Plate flange

Precision Manufacturing & Strict Standard ComplianceAdopt advanced CNC machining technology and heat treatment processes, achieving precise dimensional tolerance (conforming to ISO 9001:2015) and smooth sealing surface. Fully compliant with international standards (ANSI B16.5, DIN 2527, EN 1092-1, JIS B2220) and customized specifications, ensuring perfect compatibility with global piping systems.
Reliable Sealing & Safety PerformanceOptimized sealing face design (RF/FF/RTJ) with precise surface finish, ensuring leak-proof performance even under high pressure (up to Class 900/PN63) and extreme temperatures (-40℃ to 600℃). Reduces operational risks for oil, gas, chemical, and power plant applications.
Versatile Customization & Wide ApplicationSupports custom sizes (DN15-DN2000/1/2"-80"), materials, and pressure classes to meet specific project requirements. Suitable for pipeline systems in oil & gas, petrochemical, water treatment, marine, HVAC, and boiler industries—one-stop solution for industrial piping needs.


Product Details

Product Overview

Plate flanges, also known as flat flanges, are essential piping components used to connect pipes, valves, pumps, and other equipment in industrial systems. They feature a flat disc structure with bolt holes around the perimeter, enabling easy assembly and disassembly through bolted connections. Our plate flanges are available in multiple types, materials, and specifications, including standard models and custom designs tailored to your specific needs.Flat flange BS4504 PN16 200MM .jpg

Key Specifications

Category
Details
Product Types
Slip on plate flange, Blind plate flange, Flat plate flange, Weld neck plate flange, Lap joint plate flange
Materials
Carbon steel (A36, Q235B, Q345B), Stainless steel (304, 316L, 321), Alloy steel (16Mn, 15CrMo), Duplex steel (2205, 2507)
International Standards
ANSI B16.5, ASME B16.47, DIN 2527, EN 1092-1, JIS B2220, GB/T 9119
Pressure Class
Class 150, 300, 600, 900; PN10, PN16, PN25, PN40, PN63
Size Range
DN15 - DN2000 (1/2" - 80")
Sealing Face Type
RF (Raised Face), FF (Flat Face), RTJ (Ring Type Joint), MFM (Male-Female Face)
Manufacturing Process
Forging, CNC precision machining, Heat treatment (quenching & tempering), Sandblasting, Anti-corrosion coating
Quality Certification
ISO 9001:2015, CE, API 6A, RoHS, REACH

Core Product Advantages

Exceptional Durability: Made from high-purity raw materials with strict chemical composition testing, our plate flanges exhibit excellent corrosion resistance, high-temperature tolerance (-40℃ to 600℃), and strong pressure-bearing capacity. The forged structure enhances material density, reducing the risk of cracks and leaks in harsh working conditions.

Precision & Compatibility: Adopting advanced CNC machining centers, the dimensional tolerance of our flanges is controlled within ±0.02mm, ensuring a perfect fit with global piping systems. All products comply with international standards, eliminating compatibility issues for cross-border projects.

Reliable Sealing Performance: The optimized sealing face design with Ra 1.6-3.2 surface finish ensures tight sealing even under high pressure and vibration. This significantly reduces operational risks in oil, gas, and chemical pipelines, minimizing maintenance costs.

Flexible Customization: We support customizations of size, material, pressure class, and surface treatment according to your project drawings or samples. Whether it's a small-batch special specification or a large-scale customized order, we can meet your needs efficiently.

Cost-Effective Supply: As a direct factory, we cut out middlemen to offer competitive wholesale prices. We maintain a large inventory of standard flanges, ensuring fast delivery (7-15 working days for stock items; 20-30 working days for custom orders) to avoid project delays.

Eco-Friendly Production: Our production processes adopt energy-saving equipment and recyclable materials, complying with global environmental standards. The anti-corrosion coating is non-toxic and pollution-free, helping you achieve sustainable development goals.

Application Scenarios

Our plate flanges are widely used in various industrial fields due to their versatile performance:

Oil & Gas Industry: Pipeline systems for exploration, extraction, and transportation

Chemical & Petrochemical Industry: Reactors, storage tanks, and medium transmission pipelines

Power Generation: Thermal power plants, nuclear power plants, and renewable energy systems

Water Treatment: Municipal water supply, sewage treatment, and desalination projects

Marine & Shipbuilding: Ship piping systems and offshore platform equipment

HVAC & Boiler Systems: Heating, ventilation, and boiler connection pipelines

Quality Control & After-Sales Service

Quality is our top priority. We implement strict quality control throughout the production process, including raw material inspection, process monitoring, and finished product testing (ultrasonic testing, X-ray testing, pressure testing, and hardness testing). Every flange is accompanied by a quality inspection report to ensure it meets your requirements.
We provide professional after-sales service: 24-hour technical support to answer your questions about installation and use; if there is any quality problem caused by our manufacturing, we will provide free replacement or refund services.


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