Long Weld Neck Flanges

We are a trusted manufacturer and exporter of Long Weld Neck (LWN) Flanges designed according to ASME B16.5 and ASME B16.47 standards.

Dimensions – ASME B16.5 Long Weld Neck Flanges

Long weld neck flange dimensions generally follow ASME B16.5 (½” to 24”) standards for pressure classes:

Class Ratings: 150, 300, 400, 600, 900, 1500, and 2500 LB

Nominal Pipe Sizes (NPS): ½” to 24” (larger sizes available in ASME B16.47)

Facing Types: Raised Face (RF), Ring Type Joint (RTJ), Flat Face (FF on request)