| Customization: | Available |
|---|---|
| Standard: | ANSI, DIN, GB, JIS, GOST, BSW |
| Type: | Welding Flange |
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| ANSI/ASME B16.5/JIS 10K F321/F316 DN150 pipe fitting Forged large diameter 24inch RF FF RTJ Stainless Steel Wn LWN PL Flange for adaptor joint shelf bracket | |
| Type | Plate flange ,Lap Joint Flange ,Threaded flange, Socket Welding Flange, Blind Flange, Slip on Flange . |
| Technics | Forged,Cast,welding,etc |
| Size | 1/2"-120"(DN15-DN3000) |
| Pressure | 150psi-2500psi(0.6Mpa-42 Mpa) |
| Standred | ANSI B16.5/ANSI B16.47/API 605 MSS SP44,AWWA C207-2007/ANSI B16.48 DIN2527-2367 JIS B2220/B2203/B2238/G3451 BS4504 EN1092 |
| Material | Carbon steel: Q235A, Q235B,Q345BC22.8, ASTM A105, SS400 |
| Alloy steel: N04400/400,N06625/625,N08825/825,N10276/C276,800/800H,600/600H | |
| Stainless steel: 310/F304/304L/F316/F316L, F321, F347. | |
| Surface treatment | polish,sand blasting ,sand rolling,annealing etc |
| Application Fields | Chemical Industry /Petroleum Industry /Power Industry/Metallurgical Industry Building Industry /Ship-building Industry |
| Packing | plywood cases, pallets, nylon bags or according to the customers' requirements |
| Sealing Face | FF RF MF FM T/G RJ |
| Origin | Wenzhou,CHINA |
| HS Code | 73072100 |
| Certificate | ISO , CCS,LR ABS UR etc |
A weld neck flange, also called a tapered hub flange or high-hub flange, is a kind of flange that can relocate stress to the pipes, ensuring a decrease in high-stress concentration at the bottom of the flange. There are two welding neck flanges designs -the first type is used with wipes while the second, longer type cannot be used with pipes but with a process plant. The weld neck flange comprises of a round fitting that extends beyond the rim of the circumference. These flanges, typically manufactured from forging, are actually welded to pipes.
Characteristics of welding neck flanges:
These flanges are distinguished by having a long conical neck, the end of which is welded to the connecting pipe. The inside diameter of the pipe is equal to that of the flange, providing a conduit of generally constant cross-section and no interruptions or turbulence in the gases/liquids flowing through the pipe. Welding neck flanges provide high load strength along with even stress distribution.
Attention must be paid to the junction between the flange and the pipe to be welded on in order to avoid possible interruptions in high speed flows.
Why use a welding neck flange?
WN flanges are intended for activities involving high pressure and extreme conditions (cold or heat), flammable or corrosive contents, etc., and, above all, environments where leakage must be minimal or almost non-existent. They are used in order to minimize the number of welds on small parts while helping to reduce corrosion of the junction itself.
When comparing these different types of stainless pipe flanges, several factors must be considered to determine which flange type is most appropriate for a given application:
Weld Neck Flanges offer superior performance under high pressure and temperature conditions compared to Slip-On or Threaded Flanges. If your application involves extreme conditions, Weld Neck Flanges are generally recommended due to their robust design and ability to distribute stress evenly across the connection.
Slip-On Flanges are easier to install than Weld Neck Flanges because they do not require precise alignment during installation. Threaded Flanges offer even greater ease since no welding is required at all. Lap Joint Flanges provide flexibility during installation but require a stub end for proper use.
Lap Joint Flanges are particularly advantageous in applications requiring frequent disassembly or inspection because they allow easy removal without cutting or damaging the pipe or flange itself.
Cost is another important factor when choosing a flange type. Slip-On Flanges tend to be more cost-effective than Weld Neck Flanges due to their simpler design and easier installation process. However, if long-term durability under extreme conditions is required, Weld Neck Flanges might offer better value despite their higher initial cost.
They are used in steam lines; oil, natural gas and refined hydrocarbon lines; fire networks; petrochemical facilities, etc.
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