Slip On Flanges

Understanding your choice of slip on flanges options

Choosing the right slip-on flanges for your application is crucial for the success of your project. By understanding the different slip-on flange options, materials, and factors to consider, you can make an informed decision. At Guanxin, we offer a wide range of slip-on flanges options, materials, and sizes to meet your specific application requirements. Contact us today to learn more about our products and services.

What is a slip on flange?

The full name of the SO flange is the slip-on flange, installed by extending the steel pipe and fittings into the flange and fillet welding on both sides to fix the flange to the pipeline.

The inner bore of the slip-on flange is slightly larger than the outer diameter of the pipe to ensure that the end of the pipe or fitting can slide into the flange. Slip-on flanges are fillet welded with pipes or pipe fittings, which is different from the butt-welding method of butt-welding flanges. Pipes do not need to make beveled ends; only square ends can be welded. Usually, slip-on flanges can be fillet welded with both sides of the pipe to ensure the connection quality with the pipe.

Advantages of SO flanges

The SO flange saves space and weight and ensures a leak-free joint with good sealing performance. The size of the compact flange is reduced by reducing the sealing diameter, thus reducing the cross-section of the sealing surface.

Secondly, the SO flange replaces the flange gasket with a seal to ensure that the sealing surface matches the sealing surface so that the sealing surface can be compressed with only a small amount of pressure. As the required pressure decreases, the size and number of bolts are reduced accordingly, for which a new product with a small size and light weight is designed.

With neck flat welding, flange bolts of the two sealing surfaces extrusion flange gasket to form a seal, but this will also cause damage to the seal. To maintain the seal, it shall maintain a huge bolt force, making the bolt larger; larger bolts must match the larger nut. However, is not the larger the diameter of the bolt, the better because, the larger the diameter of the bolt, the appropriate flange will be bent; it can only increase the wall thickness of the flange part; the whole device A large size and weight is required, and in this case, weight has been a major concern. In addition, a SO flange is a failure seal that requires a 50 percent bolt load to squeeze the gasket to maintain pressure.

With easy installation and low-cost advantages, the slip-on flange has been widely used. The slip-on flange is suitable for piping systems with low-pressure levels, small pressure fluctuations, and low vibration.

Types of Slip On Flanges

Slip-On Flanges are commonly used in piping systems to connect pipes or tubes. They are available in various types, such as Raised Face Slip-On Flanges, Flat Face Slip-On Flanges, Ring Type Joint Slip-On Flanges, Tongue and Groove Slip-On Flanges, and Male and Female Slip-On Flanges. The following are details of these different types of SO flanges.

1. (RF) Raised Face Slip-On Flanges: Raised Face Slip-On Flanges are among the most commonly used flanges in the piping industry. They are used in low-pressure applications and are easily installed. These flanges are designed to fit over the pipe, with the flange face protruding from the pipe slightly. The raised face provides a surface for the gasket to rest against, creating a seal between the flange and the pipe.
2. (FF) Flat Face Slip-On Flanges: Flat Face Slip-On Flanges are another common type of Slip-On Flange. They are used in applications where the piping system requires frequent dismantling. The flat face of the flange allows for easy alignment and assembly. These flanges are typically used in low-pressure applications.
3. (RTJ) Ring Type Joint Slip-On Flanges: Ring Type Joint Slip-On Flanges are designed for high-pressure applications. They are used in applications where the pressure exceeds 900 PSI. These flanges are designed with a groove on the inside of the flange, where a metal ring is inserted. The ring is compressed when the flange is bolted to the pipe, creating a seal.
4. (T&G) Tongue and Groove Slip-On Flanges: Tongue and Groove Slip-On Flanges are designed to prevent leaks in high-pressure applications. These flanges are designed with a tongue on one flange and a groove on the other. When the flanges are bolted together, the tongue fits into the groove, creating a seal.
5. (M&F) Male and Female Slip-On Flanges: Male and Female Slip-On Flanges are commonly used in applications where the piping system requires alignment. These flanges are designed with a male and female end, where the male end fits into the female end, creating a seal. These flanges are typically used in low-pressure applications.

