Welding Neck Flange Manufacturer
Best Welding Neck Flanges Manufacturer in India since 1971.
Table of Contents
Teshi Group: Leading Manufacturer, Stockist, Supplier, and Exporter of Welding Neck Flanges in India.
Teshi Group is a renowned leader in the manufacturing, stocking, supplying, and exporting of high-quality Welding Neck Flanges across India, with a growing footprint in international markets. Engineered to perfection, Teshi’s Welding Neck Flanges are designed for applications that require consistent strength and durability, offering enhanced performance under high-pressure conditions. These flanges are ideal for industries like oil and gas, petrochemical, power generation, and heavy engineering, where their ability to withstand extreme temperatures and pressures is critical. Manufactured from premium materials, including carbon steel, stainless steel, and alloy steels, each flange undergoes rigorous quality checks to meet international standards, such as ASME, ANSI, and DIN. Teshi Group’s commitment to excellence is reflected in its advanced production facilities, which employ the latest technology and precision-engineering techniques to ensure flawless results. As an ISO 9001:2015 certified organization, Teshi Group maintains a robust quality assurance process, making them a trusted partner for clients seeking reliable, durable, and cost-effective flange solutions. By continuously innovating and adhering to stringent quality control practices, Teshi Group has established itself as a leader in the industry, dedicated to supporting infrastructure development worldwide through high-performance piping components.
About Welding Neck Flanges :-
Welding Neck Flanges (WN Flanges) are a popular type of flange designed for high-pressure and high-temperature applications, providing a strong, reliable connection in critical piping systems. They are characterized by a long, tapered hub that gradually transitions from the flange body to the pipe, ensuring smooth stress distribution and enhanced strength at the weld joint. This taper helps reduce mechanical stress at the base of the flange, making Welding Neck Flanges particularly suitable for applications involving extreme pressure fluctuations, temperatures, and corrosive substances.
The primary feature of a Welding Neck Flange is its butt weld connection, which connects the flange to the pipe by welding their beveled ends together. This type of weld creates a seamless and secure joint that can withstand high stress, making it ideal for harsh environments. The long neck also helps reduce turbulence and erosion in the pipeline, which is important for maintaining flow efficiency and prolonging the lifespan of the piping system.
Welding Neck Flanges are commonly used in a range of industries, including oil and gas, petrochemical, power generation, and chemical processing. They come in a variety of pressure classes (such as 150, 300, 600, 900, 1500, and 2500, as per ASME B16.5) and are available in materials such as carbon steel, stainless steel, alloy steel, and other metals to suit the application’s needs.
One of the key benefits of Welding Neck Flanges is their durability under repeated thermal and pressure cycles, making them a reliable choice for demanding systems like refineries, power plants, and chemical facilities. Their construction also meets strict industry standards, including ASME B16.5, ensuring they can perform effectively in critical applications.
In summary, Welding Neck Flanges are known for their robustness and the strong weld connection they provide, which minimizes the risk of leaks and pipe misalignment over time. Their design offers advantages in handling high-stress environments, making them indispensable for high-pressure and high-temperature piping systems.
Dimensions of Welding Neck Flanges
Standard Specification of Welding Neck Flange
Standard Specifications |
Dimensions
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ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings
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Size
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1/2" (15 NB) to 48" (1200NB)
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Class
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150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS, DIN Standard ND-6,10, 16, 25, 40 Etc.
