Détails essentiels
numéro de spécification:FL000-1
Introduction du produit
A flange is a versatile disc-shaped mechanical component designed for connecting, securing, and sealing pipes, valves, pumps, or industrial equipment. It enables detachable joints—facilitating easy maintenance and disassembly—while ensuring leak-proof performance in piping systems.
Flanges come in various types (weld neck, slip-on, blind, threaded, etc.) and materials (carbon steel, stainless steel, alloy steel, plastic, etc.), tailored to different operating conditions. They adhere to global standards like ASME B16.5, EN 1092, and GB/T 9112, which define dimensions, pressure ratings (Class/PN), and compatibility requirements. Sealing is achieved via gaskets (rubber, graphite, PTFE, metal spiral wound) placed between mating flanges, with bolts tightened uniformly to create a secure seal.
Widely used across oil and gas, chemical processing, water treatment, power generation, HVAC, and marine engineering, flanges accommodate diverse pressure (-20°C to 800°C+) and temperature ranges. Their adaptability to high-pressure, corrosive, or general-purpose environments makes them a fundamental component in industrial piping systems worldwide.
Basic Information
- What is a flange?It is a disc-shaped mechanical component used to connect pipes, valves, pumps, or equipment, enabling detachable joints via bolts/nuts.
- What are the core functions of a flange?Key roles include connecting and securing components, facilitating easy maintenance/disassembly, and ensuring leak-proof sealing.
- What are the common materials for flanges?Typical materials include carbon steel, stainless steel (304/316), alloy steel, copper, aluminum, and plastic (PVC/PP) for corrosion-prone applications.
Types & Standards
- What are the main types of flanges?Common types include weld neck, slip-on, socket weld, blind, lap joint, and threaded flanges—each designed for specific installation needs.
- What are the global flange standards?Major standards include ASME B16.5 (US), EN 1092 (Europe), GB/T 9112 (China), and JIS B2220 (Japan), specifying dimensions and pressure ratings.
- How to choose the right flange type?Consider factors like operating pressure, temperature, pipe material, installation space, and maintenance frequency.
Installation & Sealing
- What sealing materials are used with flanges?Common gaskets include rubber, graphite, PTFE (Teflon), metal spiral wound, and non-asbestos gaskets—selected based on pressure and temperature.
- What precautions are needed for flange installation?Align flanges evenly (no misalignment), torque bolts uniformly (cross pattern), and use compatible gaskets to prevent leaks.
- How to ensure a leak-proof flange joint?Clean flange surfaces (remove dirt/rust), select the correct gasket material, and follow torque specifications for bolt tightening.
Usage & Maintenance
- What pressure and temperature ranges can flanges withstand?Pressure ratings (Class 150-2500 or PN 10-420) vary by material; carbon steel flanges typically handle -20°C to 450°C, stainless steel up to 800°C.
- How to maintain flanges in long-term use?Regularly inspect for leaks, corrosion, or loose bolts; replace worn gaskets; and clean surfaces to prevent buildup.
- What causes flange leaks?Common causes include misalignment, uneven bolt torque, damaged gasket, corroded flange surfaces, or exceeding pressure/temperature limits.
Application Scenarios
- Where are flanges widely used?They are applied in piping systems for oil and gas, chemical industry, water treatment, power generation, HVAC, and marine engineering.
- Can flanges be used for high-pressure or corrosive environments?Yes. High-pressure flanges (Class 600+) and corrosion-resistant materials (stainless steel, alloy) are designed for such scenarios.