ASME B16.5 Industrial Flanges: Dimensions | Specifications | Material Grade | Standards | About Industrial Flange | All Product Types
Nutech Overseas is a leading manufacturer and exporter of industrial flanges in Qatar, supplying high-quality piping components for LNG, oil & gas, petrochemical, and infrastructure projects. Our flanges are engineered in compliance with international standards such as ASME B16.5, ASME B16.47, EN 1092-1, DIN, and ISO, ensuring superior durability, corrosion resistance, and performance in demanding industrial environments. With a strong global export network and efficient logistics, we support contractors, EPC companies, and industrial clients across Qatar.
Industrial flanges are essential components used to connect pipes, valves, and equipment in piping systems. They provide a reliable and leak-proof connection that can withstand high pressure and temperature conditions. In large-scale industrial operations such as LNG plants and petrochemical facilities, flanges play a critical role in maintaining system integrity and operational efficiency. Our flanges are available in a wide range of sizes, pressure ratings, and materials to meet project-specific requirements.
We supply a complete range of industrial flanges including Industrial Flanges, Weld Neck Flanges, Blind Flanges, Socket Weld Flanges, Threaded Flanges, Ring Type Joint (RTJ) Flanges, Lap Joint Flanges, and Spectacle Blind Flanges. Each type is designed for specific applications, from low-pressure systems to high-pressure and high-temperature environments. Weld Neck flanges provide excellent stress distribution, while RTJ flanges are ideal for critical sealing applications.
In Qatar, industrial flanges are widely used in LNG production facilities, offshore oil platforms, gas processing plants, and pipeline networks. They are also essential in infrastructure and EPC projects, including desalination plants and power generation units. The ability of flanges to handle extreme conditions makes them indispensable for Qatar’s energy sector.
Our flanges are manufactured using premium materials such as Carbon Steel (ASTM A105, A350 LF2), Stainless Steel (F304, F316), Alloy Steel (F11, F22), Duplex and Super Duplex Steel, and nickel-based alloys like Inconel and Hastelloy. These materials ensure excellent mechanical strength and corrosion resistance.
All products are manufactured in accordance with ASME B16.5, ASME B16.47, EN 1092-1, DIN, ISO, and JIS standards, ensuring global compatibility and compliance.
We are a trusted exporter of industrial flanges to Qatar, providing complete documentation including mill test certificates, inspection reports, and quality certifications. Our logistics ensure timely delivery for large-scale projects.
Qatar is a global leader in Liquefied Natural Gas (LNG) production. To support this sector, we manufacture specialized cryogenic industrial flanges. These flanges, typically made from austenitic stainless steels (such as 304L and 316L) and specialized alloys, retain their toughness and ductility at extremely low temperatures (-196°C), preventing catastrophic brittle fracture in LNG processing and storage facilities.
In high-pressure gas applications common in Qatar, the integrity of the flange seal is paramount. We offer highly precise Ring Type Joint (RTJ) flanges that accommodate metallic ring gaskets. The machining of the deep grooves is done with microscopic precision to ensure a perfect metal-to-metal seal, capable of withstanding the immense pressures of gas extraction and transport pipelines.
We work closely with major Engineering, Procurement, and Construction (EPC) firms operating in Qatar. Beyond standard ASME flanges, we provide custom forged components and non-standard flange designs based on specific engineering drawings. This includes long weld neck flanges, heavy wall barrel flanges, and specialized transitional flanges required for complex pressure vessel nozzles and heat exchangers.
Aligning with Qatar's National Vision, we are committed to sustainable manufacturing practices. Our forging processes are optimized for energy efficiency, and all scrap metal is heavily recycled. Furthermore, our health, safety, and environmental (HSE) protocols ensure that our manufacturing exceeds international standards, minimizing our carbon footprint while producing the vital components needed for Qatar's infrastructure.
