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Screwed Flanges – Uses, Types and Dimensions

Screwed Flanges

If you’re looking for a reliable way to connect two pieces of pipe, screwed flanges are an excellent choice. This type of flange is designed to help make it easier to attach pipes, valves, and other components together. In this blog post, we’ll explore the uses and types of screwed flanges so that you can decide if they are the best option for your needs.

What is Screwed Flanges?

Screwed flanges are pipe flanges with threaded holes for connecting to pipes or fittings. They’re used in low-pressure piping systems where welding could be more practical. These flanges are common in plumbing, heating, and air conditioning. They offer easy installation and maintenance in materials like stainless steel, brass, and cast iron. However, they may not be suitable for high-pressure or high-temperature applications due to potential sealing and stability issues. Proper installation techniques and material selection are crucial for reliable performance and leak-free operation.

Screwed Flanges Uses

Screwed flanges play a crucial role in piping systems by providing secure connections between pipes, valves, and other components. Their threaded design enables easy attachment to pipes without requiring welding, which is especially advantageous in low-pressure systems where welding might not be feasible. The simplicity of installation and versatility of screwed flanges make them well-suited for applications involving frequent disassembly and reassembly, such as during maintenance or modifications. Various industries, including plumbing and chemical processing, depend on screwed flanges for their dependable and leak-resistant connections, highlighting their essential role in diverse industrial environments.

Screwed Flanges Welding

When using screwed flanges, welding is not required because they are self-sealing. This makes them ideal in situations where welding would be difficult or impractical due to time constraints or safety issues. Additionally, because there is no welding involved, there’s no need for expensive equipment or additional labor costs associated with welding.

Screwed Flanges Types

There are several different types of screwed flanges available on the market today, including slip-on, weld neck, and threaded flanges. Each type has its own unique features and benefits, so it’s important to choose one that best meets your needs and requirements. Slip-on flanges are most commonly used for low-pressure systems while weld neck flanges are great for high-pressure systems as they provide more stability and strength than other types of flanged connections. Threaded flanges offer the highest level of security as they require a threaded nut that securely fastens the two pipes together.

Screwed Flanges Dimensions

Screwed Flanges Dimensions

CL 150 300 600 900 1500 2500
30 38 38 38 38 43
90 95 95 120 120 135
9.6 12.7 14.3 22.3 22.3 30.2
11.2 14.3 20.7 28.7 28.7 36.6
35.1 35.1 35.1 35.1 35.1 35.1
60.3 66.7 66.7 82.6 82.6 88.9
H 14 21 22 32 32 40
15.6 22.6 28.4 38.4 38.4 46.4
4 4 4 4 4 4
15.9 15.9 15.9 22.2 22.2


Screwed flanges offer many advantages over traditional methods, such as welding or soldering pipe connections together. They provide an easy way to securely join two pieces of pipe without having to worry about potential leaks caused by improper welding techniques or inadequate materials used during soldering operations. Plus, with several different types available (slip-on, weld neck, threaded), you can find one that perfectly suits your specific needs and requirements! So whether you’re looking for a quick and easy solution for connecting plumbing fixtures or need something more durable for industrial applications, screwed flanges may be just what you’re looking for!

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