Original
By certification 
Long neck flange is also called long diameter flange, belongs to the American standard flange standard system, is a form of ANSI flange, is a neck butt welding flange expansion form. Flange neck slightly straight tube, the neck height of 229MM or 305MM, flange neck does not need to be processed, according to customer requirements customized beveling. Long neck flanges are frequently used in CLASS series pipe flanges. When small size flanges or pipe flanges below DN50 are combined with pipe body, using long neck flanges can avoid the difficulty of welding caused by the thickness of flange neck wall.
The advantages of long neck flange: the neck height is higher than that of ordinary butt welding flange, so that the stiffness and bearing capacity of the flange are greatly improved. Site site installation is convenient, can omit some processes, such as: weld is easier to handle, can omit weld flaw detection process, in recent years, the use of a rising trend.
Size |
1/2" (15 NB) to 24" |
Class |
150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS |
Flange Face Type |
Flat Face(FF), Raised Face(RF) |
Surface Treatment |
Antirust Paint, Oil Black Paint, Yellow Transparent, Zinc Plated |
Materal |
Stainless Steel, Alloy Steel, Low temperature Steel, Carbon Steel, l |
Manufacturing process |
Cutting, Heat treatment, Die Forging/Free Forging, CNC Machining |
Manufacturing Standards |
ANSI B16.5 Custom Drawings |
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,A694F42,F52,F56,F60,F65,F70 |
Alloy Steel |
A 182, ASTM / ASME F5, F9, F11,F22, F 91,F1 |
●Packing: No Fumigate or Fumigate Plywood/Wood Pallet or Case
●Usage: Oil Field, Offshore, Water System, Shipbuilding, Natural Gas, Electric Power, Pipe Projects etc.
http://www.goldenoceanflange.com/
