ASME B16.5 Nipo Flange Manufacturer
ASME B16.5 Nipoflange: Dimensions | Specifications | Material Grade | Standards | About Nipo Flange | All Product Types
Nutech Overseas is a trusted manufacturer and global supplier of high-quality Nipoflanges, designed for critical piping connections where branch lines are required to be connected at a 90° angle from the run pipe. These flanges are a combination of a welding outlet (nipple) and a flange, commonly used in high-pressure and high-temperature applications across industries.
The Nipoflange simplifies the process of connecting a branch pipe to a header by integrating the functionality of a weld neck flange and a weld-o-let fitting. This results in reduced welding time, minimal misalignment, and enhanced structural integrity.
Manufactured from forged materials, our Nipoflanges comply with international standards such as ASME B16.5, and are available in raised face (RF) or ring-type joint (RTJ) designs. The flange end is typically bolted to the mating pipe flange, while the nipple end is welded directly to the branch pipe.
We offer Standard and Reducing Nipoflanges in sizes from ½″ NB to 12″ NB, and pressure ratings from Class 150 to 2500 / PN10 to PN400. These are precisely machined to ensure leak-free, strong, and compact pipe jointing solutions — making them ideal for power plants, oil & gas facilities, petrochemical refineries, offshore platforms, and pressure vessel piping.
Our Nipoflanges are available in various configurations including:
Every piece is inspected for dimensional accuracy, surface finish, and pressure capability — with optional testing and documentation per EN 10204 Type 3.1 / 3.2, NACE MR0175, and PED 2014/68/EU.
As an export-focused company, we deliver Nipoflanges tailored to engineering drawings, MTOs, and global project specifications with competitive pricing and fast turnaround — serving customers across UAE, Saudi Arabia, South Africa, Germany, USA, and Southeast Asia.
For complete technical details, including dimensions, pressure rating classes, weight charts, sizes, tolerances, and material specifications of our ANSI B16.5 Nipo Flanges, please download the full Catalog PDF below.
Specification | Details |
---|---|
Type | Nipoflange (Nipple + Flange combination), Available in Standard and Reducing Bore |
Design Standard | ASME B16.5, B16.25, MSS-SP-97 (Reference), Custom Designs Available |
Size Range | ½″ NB to 12″ NB (DN15 to DN300) – Custom sizes on request |
Pressure Ratings | Class 150, 300, 600, 900, 1500, 2500 / PN10 to PN400 |
Connection Type | Butt Weld (BW) or Socket Weld (SW) at the nipple end, Flanged at the mating end |
Face Type | Raised Face (RF), Ring Type Joint (RTJ), Flat Face |
Drilling Options | Standard and Custom Drilled Flange Holes as per mating specifications |
Surface Finish | Spiral Serrated, Smooth Finish, Stock Finish (Ra 3.2 – 6.3 μm) |
Testing & Inspection | Hydro Test, Dimensional Check, PMI, NDT (UT, MPI), Visual Inspection |
Certifications | EN 10204 Type 3.1 / 3.2, NACE MR0175, ISO 9001:2015, PED 2014/68/EU, IBR (if required) |
Application Industries | Oil & Gas, Refining, Petrochemical, Power Generation, Water Treatment, Food & Beverage, Fire Protection Systems, Pulp & Paper, Shipbuilding, Process Piping, Pressure Vessels, HVAC, Offshore Rigs |
Origin | Made in India (by Nutech Overseas) |
Export Network | USA, Europe, and Middle East |
Material Category | Nipo Flange Grades |
---|---|
Stainless Steel Nipoflange | ASTM A182 F304 / F304L / F304H, F316 / F316L / F316Ti, F310, F309S, F317 / F317L, F321 / F321H, F347 / F347H, F904L, ASTM A351 CF3 / CF3M / CF8 / CF8M / CF8C, DIN 1.4301, 1.4306, 1.4307, 1.4311, 1.4401, 1.4404, 1.4408, 1.4409, 1.4541, 1.4571, 1.4550, 1.4435, 1.4539 |
Duplex Steel Nipoflange | ASTM A182 F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61, UNS S31803 / S32205 |
Super Duplex Steel Nipoflange | ASTM A182 F53 / F55 / F57 / F59 / F60 / F61, UNS S32750 / S32760 |
Carbon Steel Nipoflange | ASTM A105 / A105N, ASTM A350 LF2, ASTM A694 F52 / F56 / F60 / F65 / F70 / F80, ASTM A216 WCB, DIN 1.0460 / 1.0402 / 1.0619, Die Steel, Mild Steel |
Alloy Steel Nipoflange | ASTM A182 F5 / F9 / F11 / F12 / F22 / F91, AISI 4130 / 4140 |
Nickel Alloy Nipoflange | Nickel 200 / 201, ASTM B564 |
Monel Nipoflange | Monel 400 (UNS N04400), Monel K500 (UNS N05500), ASTM B564 |
Inconel Nipoflange | Inconel 600 / 601 / 625 / 690 / 718 / 783 / X750, ASTM B564 |
Incoloy Nipoflange | Incoloy 800 / 800H / 800HT (UNS N08800), Incoloy 825 (UNS N08825), Incoloy 925, ASTM B564 |
Hastelloy Nipoflange | Hastelloy C276 (UNS N10276), C22 (UNS N06022), C4, C2000, B2, B3, X, ASTM B564 |
Alloy 20 Nipoflange | Alloy 20 / 20Cb-3, Carpenter® 20, ASTM B462 |
254 SMO Nipoflange | SMO 254 / 6Mo, UNS S31254, DIN 1.4547, ASTM A182 |
Copper Nickel Nipoflange | Copper Nickel 90/10 (C70600), 70/30 (C71500), UNS C71640, ASTM B61 / B62 / B151 / B152 |
Copper Nipoflange | TP1, TP2, T1, T2, C10100–C12300, C14200–C17200, C21000–C71520, including C10930, C11000, C11400, C12000, C12200, C26000, C28000, C33000, C44300, C70600, etc. |
Brass Nipoflange | Grades 3602, 2604, H59, H62, etc. |
Aluminium Nipoflange | Aluminium Grades 5052, 6061, 6063, 2017, 7075, etc. |
Titanium Nipoflange | ASTM B381 Gr.1 / Gr.2 / Gr.4 / Gr.5 / Gr.7, UNS R50250 / R50400 / R50550 / R50700 / R52400 / R53400 / R56320 / R56400 |
Other Special Grades | Al6XN, Tin Bronze, Aluminium Bronze, Lead Bronze, Nimonic 75 / 80A / 90 |
The primary difference lies in design integration, welding requirements, and space optimization:
Nipoflange:
Weldolet + Flange Combination:
Nipoflanges offer superior structural reliability and reduced weld fatigue, which is why they're preferred in critical process industries, offshore installations, and nuclear or high-vibration systems.
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:
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:
Socket Weld Nipoflange:
Additional Considerations:
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:
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:
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.