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A weld neck flange (also known as a high-hub flange and tapered hub flange) is a type of flange. There are two designs. The regular type is used with pipes. The long type is unsuitable for pipes and is used in process plant. A weld neck flange consists of a circular fitting with a protruding rim around the circumference. Generally machined from a forging, these flanges are typically butt welded to a pipe. The rim has a series of drilled holes that permit the flange to be affixed to another flange with bolts.
Weld Neck Flange Specification:
Size |
1/2" (15 NB) to 88" (2200NB) |
Class |
PN6,10,16,25,40,63,100,160 |
Flange Face Type |
Type A(Flat Face), Type B(Raised Face),Type D(Groove) |
Surface Treatment |
Antirust Paint, Oil Black Paint, Yellow Transparent, Hot Dip Galvanized |
Materal |
Stainless Steel, Alloy Steel, Carbon Steel |
Manufacturing process |
Cutting, Heat treatment, Die Forging/Free Forging, CNC Machining |
Manufacturing Standards |
EN1092-1 |
Material Grades:
Stainless Steel |
A 182 F 304, 304L, 304H, 316, 316L, 316Ti, 321, 321H, 347, 347H |
Carbon Steel |
A 105, A 350 LF 2,P250GH,P265GH,P280GH |
Alloy Steel |
ASTM / ASME A 182, ASTM / ASME F5, F9, F11,F22, F 91 |
Weld Neck Flanges
in three types of paintings:
♦ Anti-Rust Oil Painting
♦ Yellow Golden Painting
♦ Black Painting
Full Specification for Weld Neck Flange:
1. International Standards:EN1092-1
2. Material Specification:
A 182 F 304, 304L, 304H, 316, 316L, 316Ti, 321, 321H, 347, 347H
A 105, A 350 LF 2,P250GH,P265GH,P280GH
ASTM / ASME A 182, ASTM / ASME F5, F9, F11,F22, F 91
3. Pressure Ratings:
PN2.5, PN6, PN10, PN16, PN25, PN40, PN63, PN100, PN160
4. Size Range:
1/2" ~ 88" (DN15 ~ DN2200)
Used in: Oil & Gas, Offshore, Water, Ship, Power, Pipe Projects etc.
http://www.goldenoceanflanges.com/