Manufacturing and Inspection Process
Checks follow the process below. Electroslag remelting and decarburization are done only when the order requires them.
Inspection at each step
Checks follow the process below. Items marked as order-only are not performed on every flange.
Incoming material
Incoming inspection
- Appearance
- Material certificate review
- Chemical analysis on a sample
- Electroslag remelting if required
Cutting
Billet inspection
- Weight
- Dimensions
- Soundness
Heating
Forging
Rough inspection
- Quantity
- Appearance
- Dimensions
- Weight
- Metallographic examination on a sample
Heat treatment
Heat-treatment inspection
- Temperature control
- Time control
- Heat-treatment curve
- Mechanical test on a sample
- Decarburization if required
Machining
Machining inspection
- Appearance
- Dimensions
- Magnetic particle or penetrant testing
- Ultrasonic testing
Marking and cleaning
Final inspection (in-house or third party)
- Quantity
- Appearance
- Dimensions
- Surface finish and gasket-face serration roughness
- Review of test reports
- Marking
- Packing
Packing and shipment