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Technical Articles

Forming and Manufacturing Technology of Anchor Flanges

  • Posted: 09/24/2024 02:09:12
  • Hits: 21

An anchor flange is a key component in large-diameter, high-pressure, long-distance gas (oil) pipeline systems. This paper presents independent research and development work on the production technology of large anchor flanges. The structural parameter design was conducted by combining theoretical...


Structure and Materials of Anchor Flanges

  • Posted: 09/07/2024 02:09:45
  • Hits: 13

Anchor flanges are key components in long-distance gas (oil) pipeline transmission projects. They are welded onto the main gas (oil) pipelines and secured with cement piers. They are either half-buried or fully buried underground to prevent excessive pipeline displacement caused by combined forces such...


Flanges for Pressure Vessels

  • Posted: 07/14/2024 04:07:43
  • Hits: 133

Flanges are essential components in the design and construction of pressure vessels. They connect pipes, valves, and other equipment to the vessel, ensuring a secure and leak-proof seal. Flanges play a crucial role in maintaining the structural integrity and safety of pressure vessels.   Types...


An Introduction to Socket Welded Neck Flanges

  • Posted: 07/03/2024 03:07:23
  • Hits: 12

A welded neck flange is a type of flange used in piping systems to provide a secure, reliable connection between pipes, valves, pumps, and other equipment. It is designed with a long, tapered hub that is welded to the pipe. This design provides reinforcement in the flange area, reducing stress and ensuring...


Heat Treatment & Mechanical Properties of ASTM A350 LF3 Flanges (Part Two)

  • Posted: 05/28/2024 08:05:48
  • Hits: 80

3. Process tests The flange forging deformation must be sufficient; the total forging ratio should be greater than and equal to 6.0, and the final forging temperature should not be lower than 850℃. Rough machining should be performed after forging. According to literature reports, ASTM A350 LF3 steel...


Heat Treatment & Mechanical Properties of ASTM A350 LF3 Flanges (Part One)

  • Posted: 05/07/2024 07:05:41
  • Hits: 132

Abstract ASTM A350 LF3 steel blind flanges and butt-welded flanges of different sizes need to be tempered to meet the requirement for mechanical property. In addition to the chemical composition of the steel, to determine the appropriate tempering process, ASTM A350 LF3 steel test block...


High-pressure Wellhead Device Valve Body End Threaded Flanges

  • Posted: 02/20/2024 01:02:49
  • Hits: 15

In the high-pressure oil and gas wellhead devices produced by some manufacturers in China, the end face of the valve body adopts a structural design with a threaded flange and an octagonal steel gasket seal. Since the connecting flange is not in contact with the medium, the valve body is easy to forge...


Threaded Flanges at the End of Valve Bodies of High-pressure Oil & Gas Wellhead Devices

  • Posted: 11/15/2023 01:11:00
  • Hits: 42

Abstract: The structure of the threaded flange at the end of the valve body of the high-pressure oil and gas wellhead device is introduced. The strength calculation method of this type of threaded flange and its common specifications and dimensions are given. The threaded flange is safe and reliable...


Why Do Stainless Steel Flanges Crack?

  • Posted: 10/19/2023 02:10:39
  • Hits: 75

Stainless steel flanges will crack during use, so what are the reasons for cracks in stainless steel flanges? Let’s analyze them together.   Physical and chemical analysis First, the chemical composition of the cracked flange was analyzed. The analysis results showed that the chemical composition...