Threaded vs Socket Weld Fittings – Which one should you choose?
When it comes to connecting pipes and components in a piping system, choosing the right connection method is critical for performance, safety, and maintenance. Threaded fittings and socket weld fittings are two of the most commonly used types, each with its own advantages and ideal applications.
ANSI ASME B16.11 ASTM A105 threaded 90 degree elbows
1.What Are Threaded Fittings?
Threaded fittings, also known as screwed fittings, are designed with internal or external threads that allow them to be screwed directly onto the pipe.
Common Standards: ASME B16.11 (Forged Steel), ANSI/ASME B1.20.1 (NPT thread)
Common Materials: A105N, A197 (malleable iron), stainless steel, brass
Pros:
- Easy to install without special equipment
- Cost-effective for low-pressure, low-temperature applications
- Ideal for temporary or modular systems
Cons:
- Leak risk due to thread wear or poor sealing
- Not suitable for high-pressure or vibration-prone systems
- Thread galling possible in stainless steel fittings
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ASME B16.11 90 Degree Socket Weld Elbows
2.What Are Socket Weld Fittings?
Socket weld fittings are connected by inserting the pipe into a socket and applying a fillet weld around the joint.
Common Standards: ASME B16.11
Typical Materials: A105N, stainless steel
Pros:
- Stronger joint than threaded fittings
- Better for high-pressure, high-temperature, or toxic media systems
- More leak-proof compared to threads
Cons:
- Requires skilled welding labor and inspection
- Not ideal for corrosive or clean-service piping (risk of crevice corrosion)
- Welding may induce stress and distortion
3.Selection Guide
Use threaded fittings for:
- Non-critical systems
- Portable, modular equipment
- Low-cost applications
Choose socket weld fittings for:
- High-pressure pipelines
- Systems with hazardous fluids
- Where structural integrity is a must
Haihao Group, as a premier provider of piping solutions, offers an extensive selection of threaded fittings, socket fittings, and other pipe products tailored to your needs. For further information or customized solutions, please don’t hesitate to contact our dedicated team. We look forward to delivering exceptional service and support. Email:sales@haihaogroup.com