Standard for Slip On Flanges

The design and manufacturing of SO flanges are governed by the following standards:

• ANSI B16.5 Flange
• DIN Flange
• EN 1092-1 Flange
• BS 4504 Flange
• UNI Flange
• SANS 1123 Flange
• GOST/ГОСТ 33259 Flange
• ANSI B16.47 Flange
• JIS B2220 Flange
• KOREA Flange
• BS 10 Flange
• AWWA C207 Flange
• ISO Flange
• MSZ Flange
• Australian Flange
• French NFE Flange
• Norwegian NS Flange

Materials of Slip On Flanges

Depending on the specific application requirements, slip on flanges are made from a variety of metal materials, including:

Dimensions of Slip On Flanges

Slip-on flanges come in a range of sizes and are available in both metric and imperial dimensions. The most common slip-on flange sizes are from 1/2″ to 24″. The dimensions of slip-on flanges are standardized by various organizations, such as the American Society of Mechanical Engineers (ASME), the International Organization for Standardization (ISO), and the European Committee for Standardization (CEN).

ANSI/ASME B16.5 Slip On Flange Dimensions (150lb-1500lb)

ANSI/ASME B16.5 Slip On Flange Class 150 lbs

Notes:

• Weights are based on manufacturer’s data and are approximate.
• Flat face flanges may be provided at full thickness, C, or with raised face removed (the latter is nonstandard).

ANSI/ASME B16.5 Slip On Flange Class 300 lbs

Notes:

• Weights are based on manufacturer’s data and are approximate.
• Flat face flanges may be provided at full thickness, C, or with raised face removed (the latter is nonstandard).

ANSI/ASME B16.5 Slip On Flange Class 400 lbs

Notes: Weights are based on manufacturer’s data and are approximate.

ANSI/ASME B16.5 Slip On Flange Class 600 lbs

Notes: Weights are based on manufacturer’s data and are approximate.

ANSI/ASME B16.5 Slip On Flange Class 900 lbs

Notes: Weights are based on manufacturer’s data and are approximate.

ANSI/ASME B16.5 Slip On Flange Class 1500 lbs

Notes: Weights are based on manufacturer’s data and are approximate.

Drawing, Dimensions & Tolerances

According to ASME B16.5, slip on flanges are available in six pressure ratings covering Class 150, Class 300, Class 400, Class 600, Class 900 and Class 1500 from 1/2″ to 24″, except that slip on flanges of Class 1500 are only available through 1/2″ to 2-1/2″.

As illustrated in the drawing, D: outside diameter of flange, K: diameter of bolt circle, G: diameter of raised face, B: bore diameter of slip on flange, X: diameter of hub at the large end of hub, n: number of bolt holes, d: diameter of bolt hole, Y: length through hub, T: minimum thickness of flange, t: height of raised face.

*BCC: bolt circle concentricity, which is the concentricity between the flange bolt circle diameter and machine facing diameters. *BHS: bolt hole spacing, also known as bolt hole to bolt hole, which is the center-to-center of adjacent bolt holes. *Unit of each tolerance: mm.

ASME B16.47 Series A Slip On Flange Dimensions

Manufacturing process of Slip On Flanges

Slip On Flanges can be produced by forging, casting. We mainly produce flanges by forging, cutting and rolling processes. We will take you through the step-by-step process of manufacturing slip on flanges, from the materials used to the final product.

