China Professional CNC Turning Stainless Steel Flange Sleeve Bushings Full Coupling flange coupling

Product Description

Product Details


Product Name Socket-welded Full Coupling
Material Stainless steel: 201,TP304,TP316, TP304L, TP316L, 304L, 316L, TP321, TP310S, 904L etc.            
Carbon steel: A105, Q234, Q235, X52, F60,F70, Y60, Y70 etc.
Duplex steel: 2205(S31803), S32205, 2507(S2750),  S3276 etc.
Other special: C70600, 254MO
Connection Socket Welding
Size 1/8″, 1/4″, 3/8″, 1/2″, 3/4″, 1″, 1-1/4″, 1-1/2″, 2-1/2″, 3″, 4 ” etc
Standard ASME, ANSI, MSS-SP, GB etc
Application Pipe lines connection of water, steam, air, gas, oil etc
Technics Forged, Casting

Socket Welding

DN Nom Pipe Size       B2 C1 D2 E2 J (Min)
Avg Min

6 1/8 10.8 3.18 3.18 6.9 6.5 9.5
8 1/4 14.2 3.78 3.30 9.3 6.5 9.5
10 3/8 17.6 4.01 3.50 12.6 6.5 9.5
15 1/2 21.8 4.67 4.09 15.8 9.5 9.5
20 3/4 27.2 490 4.27 21.0 9.5 12.5
25 1 33.9 5.69 4.98 26.7 12.5 12.5
32 1-1/4 42.7 6.07 5.28 35.1 12.5 12.5
40 1-1/2 48.8 6.35 5.54 40.9 12.5 12.5
50 2 61.2 6.93 6.04 52.5 19.0 16.0
65 2-1/2 73.9 8.76 7.67 62.7 19.0 16.0
80 3 89.8 9.52 8.3 78.0 19.0 16.0
100 4 115.2 10.69 9.35 102.3 19.0 19.0
6 1/8 10.8 3.96 3.43 4.0 6.5 9.5
8 1/4 14.2 4.60 4.01 6.4 6.5 9.5
10 3/8 17.6 5.03 4.37 9.2 6.5 9.5
15 1/2 21.8 5.97 5.18 11.8 9.5 9.5
20 3/4 27.2 6.96 6.04 15.6 9.5 12.5
25 1 33.9 7.92 6.93 20.7 12.5 12.5
32 1-1/4 42.7 7.92 6.93 29.5 12.5 12.5
40 1-1/2 48.8 8.92 7.80 34.0 12.5 12.5
50 2 61.2 10.92 9.50 42.9 19.0 16.0
15 1/2 21.8 9.35 8.18 6.4 9.5 9.5
20 3/4 27.2 9.78 8.56 11.1 9.5 12.5
25 1 33.9 11.8 9.96 15.2 12.5 12.5
32 1-1/4 42.7 12.14 10.62 22.8 12.5 12.5
40 1-1/2 48.8 48.8 12.70 11.12 28.0 12.5
50 2 61.2 13.84 12.12 38.2 19.0 16.0


Our Advantages

01. Customization

Get a perfect, custom pipe coupling



02. Advanced Technique

Mature and advanced equipment and professional test engineers ensure high quality products

03. Excellent Quality

Real material with uniform wall thickness
Smooth surface
Strong tensile strength
Corrosion resistance
Long-term use





About Us

      Founded in 2571, our company, HangZhou Dejia Special Steel Co., Ltd is specialized in producing various products such as elbows, tees, reducers, caps, flanges and valves. We can produce products according to National standard, American standard etc. It’s our feature that we can produce products of any size ad per customers’ special demands.

     Our company CHINAMFG on honesty, continuity and transparency with our clients. We would like to cooperate with global customers and make the good protection project in world market.

    Why choose our company? We features scientific and rational design, advanced production process, quality manufacturing materials,  comprehensive security protection and first-class after-sales service.


