At JSFITTINGS, we specialize in crafting high-quality Lap Joint Flanges, also known as LJ Flanges or Van Stone Flanges, designed to meet the rigorous demands of various industrial applications. Our commitment to precision engineering ensures that every lap joint pipe flange we produce offers exceptional performance, ease of installation, and long-term reliability.
What is Lap Joint Flanges?
A Lap Joint Flange is a unique two-component system comprising a flange ring and a separate stub end. The stub end, typically shaped like a short pipe with a flared, or “lapped,” end, fits snugly against the pipe. The loose-fitting flange ring then slides over the stub end, allowing for remarkable flexibility during alignment. This ingenious design sets our lap joint flanges apart, making them a preferred choice for systems requiring frequent disassembly and maintenance.
One of the most significant benefits of our lap joint flanges is their ease of installation. The loose fit between the flange and the stub end allows for slight movement, simplifying the alignment of bolt holes. This feature dramatically reduces installation time and labor costs compared to other flange types, making our lap joint connector flanges an efficient solution for your piping needs.
We offer a comprehensive range of lap joint flanges manufactured to stringent industry standards, including ASTM A105 Lap Joint Flanges. Our inventory also includes stainless steel lap joint flanges, such as 304 lap joint flanges and 316 lap joint flanges, perfect for corrosive environments. For higher pressure and temperature applications, we provide alloy steel lap joint flanges that deliver superior strength and durability.
Key Specifications and Customization
Our lap joint flanges are available in various pressure classes, including Class 150 lap joint flanges, Class 300 lap joint flanges, and higher, to suit diverse operational requirements. We also offer different face types, such as flat face lap joint flanges and raised face lap joint flanges, ensuring compatibility with your existing piping infrastructure.
Understanding that every project has unique specifications, we provide customizable solutions. Whether you require specific dimensions, materials, or surface finishes, our team is equipped to deliver custom lap joint flanges that precisely match your project’s needs. We adhere to international standards like ASME B16.5 lap joint flanges and EN 1092-1 Type 02 lap joint flanges, guaranteeing global compatibility and consistent quality.

Lap Joint Flanges Applications:
Chemical Industry: Lap joint flanges connect pipes carrying various chemicals, acids, and corrosive substances, where frequent maintenance and inspection are necessary.
Petrochemical Industry: Lap joint flanges are useful in the petrochemical industry and can bear high pressure and temperature.
Water Treatment Plants: Lap joint flanges are used in water treatment plants to connect pipes that transport treated or untreated water, allowing easy access during maintenance and repair.
Food and Beverage: In the food processing industry, lap joint flanges connect pipes carrying liquids and gases, ensuring hygiene and facilitating quick disassembly for cleaning.
Plumbing: The versatile lap joint flanges are also suitable for plumbing systems in residential and commercial applications.
Why Choose JSFITTINGS for your Lap Joint Flange suppliers?
Premium Quality: Utilizing only the finest raw materials, our flanges undergo rigorous quality control, ensuring superior performance and longevity.
Extensive Inventory: We maintain a large stock of common sizes and materials, allowing for quick turnaround times on your orders.
Competitive Pricing: As a direct manufacturer, we offer highly competitive pricing without compromising on quality.
Expert Support: Our knowledgeable team is always ready to assist you with technical specifications, material selection, and custom orders.
Global Reach: We supply lap joint flanges worldwide, catering to diverse international project requirements.
Invest in the reliability and efficiency of our lap joint flanges. Contact [Your Company Name] today to discuss your project needs, request a quote, or learn more about our comprehensive range of flanges and fittings. We are your trusted partner for high-performance piping solutions.
Feel free to browse our product catalog for detailed specifications on our carbon steel lap joint flanges, stainless steel lap joint flanges, and other specialized options.


