Name: Long Weld Neck Flange Manufacturer In India As Per Astm A105, Astm A350 Lf2 & Astm A182 F304, F304l, F316, F316l
Brand: New Era Pipes & Fittings
Availability: InStock
Rating: 5 (25 reviews)

Question 1

Where are Long Weld Neck Flanges typically used?

Accepted Answer

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.

Question 2

What materials are commonly used in Long Weld Neck Flange ?

Accepted Answer

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.

Question 3

What are Heavy Barrel Long Weld Neck Flanges?

Accepted Answer

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.