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Credibility ,Flat welded flange is a kind of flange
connected with fillet weld of container or pipeline. It belongs to arbitrary
flange. According to the integrality degree of the connection between the
flange ring and the straight cylinder section, the integral flange or the loose
flange are checked separately in the design. There are two kinds of flange
rings with neck and without neck. Compared with the butt-welded flange with
neck, the flat-welded flange has simple structure and less material
consumption, but its rigidity and sealing are not as good as the butt-welded
flange with neck. Flat welded flanges are widely used in connection of medium
and low pressure vessels and pipes.
Flat welded flange is often used in the
case of medium temperature and pressure are not high and medium corrosion is
strong. When the corrosive medium is strong. Rare integral flanges are flat
welded flanges and butt welded flanges. Flanged fittings refer to fittings with
flanges (flanges or joints). It can be cast. Flat welded flanges are mainly
parts that connect pipes to pipes. According to the structure type. It can also
be made up of threaded connection or welding. Flange connection refers to a
pair of flanges, a gasket and a number of bolts and nuts.
The main design disadvantage of flat welded
flange is that it can not guarantee no leakage. This is the shortcoming of its
design: the connection is dynamic, and the movement between flange surfaces
will be caused by thermal expansion and fluctuating periodic loads, which will
affect the function of flange, thus impairing the integrity of flange and
eventually leading to leakage. Any product can not be without defects, but try
to control the insufficiency of the product to the minimum, so the company in
the production of flat welding flange as far as possible to improve the
performance of the product, so that it can play a maximum role.
Flat-welded
flange not only saves space and reduces weight, but also ensures that the joint
does not leak, and has good sealing performance. The reason why the size of
compact flange decreases is that the diameter of the seal is reduced, which
will reduce the cross section of the sealing surface. Secondly, the flange
gasket has been replaced by the sealing ring to ensure that the sealing face
matches the sealing face. In this way, only a small amount of pressure is
needed to press the cover tightly. As the required pressure decreases, the size
and quantity of bolts can be reduced accordingly, so a new product with small
size and light weight (70%-80% less than the weight of traditional flange) is
finally designed. Therefore, flat welding flange is a relatively high quality
flange product, which reduces the quality and space, and plays an important
role in industrial applications.
The two sealing faces of bolts extrude each other flange gasket and form a
seal, but at the same time, it also leads to the destruction of the seal. In
order to keep the seal, it is necessary to maintain a huge bolt force, for this
reason, the bolt has to be made bigger. Larger bolts match larger nuts, which
means larger diameter bolts are needed to create conditions for tightening
nuts. However, the larger the diameter of the bolt, the more flexible the
flange will be. The only way is to increase the wall thickness of the flange.
The whole device will require a great deal of size and weight, which becomes a
special problem in the offshore environment, because in this case, weight is
always the main problem that people must pay attention to. Moreover, in
essence, flat welded flange is an ineffective seal, which requires 50% of the
bolt load to be used to extrude gaskets, while only 50% of the load to maintain
pressure is left.
Cutting Flange with Steel Plate
Generally, the steel plate produced by the
regular enterprise, the raw material is more regular, the small aperture is more
easily processed, the tread is relatively flat, the cost is lower, and the
quality is also able to.
Large caliber flange
Generally, it is made by cutting and
heating the steel plate, and the raw material is not good. Only the center will
have an interface to be welded. Although no weld can be seen in the future, it
is still not advocated to be used in high-pressure pipelines.
Good raw materials, high density, high
price and good quality.
Flat welded flange has certain technical
requirements and parameters in production and use.
Source: China Stainless Steel Flanges Manufacturer - Yaang Pipe Industry Co., Limited (www.yaang.com)
Tel No:+86-18267732328 / Email:[email protected]
Address:Longwan District, Wenzhou, Zhejiang Province, China.
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