Lap Joint Flanges are essential components in piping systems that require frequent disassembly, inspection, or alignment adjustments. Designed to pair with a stub end, they allow the flange to rotate around the pipe for precise bolt hole positioning. This design ensures easy alignment and efficient maintenance. As a trusted Chinese manufacturer, Lianhe Valve (Wenzhou Lianhe Valve Fitting Co., Ltd.) produces stainless steel flanges that meet ASME, DIN, and EN standards, ensuring reliable performance in industrial applications.
Our Lap Joint Flanges combine technical precision with operational efficiency, making them a preferred choice for industrial piping systems. Their structure minimizes stress on weld joints and simplifies alignment, reducing installation time and maintenance costs. They are also reusable, offering cost savings for systems that require regular disassembly. Key benefits include:
Outstanding corrosion resistance and durability
High temperature tolerance for demanding environments
Easy alignment and low maintenance requirements
Long service life and compatibility with multiple piping materials
All products are manufactured under ISO and CE-certified systems, reflecting our commitment to quality and reliability. Learn more about our manufacturing and quality assurance services.
Lianhe Valve manufactures Lap Joint Flanges in various materials to meet diverse industrial needs. Options include stainless steel, carbon steel, and alloy steel, ensuring suitability for different pressure ratings and environmental conditions. The stainless steel version is especially valued for its corrosion resistance and clean surface finish, ideal for chemical and food-grade applications.
All flanges comply with international standards such as ASME B16.5, ANSI, DIN, and EN. The table below summarizes common standards and material options:
| Standard | Material Options | Applications |
|---|---|---|
| ASME B16.5 Lap Joint Flange | Stainless Steel, Carbon Steel | Oil, Gas, and Industrial Systems |
| DIN / EN Standards | Stainless Steel, Alloy Steel | Chemical and Food Processing |
| ANSI Lap Joint Flange | Carbon Steel, Stainless Steel | Water Treatment and Construction |
Lap Joint Flanges are available in multiple dimensions and pressure classes to match standard piping requirements. They are typically used in low to moderate pressure systems and come in raised face or flat face types. When combined with a stub end, they provide flexible alignment and reduce wear on the pipe connection.
The following table outlines common dimensional categories:
| Type | Pressure Class | Face Design |
|---|---|---|
| Lap Joint Flange with Stub End | Class 150–600 | Raised Face |
| Flat Face Lap Joint Flange | Class 150–300 | Flat Face |
Lap Joint Flanges are widely used in industries that require frequent disassembly or precise alignment. They are common in oil and gas pipelines, chemical processing plants, food and beverage systems, water treatment facilities, and environmental projects. Their compatibility with stainless steel pipes and fittings ensures smooth integration into complex systems.
In environments where corrosion resistance and easy maintenance are critical, such as chemical or marine applications, stainless steel Lap Joint Flanges deliver exceptional reliability. For more details about our product range and technical support, visit our industrial piping solutions page.
As a professional manufacturer and global supplier, Lianhe Valve integrates research, production, and sales to deliver consistent quality and service. Our Lap Joint Flanges are engineered under ISO, CE, and EAC certifications, ensuring compliance with international standards and customer requirements. With a broad product range, large inventory, and fast delivery, we are a trusted partner for distributors and contractors worldwide.
We focus on material integrity, precision machining, and strict inspection procedures to ensure every ASME B16.5 Lap Joint Flange meets high performance and safety standards.
Choosing the right Lap Joint Flange depends on factors such as pipe size, pressure class, material, and face type. The table below provides a quick reference:
| Selection Factor | Recommendation |
|---|---|
| Material | Match with pipeline material (e.g., stainless steel for corrosion resistance) |
| Pressure Class | Choose based on system design (Class 150–600 typical) |
| Face Type | Raised or flat face depending on gasket type |
| Application | Low to moderate pressure systems requiring alignment flexibility |
During installation, ensure proper alignment with the stub end and even bolt tightening to prevent leaks. For custom dimensions or special finishes, contact our technical team through the contact page.
Q1: What is the main purpose of a Lap Joint Flange?
A1: It provides easy alignment and disassembly for piping systems that require frequent maintenance or inspection.
Q2: What materials are available?
A2: We offer stainless steel, carbon steel, and alloy steel options to suit different industrial environments.
Q3: Are they suitable for high-pressure applications?
A3: Lap Joint Flanges are typically used in low to moderate pressure systems where alignment flexibility is essential.
Q4: What standards do your flanges comply with?
A4: Our products meet ASME B16.5, DIN, EN, and other international standards.
Q5: Can I request custom sizes or finishes?
A5: Yes, we provide customization options to meet specific project requirements.
For more information or to request a quote for Lap Joint Flanges, contact Lianhe Valve today via our contact form. As a reliable manufacturer and supplier, we are ready to support your industrial piping needs with certified, high-quality solutions.
Size: 1/2" ~60" (DN10~DN1500);
Pressure: Class 150lbs ~2500lbs;PN16, PN25, PN40; 10K, 20K;
Flange Face: RF, FF, RTJ, Male Face, Female Face, Tongue Face T, Groove Face G,
Manufacturing Standard: ANSI B16.5, JIS B2220, EN1092-1,GB/T9119;
Material: ASTM A182 F304, F304L, F316,F316L, F310S, F321, F347;
Technology: Forging, CNC lathe processing;
Mark: Logo, Size, Pressure, Standard, Material, Heat No. (Can mark according to customer's requirement.);
Surface Treatment: Degreasing Cleaning, Pickling;
Packing:Bubble wrap or plastic cover -Wooden Case or Pallet;
Certificates: GB/T19001-2016, ISO9001:2015, CE;
