Socket-welded Forged Gate Valve

The socket-welded forged gate valve is a high-pressure industrial valve designed for pipeline shut-off and flow control. Manufactured by Huadu Valve Group, it uses A105N forged carbon steel and is suitable for Class 600 working conditions.It is widely used in petroleum, chemical, power, and high-pressure steam systems where safety and sealing performance are critical.The socket-welded forged gate valve ensures stable operation and long service life in demanding industrial environments.

Raw Material & Structural Advantages

High-Quality Forged Steel Body

The socket-welded forged gate valve is made from A105N forged carbon steel, ensuring:

High strength and density

Excellent impact resistance

No casting defects such as pores or sand holes

Strict Material Inspection

Each batch of raw materials is tested using spectral analysis to ensure:

Accurate chemical composition

No recycled or substandard materials

Stable mechanical performance

Socket-Weld Connection Benefits

The socket-welded forged gate valve connection type provides:

Strong sealing performance

Better high-pressure resistance than flanges

Reduced leakage risk in critical system

Technical Specifications

Standard Parameters

Size: DN15–DN50 (regular stock)

Pressure Rating: Class 300 / Class 600

Material: A105N forged carbon steel

Type: Socket-welded forged gate valve

Temperature Range: -29°C to 570°C

Manufacturing Process

The socket-welded forged gate valve is produced through:

Integral die forging

Heat treatment (normalizing process)

CNC precision machining

Performance Features

Micron-level sealing surface accuracy

Zero-leakage sealing performance

Smooth operation without jamming

Suitable for high-temperature steam systems

Application Areas

Oil & Gas Industry

The socket-welded forged gate valve is widely used in:

Refinery pipelines

Oil transmission systems

Natural gas facilities

Chemical Industry

High-pressure chemical pipelines

Corrosive fluid control systems

Reactor inlet/outlet systems

Power Industry

Steam pipelines

Thermal power systems

Condensate pipelines

General Industrial Use

High-pressure small-diameter pipelines

Equipment isolation systems

Safety shut-off applications

Key attributes

FAQ

What is a socket-weld connection?

A socket-weld connection is a pipe joining method where the pipe is inserted into a recessed socket and then welded around the outside. It is commonly used in high-pressure, small-diameter systems.

In the case of a socket-welded forged gate valve, the pipe is inserted into the valve end socket and welded to form a strong, leak-resistant joint.

Key features of socket-weld connection

High strength and pressure resistance

Excellent sealing performance

Suitable for DN15–DN50 small pipelines

Reduced risk of leakage compared to threaded joints

Common in oil, gas, and steam systems

Should socket-weld valves be disassembled before welding?

Yes, absolutely. Before installing a socket-welded forged gate valve, the valve should NOT be partially assembled during welding.

Proper installation practice:

Remove internal components if possible (or ensure valve is fully open)

Insert pipe fully into the socket

Maintain a small expansion gap (~1.5–2 mm)

Perform welding only on the external joint

Allow cooling before operating the valve

Important notes:

Avoid overheating the valve body

Prevent welding slag from entering the valve cavity

Ensure correct alignment before welding

Improper welding can damage sealing surfaces and reduce valve life.

What is the difference between OS&Y and bolted bonnet?

These are two different structural designs used in gate valves.

OS&Y (Outside Screw & Yoke)

Stem thread is outside the valve body

Visible stem movement indicates open/close status

Easier maintenance and operation monitoring

Common in fire protection and industrial systems

Bolted Bonnet

Bonnet is connected to valve body using bolts

Internal stem design (not externally visible)

Compact structure

Widely used in general industrial applications

Simple comparison:

OS&Y = external visibility + easy operation monitoring

Bolted bonnet = compact + cost-effective structure

Both types can be applied in a socket-welded forged gate valve depending on project requirements.