Large Diameter Flange Fabrication Service CE Certified Export Quality

Large Diameter Flange Fabrication Services

For industrial pipeline projects requiring oversized and custom flanges, professional fabrication services ensure precise dimensions, reliable performance, and international certification compliance.

Custom Size Flange Capabilities

Our manufacturing facility specializes in large diameter flange fabrication for industrial pipeline applications:

Size Range

• Standard sizes: DN15 to DN600 (NPS 1/2 to 24)
• Large diameter: DN650 to DN4000 (26 to 160 inches)
• Maximum weight: Up to 5 tons per piece
• Thickness: Up to 200mm

Manufacturing Process

1. Material selection and inspection
2. Plate cutting and beveling
3. Rolling and forming
4. Welding and assembly
5. Heat treatment
6. Machining and finishing
7. Quality inspection and testing

Flange with CE Certification for Export

European market requires CE marking and PED compliance for pressure equipment:

Certification Package

• CE Marking: Compliance with PED 2014/68/EU
• Notified Body: TUV, BV, SGS certification
• Material Certificates: EN 10204 3.1 MTR
• Pressure Testing: Hydrostatic test reports
• Technical File: Complete documentation
• Declaration of Conformity: EU compliance statement

Export Standards

• ASME B16.5 / B16.47 (Americas)
• EN 1092-1 (Europe)
• GB/T 9115 (China)
• JIS B2220 (Japan)
• GOST (Russia/CIS)

Flange with Drilling Service for Oil and Gas

Custom drilling patterns ensure perfect compatibility with existing pipeline infrastructure:

Drilling Capabilities

• CNC drilling machines for precision
• Standard bolt patterns (ASME, EN, JIS, GB)
• Custom drilling per client drawings
• Oversized holes for field adjustment
• Tapped holes for special applications
• Counterboring for flush bolts

Oil and Gas Applications

• Wellhead equipment
• Pipeline manifolds
• Refinery process piping
• Offshore platforms
• LNG terminals

High Pressure Alloy Steel Flange Exporter

Specialized in high-pressure alloy flanges for extreme conditions:

Alloy Materials

Grade	Composition	Max Temp
F11	1.25Cr-0.5Mo	550°C
F22	2.25Cr-1Mo	580°C
F91	9Cr-1Mo-V-Nb	620°C
F5	5Cr-0.5Mo	600°C
F9	9Cr-1Mo	650°C

Pressure Classes

• Class 600: Up to 110 bar working pressure
• Class 900: Up to 165 bar
• Class 1500: Up to 276 bar
• Class 2500: Up to 460 bar

Quality Control and Testing

Inspection Procedures

• Dimensional inspection (CMM)
• Visual testing (VT)
• Magnetic particle testing (MT)
• Liquid penetrant testing (PT)
• Ultrasonic testing (UT)
• Radiographic testing (RT)
• Test di durezza
• Impact testing (Charpy V-notch)

Documentation

• Material test reports (MTR)
• Tabelle di trattamento termico
• Non-destructive testing reports
• Dimensional inspection reports
• Pressure test certificates
• Third-party inspection reports

Packaging and Shipping

• Wooden crates for ocean freight
• Protective coating on sealing faces
• Bolt hole protectors
• Clear marking and labeling
• Container loading optimization

Lead Time and Capacity

• Standard flanges: 7-15 days
• Large diameter: 20-30 days
• Custom alloy: 30-45 days
• Monthly capacity: 500+ tons

Songhai Flange provides large diameter flange fabrication services with CE certification for global export. Contact us for custom drilling, alloy materials, and competitive pricing.