Welding Neck Flange
Shanxi Sinomach Co., Ltd. is an industrial international supplier focusing on the design, production and sales of flanges, valves and other pipe fittings.
Since its establishment, the company has always adhered to the business principles of customer-oriented and honest business, with the purpose of meeting customer needs, and providing customers with all-round solutions and high-quality products. This makes our company a long-term partner trusted by many international customers.
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![ANSI Welding Neck Flange]()
ANSI Welding Neck FlangeRead More$ 150.00
Welding neck flange is a flange with a neck and a round pipe transition that is connected to the
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![ANSI Long Welding Neck Flange]()
ANSI Long Welding Neck FlangeRead MoreThe neck of the long welding neck flange is a straight pipe instead of a tapered reducer. Among the
Why choose us?
Our Factory
Factory covers an area of 24,500 m2 and has many professional and technical personnel, annual production capacity more than 20,000 tons/year
Our Service
Whether it is pre-sales consultation, sales, or after-sales, we will answer customers' questions 24 hours a day and provide fast and effective solutions until customers are satisfied.
Our Equipment
Our there are 7 sets of forging equipment and 10 sets of heating equipment,the product quality is safe and reliable, reaching the international standard.
Product Application
Our wind power tower flanges, pressure vessel flanges, and petrochemical flanges are used in water conservancy, oil, natural gas and other pipelines.
Long Weld Neck Flange
The long welding neck flange is a variant of the conventional welding neck flange and is extended in size.
Its most popular applications are as a nozzle for columns and barrels, available in two distinct models: The Equal LWN Barrel and the LWN Heavy Barrel, which both have a sturdy wall structure and individual shapes.
Reducing Weld Neck Flange
This type of welding neck flange gets its title “reducing” due to its decreasing neck diameter, designed to weld to reduced-sized pipes.
Nw Long Weld Neck Flanges
This type of flange is known as a high-hub flange and is designed to transfer stress to the pipe while also reducing the stress concentration at the base of the flange.
Superior strength
Weld neck flanges are incredibly strong due to their welded neck design, making them ideal for high-pressure and high-temperature applications. They are often required selections over threaded or slip on styles due to their superior integrity.
Leak resistance
Their precision welding ensures a tight seal, minimizing the risk of leaks and providing enhanced safety.
Reduced stress concentration
The smooth transition from the flange to the pipe reduces stress concentration, preventing cracks and failures.
Alignment accuracy
Weld neck flanges facilitate precise alignment of pipes, resulting in better flow and reduced turbulence.
Enhanced durability
Given their size/shape, these flanges typically have a longer lifespan due to their resistance to wear, corrosion, and erosion.
Reduced maintenance
With fewer chances of leaks and failures, maintenance costs are lower than other flange types.
Improved flow characteristics
The smooth bore of weld neck flanges reduces pressure drop and turbulence, enhancing fluid flow.
Strong and reliable
Weld neck flanges increase the pipe thickness from the weld all the way to the face of the flange. This design assures that the internally built stress by the flow of high-pressure liquid transfers to the pipe; it decreases the pressure on the flange itself.
Application of Welding Neck Flange
High-pressure applications
Weld neck flanges are essential in high-pressure systems because they evenly distribute stress across the connection. This minimizes the risk of joint failures, making them suitable for pipelines operating under pressures exceeding 2,000 psi, ensuring the structural integrity of pipelines in critical environments such as power plants, refineries, and high-stakes manufacturing facilities.
Petrochemical and oil and gas industries
In the petrochemical and oil and gas sectors, weld neck flanges are commonly used to transport high-pressure, corrosive substances. Their robust design and material options, such as stainless steel and nickel alloys, provide the necessary resistance to extreme temperatures and aggressive chemicals. These qualities make them indispensable in refineries, offshore rigs, and gas processing plants.
Power generation
Weld neck flanges play a crucial role in power generation systems, including thermal, nuclear, and renewable energy facilities. They are used in critical components such as steam lines, heat exchangers, and condensers, where leak-proof connections are essential. Their ability to withstand high temperatures and cyclical pressure changes ensures reliable performance in energy production environments.
Pharmaceutical and food processing
The pharmaceutical and food industries emphasize hygiene and corrosion resistance in their equipment. Stainless steel weld neck flanges are preferred because they are easy to clean and meet strict sanitation standards. They are used in systems transporting fluids and gases under controlled conditions to ensure product purity and safety.
Shipbuilding and maritime applications
In shipbuilding and maritime operations, weld neck flanges are essential in fuel, cooling, and ballast systems. Their secure and leak-proof connections ensure the safe transport of liquids and gases within ships, even under dynamic loading and harsh marine conditions, making them a preferred choice in these demanding environments.
Versatile industrial applications
Various industries use weld neck flanges for applications that require robust connections in challenging conditions. Their ability to handle stress, pressure, and temperature variations makes them a versatile and reliable choice in critical systems, from chemical processing plants to advanced manufacturing facilities.
Product Parameters
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Standard |
Nominal Diameter(mm) |
Pressure Class (LB/MPa/kg/cm²) |
Material |
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ASME B16.5，ANSI B16.5，ASME B16.47 |
DN15-DN3000 |
150,300,600,900,1500,2500 |
Carbon steel Stainless steel |
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DIN |
DN15-DN250 |
PN10, PN16, PN25, etc. |
Carbn steel Stainless steel |
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GB/T 9112~9124-2010 |
DN15-DN3000 |
PN1.0, PN1.6, PN2.0, PN5.0, PN10.0, PN15.0, PN25.0, PN42 |
Carbon steel Stainless steel |
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EN 1092 |
DN15-DN3000 |
PN2.5; PN6; PN10; PN16; PN25; PN40; PN63; PN100; PN160 |
Carbon steel Stainless steel |
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JIS |
DN15-DN500 |
5K, 10K, 16K, 20K |
Carbon steel Stainless steel |
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Remarks: 1. For the details of ANSI Welding Neck Flange that you need, you can contact us at any time to provide you the better solution; 2. We have the ability to produce non-standard flanges according to the drawings provided by customers, and can also provide drawings and calculations of flanges according to the design parameters of the flanges. |
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Package&Transport
We will implement the packaging materials and methods of the product in accordance with the terms of the contract signed with the customer, and choose the transportation method approved by the customer (such as sea freight, sea freight, etc.) according to the actual situation to ensure that the product reaches the customer safely and quickly.
Other Services
Payment terms
30% deposit in advance, 70% balance before shipment.
Min.order
1 pkg.
FAQ
As one of the leading welding neck flange manufacturers and suppliers in China, we warmly welcome you to buy high-grade welding neck flange for sale here from our factory. All our are with high quality and competitive price. For more information, contact us now.
Welding Neck Flange,