Industrial Flanges Manufacturer & Supplier in India

ASME B16.5 Industrial Flanges: Dimensions | Specifications | Material Grade | Standards | About Industrial Flange | All Product Types

Nutech Overseas is a leading manufacturer and supplier of industrial flanges in India, delivering precision-engineered piping components for critical industries including oil & gas, petrochemical, power generation, marine, and infrastructure sectors. Headquartered in Mumbai, we serve clients across all major industrial hubs including Delhi, Chennai, Bangalore, Hyderabad, Pune, Ahmedabad, Kolkata, Surat, and Visakhapatnam. Our flanges are manufactured in strict accordance with globally recognized standards such as ASME, ASTM, and ANSI, ensuring consistent quality, dimensional accuracy, and high performance in demanding industrial environments.

Product Overview

Industrial flanges are essential mechanical components used to connect pipes, valves, pumps, and other equipment within a piping system. These connections must maintain structural integrity under extreme pressure and temperature conditions while allowing easy maintenance and inspection. In India's rapidly expanding industrial ecosystem, flanges are indispensable for maintaining safety, efficiency, and reliability across sectors such as refineries, chemical processing plants, LNG terminals, and heavy engineering industries. Our manufacturing capabilities cover a wide range of flange sizes from ½ inch to 60 inches, with pressure ratings ranging from Class 150 to Class 2500. Each product is engineered with precision machining and strict quality control processes to meet both domestic and international project requirements.

Types of Flanges We Supply

We manufacture and supply a comprehensive range of industrial flanges including: - Industrial Flanges (SO / SORF / SOFF) - Weld Neck Flanges (WN) - Blind Flanges (BL) - Socket Weld Flanges (SW) - Threaded Flanges (TH) - Ring Type Joint Flanges (RTJ) - Lap Joint Flanges (LJ) - Spectacle Blind Flanges - Spacer & Spade Flanges - Custom CNC Machined Flanges Each flange type is designed for specific industrial applications. For example, Weld Neck flanges are ideal for high-pressure and high-temperature systems due to their stress distribution design, while Industrial Flanges are widely used in low-pressure systems for ease of installation and cost efficiency.

Industrial Applications in India

Industrial flanges are extensively used across India in major industrial regions including Mumbai, Navi Mumbai, Thane, Delhi NCR, Noida, Gurugram, Chennai, Bangalore, Hyderabad, Pune, Ahmedabad, Surat, Vadodara, Kolkata, Visakhapatnam, Coimbatore, Jaipur, Nagpur, Indore, Bhopal, Ludhiana, Kanpur, Ranchi, Bhubaneswar, and Kochi. These flanges are critical components in: - Oil & Gas Refineries (ONGC, Reliance, IOCL) - Petrochemical Plants - Power Generation Units - Offshore & Marine Engineering - Water Treatment & Desalination Plants - Steel Plants and Heavy Industries - EPC and Infrastructure Projects Their ability to withstand high pressure, temperature fluctuations, and corrosive environments makes them essential for safe and efficient industrial operations.

Materials and Specifications

We manufacture industrial flanges using a wide range of materials to suit different applications: Carbon Steel: ASTM A105, A105N, A350 LF2, A516 GR.60/70 Stainless Steel: ASTM A182 F304, F304L, F316, F316L, F321, F347, 904L Alloy Steel: ASTM A182 F1, F5, F9, F11, F22, F91 Duplex & Super Duplex Steel: ASTM A182 F51, F53, F55, F60 Nickel Alloys: Inconel 600/625, Monel 400/K500, Hastelloy C22/C276, Alloy 20 Copper Nickel: 90/10, 70/30 These materials provide superior mechanical strength, corrosion resistance, and long service life in harsh industrial conditions. TECHNICAL SPECIFICATIONS: Our industrial flanges are manufactured according to internationally recognized standards: - ASME B16.5 (Pipe Flanges and Flanged Fittings) - ASME B16.47 Series A & B (Large Diameter Flanges) - ASME B16.36 (Orifice Flanges) - ASME B16.48 (Line Blanks) - ANSI B16.5 - EN 1092-1 - DIN Standards - ISO 7005 Key Technical Parameters: - Size Range: ½" to 60" (DN15 to DN1500) - Pressure Ratings: Class 150 to Class 2500 - Face Types: RF (Raised Face), FF (Flat Face), RTJ - Surface Finish: Serrated, Smooth, Spiral Finish - Coating: Anti-rust oil, black paint, galvanization - Testing: PMI, UT, Hydrostatic, Visual Inspection - Certification: EN 10204 3.1 / 3.2, ISO, PED These specifications ensure compatibility with global piping systems and compliance with project-specific engineering requirements.

International Standards

We strictly adhere to global engineering standards governed by organizations such as: - ASME – American Society of Mechanical Engineers - ASTM – American Society for Testing and Materials - ANSI – American National Standards Institute Compliance with these standards ensures our products meet international safety, quality, and performance benchmarks.

Export strictly to India

Nutech Overseas is a globally recognized exporter of industrial flanges from India. We supply products to key markets including the Middle East, USA, Europe, Southeast Asia, and Africa. Our export services include complete documentation such as mill test certificates (MTC), third-party inspection reports, and compliance certifications, ensuring smooth project execution. CITIES: We serve all major industrial cities and regions in India including Mumbai, Delhi, Chennai, Bangalore, Hyderabad, Pune, Ahmedabad, Surat, Kolkata, Visakhapatnam, Coimbatore, Vadodara, Jaipur, Nagpur, Indore, Bhopal, Ludhiana, Kanpur, Ranchi, Bhubaneswar, Kochi, and other emerging industrial hubs.

Manufacturing Excellence in India

As a proudly Indian manufacturer, Nutech Overseas operates state-of-the-art forging and machining facilities equipped with modern CNC machines, automated production lines, and rigorous quality control systems. Our manufacturing infrastructure enables us to produce industrial flanges in large volumes while maintaining exceptional dimensional accuracy and surface finish. We specialize in both standard and custom flanges, catering to the diverse needs of India's booming industrial sector.

Serving India's Key Industrial Corridors

Our flanges are supplied to major industrial corridors across India, including the Delhi-Mumbai Industrial Corridor (DMIC), Chennai-Bangalore Industrial Corridor (CBIC), and Vizag-Chennai Industrial Corridor (VCIC). We serve leading EPC contractors, public sector undertakings like ONGC, IOCL, BPCL, GAIL, NTPC, and private sector giants including Reliance Industries, Adani Group, Tata Group, and L&T. Our proximity to India's largest ports ensures rapid dispatch and cost-effective logistics.

Quality Assurance and Certifications

Every flange manufactured by Nutech Overseas undergoes stringent quality checks including raw material inspection with spectrometer analysis, dimensional verification using Coordinate Measuring Machines (CMM), hydrostatic pressure testing, ultrasonic testing (UT), magnetic particle inspection (MPI), and positive material identification (PMI). Our quality management system is ISO 9001:2015 certified, and we comply with PED 2014/68/EU for European projects. All products are supplied with EN 10204 Type 3.1/3.2 mill test certificates for full traceability.

Custom Solutions and Technical Support

Beyond standard ASME and DIN flanges, we offer custom-engineered solutions including non-standard flange dimensions, special alloy compositions, and project-specific surface treatments. Our in-house engineering team works closely with clients to optimize flange selection based on operating conditions, media compatibility, and budget requirements. Whether you need a single prototype or a bulk order of thousands, Nutech Overseas delivers with precision and reliability.

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.

Industrial Flanges Available in Class 150 / 300 / 600 – Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ) – Sizes ½″ to 48″