Weldoflange Suppliers

Proper welding and installation of Weldoflanges is critical to ensure pressure integrity, alignment, and long-term performance of the branch connection.

Key Welding Guidelines:

1. Butt Weld End: The Weldoflange is beveled at the branch end to allow full penetration butt welding to the header pipe.
2. Pre-Welding Prep: Ensure proper root gap, alignment, and bevel match. Clean all mating surfaces to prevent contamination.
3. Welding Code Compliance: Follow WPS/PQR per ASME Section IX, with welders qualified under project specs.
4. Non-Destructive Testing (NDT): Use UT, RT, MPI, or DPI as per project quality plan to ensure weld integrity.
5. Post Weld Heat Treatment (PWHT): May be required for high-alloy or thick-wall materials to relieve stress.

Installation Notes:

• Ensure the Weldoflange face aligns properly with mating flange.
• Use correct gasket type (e.g., Spiral Wound or RTJ ring).
• Torque bolts per ASME PCC-1 to achieve uniform sealing.

These steps are critical in high-pressure environments like refineries, offshore rigs, and power plants where failure is not an option.

Weldoflanges are preferred in critical pipeline systems because they offer several mechanical and operational advantages over conventional fittings like weldolets + flanges or tees.

Key Advantages:

• Compact Design: Combines two components (weldolet and flange) into one, saving space and reducing system weight.
• Reduced Welding Time: Only one weld joint is needed, minimizing labor costs and reducing inspection complexity.
• Improved Structural Integrity: Integral forging means fewer stress concentration points and better fatigue resistance.
• Precise Alignment: Ensures perfect bore alignment between branch and header pipe, reducing turbulence and erosion.
• Leak-Proof Performance: Fewer joints = fewer potential leak paths, especially important in hazardous fluid service.
• Available in Reducing Type: Allows direct connection to smaller branch pipes without additional reducers.

Widely used in offshore platforms, petrochemical complexes, boiler systems, and FPSO vessels.

Yes, Weldoflanges can be fully customized to meet non-standard design requirements, especially in retrofit projects, offshore rigs, and modular systems where standard flanges won’t fit.

Common Customization Options:

1. Non-Standard Drilling Patterns:
   • Match legacy equipment or custom mating flanges
   • Modified bolt-hole diameter, pitch circle diameter (PCD), or number of holes
2. Offset Branch Angles:
   • 90° is standard, but 45°, 60°, or custom angles can be machined on request
3. Special Face Finishes:
   • Serrated finish per Ra requirement
   • Smooth face, spiral machined, or coated face (PTFE/Xylan)
4. Custom Hub or Neck Lengths:
   • Extended necks for insulation clearance or spool connection
   • Tapered transition for smooth fluid dynamics
5. Integration with Other Standards:
   • ASME B16.5 × DIN or EN standards in hybrid piping systems
   • Special pressure ratings above Class 2500 for critical zones

Nutech specializes in manufacturing project-specific Weldoflanges from client drawings, P&ID references, or reverse-engineered samples, with full material traceability and QC documentation.

Nutech Overseas is a global exporter of ASME B16.5 Weldoflanges, serving various industries including oil & gas, petrochemicals, shipbuilding, and power generation. With precision forging, strict quality control, and customizable options, our Weldoflanges are trusted in critical piping systems worldwide.

Major export destinations include:

• Middle East: United Arab Emirates (UAE), Saudi Arabia, Qatar, Oman, Kuwait, Bahrain
• Europe: Germany, Italy, Spain, Netherlands, Turkey
• Africa: South Africa, Egypt, Nigeria
• Asia-Pacific: Malaysia, Singapore, Indonesia, Philippines, Vietnam
• South Asia: Sri Lanka, Bangladesh
• Americas: United States (USA), Canada, Brazil

All Weldoflanges are supplied with EN 10204 3.1 / 3.2 certificates, NACE compliance, and custom packaging, with fast delivery via sea and air freight to meet project deadlines globally.