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DIN
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DIN 2527, DIN 2566, DIN 2573, DIN 2576, DIN 2641, DIN 2642, DIN 2655, DIN 2656, DIN 2627, DIN 2628, DIN 2629, DIN 2631, DIN 2632, DIN 2633, DIN 2634, DIN 2635, DIN 2636,DIN 2637, DIN 2638, DIN 2673
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BS
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BS 4504 , BS 4504, BS 1560, BS 10
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PN
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PN6, PN10, PN16, PN25, PN40
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Flange Face Type
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Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)
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Material & Grades of Welding Neck Flange
Material & Grades |
Stainless Steel Welding Neck Flange
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ASTM A 182, A 240 F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H, 904L
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Duplex & Super Duplex Steel Welding Neck Flange
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ASTM / ASME A/SA 182 F 44, F 45, F51, F 53, F 55, F 60, F 61
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Carbon Steel Welding Neck Flanges
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ASTM / ASME A/SA 105 ASTM / ASME A 350, ASTM A 181 LF 2 / A516 Gr.70 A36, A694 F42, F46, F52, F60, F65, F706
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Low Temperature Carbon Steel Welding Neck Flanges
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ASTM A350, LF2, and LF3
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Alloy Steel Welding Neck Flanges
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ASTM / ASME A/SA 182 & A 387 F1, F5, F9, F11, F12, F22, F91
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Copper Alloy Steel Welding Neck Flanges
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ASTM SB 61 , SB62 , SB151 , SB152 UNS No. C 70600 (Cu-Ni 90/10), C 71500 (Cu-Ni 70/30), UNS No. C 10100, 10200, 10300, 10800, 12000, 12200
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Nickel Alloy Welding Neck Flanges
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ASTM SB564, SB160, SB472, SB162 Nickel 200 (UNS No. N02200), Nickel 201 (UNS No. N02201), Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500), Inconel 800 (UNS No. N08800), Inconel 825 (UNS No. N08825), Inconel 600 (UNS No. N06600), Inconel 625 (UNS No. N06625), Inconel 601 (UNS No. N06601), Hastelloy C 276 (UNS No. N10276), Alloy 20 (UNS No. N08020)
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Application Of Welding Neck Flange
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Application |
1
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ANSI B16.5 Class 150 Welding Neck Flange uses in Industrial Boilers Industry
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2
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ASTM A182 Stainless Steel Welding Neck Flange uses in Power Plants Industry
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3
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ASME B16.47 Series A and B Welding Neck Flange uses in Nuclear Plants Industry
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4
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Stainless Steel Welding Neck Flange uses in Oil & Gas Industry
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5
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Super Duplex Steel Welding Neck Flange uses in Refineries Industry
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6
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Industrial Welding Neck Flange uses in Ship Building Industry
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7
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Super Duplex Steel Welding Neck Flangea Forged Flange uses in Heat Exchanger Industry
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8
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Carbon Steel Industrial Welding Neck Flange uses in Condensers Industry
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9
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Alloy Steel Industrial Welding Neck Flange uses in Paper & Pulp Industry
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10
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Duplex Steel Industrial Welding Neck Flange uses in Marine Applications
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11
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Stainless Steel Industrial Welding Neck Flange uses in Nuclear Power Industry
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12
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Industrial Welding Neck Flangea / Fittings System uses in Fossil Fuel Power Plants Industry
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Teshi Group Is A Leading Suppliers In Welding Neck Flanges In India
We supply welding neck flange to Agra, Ahmedabad, Ajmer, Aligarh, Allahabad, Ambattur, Amravati, Amritsar, Asansol, Aurangabad, Bangalore, Bareilly, Belgaum, Bhavnagar, Bhilai Nagar, Bhiwandi, Bhopal, Bhubaneswar, Bikaner, Chandigarh, Chennai, Coimbatore, Cuttack, Dehradun, Delhi, Dhanbad, Durgapur, Faridabad, Firozabad, Gaya, Ghaziabad, Gorakhpur, Gulbarga, Guntur, Gurgaon, Guwahati, Gwalior, Haora, Hubli and Dharwad, Hyderabad, Indore, Jabalpur, Jaipur, Jalandhar, Jalgaon, Jammu, Jamnagar, Jamshedpur, Jhansi, Jodhpur, Kalyan & Dombivali, Kanpur, Karnataka, Kochi, Kolapur, Kolkata, Kota, Loni, Lucknow, Ludhiana, Madurai, Maheshtala, Malegoan, Mangalore, Meerut, Mira, Bhayander, Moradabad, Mumbai, Nagpur,Nanded Waghala, Nashik, Navi Mumbai, Nellore, Noida, Patna, Pimpri & Chinchwad, Pune, Raipur, Rajkot, Ranchi, Saharanpur, Salem, Sangli Miraj Kupwad, Siliguri, Solapur, Srinagar, Surat, Thane, Thiruvananthapuram, Tiruchirappalli, Tirunelveli, Udaipur, Ujjain, Ulhasnagar, Vadodara, Varanasi, Vasai Virar, Vijayawada, Visakhapatnam, Warangal.
