Male & Female Flanges

M/F Face Flanges Suppliers

Male & Female Flanges Suppliers

ASME B16.5 Male & Female Flanges: Dimensions | Specifications | Material Grade | Standards | About M/F Face Flange | All Product Types

Nutech Overseas is a leading manufacturer and exporter of precision-engineered Male & Female Flanges, designed to ensure secure sealing and alignment in high-pressure and high-temperature pipeline systems. These flanges feature a raised male face and a matching recessed female face, providing a natural centering mechanism that ensures tight fitment and enhanced leak protection without requiring excessive bolt load.

We offer both small and large Male Female Flanges, tailored to suit various pipeline diameters and pressure classes, from Class 150 to Class 2500 (PN6 to PN400). Our M/F face flanges are widely used in process piping, pressure vessels, water treatment plants, petrochemical refineries, and offshore installations — particularly where thermal expansion and vibration resistance are critical.

In addition to standard weld neck and slip-on configurations, we also manufacture Male and Female Threaded Flanges, suitable for low-pressure and non-welded connections. All our flanges are forged as per international norms including ASME B16.5, ASME B16.47 Series A/B, EN 1092-1, and MSS-SP-44, ensuring dimensional accuracy, mechanical strength, and corrosion resistance.

Available in carbon steel, stainless steel, duplex, super duplex, and high-nickel alloys, our MF flanges undergo advanced forging, machining, and testing processes to meet the highest quality expectations. Each flange is tested for flatness, face finish, and alignment to ensure it is compatible with gaskets such as ring-type joints, spiral wound, and flat sheet types.

With a strong export presence across the USA, UAE, Saudi Arabia, Europe, and Southeast Asia, Nutech Overseas is trusted globally for providing high-performance forged Male & Female Flanges with timely delivery and full traceability.

Small and Large Male & Female Flanges – Forged M/F Face Connections for Leak-Free Sealing, Axial Alignment & High-Pressure Integrity

For complete technical details, including dimensions, pressure rating classes, weight charts, sizes, tolerances, and material specifications of our ANSI B16.5 Male & Female Threaded Flanges, please download the full Catalog PDF below.

Industrial Applications of Male & Female Threaded Flanges in ANSI/ASME Class 150–2500 Systems for Hydrocarbon, Steam & Offshore Piping

Technical Specifications of Male & Female Flanges

Specification Details
Type Male & Female Flange (M/F Face), Threaded M/F Flange, Small & Large Face Variants
Design Standard ASME B16.5, ASME B16.47 Series A/B, EN 1092-1, MSS-SP-44, ISO 7005, BS 4504
Size Range ½″ NB to 60″ NB (DN15 to DN1500)
Pressure Ratings Class 150, 300, 600, 900, 1500, 2500 (PN6 to PN400)
Face Type Male Face (raised portion ~6.4 mm), Female Face (recess ~5.1 mm), Flat Face, RTJ
Facing Dimensions Machined to match ASME B16.5 tolerances ensuring precise gasket seating and face fit
Threaded Option Available as Male and Female Threaded Flanges for specific maintenance or pressure applications
Axial Alignment & Sealing Male and Female faces ensure concentric alignment and reduce gasket movement under bolt load
Surface Finish Spiral Serrated (125–250 AARH), Smooth Face, Concentric Serrated, as per sealing requirement
Drilling Compatibility Conforms to standard flange drilling templates for easy mating with other ASME/EN flanges
End Connections Supplied with Weld Neck, Slip-On, or Threaded ends as per system design
Testing & Inspection Hydrostatic Test, PMI, UT/MPI, Dimensional Check, Face Tolerance Verification, Visual QC
Certification EN 10204 Type 3.1 / 3.2, IBR Approval, ISO 9001, PED 2014/68/EU, NACE MR0175 / ISO 15156, ISO 9001
Application Industries Oil & Gas, Chemical Processing, Marine Systems, High-Pressure Steam Lines, Refinery, Offshore Structures
Origin Made in India (by Nutech Overseas)
Export Network USA, Europe, and Middle East

Complete Material Grade Chart - Class 150 Male & Female Flange

Material Category Male & Female Flange Grades
Stainless Steel Male & Female Flange 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 Male & Female Flange ASTM A182 F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61, UNS S31803 / S32205
Super Duplex Steel Male & Female Flange ASTM A182 F53 / F55 / F57 / F59 / F60 / F61, UNS S32750 / S32760
Carbon Steel Male & Female Flange 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 Male & Female Flange ASTM A182 F5 / F9 / F11 / F12 / F22 / F91, AISI 4130 / 4140
Nickel Alloy Male & Female Flange Nickel 200 / 201, ASTM B564
Monel Male & Female Flange Monel 400 (UNS N04400), Monel K500 (UNS N05500), ASTM B564
Inconel Male & Female Flange Inconel 600 / 601 / 625 / 690 / 718 / 783 / X750, ASTM B564
Incoloy Male & Female Flange Incoloy 800 / 800H / 800HT (UNS N08800), Incoloy 825 (UNS N08825), Incoloy 925, ASTM B564
Hastelloy Male & Female Flange Hastelloy C276 (UNS N10276), C22 (UNS N06022), C4, C2000, B2, B3, X, ASTM B564
Alloy 20 Male & Female Flange Alloy 20 / 20Cb-3, Carpenter® 20, ASTM B462
254 SMO Male & Female Flange SMO 254 / 6Mo, UNS S31254, DIN 1.4547, ASTM A182
Copper Nickel Male & Female Flange Copper Nickel 90/10 (C70600), 70/30 (C71500), UNS C71640, ASTM B61 / B62 / B151 / B152
Copper Male & Female Flange TP1, TP2, T1, T2, C10100–C12300, C14200–C17200, C21000–C71520, including C10930, C11000, C11400, C12000, C12200, C26000, C28000, C33000, C44300, C70600, etc.
Brass Male & Female Flange Grades 3602, 2604, H59, H62, etc.
Aluminium Male & Female Flange Aluminium Grades 5052, 6061, 6063, 2017, 7075, etc.
Titanium Male & Female Flange 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

