.GOST 12821-80 welding neck stainless
Steel Flange is one of the most widely used
Flanges in the world. The GOST flange standard is widely used in Eastern Europe including Russia, Belarus, Ukraine, Kazakhstan, the former CIS countries and Mongolia. GOST12821 The PN10 and PN16 flanges are the most conventional, the most popular, and are commonly used. GOST 12821-80 welding neck stainless steel flange is made of high-quality stainless steel and forged by high-pressure equipment. It is a special kind of flange, commonly known as high-diameter flange. There is a welding groove on the top of its high-diameter. The use of WELDINGNECK flange is different from other flanges. And welding, connected, so it is also called butt welding flange.
The biggest feature of GOST 12821-80 welding neck stainless steel flange is good stability, strong corrosion resistance, acid and alkali resistance, and is widely used in the pipeline system of chemical, pharmaceutical, food, pharmaceutical and other special industries. Pumps and other equipment are connected to form a piping system. It facilitates the cleaning, inspection and maintenance of pipes. Reduced engineering costs.
In construction use, two pipes, pipe fittings or equipment are first butt-welded on the ports of the two flanges, between the two flanges, and flange pads are added, and
Bolts are used to fasten them together. The effective connection of pipelines,
Valves, pumps and other equipment accessories makes the whole pipeline become one and start to work normally.
It is an indispensable pipe fitting that must be used in pipeline systems and equipment such as machinery, petroleum, chemical industry, water conservancy, medicine, food, and papermaking.
Our GOST 12821-80 welding neck
Stainless Steel Flanges are standard in material, finely processed and priced in line with market demand. According to the needs of different markets and different customers, special shaped manufacturing can fully meet the requirements of customers and markets for different flanges. And we will inform customers of market needs so that they can quickly expand the market.
Types of GOST 12821-80 welding neck stainless steel flanges:
According to the model can be divided into: GOST 12821-80 WELDING NECK
According to the pressure can be divided into PN10, PN16, PN25, PN40, PN63, PN100
According to the process can be divided into: forged flange,
According to the material can be divided into: 304, 304L, 316, 316L, 321, 201
GOST 12821-80 welding neck stainless steel flange production process:
1) Forged flange blank
Cut stainless steel circular hacksaws of different specifications and models into cylindrical flange blanks, add them to a reverberatory furnace and heat them to 1300 degrees to take out, and then forge the flange blanks into gyro-shaped flanges by forging machines such as forging presses and air hammers.
2) Put the formed ring flange blank into the annealing furnace for annealing treatment to ensure the stability and consistency of the ring blank material
3) The annealed ring flange blank is processed into a ring flange on a CNC machine tool according to the drawing, and then the flange is drilled with a CNC drilling machine according to the drawing requirements, and the finished product is completed.
4) For the finished flange, the thickness, hole diameter, center distance, inner and outer diameter of the flange shall be inspected according to the drawing requirements.
5) The flanges that have passed the inspection will be laser-printed on the flange end face according to the customer's requirements, and the flanges will be individually packaged according to the customer's requirements, and then put into wooden boxes for transportation.
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