Welding Neck Flange Exporter to all major cities in the world
We export welding neck flange to Seoul, Hanoi, Los Angeles, Rio de, Houston, York, Dammam, Al-Khobar, Bogota, Al-Jubail, Chiyoda, Abu Dhabi, Kuwait Santiago, Perth, Busan, London, Jakarta, Surat, Courbevoie, Dallas, Calgary, Mexico Muscat, Aberdeen, City, Edmonton, Riyadh, Caracas, Ahvaz, Brisbane, Moscow, Milan, Manama, Ulsan, Jaya, Granada, Vung Petaling, Melbourne, Montreal, Port-of-Spain, La Victoria, Istanbul, Janeiro, Karachi, New Singapore, Madrid, Lagos, Atyrau, Sydney, Kuala Dubai, City, Bangkok, Toronto, Gimhae-si, Lumpur, Jeddah, Pimpri-Chinchwad, Tehran, Doha, Ho-Chi-Minh-City, Algiers, Tau, Colombo, Ernakulam, Geoje-si, Cairo, Sharjah, Lahore.
Teshi exports welding neck Flanges in more than 50 countries. We have shipments going out monthly to different countries for our newly acquired customers. Our ready stock of Flanges helps us ship the Flange and meet the requirement and demands of our customers as fast as possible.
Welding Neck Flange
A Welding Neck Flange (WNRF Flange) has a long tapered hub that can be welded with a pipe.This flange type is used, normally, in high-pressure and high/low temperature applications that require an unrestricted flow of the fluid conveyed by the piping system (the bore of the flange matches with the bore of the pipe).The absence of pressure drops prevents negative effects as turbulence and erosion/corrosion of the metals in the proximity of the flanged joints.
The tapered hub allows a smooth distribution of the mechanical stress between the pipe and the weld neck flange and facilitates the execution of radiographic inspections to detect possible leakages and welding defects.The dimension of the flange (nps and the pipe schedule) shall match the dimension of the connecting pipe.
We manufacture IBR weld neck flanges, Galvanized weld neck flange , Stainless steel (SS) weld neck flange , Carbon steel (CS) weld neck flange , MS weld neck flange , Alloy weld neck flange , Inconel weld neck flange, Monel Nickel weld neck flange , Duplex stainless steel (DSS) weld neck flange , Super Duplex stainless Steel (SDSS) weld neck flange and Brass weld neck flange .
We Export Welding Neck Flange to United States (USA), Canada, Germany, Japan, France, Middle-East, Bangladesh, Nepal etc.
Product
Export
Frequently Asked Questions
Most frequent questions and answers
What is a Welding Neck Flange?
A Welding Neck Flange is a type of flange with a long tapered hub that is butt-welded to a pipe, providing enhanced strength and durability in high-pressure and high-temperature applications.
What are the main uses of Welding Neck Flanges?
Welding Neck Flanges are primarily used in high-stress environments, such as oil and gas, chemical, and power generation industries, due to their strength and resistance to stress.
How is a Welding Neck Flange installed?
Installation involves butt-welding the flange to the pipe, creating a strong and leak-resistant connection that can withstand high pressure and thermal stress.
What are the benefits of using Welding Neck Flanges?
The main benefits include excellent fatigue resistance, leak-tight sealing, and a smooth flow of fluids through the pipe, thanks to their seamless connection.
Are Welding Neck Flanges suitable for high-pressure applications?
Yes, Welding Neck Flanges are ideal for high-pressure applications due to their robust design, which distributes stress evenly along the flange.
What are the pressure ratings for Welding Neck Flanges?
Welding Neck Flanges are available in various pressure classes, typically from Class 150 to Class 2500, suitable for a wide range of pressure requirements.
How do Welding Neck Flanges compare to Slip-On Flanges?
Welding Neck Flanges are more durable and suited for high-pressure applications, while Slip-On Flanges are easier to install but better suited for lower-pressure systems.
What materials are available for Welding Neck Flanges?
Common materials include stainless steel, carbon steel, alloy steel, and more, chosen based on the specific requirements of the application.
What standards do Welding Neck Flanges adhere to?
Welding Neck Flanges typically comply with standards such as ASME B16.5 and ANSI, ensuring quality and compatibility with other piping components.
How do Welding Neck Flanges handle thermal expansion?
Welding Neck Flanges accommodate thermal expansion well, making them ideal for high-temperature applications where thermal stress is a concern.
Can Welding Neck Flanges be used in corrosive environments?
Yes, Welding Neck Flanges made from corrosion-resistant materials, like stainless steel, are suitable for use in corrosive environments.
What industries commonly use Welding Neck Flanges?
