuation. However, the site installation is relatively simple, which can save the procedure of welding seam beating and rubbing injury.Flange is generally in high precision, rigid high speed hammer or friction press on the machine to die forging, its mold design and production requirements accurate, the application of non-oxidation heating and excellent lubrication technology for high quality blank die forging, its annealing program, generally suitable for several pressure processing steps between the intermediate annealing.The purpose of annealing of threaded flange is to eliminate the working hardening and internal stress existing in forging, improve the plasticity of flange, and facilitate machining or pressure machining with large deformation degree.The flange is mainly annealed at high temperature.The new process of rapid annealing is used to replace the original high temperature annealing process.For flanges requiring heat treatment and reinforcement with high plasticity and low strength and fast annealing but not up to the specified requirements, complete annealing method should be adopted.The cleaning and repair of flanges with necks play an important role in die forging process.Due to the poor fluidity of flanges and the high adhesion of molds, flanges with necks are easy to skin, crack, fold and other shortcomings.

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