T&G Flange Suppliers
ASME B16.5 Tongue & Groove Flanges: Dimensions | Specifications | Material Grade | Standards | About T&G Flange | All Product Types
Nutech Overseas stands as a trusted name among global Tongue & Groove Flanges suppliers, offering high-integrity forged T&G flanges that ensure superior sealing for high-pressure and high-temperature piping systems. These flanges consist of a matching pair—one with a raised tongue face and the other with a matching groove face—ensuring accurate gasket alignment and preventing lateral movement during installation.
Commonly used in pressure vessels, heat exchangers, chemical reactors, and critical fluid transport systems, Tongue & Groove flanges are ideal where reliable, leak-proof connections are essential. The design ensures that the gasket remains centralized, enabling consistent sealing and minimal maintenance over long-term operations.
We manufacture and export a complete range of small and large tongue and groove face flanges in accordance with ASME B16.5, ASME B16.47, MSS-SP-44, and EN 1092-1 standards. Available in Class 150 to Class 2500, and sizes ranging from ½″ NB to 60″ NB (DN15 to DN1500), our T&G flanges are supplied with Raised Face (RF), Groove Face, and Ring Type Joint (RTJ) facing options.
With strict quality control and international certifications like EN 10204 3.1/3.2, ISO 9001, PED, and NACE MR0175, Nutech ensures performance under the toughest industrial conditions. Whether used in oil & gas, power generation, petrochemical, marine, or offshore platforms, our Tongue & Groove flanges offer dimensional accuracy, corrosion resistance, and leak-free service life.
For complete technical details, including dimensions, pressure rating classes, weight charts, sizes, tolerances, and material specifications of our ANSI B16.5 Tongue and Groove Flanges, please download the full Catalog PDF below.
Specification | Details |
---|---|
Type | Tongue & Groove Flange (T&G), Large Tongue Groove, Small Tongue Groove |
Design Standard | ASME B16.5, ASME B16.47 Series A & B, DIN, EN 1092-1, 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 | Tongue Face (Male) and Groove Face (Female) – designed to mate as a sealing pair |
Flange Thickness | As per ASME / EN / DIN dimensional specifications |
Function | Designed to ensure accurate alignment and leak-proof sealing in high-pressure piping systems |
Surface Finish | Stock finish (3.2–6.3 μm), Smooth face, Spiral Serrated, Concentric Serrated |
Gasket Compatibility | Metal Gaskets, PTFE, Graphite, and Spiral Wound Gaskets for T&G faces |
Drilling Template | Complies with ANSI B16.5 / B16.47 and EN 1092-1 bolt-hole patterns |
Coating / Protection | Black Paint, Yellow Transparent Varnish, Anti-Rust Oil, Hot Dip Galvanized |
Testing & Inspection | Hydrostatic Test, PMI, Ultrasonic/Magnetic Particle Testing, Dimensional Check, Visual Inspection |
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, Power Plants, Offshore Drilling, Petrochemical, Refining, Water Treatment, Marine Engineering |
Origin | Made in India (by Nutech Overseas) |
Export Network | USA, Europe, and Middle East |
Material Category | T&G Flange Grades |
---|---|
Stainless Steel Tongue & Groove 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 Tongue & Groove Flange | ASTM A182 F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61, UNS S31803 / S32205 |
Super Duplex Steel Tongue & Groove Flange | ASTM A182 F53 / F55 / F57 / F59 / F60 / F61, UNS S32750 / S32760 |
Carbon Steel Tongue & Groove 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 Tongue & Groove Flange | ASTM A182 F5 / F9 / F11 / F12 / F22 / F91, AISI 4130 / 4140 |
Nickel Alloy Tongue & Groove Flange | Nickel 200 / 201, ASTM B564 |
Monel Tongue & Groove Flange | Monel 400 (UNS N04400), Monel K500 (UNS N05500), ASTM B564 |
Inconel Tongue & Groove Flange | Inconel 600 / 601 / 625 / 690 / 718 / 783 / X750, ASTM B564 |
Incoloy Tongue & Groove Flange | Incoloy 800 / 800H / 800HT (UNS N08800), Incoloy 825 (UNS N08825), Incoloy 925, ASTM B564 |
Hastelloy Tongue & Groove Flange | Hastelloy C276 (UNS N10276), C22 (UNS N06022), C4, C2000, B2, B3, X, ASTM B564 |
Alloy 20 Tongue & Groove Flange | Alloy 20 / 20Cb-3, Carpenter® 20, ASTM B462 |
254 SMO Tongue & Groove Flange | SMO 254 / 6Mo, UNS S31254, DIN 1.4547, ASTM A182 |
Copper Nickel Tongue & Groove Flange | Copper Nickel 90/10 (C70600), 70/30 (C71500), UNS C71640, ASTM B61 / B62 / B151 / B152 |
Copper Tongue & Groove Flange | TP1, TP2, T1, T2, C10100–C12300, C14200–C17200, C21000–C71520, including C10930, C11000, C11400, C12000, C12200, C26000, C28000, C33000, C44300, C70600, etc. |
Brass Tongue & Groove Flange | Grades 3602, 2604, H59, H62, etc. |
Aluminium Tongue & Groove Flange | Aluminium Grades 5052, 6061, 6063, 2017, 7075, etc. |
Titanium Tongue & Groove 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 |
Tongue and Groove Flanges (T&G Flanges) are a matched pair of flanges designed with a raised ring (tongue) on one flange and a matching depression (groove) on the other. When bolted together, the tongue fits perfectly into the groove, ensuring tight alignment and a strong seal.
Key Technical Features:
Where They Are Used:
This configuration ensures concentric alignment and offers superior sealing performance, especially in systems where leak prevention is critical.
It offers several engineering and operational advantages over standard flange face types, especially in applications requiring high sealing integrity and precise alignment.
Key Advantages:
T&G flanges are specifically chosen for critical applications where joint integrity and safety cannot be compromised.
These flanges are specifically designed to be used with gaskets that fit into the groove, providing a reliable and leak-proof seal, even in challenging environments.
Common Gasket Types:
Important Note:
Though often confused, Tongue & Groove (T&G) and Male & Female (M&F) flanges serve similar purposes but differ in their mating design and gasket positioning.
Key Differences:
Understanding this difference helps in selecting the correct flange for pressure handling, sealing integrity, and flange compatibility in any piping system.
Yes, Tongue & Groove Flanges are often preferred in systems where cyclic pressure, temperature fluctuations, or mechanical vibration is present — but their performance depends on specific design and installation factors.
Why T&G Flanges Perform Well in Such Environments:
Important Considerations:
T&G flanges are especially useful in applications like power generation, reciprocating pump stations, compressors, and offshore rigs — where durability under dynamic conditions is critical.
We are a trusted global supplier of Tongue & Groove Flanges, exporting to more than 40 countries across major industrial markets. Our flanges are used in a wide variety of sectors including oil & gas, petrochemicals, marine, offshore platforms, and energy infrastructure.
Key Export Destinations Include:
We support custom documentation, marking requirements, and export packaging in line with EN, ASME, and ISO standards, making us a reliable choice for international EPC contractors, OEMs, and stockists.
Our focus remains on quality, timely delivery, and global compliance, making Nutech a preferred name in forged flange exports worldwide.