A weld neck flange is a type of steel flange designed to transfer stresses to the pipe to reduce high stress concentrations at the base of the flange.Compared with other types,weld neck flanges are know for their tapered hub and gentle transition from flange thickness to pipe wall thickness.They are deformation-resistant,and are normally used for high pressure,high or low temperature conditions.
| Weld Neck Flanges | ||
| Material | Carbon steel | ASTM A105. ASTM A350 LF1. LF2, CL1/CL2, A234, S235JRG2, P245GH,Q235 |
| P250GH, P280GHM 16MN, 20MN ,20# | ||
| Stainless steel | ASTM A182, F304/304L, F316/316L | |
| Alloy steel | ASTM A182 A182 F12,F11,F22,F5,F9,F91etc. | |
| Standard | ANSI | Class 150 Flanges-Class 2500 Flanges |
| DIN | 6Bar 10Bar 16Bar 25Bar 40Bar | |
| JIS | 5K Flanges-20K Flanges | |
| UNI | 6Bar 10Bar 16Bar 25Bar 40Bar | |
| EN | 6Bar 10Bar 16Bar 25Bar 40Bar | |
| GB | 6Bar10Bar16Bar25Bar40Bar | |
| SABS | T1000/3 T1600/3 T2500/3 T4000/3 | |
| TYPE | 1.Welding neck Flange 2.Slip on | |
| 3.Blind flange 4.Long welding neck flange | ||
| 5.Lap joint flange 6.Socket welding | ||
| 7.Threaded flange 8.Flat flange | ||
| Surface | Anti-rust oil, clear lacquer, Black lacquer, Yellow lacquer,hot-dipped Galvanized,electrical galvanized | |
| Connection | Welding, Threaded | |
| Technical | Forged, Casting | |
| Size | DN10-DN3600 | |
| Package |
1.>Standard export packaging (Plywood Case Of Outside,Plastic Cloth Of Inside). 2:As Customers' Requirements |
|
| Heat Treatment | Normalizing, Annealing, Quenching Tempering | |
| Applications | Water works, Shipbuilding industry, Petrochemical & Gas industry, Power industry, Valve industry,and general pipes connecting projects etc. |
|
Common outer diameters: 1/2”, 2”, 3”, 4”, 6”, 8”, 10”, 12” to 24”.
Special made outer diameters: up to 60”.
Class range: Class 150, 300, 400, 600, 900, 1500, 2500(# or LB). PN 2.5 to PN 250.
Flange face type: RF (Raised Face), RTJ (Ring Type Joint)
Standards for WN flanges:
ASTM B16.5 for carbon steel welding neck flanges.
ASTM B16.5 for alloy and stainless welding neck flange. (Alloy for F11, F22, stainless for F304/F304L, F316/F316L)
ASME B16.5
ASME B16.47
Prior to ordering the weld neck flange,need to confirm the material standard, outer diameter, pressure class, face type and thickness schedule.
If you have any questions about ASTM B16.5 Carbon Steel Weld Neck Flange please send us an email:[email protected]
