Company Introduction
Mcneil Instruments is a trusted name in the global steel and metal industry, delivering premium-quality products and customized solutions to meet diverse industrial needs. With a strong presence in the UAE and across international markets, we specialize in manufacturing and supplying stainless steel pipes, tubes, flanges, fasteners, and other high-performance metal products.
Our commitment to quality, innovation, and customer satisfaction sets us apart. Backed by years of industry expertise, we adhere to international standards and ensure precision engineering in every product we deliver. At Mcneil Steel & Alloys FZE, we aim to build long-lasting relationships with clients by providing reliable, durable, and cost-effective solutions for industries such as oil & gas, construction, marine, and petrochemicals.
What is Groove & Tongue Flanges?
Groove and Tongue Flanges, also known as Tongue and Groove (T&G) flanges, are a type of flange connection where one flange has a raised ring (the tongue) and the matching flange has a corresponding depression (the groove). This design ensures proper alignment and provides a tight, leak-proof seal when bolted together. The tongue fits into the groove, creating a joint that offers better positioning and gasket containment, making it ideal for high-pressure and high-temperature applications.
Key Features of Groove & Tongue Flanges:
- Precise Alignment: Tongue and groove faces help maintain perfect alignment between flanges.
- Leak-Proof Joint: The interlocking design ensures a secure, tight seal to prevent leakage.
- Gasket Containment: The groove confines the gasket, preventing it from being blown out.
- Reusable Design: Flanges can be separated and reused with minimal damage, unlike weld joints.
- Pressure Resistance: Suitable for systems operating under high pressure and temperature.
- Versatility: Available in various materials and pressure ratings.
Common Uses of Groove & Tongue Flanges:
- Petrochemical and Chemical Plants: For reliable sealing in corrosive and high-pressure environments.
- Steam and Gas Lines: Suitable for high-temperature and high-pressure steam services.
- Power Generation: Used in thermal and nuclear plants for safe and durable connections.
- Offshore and Marine Applications: Effective in extreme environmental conditions.
- Pipeline Systems: Ensures tight sealing in fluid and gas transportation systems.
Flanges Specifications & Standards
| Size Range | ½” to 48” (DN15 to DN1200) |
|---|---|
| Pressure Ratings | Class 150, 300, 600, 900, 1500, 2500 |
| Types | Weld Neck, Slip-On, Blind, Threaded, Socket Weld, Lap Joint, Long Weld Neck, Spectacle Blind, Orifice, Ring Type Joint, etc. |
| Face Types | Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ), Large Male & Female, Tongue & Groove |
| Material Grades | Stainless Steel (304, 316, 321, 347), Carbon Steel (A105, A350 LF2), Alloy Steel (F11, F22), Duplex, Super Duplex, Inconel, Monel, Hastelloy |
| Flange Thickness | As per ASME B16.5, B16.47, EN1092-1 or client requirement |
| Drilling Templates | ANSI/ASME, BS, DIN, EN, JIS, GOST, etc. |
| Surface Finish | Stock finish (125–250 AARH), Spiral serrated, Smooth finish, or as specified |
| Testing | PMI, UT, RT, Hydro Test, Visual & Dimensional Inspection |
| Coating (if any) | Black Paint, Anti-Rust Oil, Galvanized, FBE, or Custom |
| ASME B16.5 | Pipe Flanges and Flanged Fittings (½” to 24”) |
|---|---|
| ASME B16.47 | Large Diameter Steel Flanges (26” to 60”) – Series A & B |
| ASME B16.36 | Orifice Flanges |
| ASME B16.48 | Line Blanks (Spectacle Blinds, Spades & Spacers) |
| EN 1092-1 | European Standard for Circular Flanges (PN6 to PN100) |
| BS 4504 | British Standard Flanges for Pipes, Valves & Fittings |
| DIN 2633 / 2576 | German Industrial Standard Flanges |
| JIS B2220 | Japanese Standard Flanges |
