Lap Joint Flanges

A lap joint flange is a flange type used to connect piping components through bolting and a matching stub-end assembly. The flange can rotate around the pipe, helping with bolt-hole alignment during installation. Selection should consider the piping system, applicable ASME or API requirements, material, dimensions, and pressure rating for the intended service.

Twinco Industrial’s flange inventory includes carbon steel, stainless steel, alloy steel, duplex, and nickel alloys. Material selection should reflect the piping service, environmental conditions, temperature, pressure, corrosion considerations, and project specifications. Confirm the required material and documentation when requesting a quote so the proposed flange matches the application and applicable standards.

The available flange range includes products aligned with ASME B16 Series requirements, including ASME B16.5 and ASME B16.47 Series A and B, as well as API standards. The correct standard depends on the product configuration, size, pressure class, and project specification. Buyers should provide the governing standard and required rating when requesting options.

Twinco Industrial lists both rental and purchase options for flange solutions. Rental can support hydrostatic testing, maintenance, shutdown, construction, and other project-specific requirements, while purchase may suit recurring installations or permanent piping needs. Availability depends on the requested configuration, material, size, rating, quantity, and project requirements.

Lap joint flanges are used across pipeline applications, industrial piping systems, hydrostatic testing, petrochemical projects, construction and welding, and manufacturing maintenance. They may be considered where installation alignment and future disassembly are important. The final selection should be reviewed against the piping design, connection arrangement, operating conditions, applicable standards, and procurement specifications.

Provide the flange type, nominal size, pressure class or API rating, material, governing standard, quantity, and intended application. If the item is for hydrostatic testing or maintenance, include whether rental or purchase is preferred. Sharing project specifications and delivery requirements helps Twinco Industrial identify suitable options from its industrial flange inventory.