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Intermediate Flange |
hydraulic flange |
High pressure hydraulic flange |
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Flange clamp |
High pressure split flange |
Stainless steel split flange |
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SAE butt welding flange |
SAE socket flange |
SAE threaded flange |
Product Name: Hydraulic Flange
Product specifications: NPS3/8 "-6"
Material:Q235、20#、45#、A105、16Mn、304、304L、316、316L、321
Standard: FH、HF、VF、VFM、SFJ、SFJN、WFJ、WFJN、ASF、BSF、CSF、DSF、ESF、FSF、GSF、GWF、GF-LK、WF-LK、AFS、GFS、DFS、AFW、FA、FK、FAG、FKG、JB/ZQ4485、JB/ZQ4489、JB/ZQ4488、JB/ZQ4487、JB/ZQ4486、SHA、SHB、SSA、SSB、LSA class
Product introduction: Hydraulic flange forging does not have a significant impact on rigidity, only a few cases show significant improvement during high-speed deformation. When transitioning from low deformation speed to high deformation speed, the deformation resistance increases by approximately 1 times with the degree of flange. Therefore, flange forging can be operated at both low and high deformation speeds. However, in order to increase the allowable deformation and improve manufacturing efficiency, reduce deformation resistance, and improve the flowability of the flange filling mold cavity, it is better to use forging or press forging for flanges than hammer forging. This is especially true for large flanges. When the flange is forged on a high-speed hammer, due to the high internal friction, deformation speed, and thermal effect, the temperature rise of the flange during forging is relatively obvious. Therefore, the initial forging temperature of the flange should be adjusted, and the heating temperature of the blank before forging should be taken as the lower limit of the original specified initial forging temperature. In addition, due to the poor fluidity and high external friction coefficient of flanges, if the deformation speed is too fast, it is easy for flat welding flanges to produce defects such as peeling and folding, and for low rigidity and high-strength flanges, it is also easy to cause cracking. So, flanges are most suitable for forging on low-speed hydraulic presses.
Hydraulic flanges have a lower neck size, slightly higher strength and load-bearing capacity than flat welding flanges. Compared with high-pressure flanges, welding rods with neck flanges consume more, have longer welding times, and cannot withstand high pressure, high temperature, repeated bending, and temperature fluctuations. However, on-site installation is relatively simple and can save the process of welding seam rubbing and injury. Flanges are generally forged on machines with high precision and rigidity, such as high-speed hammers or friction presses. Their mold design and production requirements are accurate, and high-quality blanks are forged using non oxidizing heating and excellent lubrication techniques. Their annealing program is generally suitable for intermediate annealing between several pressure processing steps. The purpose of hydraulic flange annealing is to eliminate work hardening and internal stress in forgings, improve the plasticity of flanges, and facilitate mechanical or pressure processing for those with significant deformation. Flanges are mainly annealed at high temperatures. Nowadays, the new rapid annealing process is gradually being applied to replace the original high-temperature annealing process. For flanges that require heat treatment strengthening and have high plasticity and low strength, but cannot meet the specified requirements after rapid annealing, complete annealing should be used. The cleaning and repair of neck flanges play an important role in the forging process. |
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