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A Closer Look: Carbon Steel Welded Flanges Forged Butt Welded Flanges PN25 DN100

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November 24, 2025
Category Connection: Alloy Steel Flanges
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Tags:
#forged steel flanges #spectacle blind flange #reducing weld neck flange
Brief: Join us for a close-up look at this solution and see it in action. In this video, we provide a detailed walkthrough of Carbon Steel Welded Flanges and Forged Butt Welded Flanges, specifically the PN25 DN100 model. You'll see the construction of features like the loose flange welding ring and flat welded ring loose sleeve, and learn how their design ensures secure connections and cost-effective installation in piping systems.
Related Product Features:
  • Constructed from durable carbon steel for reliable performance in industrial applications.
  • Features a loose flange welding ring design for enhanced flexibility and ease of installation.
  • Includes a flat welded ring loose sleeve (PJ/SE) that is movable and ideal for connecting with expansion joints.
  • Designed with PN25 pressure rating and DN100 nominal diameter to meet standard piping requirements.
  • Allows for cost savings by using lower-grade flange materials paired with higher-grade pipe materials.
  • Facilitates easy alignment during construction with features to prevent bolt hole misalignment.
  • Suitable for use with special materials like plastic or fiberglass pipes where welding is challenging.
  • Incorporates design elements like holes in rods or thin rod bolts to prevent loosening under vibration.
FAQs:
  • What are the main applications for the PN25 DN100 Carbon Steel Welded Flanges?
    These flanges are primarily used in piping systems for water supply, drainage, and expansion joints, especially where cost-effective connections with special materials like plastic or fiberglass pipes are needed.
  • How does the flat welded ring loose sleeve flange design help in saving costs?
    The design uses a two-part structure where the flange is made from lower-grade material, while the pipe connection uses the same material as the pipe, reducing overall material costs without compromising performance.
  • What features ensure the flange connection remains secure under vibration?
    The flange includes design elements such as holes in the rod to prevent bolt vibration from causing loosening, and some models use thin rod flange bolts for better performance under variable forces.
  • Why is the flat welding ring loose sleeve flange suitable for difficult-to-weld materials?
    It provides a movable, bolted connection that avoids the need for direct welding, making it ideal for materials like plastic tubes or glass fiber reinforced pipes where welding is impractical or requires high strength.
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