Lap Joint Flanges
Made in China Lap Joint Flanges. We can produce flanges to ASME standards, as well as flanges that meet other standards. You can also provide drawings and let us produce custom flange products.
China Lap Joint Flanges
We provide flange products of various standards, such as ASME/ANSI B16.5, EN standards, etc. We also provide customized Lap Joint flange products.
As a company with 25 years of flange production experience, we support all types of flanges, and we can give you the best product quality, the most reasonable price.
lewis Liu
Sales Manager
What is Lap Joint Flanges
A lap joint flange is a flange that is loosely attached to the flange of a container or pipe. ‌‌It is characterized by being movable on the pipe end. The flange is usually placed at the end of the pipe using a flange, a steel ring, etc., and the flange can be movable on the pipe end.
This design prevents the flange from generating additional torque on the container or pipe when deformed. It is also easy to manufacture and can be made of materials different from those of the container or pipe, thereby saving precious metals. The flange of a lap joint flange can be made by flanging, direct turning, or welding a ring.
Its advantages include not generating additional torque on the container or pipe, being easy to manufacture, and being able to be made of different materials. However, the disadvantage of a lap joint is that the flange is relatively thick and is suitable for occasions where the container or pipe is lined with brittle materials and the pressure is not high.
Lap Joint Flanges Product Image Gallery
Here are various Lap Joint Flanges produced by YANHAO. You can click on the pictures to enlarge them. As a company with 25 years of flange production experience, YANHAO supports all types of flange production.
Standardized Lap Joint Flanges
- Lap Joint Flanges are commonly standardized as ASME B16.5 and ASME B16.47, with sizes ranging from 1/2 inch to 60 inch.
- Sealing surface types include raised face (RF), flat face (FF), dimpled face (MFM), tongue and groove (TG), ring joint (RJ), and so on.
- Applicable pressure classes include Class 150, 300, 400, 600, 900, 1500, 2500.
| ASME B16.5 Lap Joint Flanges | |
| Class 150 | Class 900 |
| Class 300 | Class 1500 |
| Class 400 | Class 2500 |
| Class 600 | |
Customized Lap Joint Flanges
The following options are for you to customize. If you don’t have a design drawing, you can also consult our engineers and let us help you draw it.
size
Specified pipeline size, including flange ID and OD, thickness, bolt hole diameter, bolt hole distance, etc.
Material
Using specified material suitable for pipeline engineering according to your requirements.
Shape
can be customized with irregular flanges such as square flanges, and conical flanges, etc.
Connection
Threaded connection, welding connection, socket welding connection, etc., which can be selected.
Special Treatment
Special treatments such as surface coatings, anti-corrosion can be made according to your needs.
The customization process for flanges is generally as follows:
requirements
Confirmation
Communicate in detail to determine the requirements for flange size, material, pressure, connection method, etc.
Design drawings
Our professional engineers will design flange drawings for you. The drawings will specify the size, shape, thickness, etc. of the flange in detail.
Choose materials
Select suitable flange materials according to the requirements of the engineering project.
Customer confirmation
Send detailed information such as the designed drawings and materials to the customer for confirmation.
Processing sample
To ensure accuracy, first produce a sample according to the drawings and selected materials and send it to the customer for trial confirmation.
Production of bulk goods
After confirming the accuracy of the samples, proceed with mass production.
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About YANHAO
YANHAO is a flange manufacturer located in Hebei Province, China. It is one of the few professional flange suppliers in China.
We have many years of experience in flange production and have multiple flange production lines. We have sufficient stock of raw materials, rich inventory, fast delivery, and can ship within three days. At the same time, the price is affordable. You are welcome to consult and purchase!
In addition, we can provide a variety of bespoke flanges and pipe fittings. Customers can give drawings or samples, and our company will produce them to fit your specific requirements.
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specifications & characteristics of Lap Joint Flanges
This table provides a comprehensive overview of Lap Joint Flanges, covering key specifications, characteristics, and additional considerations. Specific details and requirements may vary based on the chosen flange size, pressure rating, and material.
| Specification/Feature | Description |
|---|---|
| Standard | ASME/ANSI B16.5 Lap Joint Flange. |
| Type | Lap Joint Flange – A type of flange consisting of two parts: a stub end and a backing flange. The stub end is butt-welded to the pipe, while the backing flange allows easy bolt-on connection. |
| Pressure Ratings | Available in different pressure classes, such as 150, 300, 600, 900, 1500, 2500, etc., to accommodate varying pressure requirements. |
| Size Range | Typically available in sizes ranging from 1/2 inches to 48 inches or larger, suitable for various pipe and equipment sizes. |
| Materials | ASME/ANSI B16.5 Lap Joint Flanges can be manufactured from materials like carbon steel, stainless steel, alloy steel, and more, chosen based on application requirements. |
| Facing Types | Common facing types include Raised Face (RF), Flat Face (FF), Ring-Type Joint (RTJ), and Male and Female (M&F) facings, impacting sealing methods. |
| Bolt Hole Quantity and Diameter | The number and diameter of bolt holes vary with flange size and pressure rating, facilitating flange connection. |
| Connection Method | ASME/ANSI B16.5 Lap Joint Flanges consist of two parts: a stub end that is butt-welded to the pipe, and a backing flange that is bolted to the stub end, allowing for easy disassembly and alignment. |
| Application Areas | Lap Joint Flanges are used in industries where easy alignment and disassembly are required, such as in systems with frequent maintenance needs. |
| Standards and Codes | ASME/ANSI B16.5 Lap Joint Flanges adhere to standards set by the American National Standards Institute (ANSI) and nominal pipe size (NPS) standards, such as ANSI B16.5. |
| Seal Types | Lap Joint Flanges commonly use gaskets or O-rings for sealing, with the choice of seal type depending on the application and pressure rating. |
| Accessories and Attachments | Some applications may require additional components such as flange gaskets, bolts, nuts, and flange cover gaskets. |
| Inspection and Testing | ASME/ANSI B16.5 Lap Joint Flanges typically undergo a series of inspections and tests to ensure they meet quality and performance requirements, in compliance with standards. |
| Marking and Certification | Lap Joint Flanges should be marked with the manufacturer’s identification, size, class, material, and other relevant information. Some flanges may require specific certifications such as PED or ASME. |
| Installation and Maintenance | Proper installation and regular maintenance of Lap Joint Flanges, including weld integrity, bolt torque, flange face cleaning, and seal replacement, are crucial for system integrity and performance. |
| Application Standards | In specific industries and applications, there may be industry-specific Lap Joint Flange application standards that need to be adhered to for safety and performance. |