| GOST 12820/12821 | Russian Flange Standards |
| MSS SP-44 | Steel Pipe Line Flanges for High-Pressure Transmission Services |
| API 605 | Former Standard for Large Diameter Flanges (merged into ASME B16.47 Series B) |
| Standards | ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc |
|---|---|
| Dimensions | ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc |
| Sizes | 1/2″ (15 NB) to 48″ (1200NB) |
| Class/Pressure | 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc |
| Flange Face Type | Flat Face (FF), Raised Face (RF), Ring Type Joint (RTJ) |
| Forms | Slip on flanges, Socket weld flanges, Forged flanges, Blind flanges, Welding neck flange, Ring type joint flange, Spectacle blind flange, Reducing flange, Threaded / Screwed flange, Tongue and Groove flange, Long weld neck flange, Plate flange, ASME B16.5 flange |
| Range | 15 NB UP TO 600 NB IN 150 LBS , 300 LBS, 400 LBS , 600 LBS , 900 LBS , 1500 LBS , 2500 LBS / TABLE 2.5 , TABLE 6 , TABLE 10, TABLE 16,TABLE 25 , TABLE 40, TABLE 64, TABLE 160, TABLE 320, TABLE 400 |
|---|---|
| Form | Slip On , Socket Weld , Blind , Lapped , Screwed , Weld Neck , Reducing , Spectacle ,Slip On Boss , Plate , Plate Blank , Screwed Boss. |
| Stainless Steel | ASTM / ASME SA 182 F 304 , 304L , 304H, 309H, 310H , 316 , 316H , 316L , 316 LN , 317 , 317L , 321 , 321H , 347H |
| Duplex Steel | ASTM / ASME SA 182 F 44 , F 45 , F51 , F 53 , F 55 , F 60 , F 61 |
| Range | Same as Stainless |
|---|---|
| Form | Same as Stainless |
| Carbon Steel | ASTM / ASME A 105 , ASTM / ASME A 350 LF 2 |
| Alloy Steel | ASTM / ASME A 182 GR F 5, F 9 , F 11 , F 12 , F 22 , F 91 |
| Range | Same as Stainless |
|---|---|
| Form | Same as Stainless |
| Nickel Alloy | ASTM / ASME SB 564 UNS 2200, 4400, 8825, 6600, 6601, 6625, 10276 etc |
| Copper Alloy | ASTM / ASME SB 61, SB 62, SB 151, SB 152 (various UNS/CU-NI grades) |
| Grades | Hastelloy C-22, C-276, C-2000 |
|---|---|
| Size | 1/2″NB to 12″NB |
| Standard | ASTM, ASME, API, AISI, BS, ANSI, DIN, JIS, MSSP, NACE |
| Types | Socket Weld, Slip On, Blind, Lapped, Screwed, Weld Neck, Long Weld Neck, Reducing, Spectacle, Ring Joint |
| Features | Durability, Corrosion resistance, Dimensional accuracy, High strength, Excellent finish |
| Grades | Inconel 600, 601, 625, 625LCF, 686, 718, 800, 825, X-750 |
|---|---|
| Size | 1/2 inch – 48 inch (15mm – 1200mm) |
| Standard | ANSI/ASME B16.5, ANSI B16.47 API, DIN, JIS, BS |
| Types | Same as Hastelloy |
| Features | Same as Hastelloy |
| Grades | Incoloy 800, 825, 925, A-286, DS |
|---|---|
| Flanges Grade | ASTM A 182 F 304/L; 316/L; 317/L; 309; 310; 321; 347; 904L |
| Type | SORF, BLRF, WNRF, SOLJ |
| Class | 50 To 3000 |
| Range | DN15 to DN1800 in multiple pressure classes |
| Features | Same as Inconel |
| Grades | Monel 400, Monel K500 |
|---|---|
| Range | 1/2″ NB to 60″ NB |
| Types | Same as above |
| Features | Durability, Corrosion resistance, Dimensional accuracy, High strength, Chemical resistance, Excellent finish |
| Material | Titanium |
|---|---|
| Grade | Gr2, Gr5, Gr7, Gr9 |
| Standards | DIN, ASTM, BS |
| Application | Bicycles, Motors, Chemicals |
| Strengths | Superior Quality, Fast delivery, Competitive pricing, Humanized after-sales |
| Features | Low density, Rustless, Good antiwear, High strength |
| Size | As per customer requirements |
Most Selling Types Of Flanges
Weld Neck Flange
Slip-On Flange
Blind Flange
Threaded Flange
Socket Weld Flange
Lap Joint Flange
Long Weld Neck Flange
Expander Flange
Orifice Flange
Spade and Ring Spacer Flange
Spectacle Blind Flange
High Hub Flange
Flat Flange
Loose Flange
Ring Type Joint Flange
SORF Flange
BLRF Flange
Groove & Tongue Flange
Fasteners Types
Bolt Manufacturer
Nut Manufacturer
Screw Manufacturer
Washers Manufacturer
Stud Bolts Manufacturer
Ring Fasteners Manufacturer
Coated Fasteners Manufacturer
Custom Fasteners Manufacturer
