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Stainless steel flanges generally have insufficient load-bearing strength, and cannot be used on all high-pressure pipelines until the appearance of neck-welded flanges improves the load-bearing strength of the flange.
so that various high-pressure pipelines can be used.
Stainless steel high-pressure flanges are one of the pipe fittings, which have been used in various fields now.
According to the different scopes of application of butt welding flanges, the environments that need to be used are also different, and they need to be used according to certain conditions.
The butt welding flange has corresponding rigidity and elasticity requirements and a reasonable butt welding thinning transition.
The distance between the welding port and the joint surface is large, and the joint surface is free from welding temperature deformation.
Pipelines with large temperature fluctuations or high-temperature, high-pressure and low-temperature pipelines are generally used for the connection of pipelines and valves with a PN greater than 2.5MPa;
they play an important role and value in the connection of pipelines, but the nominal pressure must be guaranteed at a certain level during use. in the range.
The sealing surface of the butt welding flange can be made into three types: smooth type, concave-convex type and tongue and groove type, and the application volume of the smooth butt welding flange.
Stainless steel high-pressure flanges, it is suitable for pipelines with large fluctuations in pressure or temperature or pipelines with high temperature, high pressure and low temperature.
The eight-shaped flange blind plate is formed by the blank along the axis direction, and the horizontal projection of the forging is mostly uniform and symmetrical.
When selecting die forging steps, according to the degree of difficulty of forming, it is divided into ordinary forgings, high wheel hubs, deep hole forgings, etc.
By removing the oxide skin on the cylindrical surface of the billet, and then turning the billet up and gently upsetting, the oxide skin on the end face is removed.
The diameter of the thick blank should exceed the wheel spoke and reach the middle of the rim, so as not to cause folding and fill the hub.
The diameter of the flange cover is relatively large, and it can be used when a forging hammer cannot be placed on the platform.
Combined forging with two forging hammers.
The high gold flange is one of the most widely used equipment components in the petrochemical industry and is an important pipeline equipment in the petrochemical industry.
According to the connection of the flange, it is divided into integral flange, loose flange and arbitrary flange.
According to different mechanical performance requirements and environmental performance requirements, alloy flanges need to be changed to different materials to meet the needs of these working conditions.
For example, the requirements of the food industry for pipeline flanges are obviously sanitary.
Therefore, sanitary alloy steel flanges will be used in such food companies as beer, beverage and cooking oil;
nickel steel flanges are due to their excellent compressive stress and Low-temperature resistance used in pressure vessels and cryogenic vessel piping;
chrome steel flanges are used in chemical pipelines due to their anti-corrosion and anti-oxidation properties;
in addition, by changing the content of chromium in alloy steel flanges and adding other alloying elements, It can also be used in the field of marine oil exploration aviation lights.
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