Flange selection in other places
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Author:佚名
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Published time: 2020-10-14
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It is not necessary to use stainless steel bolts for flanges. Stainless steel bolts are chosen for ease of disassembly (carbon steel is easy to rust). It can also be used in some special occasions where there is no fire. In this session of flanges,a variety of new items continue to appear, and in the steel pipe industry such as steel pipes, there is also continuous development to create high-end items to sell steel pipes. In fact, flanges are also slowly developing in the scope of steel. hair start to the flange belonging to it in the production blank flange, left flange member down hair, but these flange members to stay on the steel type manufactured blank flange. Flanges with neck butt welding, neck flat welding,
It is not necessary to use stainless steel bolts for flanges. Stainless steel bolts are chosen for ease of disassembly (carbon steel is easy to rust). It can also be used in some special occasions where there is no fire. In this session of flanges,
a variety of new items continue to appear, and in the steel pipe industry such as steel pipes, there is also continuous development to create high-end items to sell steel pipes. In fact, flanges are also slowly developing in the scope of steel. hair
start to the flange belonging to it in the production blank flange, left flange member down hair, but these flange members to stay on the steel type manufactured blank flange. Flanges with neck butt welding, neck flat welding,
socket welding and threaded flanges are generally made by forging or forging-rolling processes. Flange means is connected to two large-diameter pipe, often two sheets plus a number of flange bolts fastening flange is carbon steel
into a flange. Low-carbon steel with good strength and ductility, after adding an appropriate amount of carbon It will become hard and the plasticity will decrease and the strength will increase. The flange connection may need to withstand high tensile, compression, torsion, and shear strength. The
flange is a better choice. The butt weld of the ring should be welded After heat treatment, 100% radiographic or ultrasonic flaw detection is performed, and the radiographic flaw detection meets the level II requirements of JB4730, and the ultrasonic flaw detection meets
the level I requirements of JB4730. When steel plate or section steel is used for manufacturing, the following requirements must be met:
1. The steel plate should be ultrasonically inspected without delamination defects;
2. The steel plate should be cut into strips along the rolling direction of the steel, and be bent but welded into a ring, and used The surface of the steel forms the cylindrical surface of the ring. It is not allowed to directly machine the steel plate into a flange with a neck;
3. The butt weld of the ring should be a full penetration weld; the use of carbon steel bolts does not necessarily need to add insulating gaskets and sleeves, plus insulating gaskets And sleeve barrels are only used
in the occasions where there may be live electricity or the fluid in the pipeline is inflammable and explosive. In this case, stainless steel bolts should be used with insulating gaskets and sleeve barrels.
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