Flat welded flange is a kind of pipe medium system which can be used for low pressure grade, small pressure fluctuation and little vibration problem.
In view of the fact that it uses the flat welding method to connect the pipeline, it is easy to achieve the corresponding in the welding assembly, and the market price of this kind of flange is relatively cheap, so the flat welding flange is widely used and promoted.
Prevent flange leakage
When the flat welded flange is connected in pipeline construction, the leakage phenomenon may occur due to some improper connection reasons. If that happens, we shouldn’t panic. First of all, it is necessary to find out the leakage part or check the part that may have a gap between the flange.
Under normal circumstances, for the flange leakage problem, should carefully check the sealing gasket and sealant, in addition to this there are many forms of removal of leakage, according to our conclusion, to achieve effective plugging is very necessary.
Between the specific valve body and the fixture, when the flat welded flange is connected, the sealant injection should generally be carried out according to the ring shape
Usually, we can also carry out the connection of the short flange according to the flat welded flange in the injection link, to avoid potential safety risks of the valve body during the connection, resulting in the leakage of the flat welded flange.
In the process of flange injection, the fixture should move as far as possible in the direction of the small flange, or use the tooth contact card to carry out the limit, in the connection of the flat welding flange operation process, need to be carefully analyzed to carry out a reasonable arrangement.
In the connection of the flat welding flange, we also need to pay attention to several aspects: when using the flange and the cylinder to connect, the cylinder end face should be checked with a ruler, and the tilt size of the end face should not exceed 15mm during the measurement process
When the cylinder is connected with the flat welded flange, the vertical layer of the flange is measured by the flange bending rule. These measures can effectively avoid the leakage of the flat welded flange.
Solve stainless steel flat welding flange rust
Under normal circumstances, it is a chemical reaction, but other changes will also occur when rust conditions, such as impact with other carbon steel, welding, surface lattice changes encounter water and air oxidation, encounter chemical agents containing chloride ions, there will be oxidation, and so on.
It has the strength to resist atmospheric oxidation – that is, rust resistance, and also has the ability to resist corrosion in the medium containing acid, alkali and salt – that is, corrosion resistance.
However, the size of its corrosion resistance is changed with the chemical composition of its steel itself, the state of interaction, the conditions of use and the type of environmental media.
Such as 304 steel pipe, in a dry and clean atmosphere, there is absolutely excellent rust resistance, but move it to the seaside area, in the sea fog containing more salt, there will be signs of rust.
