plate flange

Simplified Installation & Maintenance

The flat welding design allows for easy alignment between the flange and pipe, requiring no specialized welding equipment or highly skilled operators. The welding process is straightforward with annular fillet welds, reducing installation time by 30%-40% compared to necked flanges. For maintenance or replacement, the flange can be quickly disassembled without damaging the main pipeline, minimizing downtime in industrial operations.

Wide Compatibility & Versatility

Available in multiple standards (ASME ANSI B16.5, EN 1092-1, ISO 7005-1, GB/T 9119) and sizes (DN10-DN2000, 1/2"-80"), it supports various pressure ratings (PN6-PN40, Class 150-Class 600) and sealing faces (FF, RF, T/G, RJ). Compatible with carbon steel, stainless steel, alloy steel, and non-ferrous metal pipes, it is widely used in petroleum, chemical, natural gas, water treatment, power generation, and shipbuilding industries.

Reliable Sealing Performance

The flat or raised sealing face (FF/RF) is precision-machined via CNC technology, ensuring a tight fit with gaskets (rubber, PTFE, metal spiral wound). When paired with appropriate gaskets, it achieves leak-proof sealing even under medium-low pressure and normal temperature conditions, with a sealing success rate of over 98% in standard operating environments.

Lightweight & Space-Saving Design

The compact neck-free structure reduces the overall weight of the pipeline system, lowering the load on supports and hangers. Its slim profile requires less installation space, making it ideal for confined areas

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Product Details

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.

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Material Type	Grade Examples	Key Properties	Application Scenarios
Carbon Steel	A105, Q235B, 20#	High strength, cost-effective, good weldability	Petroleum, water treatment, general industrial pipelines
Stainless Steel	304, 316, 316L	Corrosion-resistant, oxidation-resistant	Chemical, food processing, marine, high-purity systems
Alloy Steel	A182 F11, F22, F91	High-temperature/high-pressure resistance	Power generation, boiler systems, petrochemical refining
Non-Ferrous Metals	Copper Nickel (C70600), Aluminum	Corrosion-resistant, lightweight	Marine engineering, HVAC, low-pressure corrosive media

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.