Long Weld Neck Flange

₹76 - ₹162

Minimum Order : 100 piece

Customization as per requirements


Long Weld Neck Flange – Specification

Specification Details
Flanges TypesSlip On, Weld Neck, Long Weld Neck, Threaded, Blind, Companion, Lap Joint
ClassAsa 300, 2500 Lbs Asa 150, 900 Lbs, 600 Lbs, 300 Lbs, 150 Lbs, 160, 1500 Lbs, Pn 6, 10, 16, 25, 40, 100, 64
Size1/2″ (15 Nb), 48″ (1200nb) Dn10~dn5000
TypeRaised Face (rf), Small Tongue, Groove, Flat Face (ff), Ring Type Joint (rtj), Large Male Female (lmf), Lap Joint Face (ljf), Small Male Female (smf), Large Tongue & Groove

Long Weld Neck Flange

 



Type of Sub-products

  • Standard Long Weld Neck Flange
    Standard Long Weld Neck Flange

    Standard Long Weld Neck Flange

    The most common style, featuring a straight, extended neck that gradually tapers to the pipe wall. Ideal for pressure vessels, heat exchangers, and nozzles where stress distribution and smooth flow transition are critical.

  • Heavy Barrel Long Weld Neck Flange
    Heavy Barrel Long Weld Neck Flange

    Heavy Barrel Long Weld Neck Flange

    Built with a thicker, reinforced neck wall for very high pressure or heavy mechanical loads. Frequently used on reactor vessels, tall distillation columns, and high stress piping systems.

  • Tapered Neck Long Weld Flange
    Tapered Neck Long Weld Flange

    Tapered Neck Long Weld Flange

    Features a gradually tapered neck for optimal stress transfer in high temperature and cyclic loading applications such as steam drums and superheaters.


Frequently Asked Questions

Where are Long Weld Neck Flanges typically used?

They are commonly used in petrochemical plants, oil refineries, offshore drilling platforms, high pressure steam lines, and power generation facilities. The elongated neck makes them perfect for vessels, columns, and reactor nozzles, where reduced vibration and uniform stress are critical. Industries select LWN flanges for reliable sealing in high pressure, high temperature, or corrosive environments.

What materials are commonly used in Long Weld Neck Flange ?

Manufacturers typically use ASTM A105/A350 carbon steel for general service, ASTM A182 F304/F316 stainless steel for corrosive media, and low alloy or exotic grades such as F11, F22, Duplex, Super Duplex, Inconel, and Hastelloy for high temperature or chemically aggressive applications. Material choice is driven by process conditions, pressure ratings, and corrosion resistance requirements.

What are Heavy Barrel Long Weld Neck Flanges?

A Heavy Barrel LWN Flange is a reinforced version with a thicker, more robust neck engineered for very high pressure or high stress applications, such as hydrocracker reactors, tall distillation columns, or heavy duty vessels. The added neck wall thickness increases fatigue life and supports greater mechanical loads.


Countries We Export – Long Weld Neck Flange

  • India

Cities We Supply – Long Weld Neck Flange

  • Mumbai
  • Lucknow
  • Nashik
  • Pune
  • Rajkot
  • Moradabad
  • Angul
  • Rudrapur
  • Hosdurg
  • Gandhinagar
  • Rajahmundry
  • Durgapur
  • Bharuch
  • Panipat

Industries We Serve – Long Weld Neck Flange

  • Sugar industry

    Sugar

  • Oil And Gas Industries industry

    Oil And Gas Industries

  • Paper Mill industry

    Paper Mill

  • Power Plant industry

    Power Plant

  • Bridge And Building industry

    Bridge And Building

  • Aerospace Industries industry

    Aerospace Industries

  • Automobile Industry industry

    Automobile Industry

  • Electrical Industry industry

    Electrical Industry

  • Defense Industry industry

    Defense Industry

  • Construction & Fabrications industry

    Construction & Fabrications

  • Ring Man Units industry

    Ring Man Units

  • Railways industry

    Railways

  • Gasket Industry industry

    Gasket Industry

  • Pharmaceuticals Industry industry

    Pharmaceuticals Industry