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ភាសាខ្មែរContinuing the series on flange types, in this article Bao Tin Steel will introduce to you a type of flange with a slightly different shape than the usual types. That is the weld neck flanges, one of many flange lines that are quite commonly used in high-pressure pipeline systems. In this article, we will learn about what a weld neck flange is. its shape characteristics, and types of flanges,… Please refer to it!
What is a weld neck flange?
Weld Neck Flange, also known as high neck flanges (English name is Weld Neck Flange – WNF), is one of the most commonly used flange types, and it has a neck to weld to the pipe.
As the name suggests, weld neck flanges are hollow flanges that are machined and manufactured with an additional neck by forging, so they are not as thick as flanges of the same size but are quite sturdy. This neck is connected to the pipe end or accessories through bevel welding.
Shape characteristics of weld neck flange
The highlight of this type of flange is that the weld is located on the neck of the flange, so it is easy to check during the flange welding process. Therefore, they are often used in applications such as: where the weld needs to be checked for quality by ultrasonic and radiographic methods.
Welding neck flanges specifications at Bao Tin Steel
Below are the technical specifications of the weld neck flanges to help customers better understand the weld neck flange product at Bao Tin Steel:
- Size: DN15 – DN600
- Material: Steel (A105, SS400), Stainless steel (304, 316),….
- Flange standards: ANSI B16.5 Class 150, class 300, class 600, class 900, class 1500, DIN 2631 PN6, DIN 2632 PN10, DIN 2633 PN16, DIN 2634 PN25, JIS B2220 10K, JIS 20K,….
- Origin: Vietnam, China,…..
- Features: This flange has a neck welded to the pipe end or fittings through the butt weld method
* Long weld neck flange BS4504 PN40
* ANSI 150 Long Weld Neck Flange
Welding neck flanges application
Weld neck flanges applications are mainly used in systems that must work in high-pressure and harsh environments. Below are some practical applications of weld neck flanges:
- In laboratories
- Chemical production systems for processing solutions, corrosive substances such as acids, bases, salts, etc.
- Shipbuilding, etc.
Types of weld neck flanges
Weld neck flanges do not have just one type but many different types, like other types of flanges. Weld neck flanges are classified based on criteria such as shape and material, installation standards, etc. Specifically, each classification is as follows:
Classification of weld neck flanges according to neck shape
When studying the shape characteristics of weld neck flanges, manufacturers often divide them into two common types: reduced weld neck flanges and long weld neck flanges.
- Reducing Weld Neck Flange. This type of flange has a reduced flange neck diameter to weld onto smaller diameter pipes. This type of flange helps distribute pressure evenly and withstand shock in high-pressure and temperature environments.
- Long Weld Neck Flanges. Similar to the normal weld neck flanges the neck size is extended. This flange has a special structure to transfer stress to the pipe, reducing the stress concentration at the bottom, suitable for manufacturing pressure vessels and storage tanks.
Classification of weld neck flanges according to popular materials today
Flange material is a factor that affects the durability and pressure resistance of the flanges. Currently, weld neck flanges are made from 3 main materials: plastic, steel, and stainless steel. Let’s find out the details through the content below:
- Weld Neck Plastic Flanges is a weld neck flange made of plastic, mainly used to connect and lock the ends of plastic pipe systems and industrial equipment. Commonly used plastics are PVC, UPVC, CPVC, HDPE, PPR, PPH,…
- Weld Neck Steel Flanges
What is a steel weld neck flange? A steel weld neck flange is a type of flange made from cast steel. This type of steel flange is often used in environments with high temperatures and pressure. Steel has 2 forms: black steel and galvanized steel. Galvanized steel flanges are resistant to corrosion and oxidation but not resistant to chemicals.
- Weld Neck Stainless Steel Flanges
A stainless steel weld neck flange is a type of flange made from stainless steel material, also known as stainless steel 304 or 316. Stainless steel can withstand high heat and pressure and has good corrosion resistance in chemical environments. However, they are more expensive than other types of flanges.
Quotation for quality weld neck flanges, good price
With more than 10 years of experience in the industry, Bao Tin Steel is proud to be the leading importer and distributor of steel pipes, pipe fittings, flanges, etc. in Vietnam. Owning a large warehouse with a variety of types, Bao Tin Steel will meet all customer requirements.
With a variety of sizes and reasonable prices. The price of welding neck flanges ranges from 34,000 to 120,000 VND. Bao Tin Steel is confident that it is the optimal choice for customer needs.
Above is detailed information about the welding neck flanges line; everyone can refer to it to understand more clearly and from there know how to choose the right equipment for the project. If you need this type of flange, please contact Bao Tin Steel for support and price quotes!