Step 1: Material Selection
The first step in our manufacturing process is material selection. We use only the highest quality materials, including carbon steel, stainless steel, and alloy steel. Each material has its own unique properties and is selected based on the specific needs of the customer.
Step 2: Cutting
Once the materials are selected, they are cut to the desired size using a cutting machine. We use state-of-the-art cutting machines to ensure precision and accuracy in every cut.
Step 3: Heating
After the materials are cut, they are heated to the desired temperature. This helps to reduce any stresses in the material and makes it easier to shape the flange.
Step 4: Forming
The next step in our manufacturing process is forming the flange. We use a hydraulic press to shape the heated material into the desired shape. This ensures that each flange is formed with precision and accuracy.
Step 5: Solid solution
Make the structure and composition of the blank flange uniform, which is particularly important for raw materials. At high temperatures, atomic activity intensifies, σ Phase dissolution, the chemical composition tends to be uniform, and a uniform single-phase structure is obtained after rapid cooling.
Eliminate work hardening to facilitate continuous cold work. The distorted lattice is recovered through solution treatment, the elongated and broken grains are recrystallized, the internal stress is eliminated, the tensile strength of stainless-steel forgings decreases, and the elongation increases.
Restore the inherent corrosion resistance of the flange blank. Due to carbide precipitation and lattice defects caused by cold working, the corrosion resistance of the flange blank is reduced. The corrosion resistance of forgings recovered to the best state after solution treatment.
Step 6: Machining
Once the flange is formed, it undergoes machining to ensure that it is smooth and free from any imperfections. We use CNC machines to achieve the highest level of accuracy in our machining process.
Step 7: Inspection
Before the flange is considered complete, it undergoes a thorough inspection process to ensure that it meets industry standards. Our team of experts inspects each flange to ensure that it is free from any defects and meets the specifications of the customer.
Step 8: Coating
Once the inspection process is complete, the flange is coated to protect it from corrosion and other environmental factors. We offer a variety of coating options, including epoxy, zinc, and galvanized coatings.
Step 9: Packaging and Delivery
Finally, the flange is packaged and prepared for delivery to the customer. We take great care in packaging our products to ensure that they arrive at their destination in pristine condition.
At Guanxin, we take great pride in our manufacturing process of slip on flanges. We are committed to producing high-quality flanges that meet the needs of our customers. Contact us today to learn more about our products and services.

Marking of Slip On Flanges

The marking of slip on flanges is essential to their manufacture and use. The marking aims to provide information about the flange’s material, size, pressure rating, and other relevant details.
Slip On Flanges are typically marked by industry standards, such as ASME B16.5 or EN 1092-1. These standards specify the required information that must be included on the flange, as well as the format and location of the markings.
The required information typically includes the following:

• Flange size
• Pressure rating
• Material specification
• Tag number
• Manufacturer’s name or trademark
• Heat number or lot number
• Date of manufacture

The standard also specifies the location of the marking on the flange. Typically, the marking is placed on the raised face of the flange near the bolt holes. In some cases, the marking may be located on the flange hub or the plate itself.

Packing of Slip On Flanges

How to package slip on flanges? To pack the slip on flange, follow these steps:
When it comes to packaging slip on flanges, it’s important to ensure that they are properly protected and secured during transportation to prevent any damage. We will walk you through some of the key steps to follow when packaging slip on flanges.
Step 1: Clean and Inspect the Flanges
Before packaging the slip on flanges, it’s essential to clean them thoroughly to remove any dust, dirt, or debris that may have accumulated on them. You can use a cloth or brush to clean the flanges and inspect them to ensure they are free from any defects or damages.
Step 2: Choose the Right Packaging Material
The packaging material you choose should be sturdy and able to provide adequate protection to the flanges during transportation. Ideally, you should use a strong cardboard box or wooden crate that can withstand the weight and size of the slip on flanges.
Step 3: Secure the Flanges
Once you have the packaging material ready, you need to secure the flanges to prevent them from moving around or getting damaged during transit. You can use bubble wrap, foam, or any other suitable cushioning material to protect the slip on flanges from impact or shock.
Step 4: Label the Package
Labeling the package correctly is crucial to ensure that it reaches the intended destination without any confusion. You should clearly label the package with the recipient’s address, contact information, and any other necessary details.
Step 5: Arrange for Shipping
After the package is fully prepared and labeled, it’s time to arrange for shipping. You can use a reliable courier or shipping company to ensure that the package is delivered on time and in good condition.
Packaging slip on flanges requires careful planning and attention to detail. By following the above steps, you can ensure that your flanges are properly protected and arrive at their destination safely. Remember to use high-quality packaging materials, secure the slip on flanges properly, and label the package accurately to avoid any mishaps during transportation.

