Split Flange

Updated: 2026-07-25

Overview

A double flange is a critical component in industrial piping systems, designed to connect pipes, valves, and other equipment securely. It features flanges on both ends, facilitating easy assembly and disassembly for maintenance or system modifications. Double flanges are widely used in industries such as oil and gas, chemical processing, and water treatment. These flanges are engineered to withstand high pressure and temperature, ensuring leak-proof connections. They are available in various materials, including carbon steel, stainless steel, and alloy steel, to suit different environmental and operational requirements.

Structure and Working Principle

Double flanges consist of two flanges welded or bolted to a central pipe section. The flanges are typically drilled with bolt holes to align with mating flanges, creating a tight seal when gaskets and bolts are applied. The design ensures uniform pressure distribution, minimizing the risk of leaks. The working principle involves compressing a gasket between the flanges to form a seal. When bolts are tightened, the flanges press the gasket, creating a barrier against fluid or gas escape. This mechanism is highly reliable for high-pressure applications.

Key Features

Double flanges are known for their durability and versatility. They are resistant to corrosion, especially when made from stainless steel or coated materials. Their standardized dimensions ensure compatibility with various piping systems globally. Another key feature is their adaptability to different gasket types, such as rubber, PTFE, or metal, depending on the application. This flexibility makes them suitable for diverse industries, from food processing to heavy industrial use.

Application Areas

Double flanges are indispensable in sectors requiring robust piping solutions. In the oil and gas industry, they connect pipelines, pumps, and storage tanks. Chemical plants use them for handling corrosive fluids, while water treatment facilities rely on them for large-scale fluid transport. They are also common in HVAC systems, power plants, and shipbuilding, where secure and maintenance-friendly connections are crucial. Their ability to handle high-pressure and high-temperature conditions makes them a preferred choice in demanding environments.

Maintenance and Precautions

Regular inspection is essential to ensure the integrity of double flanges. Check for signs of corrosion, wear, or gasket degradation, which can compromise the seal. Bolts should be periodically retightened to maintain proper pressure on the gasket. During installation, ensure proper alignment to avoid uneven stress on the flanges. Use appropriate gaskets and torque settings to prevent leaks. Avoid over-tightening, as it can damage the flanges or gasket.

B2B Procurement Guide

When procuring double flanges, prioritize suppliers with certifications like ISO or ASME to ensure quality. Specify material grade, pressure rating, and flange standards (e.g., ANSI B16.5, DIN) to match your system requirements. Request material test reports (MTRs) for verification. Compare prices from multiple vendors, but avoid compromising on quality for cost savings. Lead times and bulk discounts should also be considered for large orders.