HowStainlessSteelFlanges AreManufactured
Step-by-StepIndustrialManufacturingProcess
FromRawMaterialtoFinishedFlange
Precision•Strength•QualityControl
UnderstandingStainlessSteelFlanges
•Mechanicalcomponentusedtoconnectpipes, valves,pumps,andequipment
•Ensuresleak-proofpipelinejoints
•Commoninoil&gas,petrochemical,powerplants, watertreatment
•ManufacturedasperASME,ANSI,DIN,ENstandards
Step1:SelectingtheRawMaterial
• High-quality stainless steel billets or round bars
• Common grades: 304, 304L, 316, 316L, Duplex
• Chemical composition verification
• Spectro testing to confirm material grade
• Traceability maintained with heat numbers
Step2:CuttingtoRequiredSize
Billets cut into measured lengths
Bandsaw or power hacksaw machines used
Precise dimension control
Prepared for forging process
Step3:HeatingtheMaterial
• Heated in induction or gas furnace
• Temperature: 1100°C – 1250°C
• Achieves plastic deformation state
• Uniform heating is critical
• Prevents internal cracks
Step4:ForgingProcess
• Hot metal placed in forging press
• Open die or closed die forging
• High pressure shapes the flange
• Improves grain structure
• Enhances mechanical strength
Step5:Trimming&HeatTreatment
• Excess material removed
• Flash trimming for uniform shape
• Solution annealing process
• Rapid cooling (water or air quench)
• Enhances corrosion resistance
Step6:PrecisionMachining
• CNC lathe operations
• Facing and beveling
• Bore machining
• Drilling bolt holes
• Creating raised face (RF) or ring type joint (RTJ)
Step7:SurfaceTreatment
• Shot blasting for surface cleaning
• Polishing (if required)
• Anti-rust oil coating
• Pickling & passivation
• Improves surface finish and corrosion resistance
Step8:QualityInspection
• Dimensional inspection
• PMI testing
• Ultrasonic testing (UT)
• Hydrostatic testing
• Hardness testing
• Third-party inspection (if required)
Step9:Marking&Identification
Each flange is marked with:
• Grade
• Size
• Pressure class
• Heat number
• Manufacturer logo
• Standard specification
Step10:Packing&Shipment
• Protective wrapping
• Wooden crates or pallets
• Export-grade packaging
• Documentation: MTC, test reports
• Ready for domestic & international dispatch
BuiltforPerformance&Reliability
High Strength
Corrosion Resistance
Leak-Proof Performance
Long Service Life
Suitable for High Pressure & Temperature
