Gost welding neck steel flanges

Gost12821welding neck carbon Steel Flange is made of high-quality 20# material and forged by high-pressure equipment. It is a special flange, commonly known as high-diameter flange, which has a welding groove at 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. Gost12821welding neck flange is the most widely used in the medium and high pressure system of industrial pipelines, especially in the pipeline systems of oil fields, natural gas, oil refineries, chemical plants and heavy industrial enterprises due to its excellent welding connection method.
  Gost12821welding neckt carbon steel flange is a detachable connection. 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.
  Gost12821welding neck Carbon Steel Flanges are widely used in medium and high pressure pipeline systems and equipment such as machinery, petroleum, chemical industry, water conservancy, electric power, shipbuilding, etc., and are important pipeline accessories.
    Our Gost12821welding neck carbon steel flanges are made of standard materials, finely processed and priced in line with market demand. According to the needs of different customers in the Russian market, we carry out special shaping and manufacturing to fully meet the requirements of customers and the market for flanges. And we diagnose the market demand, communicate with customers extensively, so that they can quickly expand the market.
Types of Gost12821welding neck carbon steel flanges:
According to the model can be divided into: welding neck,
According to the pressure can be divided into: PN6, PN10, PN16, PN25, PN40, PN63,
According to the process can be divided into: forged flange,
According to the material can be divided into: carbon steel flange, stainless steel flange, alloy steel flange
ANSI B16.5 150LB Welding neck American standard carbon steel flange production process:
1) Forged flange
Saw high-quality billets of different specifications and models into flange blanks, add them to a reverberatory furnace and heat them to 1000 degrees and take them out, and then forge the flange blanks into gyro-shaped flanges by forging machines such as forging presses and air hammers.
2) The forging or casting gyro-shaped 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, and the finished product is completed.
3) For the finished flange product, the thickness, hole diameter, center distance, inner and outer diameter of the flange shall be inspected according to the drawing requirements.
4) The flanges that have passed the inspection will be typed on the end face of the flange according to the customer's requirements, and the flange will be anti-rust treatment according to the customer's requirements, 1: black anti-rust paint, 2: anti-rust oil, 3: galvanized, Then put into wooden boxes for shipping.