Q: What are your main products?
A: We specialize in producing a wide range of valves, elbows, flanges, Tee, Cross, gaskets etc.

Q: How long is your delivery time?
A:Usually it’s 15-30 days all the best or it’s more than 30 days according to the quantity.

Q: Do you provide samples? Free or charge?
A:Yes, we’d like to offer you samples but you have to cough up dough for shipping.

Q: How do you guarantee the quality of your products?
A: Before mass production, a few products made by our engineers for conduct tests. All products must be checked before shipping.

Q: How about your service?
A: Xihu (West Lake) Dis.g to the concept of ” Service Supremacy”, we have pre-sale service, on-purchase service and after-sales service.

Q: About packing?
A: Depending on the properties of the product, choose its appropriate packaging to protect the item from damage and allow you to purchase at ease.

Q: About color difference?
A:  All products are shot in real objects, and there will be a slight degree of color difference between the real thing and the picture due to the shooting light, the color value bias of the display, and the individual’s understanding of color. Colour is subject to the goods received.

Q: What size can your company produce?
A: We have all the common sizes on the market. In addition, we can also customize according to your needs, whether its size or material.

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flange coupling

Impact of Flange Coupling on Noise and Vibration in a Mechanical System

Flange couplings play a significant role in the overall noise and vibration levels of a mechanical system. The type of flange coupling used and its design characteristics can have varying effects on the system’s noise and vibration. Let’s explore how flange couplings impact noise and vibration in a mechanical system:

1. Rigid Flange Couplings:

Rigid flange couplings, being solid and inflexible connections, are generally considered to be more rigid than flexible couplings. As a result, they can transmit vibrations more directly between the connected shafts and the rest of the system. The lack of misalignment compensation can lead to higher stress on the bearings and other components, contributing to increased vibration levels.

However, rigid flange couplings are also less likely to introduce any additional sources of vibration due to their simple and solid construction. If the system is well-aligned and requires no misalignment compensation, rigid flange couplings can provide a stable and reliable connection.

2. Flexible Flange Couplings:

Flexible flange couplings are designed to dampen vibrations and shocks in the system. The flexibility of these couplings allows them to absorb and minimize the transmission of vibrations between the connected shafts and the rest of the system. As a result, flexible flange couplings can reduce overall vibration levels and provide a smoother and quieter operation.

Additionally, the misalignment compensation capability of flexible flange couplings helps to reduce stress on the bearings and other components. By accommodating misalignment, these couplings prevent the system from experiencing excessive vibrations that can lead to premature wear and failures.

Overall Impact:

The choice of flange coupling design will significantly influence the noise and vibration levels in the mechanical system. In applications where precise alignment is crucial, rigid flange couplings may be preferred despite potentially higher vibration levels. On the other hand, flexible flange couplings are ideal for systems where misalignment is expected or where vibration dampening is a priority.

It’s important to consider the specific requirements of the application when selecting a flange coupling. Factors such as torque capacity, operating conditions, alignment needs, and desired noise and vibration levels should all be taken into account. Proper installation and maintenance of the chosen flange coupling can also impact its performance in reducing noise and vibration levels in the mechanical system.

flange coupling

Common Installation Mistakes to Avoid When Using Flange Couplings

Proper installation is crucial for the efficient and reliable operation of flange couplings. Avoiding common installation mistakes can help ensure the longevity and optimal performance of the coupling. Here are some common installation mistakes to avoid:

1. Improper Alignment: One of the most critical aspects of flange coupling installation is ensuring proper shaft alignment. Misalignment can lead to increased wear, vibrations, and decreased power transmission efficiency. Always use precision alignment tools and techniques to achieve accurate alignment.

2. Over-Tightening: Over-tightening the coupling’s bolts can cause excessive stresses on the coupling and connected equipment. It may lead to premature failure or deformation of the coupling. Follow the manufacturer’s recommended torque values for tightening the bolts.

3. Under-Tightening: On the other hand, under-tightening the bolts may result in a loose connection, leading to misalignment and potential damage to the coupling during operation. Make sure to achieve the proper torque during installation.

