Threaded Flange has its inner bore surface designed as tubular thread,which matches with threaded pipe to achieve connection.Therefore,no welding is required.Compared with slip-on welding or welding neck flanges.it featured easier installation and more convenient maintenance. The flange can be applied in situations where welding is forbidden.When it comes to alloy steel flange,which has enough strength but poor welding performance.users can choose threaded flange as well.To avoid leakage,it is not recommended for pipeline involving dramatic temperature change and occasions with temperature lower than-45℃ or higher than 260℃.
GB/T9112-2000 GB/T9114-2000 GB/T9124-2000
ASME B 16.5-2009
AFNOR NF E29-200-1-2007
Alloy steel:A182F 1-F 2-F 5-F 9-F 10-F 91-F 92-F 122-F 911-F 11-F 12-F 21-F 22
Stainless steel:A182 304-304H-304L-304N-304LN 316-316H-316L-316LN 321-321H 347-347H
Low-temperature steel:A522 A707 Grade L 1-L 2-L 3-L 4-L 5-L 6-L 7-L 8
High-performance steel:A694 F 42-F 46-F 48-F 50-F 52-F 56-F 60-F 65-F 70F
American System:CLASS150 CLASS300 CLASS400 CLASS600 CLASS900 CLASS1500 CLASS2500
Flat Face(FF) Raised Face (RF)
Cutting of Raw Material-Die Forging-Machining
The flange is widely used in many areas such as power generation plant, petroleum industry,natural gas system,chemical industry,shipbuilding industry,heating system,paper-making industry,metallurgy industry,etc.