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 a Flange?
A flange is a mechanical component used to connect pipes, valves, pumps, and other equipment in a piping system. It provides a reliable way to join sections together, allowing for easy assembly, disassembly, inspection, and maintenance. Flanges are typically bolted together with a gasket in between to create a tight, leak-proof seal. They come in various shapes, sizes, and materials to suit different industrial requirements, such as high pressure, high temperature, or corrosive environments.
Key Features of Flanges
- Strong Connection: Provides a secure and stable link between piping components.
- Ease of Assembly & Disassembly: Allows quick installation, removal, or replacement without cutting pipes.
- Leak-Proof Sealing: Designed to work with gaskets for tight and reliable sealing.
- Versatile Designs: Available in different types such as weld neck, slip-on, blind, threaded, and lap joint.
- Material Options: Manufactured in stainless steel, carbon steel, alloy steel, and other materials for various applications.
- Standard Compliance: Produced according to standards like ASME, ANSI, DIN, and BS to ensure compatibility.
Common Uses of Flanges
- Connecting Pipes and Equipment – To link sections of pipes or attach pipes to valves, pumps, or machinery.
- Maintenance Access – Allows parts of the piping system to be opened for inspection or repair.
- Pressure Vessel Connections – Used in boilers, heat exchangers, and storage tanks.
- High-Pressure Applications – Suitable for oil, gas, and petrochemical industries.
- Process Piping Systems – Found in chemical plants, power stations, and water treatment facilities.
- Marine and Offshore Systems – Ideal for shipbuilding and offshore oil rigs due to durability and corrosion resistance.
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, Socket weld, Forged, Blind, Welding neck, Ring type joint, Spectacle blind, Reducing, Threaded, Tongue & Groove, Long weld neck, 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