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Product & Supply Range of Long Weld Neck Flange：
1. Long Weld Neck Flange Size: 1/2"-60"(DN10-DN1500)
2. Long Weld Neck Flange Material:
Carbon steel: ASTM A105/SA105N; ASTM A350 LF1; LF2; CL1/CL2, CT20;16MN;RST37.2;S235JR;P245GH;P250GH;P250GHM; C22.8;Q235;15CrMo
Stainless steel: ASTM A182, SS303; SS304/304L; SS316/316L; F321; F347; 316Ti; A182F317/317L; SS400;SF440
Alloy Steel:ASTM A182 A182 F12,F11,F22,F5,F9,F91,F51,F53,F55,F60,F44,F304H,F316H,F317H,F321H,F347H,INCONEL 600,625,825,etc.
3. Long Weld Neck Flange Wall Thickness: Sch5, Sch10, Sch20 , Sch30, STD, Sch40, XS,Sch80, Sch100, Sch120, Sch140, XXS, Sch160;
4. Long Weld Neck Flange Pressure Rating:
ANSI B16.5: Class 150 Flanges-Class 2500 Flanges；
DIN: 6Bar 10Bar 16Bar 25Bar 40Bar 63Bar
JIS: 5K Flanges-30K Flanges
EN1092-1: 6Bar 10Bar 16Bar 25Bar 40Bar 63Bar 100Bar
5. Long Weld Neck Flange Surface treatment: Anti-rust oil, black / yellow / transparent / electric galvanized / hot galvanized.
(1) ANSI B16.5, A105 150LB / 300LB / 600LB / 900LB / 1500LB / 2500LB
(2) DIN 2573 PN6 / DIN 2576 PN10 / DIN2502 PN16 / DIN2503 P25-40 / DIN2566 PN16 / DIN2631-2635 RST37.2 OR C22.8
(3) JIS SS400 OR SF440 5K / 10K / 16K / 20K / 30K
(4) UNI 2276 / 2277 / 2278 / 6084 / 6089 / 6090 / 2544 / 2282 / 6091-6093
(5) EN1092 PN6 / PN10 / PN16 / PN25 / PN40 / TYPE1 TYPE2 TYPE 5 TYPE 12 TYPE 13
(6) BS4504 SANI1123 1000/3, 1600/3, 2500/3, T/D, T/E, T/F carbon steel flange
(7) AS2129 TABLE D / TABLE H / TABLE E carbon steel flange
(8) GOST 12820-80 / 12821-80 carbon steel flange
ASME/ANSI/EN/DIN/BS Long Weld Neck Flange
Eathu specializes in manufacturing the best quality long weld neck flange in varieties of specifications, grades, materials and sizes. We sell long weld neck flange to our customers in various industries such as chemical, oil mills, petrochemical, mining, refineries, construction, fertilizers, shipbuilding, power plant, steel plant, nuclear power, offshore, oil & gas, defense, paper, breweries, railway, cement, and engineering.
A Integral Flange which is also called Long weld neck flange (LWN flange), is used for high pressure situations, integral hub weld neck flanges are used and for very high pressure cases Long Welding Neck flanges are preferred. In this case, the weld are far from the ring to avoid bending stresses and weld stress being combined.
It is required when an extended neck is required. It acts as a boring extension. It is used in chemical and petroleum industries and used in residential and commercial buildings. It performs well where there is level of stress and temperature fluctuate. Long weld neck flanges are built in a variety of lengths, size and dimensions according to the need of the customers. Many factories make long neck flanges by welding the steel pipe inside the neck of the flange, so the quality of the long neck flanges made is very poor (easy to cause safety accidents), but the price is cheap.
Download the PDF Technical Drawing from "Price List and Technical"
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