Long Neck Welding(Lwn)

Long Weld Neck Flanges

SIZES: ½” to 60”
CLASS: 150 to 2500
TYPE: Long Weld Neck (LWN) – Straight & Heavy Barrel Types
SCHEDULE: S10, S20, S30, S40, S STD, S60, S XS, S80, S100, S120, S140, S160, S XXS
STANDARD: ASME B16.5

MATERIAL GRADES:

  • Nickel Alloys: Incoloy (800, 800H, 800HT, 825), Inconel (600, 625), Monel 400
  • Specialty Alloys: Alloy 20, Hastelloy (C22, C276), Copper nickel (Cu-Ni), Titanium (Gr. 1, 2, 3), Urea Grade
  • Duplex & Super Duplex: F51, F53, F55, F44
  • Stainless Steel: AISI 304, 316, 321, 347
  • Alloy Steel: AISI Gr.1, Gr.5, Gr.9, Gr.11, Gr.22, Gr.91
  • Carbon Steel: ASTM A105, A350 LF2, A516 Gr.70, A694 F60–F65

Hunter Steel Flanges offers precision-engineered Long Weld Neck Flanges (LWN) designed for high-pressure, high-temperature applications requiring seamless flow and enhanced reinforcement. These flanges are ideal for critical process piping systems, pressure vessels, and heat exchangers. Available in a wide range of sizes, pressure classes, and material grades, our LWN flanges meet stringent international standards and can be customized for straight or heavy barrel configurations based on client specifications.

 

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Quality Department

Hunter Steel Flanges Manufacturing LLC. is certified under ISO 9001:2015, ISO 14001:2015, OHSAS 18001 / ISO 45001. Also, all of our products are compliance with the requirements of ANSI/ASME, API, JIS, AWWA, DIN, BS and special requests.