4. Lack of Lubrication: Insufficient or improper lubrication of the coupling’s components can result in increased friction and wear. Follow the manufacturer’s guidelines for lubrication, and use the recommended lubricant to ensure smooth operation.

5. Contamination: Avoid introducing dirt, debris, or foreign particles into the coupling during installation. Contaminants can lead to wear and damage over time, reducing the coupling’s performance.

6. Incorrect Coupling Selection: Choosing the wrong type or size of flange coupling for the application can lead to performance issues. Consider factors like torque, speed, load, and operating environment when selecting the coupling.

7. Lack of Inspection: After installation, regularly inspect the flange coupling and its components for signs of wear, damage, or misalignment. Early detection of issues allows for timely maintenance and prevents potential system failures.

8. Ignoring Manufacturer Guidelines: Always follow the manufacturer’s installation instructions and guidelines. Each flange coupling may have specific requirements and recommendations that must be adhered to for proper functioning.

9. Incorrect Shaft Fit: Ensure that the coupling properly fits the shafts’ dimensions. A loose fit can cause slippage, while a tight fit can lead to stress concentration and premature failure.

10. Inadequate Inspection of Components: Before installation, inspect all coupling components, including flanges, bolts, and keyways, for any defects or damage. Replace any damaged parts before installation.

By avoiding these common installation mistakes, you can maximize the performance and lifespan of flange couplings in your mechanical systems.

flange coupling

How Do Flange Couplings Compare to Other Types of Couplings in Terms of Performance?

Flange couplings offer several advantages and disadvantages compared to other types of couplings, and their performance depends on the specific requirements of the application. Here’s a comparison of flange couplings with other common coupling types:

1. Flexible Couplings:Misalignment Handling: Flexible couplings, such as elastomeric or jaw couplings, excel in handling shaft misalignment, both angular and axial. Flange couplings have limited misalignment accommodation compared to flexible couplings.- Vibration Damping: Flexible couplings can absorb and dampen vibrations, reducing the impact on connected equipment. Flange couplings, being rigid, provide less vibration dampening.- Load Capacity: Flange couplings can handle higher torque and loads due to their rigid design, making them suitable for heavy-duty applications. Flexible couplings have a lower torque and load capacity but offer other benefits.2. Gear Couplings:Misalignment Handling: Gear couplings are capable of handling higher levels of misalignment, especially angular misalignment.- Load Capacity: Gear couplings are robust and can transmit high torque and handle heavy loads similar to flange couplings.- Complexity: Gear couplings have a more intricate design compared to flange couplings, which may result in higher manufacturing costs.3. Disc Couplings:Misalignment Handling: Disc couplings can accommodate moderate misalignment, but they are not as effective as flexible couplings in this aspect.- Torsional Stiffness: Disc couplings offer high torsional stiffness, making them suitable for precise motion control applications.- Temperature Resistance: Disc couplings can withstand higher operating temperatures compared to some other coupling types.4. Fluid Couplings:Slip Capability: Fluid couplings provide slip between input and output, allowing for smoother starts and reduced shock loads during acceleration.- Efficiency: Fluid couplings may introduce power losses due to fluid shear, resulting in lower efficiency compared to some other coupling types.In summary, flange couplings are ideal for applications requiring high torque transmission and rigid shaft connections. They are commonly used in industrial machinery, pumps, and compressors. However, for applications with misalignment issues, vibration concerns, or the need for torsional flexibility, other coupling types like flexible couplings or gear couplings might be more suitable. The choice of coupling depends on factors such as the specific application, misalignment, load requirements, and the desired level of vibration isolation or damping needed in the system.

China Professional CNC Turning Stainless Steel Flange Sleeve Bushings Full Coupling  flange couplingChina Professional CNC Turning Stainless Steel Flange Sleeve Bushings Full Coupling  flange coupling
editor by CX 2024-03-30