Long Neck Welding (abbreviated LWN) flanges are similar to a standard Welding Neck flange, but the "Neck" is considerably longer. This type is often used as a nozzle for a barrel or column. In addition, there are the type LWN Heavy Barrel (HB) and the Equal LWN Barrel (E); they have a different shape and a thicker "Wall".

Stainless Steel ASTM A 182, A 240
Grade F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H,904L, Duplex stainless steel UNS S31803, 2205, Super Duplex stainless steel UNS S32750
Carbon Steel ASTM A 105, ASTM A 181
Alloy Steel ASTM A 182, GR F1, F11, F22, F5, F9, F91
Nickel Alloys Monel 400 & 500, Inconel 600 & 625, Incolloy 800, 825, Hastelloy C22,C276
Copper Alloys Copper, Brass & Gunmetal
Size 1/8" NB TO 72"NB.
Class 150#, 300#,400 #,600#,900#, 1500# & 2500 #.
Standard ANSI ANSI B16.5, ANSI B16.47, MSS SP44, ANSI B16.36, ANSI B16.48
DIN DIN2527, DIN2566, DIN2573, DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628, DIN2629, DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636, DIN2637, DIN2638, DIN2673
B.S BS4504 , BS4504, BS1560, BS10
UNI, JIS & GOST

UNI 2276~2284, 2253, 2254; JIS B2220; GOST 12820-80