Inspection and Measurement of Slip On Flanges

There are several factors that need to be considered when inspecting and measuring slip on flanges, including:

Material
The first thing to inspect in a slip on flange is the material. The standard specifies that the flanges should be made from materials such as carbon steel, stainless steel, or alloy steel. The material should be free from any defects such as cracks, porosity, or inclusions that can affect the integrity of the flange.
Dimension
The next thing to inspect in a slip on flange is its dimension. The standard specifies the dimensions of the flanges based on their nominal size and pressure rating. The flanges should be inspected for their inside and outside diameter, thickness, and overall dimensions to ensure they meet the requirements of the standard.
Surface Finish
The surface finish of a flange is also important. The standard specifies that the flanges should have a smooth and even surface finish to ensure proper sealing of the gasket. Any roughness or irregularities on the surface of the flange can lead to leaks in the piping system.
Bolt Hole Alignment
The bolt holes in a flange should be aligned properly to ensure the bolts can be inserted and tightened correctly. The bolt holes should be inspected to ensure they are in the correct position and are not misaligned.
Bolt Hole Size
The size of the bolt holes is also important. The standard specifies the size of the bolt holes based on the nominal size and pressure rating of the flange. The bolt holes should be inspected to ensure they are the correct size and are not damaged.
Bolt Hole Thread
The threads in the bolt holes are important to ensure the bolts can be screwed in and tightened properly. The threads should be inspected to ensure they are clean and free from any damage or defects.

To inspect and measure slip on flanges, you will need a set of calipers or a micrometer to accurately measure the dimensions of the flange. It is also a good idea to have a torque wrench on hand to ensure that the bolts are tightened to the correct torque specification.

Application of Slip On Flanges

ASME B16.5 Slip On Flanges are known to deliver exceptional performance and are generally developed to meet the demands. We offer a broad range of Slip On Flanges through a worldwide network of stock-keeping branches.

This Slip On Flange is used in various industries:

• Slip On Flanges used in Oil and Gas Pipelines;

• Slip On Flanges used in Chemical Industry;

• Slip On Flanges used in Plumbing;

• Slip On Flanges used in Heating;

• Slip On Flanges used in Water Supply Systems;

• Slip On Flanges used in Power Plants;

• Slip On Flanges used in the Paper & Pulp Industry;

• Slip On Flange uses in General Purpose Applications;

• Slip On Flanges used in Fabrication Industry;

• Slip On Flange uses in Food Processing Industry;

• Slip On Flanges Use in Structural Pipe.

Slip-On Flanges VS Weld Neck Flanges

Slip-on flanges and weld neck flanges have some similarities and differences, as shown below:

How to purchase the correct slip on flanges?

Are you in the market for slip on flanges but don’t know where to start? Don’t worry, you’re not alone. With so many options available, it can be overwhelming to choose the right flanges for your project. We’ll go over some key factors to consider when purchasing slip on flanges to ensure that you make the right decision.
Determine the Material Needed
The first step to purchasing the correct slip on flanges is to determine the material you need. These flanges are available in a variety of materials, including carbon steel, stainless steel, and alloy steel. The choice of material will depend on the specific application and environmental conditions. If you’re unsure which material to choose, consult with a qualified engineer or supplier to help guide you in making the right decision.
Identify the Flange Face Type
Flange face types refer to the surface finish of a flange, and there are many different types of flange face finishes, including flat face (FF), raised face (RF), ring-type joint (SO), tongue and groove (T&G), male and female face (M&F). Each type of flange face has its unique characteristics and is suitable for different applications.

• Flat face (FF): This type of flange face has a flat, smooth surface that is perpendicular to the axis of the pipe. It is typically used for low-pressure applications and when the sealing is achieved by a gasket.
• Raised face (RF): This type of flange face has a raised ring on the surface that surrounds the bolt holes. The ring provides a surface for the gasket to rest on, which helps to create a better seal. It is commonly used in applications with moderate pressure.
• Ring joint face (RTJ): This type of flange face has a specially designed groove to accommodate a metallic ring gasket. The groove is cut into the surface of the flange, and the gasket sits in the groove to create a tight seal. This type of flange face is typically used in high-pressure applications.
• Tongue and groove face (T&G): This type of flange face has a raised tongue on one flange and a matching groove on the other flange. The tongue fits into the groove, creating a tight seal without the need for a gasket. This type of flange face is often used in applications where high pressure and temperature are involved.
• Male and Female Face (M&F): This type of flange face is similar to the tongue and groove face. However, it has a male and female end which creates a face to face contact between two flanges. This type of flange is mainly used for low pressure and low temperature applications.

