Plate flanges are one of the simplest in structure and most cost-effective flange types in piping systems. They are directly machined from circular steel plates, have no hub transition, and are connected to pipes through fillet welding. The nickel alloy plate flanges supplied by Hefei Tailan Metal Co., Ltd. are manufactured from high-quality nickel-based alloy plates through multiple precision processes including cutting, solution heat treatment, machining, drilling, and pickling/polishing. Featuring simple structure, economical cost, convenient processing, and excellent corrosion resistance, they are specifically designed for low pressure, non-critical service conditions, or large diameter pipe connections.
Application Notes:
- Plate flanges are typically used for low pressure, ambient temperature, non-critical service conditions
- Suitable for non-aggressive media such as water, air, inert gases
- Not recommended for high temperature, high pressure, severe cyclic loading, or toxic media applications
Supply Range
Nominal Diameter (DN/NPS): DN15 – DN600 (1/2 inch – 24 inches); Larger diameters up to DN3000 negotiable
Pressure Class: Class 150 (ASME); PN 6, PN 10, PN 16, PN 25 (EN)
Facing Type: Raised Face (RF), Flat Face (FF)
Bore Diameter (B): 2-4mm larger than pipe OD for easy slipping
Plate Thickness (T): Determined by pressure class and standard requirements
Machining Precision: Sealing surface roughness Ra 3.2μm – 6.3μm (as per standard requirements)
Surface Condition: Machined, Pickled, Polished optional
Dimensional and Appearance Inspection
Overall Dimensions: Measuring all critical dimensions using calipers, micrometers, tape measures
Bore Diameter: Measuring bore size ensuring pipe matching
Sealing Surface: Inspecting flatness, roughness, no scratches
Bolt Holes: Inspecting hole diameter, bolt circle, hole position
Plate Flatness: Inspecting overall flange flatness
Non-Destructive Testing
Penetrant Testing (PT): 100% inspection of sealing surface and critical areas
Ultrasonic Thickness Measurement: Verifying flange thickness uniformity
Marking and Traceability
Each flange has a unique identification, traceable to plate batch and production records.
Third-Party Inspection Support
We welcome clients to designate international Third-Party inspection agencies for pre-shipment inspection, with shipment only after passing inspection.