For complete technical details, including dimensions, pressure rating classes, weight charts, sizes, tolerances, and material specifications of our ANSI B16.5 Industrial Flanges, please download the full Catalog PDF below.
| Specification | Details |
|---|---|
| Type | Slip-On Flange (SO), Raised Face (SORF), Flat Face (SOFF), RTJ (Ring Type Joint) |
| Design Standard | ASME B16.5, ANSI B16.5, ASME B16.47 Series A & B, MSS-SP-44, BS 4504, EN 1092-1, DIN |
| Size Range | ½″ NB to 48″ NB (DN15 to DN1200) |
| Pressure Ratings | Class 150, 300, 600, 900, 1500, 2500 (PN6 to PN400 in EN standard) |
| Face Type | Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ) |
| Flange Thickness | As per ASME B16.5 / B16.47 or EN 1092-1 dimensional standards and pressure class |
| Bore & Hub Design | Slip-on design with pipe inserted before welding; beveled or smooth bore as per requirement |
| Welding Type | Fillet weld on both inner and outer side of pipe-to-flange connection |
| Surface Finish | Stock finish (3.2–6.3 μm), Smooth finish, Serrated concentric or spiral finish as per RF/FF |
| Gasket Compatibility | Spiral wound, Ring gaskets, Full face or raised face gaskets based on flange type |
| Drilling Template | Conforms to ANSI B16.5 or other applicable flange drilling standards |
| Coating / Protection | Rust preventive oil, Black paint, Yellow transparent varnish, Hot-dip galvanized (on request) |
| Dimensional Tolerances | As per ASME B16.5, EN 1092-1, MSS-SP-44 or client drawing/specifications |
| Testing & Inspection | Dimensional check, Hydrostatic test, PMI, Visual inspection, NDT (UT/MPI as required) |
| 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, Petrochemical, Power Generation, Water Treatment, Pulp & Paper, Shipbuilding, HVAC, Offshore |
| Origin | Made in India (by Nutech Overseas) |
| Export Network | USA, Europe, and Middle East |
| Material Category | Slip-On Flange Grades |
|---|---|
| Stainless Steel Slip-On 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 Slip-On Flange | ASTM A182 F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61, UNS S31803 / S32205 |
| Super Duplex Steel Slip-On Flange | ASTM A182 F53 / F55 / F57 / F59 / F60 / F61, UNS S32750 / S32760 |
| Carbon Steel Slip-On 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 Slip-On Flange | ASTM A182 F5 / F9 / F11 / F12 / F22 / F91, AISI 4130 / 4140 |
| Nickel Alloy Slip-On Flange | Nickel 200 / 201, ASTM B564 |
| Monel Slip-On Flange | Monel 400 (UNS N04400), Monel K500 (UNS N05500), ASTM B564 |
| Inconel Slip-On Flange | Inconel 600 / 601 / 625 / 690 / 718 / 783 / X750, ASTM B564 |
| Incoloy Slip-On Flange | Incoloy 800 / 800H / 800HT (UNS N08800), Incoloy 825 (UNS N08825), Incoloy 925, ASTM B564 |
| Hastelloy Slip-On Flange | Hastelloy C276 (UNS N10276), C22 (UNS N06022), C4, C2000, B2, B3, X, ASTM B564 |
| Alloy 20 Slip-On Flange | Alloy 20 / 20Cb-3, Carpenter® 20, ASTM B462 |
| 254 SMO Slip-On Flange | SMO 254 / 6Mo, UNS S31254, DIN 1.4547, ASTM A182 |
| Copper Nickel Slip-On Flange | Copper Nickel 90/10 (C70600), 70/30 (C71500), UNS C71640, ASTM B61 / B62 / B151 / B152 |
| Copper Slip-On Flange | TP1, TP2, T1, T2, C10100–C12300, C14200–C17200, C21000–C71520, including C10930, C11000, C11400, C12000, C12200, C26000, C28000, C33000, C44300, C70600, etc. |
| Brass Slip-On Flange | Grades 3602, 2604, H59, H62, etc. |
| Aluminium Slip-On Flange | Aluminium Grades 5052, 6061, 6063, 2017, 7075, etc. |
| Titanium Slip-On 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 |
Industrial flanges are piping components used to connect pipes, valves, and equipment, ensuring a strong and leak-proof joint.
Yes, we supply industrial flanges across Qatar with full export documentation and reliable delivery support.