Welding Neck Flanges are widely used in industries like oil and gas, petrochemical, power generation, and water treatment due to their strength and reliability.
How are Welding Neck Flanges manufactured?
They are typically manufactured through a forging process, which provides high strength and durability, and then precision-machined to meet industry standards.
Are Welding Neck Flanges reusable?
Welding Neck Flanges can often be reused if they are in good condition, though they should be inspected thoroughly for signs of wear or corrosion.
Do Welding Neck Flanges require a gasket?
Yes, Welding Neck Flanges require a gasket to create a leak-proof seal between the flange faces, enhancing the connection’s reliability.
What is the difference between Raised Face and Flat Face Welding Neck Flanges?
Raised Face Welding Neck Flanges provide a better seal for high-pressure applications, while Flat Face types are typically used in low-pressure systems.
What is the purpose of the long tapered hub on a Welding Neck Flange?
The tapered hub reduces stress concentration and provides a smooth transition between the flange and pipe, improving durability under high-pressure conditions.
How do I choose the right material for a Welding Neck Flange?
Material choice depends on the system’s operating temperature, pressure, and the nature of the fluid. Common options include stainless steel for corrosion resistance and carbon steel for standard applications.
Can Welding Neck Flanges handle high temperatures?
Yes, Welding Neck Flanges are designed for high-temperature applications, especially when made from heat-resistant materials like stainless or alloy steel.
What is the difference between a Welding Neck Flange and a Lap Joint Flange?
Welding Neck Flanges are welded directly to the pipe, while Lap Joint Flanges work with a stub end and are ideal for systems requiring frequent assembly and disassembly.
Do Welding Neck Flanges have specific maintenance requirements?
Regular inspections are recommended, especially in high-stress applications, to check for signs of wear, corrosion, or leaks in the weld and flange face.
Are custom Welding Neck Flanges available?
Yes, many manufacturers offer custom Welding Neck Flanges to fit unique application requirements and dimensions.
Can Welding Neck Flanges be used with hazardous materials?
Yes, their secure, welded connection makes them suitable for hazardous materials, reducing the risk of leaks in high-stress environments.
What type of gasket is recommended for Welding Neck Flanges?
Spiral wound gaskets or ring-type joint (RTJ) gaskets are commonly used for Welding Neck Flanges, especially in high-pressure applications.
Are Welding Neck Flanges suitable for underground piping?
Yes, if made from corrosion-resistant materials and properly sealed, Welding Neck Flanges can be used in underground piping applications.
Can Welding Neck Flanges be used in high-vibration applications?
Yes, Welding Neck Flanges provide excellent stability and are ideal for high-vibration applications, as their tapered hub minimizes stress.
What is the life expectancy of Welding Neck Flanges?
With proper material selection and maintenance, Welding Neck Flanges can last many years, even in high-stress applications.
Are Welding Neck Flanges cost-effective?
While they may have a higher upfront cost due to installation, their durability in high-stress environments makes them a cost-effective choice in the long term.
Can Welding Neck Flanges handle both gases and liquids?
Yes, Welding Neck Flanges are versatile and suitable for both gaseous and liquid media, commonly used in pipelines carrying natural gas, steam, and oil.
What are the size options available for Welding Neck Flanges?
Welding Neck Flanges come in a range of sizes, typically from 1/2 inch to over 24 inches, to accommodate various pipe sizes.
How does Welding Neck Flange thickness vary by pressure class?
The flange thickness and hub size increase with the pressure class, allowing the flange to handle higher pressures and reducing the risk of failure.
Are Welding Neck Flanges easy to install?
Installation requires welding, making it more complex than bolted flanges, but the welded connection provides exceptional strength and stability.
What are the temperature limits for Welding Neck Flanges?
Temperature limits vary by material, but Welding Neck Flanges are generally suitable for applications with temperatures up to several hundred degrees Celsius.
Can Welding Neck Flanges be galvanized?
Yes, carbon steel Welding Neck Flanges can be galvanized to enhance corrosion resistance in applications where they may be exposed to moisture.
How are Welding Neck Flanges inspected?
Inspection includes checking the weld integrity, flange face for smoothness, and ensuring there are no signs of wear or corrosion.
What types of bolts are recommended for Welding Neck Flanges?
Bolts should match the flange material and pressure rating; high-tensile bolts are typically recommended for high-pressure, high-temperature systems.
