In pipeline construction, the stainless steel flanges often seen in pipe fittings, in view of the excellent characteristics of stainless steel flanges in many aspects, so it has many aspects of application in large-scale pipeline construction.
But in view of the stainless steel flange such parts itself is not a commonly used part, so many people do not understand the flange, so what is the flange? What are the benefits? Let’s take a look
Stainless steel flange benefits
Stainless steel flanges enjoy quite good corrosion resistance, so they can ensure the engineering integrity of the construction parts. The nature of different stainless steel flanges is also different.
For example, chrome-containing stainless steel flanges enjoy higher mechanical strength and higher tensile strength, which in turn makes parts easier to cast and can take into account the needs of architects and structural designers.
Stainless steel enjoys excellent corrosion resistance and can achieve long-term design integrity. It is easy for manufacturers to process and manufacture, taking into account the evolving capabilities of architects and designers. All metals react with atmospheric oxygen to form an oxide film on the surface.
For example, the oxide film on the surface of ordinary steel pipes is also relatively loose, the spacing area is large, and there is no way to prevent further corrosion of water and air, so the oxidation will continue to expand.
In contrast to carbon steel pipe fittings, stainless steel pipe fittings can generate layers of tight oxide film on the surface of stainless steel pipe fittings, which can block the progressive oxidation of water and air. It is precisely this point that stainless steel enjoys excellent oxidation resistance and corrosion resistance.
Use stainless steel flanges for steps
Stainless steel flange in use to avoid due to the flange cover heating, resulting in eye erosion, so the welding current is not too large, less than carbon steel welding rod before and after 20%, arc is not suitable for too long, fast cooling between layers, to narrow weld bead is appropriate.
When the electrode is used, it should ensure that the air of the electrode is dry, and the calcium type should be continuously dried at 150 ° C for 1 hour
Low a hydrogen type should be dried for 1 hour by air at 200-250 ° C, and can not be repeatedly dried to avoid the coating splitting off, avoid the coating of the electrode sticking oil or other debris, in order to prevent the carbon content of the weld from being increased, which will affect the quality of the weldment.
