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Marine & Offshore Equipment Datasheet
Product Datasheet

ANSI B16-5 Flange

Welding Neck Flange

Manufacturers of steel flanges follow ansi b16.5 standards when designing or machining a flange. A long weld neck flange, or LWN,is considered a specialty flange because of its protruding neck.The neck extends from the f...

ISO9001 Supplier Class Certificate Export Supply
Welding Neck Flange

Key Highlights

Category
ANSI B16-5 Flange
Standard
DIN
Material
Carbon steel
Weight / Size
Nominal pipe size Outside Diam O.D.
Certificate
ABS, LR, BV, DNVGL, NK, KR, IRS, RMRS, CCS
We can supply according to your requirement, drawings, class certificate needs, and delivery schedule.

Technical Specifications

Category
ANSI B16-5 Flange
Model / SKU
Welding-Neck-Flange
Standard
DIN
Material
Carbon steel
Weight / Size
Nominal pipe size Outside Diam O.D.
Surface
A long weld neck flange, or LWN,is considered a specialty flange because of its protruding neck.The neck extends from the flat surface of the flange and receives and guides the pipe into place— the neck serves as an extension of the boring.Tapering the neck provides extra reinforcement for use in high-pressure or extreme and fluctuating temperature applications.
Certificate
ABS, LR, BV, DNVGL, NK, KR, IRS, RMRS, CCS
Warranty
12 Months unless specified otherwise
Origin
China

China Welding Neck Flange:

Manufacturers of steel flanges follow ansi b16.5 standards when designing or machining a flange. A long weld neck flange, or LWN,is considered a specialty flange because of its protruding neck.The neck extends from the flat surface of the flange and receives and guides the pipe into place— the neck serves as an extension of the boring.Tapering the neck provides extra reinforcement for use in high-pressure or extreme and fluctuating temperature applications.

Weld Neck Flanges are designed to be joined to a piping system by butt welding.Weld Neck Flanges are preferred for high stresses to the pipe, reducing stress applications. The neck, or hub, transmits stress concentration at the base of the flange. The gradual transition of thickness from the base of the hub to the wall thickness at the butt weld provides important reinforcement of the flange.

Specification:

Nominal pipe size Outside Diam O.D. of Raised Face at Base of Hub Thickness BORE LENGTH THRU HUB Diam of Hub at Bevel Radius of Fillet Thread Length
Welding Neck Socket Welding Welding Neck
D G X t B1 T1 A R Q
1/2 89 35.1 30.2 11.2 15.7 47.8 21.3 3.0 15.7
3/4 99 42.9 38.1 12.7 20.8 52.3 26.7 3.0 15.7
1 108 50.8 49.3 14.2 26.7 55.6 33.5 3.0 17.5
11/4 117 63.5 58.7 15.7 35.1 57.2 42.2 4.8 20.6
11/2 127 73.2 65.0 17.5 40.9 62.0 48.3 6.4 22.4
2 152 91.9 77.7 19.1 52.6 63.5 60.5 7.9 25.4
21/2 178 104.6 90.4 22.4 62.7 69.9 73.2 7.9 28.4
3 191 127.0 108.0 23.9 78.0 69.9 88.9 9.7 30.2
31/2 216 139.7 122.2 23.9 90.2 71.4 101.6 9.7 31.8
4 229 157.2 134.9 23.9 102.4 76.2 114.3 11.2 33.3
5 254 185.7 163.6 23.9 128.3 88.9 141.2 11.2 36.6
6 279 215.9 192.0 25.4 154.2 88.9 168.4 12.7 39.6
8 343 269.7 246.1 28.4 202.7 101.6 219.2 12.7 44.5
10 406 323.9 304.8 30.2 254.5 101.6 273.1 12.7 49.3
12 483 381.0 365.3 31.8 304.8 114.3 323.9 12.7 55.6
14 533 412.8 400.1 35.1 336.6 127.0 355.6 12.7 57.2
16 597 469.9 457.2 36.6 387.1 127.0 406.4 12.7 63.5
18 635 533.4 505.0 39.6 438.2 139.7 457.2 12.7 68.3
20 699 584.2 558.8 42.9 489.0 144.5 508.0 12.7 73.2
24 813 692.2 663.4 47.8 590.6 152.4 609.6 12.7 82.6