Overview
Plate Flange (also known as Flat Welding Flange, PL Flange) is a key component in pipeline systems, featuring a simple neck-free flat structure designed for easy welding and installation. It is widely used for connecting pipes, valves, pumps, and equipment in industrial and civil applications, offering reliable sealing performance and cost-effectiveness. Compliant with international standards, our plate flanges are manufactured with high-precision processes and premium materials to meet diverse operational requirements.
Manufacturing Standards
International Standards: ASME ANSI B16.5, EN 1092-1 (BS EN 1092-1), ISO 7005-1, DIN 2501.
National Standards: GB/T 9119 (China), JIS B2220 (Japan).
Quality Control: Each product undergoes dimensional inspection (CNC measurement), pressure testing (hydrostatic/air pressure test), and surface quality checks to ensure compliance with standard requirements.
Manufacturing Process
Raw Material Selection: Premium steel plates/forgings with certified material certificates (MTC).
Cutting & Forming: Precision cutting (plasma cutting, laser cutting) or forging (die forging, free forging) to shape the flange blank.
CNC Machining: High-precision CNC lathes/milling machines for turning, drilling bolt holes, and machining sealing faces (tolerance: ±0.05mm).
Surface Treatment:
Galvanizing (hot-dip/electro-galvanizing): Corrosion protection for outdoor or humid environments.
Passivation (stainless steel): Enhances corrosion resistance.
Painting: Customizable colors for specific industrial needs.
Quality Inspection: Dimensional verification, mechanical property testing (tensile strength, hardness), and leak testing (for high-pressure grades).
Application Fields
Petroleum & Natural Gas: Pipeline transportation, refineries, gas processing plants.
Chemical Industry: Chemical reactors, acid-base pipelines, pharmaceutical production equipment.
Water Treatment: Municipal water supply, sewage treatment plants, desalination systems.
Power Generation: Thermal power plants, nuclear power plants, boiler pipelines.
Shipbuilding & Marine Engineering: Ship pipelines, offshore platforms.
Food & Beverage: Food processing equipment, beverage production lines (stainless steel grades).
HVAC & Construction: Building heating/cooling systems, plumbing pipelines.
Product Advantages
Cost-Effective: Neck-free design reduces material usage and production costs; 50%-60% cheaper than welding neck flanges.
Easy Installation: Simple flat welding process, no specialized skills required; reduces installation time by 30%-40%.
Versatile Compatibility: Supports multiple standards, sizes, and materials; compatible with most pipeline systems.
Reliable Sealing: Precision-machined sealing faces ensure leak-proof performance (sealing success rate >98% in standard conditions).
Durable & Long-Lasting: High-quality materials and surface treatment extend service life to 10-15 years in harsh environments.
Customization & Quality Assurance
Custom Services: We offer customized dimensions, pressure ratings, sealing faces, and surface treatments to meet specific project requirements.
Quality Certifications: ISO 9001, CE, API (optional for oil & gas applications).
Warranty: 1-year warranty against manufacturing defects; free technical support for installation and maintenance.
