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Your Professional Lap Joint Flange Supplier

 

 

Henan Pipelink Industrial Co., Ltd. was established in 2008 and is an intelligent and innovative pipe fitting enterprise specializing in the development, production, sales, and service of industrial pressure pipe fittings.

Our product scope includes elbows, tees, reducers, flanges, bends, pipe caps, forged high-pressure threaded pipe fittings, hydraulic flared flanges, double ferrule fittings, and various other metal pipe connectors.

 

 
  • Stainless Steel Lap Joint Flange
    Stainless Steel Lap Joint Flange

    Forged Stainless Steel Lap Joint Flange is composed of a butt-welding ring and a loose flange. The butt-welding ring is crafted through forging. This forging process refines the internal metal

 
Why Choose us
 
 

Complete Certification

The company has obtained ISO 9001:2015 quality management system certification as well as CE marking certification.

 
 
 

Quality Standards

Our company's products comply with a wide range of domestic and international specifications and standards, including American standards (ASME/ANSI), German standards (DIN), European standards (EN 10241), Japanese standards (JIS), British standards (BS), Russian standards (GOST), Chinese national standards (GB/T), and domestic industry standards.

 
 
 

Advanced Production Equipment

Our production capabilities are supported by advanced machinery, including CNC machining centers, CNC bending machines, automatic welding robots, laser cutting machines, CNC drilling machines, and CNC gantry machining centers.

 

 

Parameter
 

 

ASME B16.5,

HG/T20615)

Sealing Surface Type

PN

Class(LB)/Mpa/Bar

150LB

300LB

600LB

900LB

1500LB

2500LB

2.0

5.0

11.0

15.0

26.0

42.0

20

50

110

150

260

420

RF

DN15-600 (1/2"-24")

DN15-300 (1/2"-12")

RJ

 

Benefits of Lap Joint Flange
 

Easy Bolt Alignment
One of the standout features of lap joint flanges is their ability to rotate around the stub end. Unlike fixed flanges, where aligning bolt holes can be tricky, lap joint flanges make it easy to position bolts without having to adjust the pipe or the entire assembly. This results in quicker installation and less stress on the piping system.

 

Reduced Material Costs
In many applications, the backing flange of a lap joint does not come into contact with the process fluid. This means you can opt for a more cost-effective material for the backing flange while using a corrosion-resistant or high-strength material for the stub end. This approach can result in significant savings, particularly in large-scale projects or systems with expensive materials like stainless steel.

 

Perfect for Frequent Disassembly
If you anticipate the need to take apart and reassemble your piping system often, lap joint flanges are an excellent choice. Since the flange can be easily rotated and is not permanently welded to the pipe, disassembly is straightforward. This makes lap joint flanges popular in systems that require frequent cleaning, inspection, or maintenance.

 

Less Stress on Piping

The lap joint flange’s loose design helps absorb movement in the piping system. Because the flange is not rigidly fixed, it can better tolerate the natural vibrations, thermal expansions, and contractions that often occur in pipes. This can reduce stress on the weld joint and the pipe, helping to extend the system’s overall lifespan.

 

Applications of Lap Joint Flanges

 

Petrochemical and Oil & Gas Industry

In the oil and gas industry, piping systems often require frequent inspection, cleaning, and maintenance. Lap Joint Flanges are ideal for these applications because they allow for easy disassembly and reassembly of the piping system. The ability to rotate the flange around the pipe makes it easier to align bolt holes, reducing the time and effort required for maintenance.

01

Chemical Processing Plants

In chemical processing plants, where corrosive fluids and gases are often transported, Lap Joint Flanges are used with corrosion-resistant stub ends made from materials such as stainless steel or nickel alloys. The flange itself can be made from a less expensive material, as it does not come into direct contact with the corrosive fluid. This reduces costs while maintaining the integrity of the system.

02

Water Treatment and Desalination Plants

Water treatment and desalination plants often require piping systems that can be easily disassembled for cleaning and maintenance. Lap Joint Flanges are used in these systems because of their ability to be easily removed and reinstalled. Additionally, the use of corrosion-resistant stub ends ensures the longevity of the system in harsh environments.

03

Food and Beverage Industry

In the food and beverage industry, hygiene and cleanliness are critical. Lap Joint Flanges allow for the easy disassembly of piping systems for cleaning and sterilization. The use of corrosion-resistant materials, such as stainless steel, ensures that the piping system remains sanitary and free from contamination.

04

Marine and Shipbuilding Industry

In the marine industry, where piping systems are exposed to harsh environmental conditions, Lap Joint Flanges are used in conjunction with corrosion-resistant stub ends to ensure the longevity of the system. The ability to easily disassemble and reassemble the piping system is also beneficial for maintenance and repairs in marine applications.

05

 

Considerations for Using Lap Joint Flanges

Pressure and Temperature Ratings
Lap Joint Flanges are available in various pressure ratings, typically ranging from Class 150 to Class 2500. It is important to select a flange with the appropriate pressure rating for the application to ensure that it can withstand the operating conditions. Additionally, the temperature rating of the flange and stub end materials should be considered, especially in high-temperature applications.

Material Compatibility

The material of the stub end must be compatible with the fluid or gas being transported to prevent corrosion or degradation. Common materials for stub ends include stainless steel, nickel alloys, and carbon steel. The Lap Joint Flange itself can be made from a less expensive material, as it does not come into direct contact with the fluid.

Corrosion Resistance

In corrosive environments, it is essential to select materials that offer adequate corrosion resistance. The stub end, which is in direct contact with the fluid, should be made from a corrosion-resistant material, such as stainless steel or nickel alloys. The flange can be made from a less expensive material, but it should still offer some level of corrosion resistance to ensure longevity.

Maintenance Requirements

Lap Joint Flanges are ideal for systems that require frequent disassembly and maintenance. However, if the system does not require regular maintenance, other types of flanges, such as Weld Neck Flanges, may be more suitable due to their superior strength and durability.

 

316L BLRF FLANGE4

 

Logistics

We will help you to choose the best shipping way according to your detail requirements. By sea, by air, or by express, etc.

1. The Time Frame Of An Order Delivery Is Divided Into Two Parts:
Processing time: 7-14 Days
Shipping time: 20~30 Days


2. Shipping Methods: DDP, DAP, EXW, etc.


3. Shipping Fee: The shipping fee will be changed according to every pacel's weight.

 

FAQ

Q: What is the difference between a lap joint flange and a slip-on flange?

A: A lap joint flange uses a stub end to attach to the pipe, allowing the flange to rotate freely. A slip-on flange, on the other hand, slides over the pipe and is welded directly.

Q: Can lap joint flanges be used for high-pressure systems?

A: No, lap joint flanges are best suited for low-pressure and low-temperature environments. For high-pressure systems, welded flanges like weld neck or plate flanges are recommended.

Q: What materials are lap joint flanges made from?

A: They can be made from various materials, including carbon steel, stainless steel, and specialty alloys, depending on the system’s requirements and conditions.

Q: How do you install a lap joint flange?

A: The stub end is welded to the pipe, and the lap joint flange fits loosely over the stub end. Once the pipe sections are aligned, the flange is bolted together with the mating flange.

As one of the leading lap joint flange manufacturers and suppliers in China, we also support customized service. We warmly welcome you to buy high quality lap joint flange for sale here from our factory. Good service and reasonable price are available.

lap jis, stub end lap joint

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