Nipoflange Suppliers

Specifying a Nipoflange correctly in a piping design, isometric drawing, or material take-off (MTO) is crucial for procurement and installation accuracy. Here’s how you typically define it:

A complete Nipoflange specification should include:

1. Size of Branch Pipe (NB/DN): e.g., 2″ NB or DN50
2. Pressure Class / Rating: ASME Class 150 / 300 / 600 / 900 / 1500 / 2500
3. End Connection: Butt Weld (BW) or Socket Weld (SW)
4. Flange Facing: Raised Face (RF), Ring Type Joint (RTJ), or Flat Face (FF)
5. Bore Type: Standard Bore or Reducing Bore
6. Design Standard: Typically ASME B16.5 + B16.25 (welding ends)
7. Material Grade: E.g., ASTM A105, A182 F316L, A694 F65, etc.
8. Drilling Pattern: As per companion flange or project requirement
9. Special Requirements: Coating, NACE compliance, IBR marking, certification

Optional data includes item code, tag number, and weld map reference — useful for EPC contractors and large plant projects.

The welding method for a Nipoflange depends on the nipple-end design and the piping system requirements. Below are the common welding procedures:

Butt Weld Nipoflange:

• Used when the nipple end of the Nipoflange is beveled for butt welding
• Welded directly to the branch pipe with full penetration weld
• Requires skilled welders and proper root gap preparation
• Suitable for high-pressure and high-temperature applications
• Welding procedure per ASME Section IX

Socket Weld Nipoflange:

• Used when the flange has a socketed bore at the nipple end
• Pipe is inserted into the socket and then fillet welded
• Easier and faster to install than butt welds
• Suitable for small bore, moderate-pressure systems

Additional Considerations:

• Preheating may be required based on material (e.g., for high carbon steels)
• Post-Weld Heat Treatment (PWHT) may be specified for critical systems
• Weld joints must be inspected with NDT methods like UT, RT, or MPI depending on service

Always follow WPS (Welding Procedure Specification) and project-specific codes for installation to ensure leak-free, high-integrity connections.

Yes, Nipoflanges can be fully customized based on specific project needs, especially for systems where standard sizes, facing types, or connection details don't apply.

Common customization options include:

1. Non-standard branch sizes (e.g., 1½″ branch on 4″ header)
2. Custom pressure ratings beyond ASME classes (as per client requirement)
3. Modified flange drilling patterns to match legacy equipment
4. Unusual face finishes: like tongue & groove, smooth, or serrated faces with specific Ra
5. Extended hub or nipple lengths for insulation clearance or space constraints
6. Special coatings (epoxy, PTFE, hot-dip galvanized, etc.)
7. High-alloy or dissimilar material combinations

These customizations are common in industries such as offshore oil rigs, FPSOs, refineries, shipbuilding, and nuclear systems, where standard fittings won’t suffice.

We offers precision machining services and in-house QA/QC support to manufacture Nipoflanges exactly as per your drawings, datasheets, or 3D models.

Nutech Overseas is a reputed global exporter of Nipoflanges, catering to industrial clients, EPC contractors, and OEMs in over 20 countries. Our flanges are trusted for their dimensional precision, material integrity, and compliance with international standards like ASME B16.5, EN 10204, and PED.

Key export destinations include:

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

All Nipoflanges are shipped with full traceability documents, 3.1 / 3.2 certificates, and project-compliant packaging, ensuring smooth customs clearance and hassle-free installation.