High-Performance Welded Flanges – Superior Sealing, High Temperature Resistance, and Durability for Industrial Applications

  • High-Performance Welded Flanges – Superior Sealing, High Temperature Resistance, and Durability for Industrial Applications

High-Performance Welded Flanges – Superior Sealing, High Temperature Resistance, and Durability for Industrial Applications

Welded flange is a commonly used flange form in pipeline connections, which can work under high pressure and temperature conditions. The structure of a welded flange consists of a flange body and a welding neck, which is connected together by bolts using a joint welded to the pipeline. The main characteristics of welded flanges are good sealing performance, high temperature resistance, and low leakage. They have been widely used in fields such as petrochemical, shipbuilding, aerospace, and have become many industry standards.

Range of external diameter: 100 mm to 15000 mm

Material: WCB、LCB、LC3、WC5、WC9、C5、C12

Flange sealing cover: 316 stainless steel strip or non-metallic strip, 316 SS casting, 316 SS worm gear fixture, closed groove chloroprene rubber layer, ECH rubber gasket

Delivery type: 30-60 days


Overview of Welded Flanges – High-Performance Pipeline Connections

Welded flanges are essential components widely used in pipeline systems to provide secure and durable connections under high-pressure and high-temperature conditions. These flanges consist of a flange body and a welding neck, which is welded directly to the pipeline, ensuring a robust and leak-proof connection. Welded flanges are preferred in industries where high sealing performance, temperature resistance, and low leakage are critical. They are extensively utilized in petrochemical, shipbuilding, aerospace, and other industrial sectors.

Key Features of Welded Flanges

  • Superior Sealing Performance
    Welded flanges offer excellent sealing capabilities, making them ideal for high-pressure and high-sealing environments. Unlike traditional gaskets, welded flanges provide more reliable seals, significantly reducing the risk of leakage and failure.

  • High Temperature Resistance
    Made from high-quality, heat-resistant materials, welded flanges can withstand extreme temperatures without compromising performance. These flanges remain stable even in high-temperature and high-pressure environments, minimizing the likelihood of cracking or failure.

  • Durability and Strength
    The flange body and welding neck are constructed from high-strength materials, ensuring long-term reliability. They exhibit excellent corrosion resistance, thermal stability, and can operate effectively for extended periods under harsh conditions.

Technical Specifications

  • External Diameter Range: 100 mm to 15,000 mm

  • Materials Available: WCB, LCB, LC3, WC5, WC9, C5, C12

  • Flange Sealing Materials:

    • 316 Stainless Steel Strip or Non-Metallic Strip

    • 316 SS Casting

    • 316 SS Worm Gear Fixture

    • Closed Groove Chloroprene Rubber Layer

    • ECH Rubber Gasket

  • Delivery Time: 30-60 days

Applications of Welded Flanges

Due to their superior sealing properties, high-temperature resistance, and durability, welded flanges are commonly used in various industries, particularly in pipeline systems. They are particularly preferred in sectors like:

  • Petrochemical Industry

  • Natural Gas Pipelines

  • Oil Refineries

  • Shipbuilding

  • Aerospace

These industries rely on welded flanges to connect equipment such as pipelines, valves, and pumps, ensuring safety and efficiency in critical systems.

Why Choose LTZC for Your Welded Flanges?

LTZC is a trusted supplier of high-quality welded flanges with years of industry experience. We offer welded flanges that meet the highest standards of performance, reliability, and durability. Whether you need flanges for high-pressure pipelines or high-temperature applications, LTZC can provide you with the ideal solution tailored to your specific requirements.

For a competitive quotation or more information on our welded flanges, please feel free to contact us.


Flange NPSInside
Diameter
Outside
Diameter
Bolt Circle
(BC)
Raised Face
(R)
Raised Face
(RF)
HH1Raised Face
Thickness (T)
T1Flat Face
Thickness (T2)
Bolt Hole
(B)
No. of
Bolt Holes
1/2″0.62″3.50″2.38″1.38″.063″1.19″0.84″1.88″.38″1.82″.62″4
3/4″0.82″3.88″2.75″1.69″.063″1.50″1.05″2.06″.44″2.00″.62″4
1″1.05″4.25″3.12″2.00″.063″1.94″1.32″2.19″.50″2.13″.62″4
1-1/4″1.38″4.62″3.50″2.50″.063″2.31″1.66″2.25″.56″2.19″.62″4
1-1/2″1.61″5.00″3.88″2.88″.063″2.56″1.90″2.44″.62″2.38″.62″4
2″2.07″6.00″4.75″3.62″.063″3.06″2.38″2.50″.69″2.44″.75″4
2-1/2″2.47″7.00″5.50″4.12″.063″3.56″2.88″2.75″.82″2.69″.75″4
3″3.07″7.50″6.00″5.00″.063″4.25″3.50″2.75″.88″2.69″.75″4
3-1/2″3.55″8.50″7.00″5.50″.063″4.81″4.00″2.81″.88″2.75″.75″8
4″4.03″9.00″7.50″6.19″.063″5.31″4.50″3.00″.88″2.94″.75″8
5″5.05″10.00″8.50″7.31″.063″6.44″5.56″3.50″.88″3.44″.88″8
6″6.07″11.00″9.50″8.50″.063″7.56″6.63″3.50″.94″3.44″.88″8
8″7.98″13.50″11.75″10.62″.063″9.69″8.63″4.00″1.06″3.94″.88″8
10″10.02″16.00″14.25″12.75″.063″12.00″10.75″4.00″1.13″3.94″1.00″12
12″12.00″19.00″17.00″15.00″.063″14.38″12.75″4.50″1.19″4.44″1.00″12
14″13.25″21.00″18.75″16.25″.063″15.75″14.00″5.00″1.32″4.94″1.12″12
16″15.25″23.50″21.25″18.50″.063″18.00″16.00″5.00″1.38″4.94″1.12″16
18″17.25″25.00″22.75″21.00″.063″19.88″18.00″5.50″1.50″5.44″1.25″16
20″19.25″27.50″25.00″23.00″.063″22.00″20.00″5.69″1.63″5.63″1.25″20
22″21.25″29.50″27.25″25.25″.063″24.25″22.00″5.88″1.75″5.82″1.38″20
24″23.25″32.00″29.50″27.25″.063″26.12″24.00″6.00″1.82″5.94″1.38″20

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