Characteristics of Carbon Steel Plate Flat Welding Flanges

Carbon steel plate flat welding flanges are a common type of pipe connection component, mainly used to connect pipes, valves, pumps, and other equipment to achieve sealing and connection of piping systems. The following is a brief overview of carbon steel plate flat welding flanges, based on online information and relevant background knowledge:

Characteristics

Simple Structure: Carbon steel plate flat welding flanges are connected to pipes by fillet welds. The pipe is inserted into the flange bore to the appropriate position and then welded, making installation and processing relatively convenient.

Material: Mainly made of carbon steel (such as Q235, 20#, 16Mn, ASTM A105, etc.), which has good strength and durability and is suitable for a variety of working environments. In some cases, stainless steel or alloy steel can also be selected to enhance corrosion resistance.

Low Cost: The manufacturing process is simple, the materials are readily available, and the price is relatively low, making it suitable for widespread use.

Applicable Scenarios: Suitable for pipeline systems with low pressure (generally not exceeding 2.5 MPa), pressure fluctuations, vibration, and mild shocks, such as heating, ventilation, water supply and drainage, petrochemical, and shipbuilding industries.

Advantages

Easy to Install: Easy to align during welding, the installation process is simple, and suitable for rapid construction.

Sealing Performance: Effective sealing is achieved by filling the sealing surface with gaskets, preventing fluid leakage and ensuring the safe and stable operation of the system.

Maintainability: The design considers the convenience of disassembly, cleaning, and maintenance, reducing maintenance costs.

Disadvantages

Poor Rigidity: Compared to other types of flanges (such as neck flat welding or butt welding flanges), plate flat welding flanges have lower rigidity and are not suitable for high pressure, high vacuum, or flammable and explosive environments.

Stress Characteristics: The stress performance is between integral flanges and lap joint flanges, and the pressure bearing capacity is limited.

Manufacturing Standards

Complies with multiple standards, such as:

National Standard: GB/T 9119-2010

Chemical Standard: HG20592

Mechanical Standard: JB/T 81-2015

International Standards: American Standard (ASTM), German Standard, Russian Standard, Japanese Standard, etc.

These standards specify the flange sealing surface form, pressure range, and production process requirements, and are widely used in petrochemical, energy, and other industries.

Application Areas

Pipe Connection: Used for steam pipelines and low and medium pressure pipeline connections of carbon steel pipes.

Equipment Connection: Such as inlet and outlet connections of pressure vessels, pumps, valves, and other equipment.

Industries: Aerospace, energy, metallurgical machinery, shipbuilding, petrochemical, etc.