To identify a specific flange face type, you need to provide me with more information, such as the flange’s application, dimensions, and material.
Determine the Slip on flange Size and Pressure Class
Once you have identified the material and slip on flange type, the next step is to determine the size and pressure class of the slip on flange. slip on flanges are available in various sizes and pressure ratings, and it’s crucial to select the correct size and pressure class to ensure that the flange can withstand the intended operating conditions. You should consult the system specifications and design to determine the appropriate size and pressure class.
Look for Quality and Certifications
It’s essential to ensure that the slip on flanges you purchase are of high quality and come with the necessary certifications. Look for suppliers that have a reputation for delivering high-quality products, and check for relevant certifications, such as ISO 9001, API, and CE, to ensure that the flanges meet industry standards.
Consider the Price
While the price should not be the only factor to consider when purchasing slip on flanges, it’s important to compare prices from different suppliers to ensure that you’re getting a fair price. However, remember that the cheapest option may not always be the best quality, so ensure that you’re not compromising on quality in pursuit of lower costs.
Purchasing the correct slip on flanges can be challenging, but by considering the factors outlined in this post, you can ensure that you make an informed decision that meets your project requirements. Remember to consult with experts and compare suppliers to ensure that you’re getting a high-quality product at a fair price.

How to select slip on flanges manufacturer?

Selecting the right manufacturer for slip on flanges can be a daunting task. With so many options available, it’s easy to get overwhelmed and make the wrong choice. However, choosing the right manufacturer is critical to ensure that you get the best quality flanges that meet your specific needs. We provide some tips to help you select the right slip on flanges manufacturer.
Quality of Products
The first factor to consider when selecting a slip on flanges manufacturer is the quality of their products. You should look for a manufacturer that uses high-quality materials and follows strict quality control processes to ensure that their products meet the required standards.
Industry Experience
Another factor to consider is the manufacturer’s industry experience. Look for a manufacturer that has been in the industry for a significant period and has a proven track record of delivering high-quality products to their customers. An experienced manufacturer will have a better understanding of the market and the needs of their customers.
Production Capacity
It is also essential to consider the production capacity of the manufacturer. You should look for a manufacturer that has the capacity to produce the required quantity of flanges in a timely manner to meet your project’s needs.
Pricing
Pricing is another crucial factor to consider when selecting a slip on flanges manufacturer. While it is essential to look for a manufacturer that offers competitive pricing, it is equally important to consider the quality of their products. Don’t compromise on the quality of the products for the sake of saving a few dollars.
Customer Service
The final factor to consider is the manufacturer’s customer service. Look for a manufacturer that has excellent customer service and is willing to assist you with any queries or concerns you may have. A manufacturer that values their customers will provide a better overall experience.

Choosing the right slip on flanges manufacturer is essential to ensure you get high-quality products that meet your needs. Look for a manufacturer with quality certifications, experience, a good reputation, customization capabilities, and a competitive price. By following these tips, you will be able to find the right manufacturer for your flange needs.

Why Choose Guanxin to Be Your Slip On Flange Supplier?

Guanxin is a well-established and reputable manufacturer and supplier of slip on flanges that has been providing high-quality products to customers worldwide for many years. Here are some reasons why you might choose Guanxin to be your slip on flange supplier:

• High-quality products: Guanxin is committed to providing high-quality slip on flanges made from the best materials and manufactured to the highest standards. The company has strict quality control procedures in place to ensure that each product meets or exceeds customer expectations.
• Competitive pricing: Guanxin offers competitive pricing on its products, which means you can get high-quality slip on flanges at an affordable price.
• Wide range of products: Guanxin offers a wide range of slip on flanges, including ANSI, DIN, JIS, EN, and other international standards. This means you can find the right product to meet your specific needs.
• Excellent customer service: Guanxin is committed to providing excellent customer service and support to all of its customers. The company has a team of experienced professionals who are available to answer any questions or concerns you may have.
• Fast delivery: Guanxin understands the importance of timely delivery and works hard to ensure that all orders are shipped out quickly and efficiently.

Guanxin is a reliable and trustworthy supplier of slip on flanges that can meet your needs and exceed your expectations.

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