International Flange Standards We Manufacture & Supply

What is the main difference between Male & Female flanges and other flange facing types?

The key distinction lies in the mating surface design:

  • Male & Female flanges (M/F) feature a raised male face (protruding) and a matching recessed female face.
  • This design ensures:
    • Precise alignment between flanges
    • Controlled gasket positioning
    • Reduced risk of gasket blowout under high pressure
  • Unlike Raised Face (RF) or Flat Face (FF) flanges which offer a single-plane contact, M/F flanges rely on face interlocking for enhanced sealing performance.

Such features make them highly reliable in high-pressure, vibration-sensitive, and hazardous media applications like steam systems, chemical plants, and subsea pipelines.

Where are Male & Female flanges commonly used in industrial piping systems?

Male & Female flanges are used in applications that demand tight sealing, precise face-to-face alignment, and enhanced pressure retention. You’ll commonly find them in:

  1. Steam lines – where controlled gasket compression is critical
  2. Heat exchangers and reactors – for high-temperature fluid sealing
  3. Subsea oil & gas pipelines – to prevent gasket displacement in high-pressure conditions
  4. Chemical processing plants – especially in aggressive media handling
  5. Hydraulic and pneumatic systems – for ensuring axial force sealing
  6. Vacuum systems – where leakage control is essential

Their machined mating surfaces make them ideal for installations where repeatability and long-term integrity are essential.

Are Male & Female flanges compatible with standard Raised Face or Flat Face flanges?

No, Male & Female flanges are not directly compatible with Raised Face (RF) or Flat Face (FF) flanges due to their distinctive mating surface profiles:

  • Male & Female Flanges must be installed as a matched pair — one with a male face (protruding) and one with a female face (recessed).
  • Mixing M/F with RF or FF flanges can lead to:
    • Improper sealing
    • Gasket misalignment
    • Potential leakage or face damage
  • To maintain system integrity:
    • Always use M/F flange sets together.
    • Ensure the gasket type fits snugly into the female recess (e.g., metal jacketed or ring-type gaskets).

These flanges follow tight tolerances, so using matched counterparts is crucial for safe and reliable operations.

Can Male & Female flanges be reused after disassembly?

Yes, Male & Female (M/F) flanges can be reused, but only after careful inspection and proper handling, since their precision-machined faces are critical for sealing. Here's what must be considered before reusing:

Conditions for Safe Reuse:

  1. No visible damage to the male (raised) or female (recessed) face — even small nicks or scratches can compromise sealing.
  2. No signs of warping or deformation caused by over-tightening, thermal cycling, or misalignment.
  3. Proper cleaning of contact surfaces to remove old gasket residues without using abrasive tools that could scratch the flange face.
  4. Flatness verification with appropriate gauges — a warped flange cannot ensure correct gasket compression.
  5. Correct gasket selection for reuse — avoid using gaskets that have already been compressed or degraded.

Important Note:

While Raised Face (RF) flanges offer a bit more flexibility in reuse, Male & Female flanges depend heavily on the integrity of their interlocking faces, making them more sensitive to:

  • Mechanical damage
  • Improper storage
  • Field mishandling
What type of gaskets are used with Male & Female (M/F) flanges?

Gasket selection is critical when working with Male & Female flanges, as the sealing surfaces are machined to match each other precisely. Unlike Raised Face (RF) or Flat Face (FF) flanges, M/F designs require gaskets that fit into the female recess and align with the male projection for secure sealing.

Common Gasket Types Used:

  • Metal Jacketed Gaskets – ideal for high-temperature and high-pressure applications; fits securely in the female recess.
  • Spiral Wound Gaskets (with Inner & Outer Rings) – used when precise compression and recovery are required.
  • Ring-Type Gaskets – preferred in critical systems with high integrity sealing requirements.
  • Compressed Fiber or PTFE Gaskets – suitable for non-aggressive media or low-pressure installations.
Which countries does Nutech Overseas export Male & Female flanges to?

At Nutech Overseas, we are proud to be a trusted global exporter of high-quality Male & Female flanges. Our forged flange products are engineered to meet stringent international standards and are shipped to key markets across the world.

Export Destinations Include:

  • United States – Supplying to oil & gas, refineries, and marine sectors
  • Saudi Arabia & UAE – Serving petrochemical and desalination industries
  • Germany & Other EU Nations – Meeting EN & DIN standard requirements
  • Singapore & Southeast Asia – Supporting chemical and offshore plants
  • Canada – Delivering for energy and pipeline infrastructure projects
  • Africa, South Korea, Oman, Qatar, and more

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