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Threadolets

Threadolets are branch connection fittings with a female threaded connection, designed to mate with a threaded branch pipe, creating a secure 90° branch on the run pipe.

Ideal for small-diameter piping systems requiring quick and reliable connections, Threadolets are widely used in oil and gas, petrochemical, and chemical industries.

Threadolets

Threadolets share a similar design to Weldolets, featuring a fillet weld connection to the run pipe, but differ with a female threaded connection for the branch pipe, eliminating the need for welding the branch. This allows for a 90° branch connection using a threaded pipe, available in full-size or reducing configurations. Threadolets are particularly suited for smaller pipe sizes and systems where welding is impractical, offering ease of installation and robust performance in high-pressure applications.

Key Properties of Threadolets

  • Threaded Connection: Female threads enable quick branch pipe attachment without welding.
  • Stress Reduction: Reinforced design minimizes stress at the connection point.
  • 90° Branch: Provides a perpendicular branch for efficient piping layouts.
  • Versatile Sizing: Available in full-size or reducing configurations for various pipe sizes.

Common Standards and Materials

Threadolets are manufactured to meet stringent industry standards, ensuring compatibility and performance in demanding piping systems.

Type/Standard Material Application
Standard Threadolet: MSS SP-97, ASME B16.11 Carbon Steel (A105), Stainless Steel (304/304L, 316/316L) Oil and gas, chemical processing
High-Pressure Threadolet: MSS SP-97 Alloy Steel (A182 F11, F22), Duplex (F51), Inconel 625 Power generation, high-pressure systems

Applications of Threadolets

Threadolets are critical in industries requiring reliable and quick branch connections in small-diameter piping systems:

  • Oil and Gas: Facilitates branch connections in processing facilities and pipelines.
  • Petrochemical: Used in plants for fluid distribution and instrumentation lines.
  • Chemical Processing: Ensures secure connections in corrosive fluid systems.
  • Instrumentation: Supports small-diameter piping for control systems.

Specifications

Properties Values & Limits
Material Carbon Steel (A105), Stainless Steel (304/304L, 316/316L), Alloy Steel (A182 F11, F22), Duplex (F51), Inconel 625
Design Standards MSS SP-97, ASME B16.11
Connection Threaded (NPT), Fillet Weld to Run Pipe
Size Range 1/8" to 4" (Branch); Up to 36" (Run)
Pressure Rating Up to 6000 PSI (Class 3000, 6000)
Wall Thickness Sch 40 to Sch 160, XS, XXS
Testing Standards ASME B31.3, ASME B16.11

Considerations for Use

  • Thread Compatibility: Ensure branch pipe threads (e.g., NPT) match Threadolet specifications.
  • Material Compatibility: Match Threadolet material to pipe material to prevent corrosion.
  • Welding Quality: Ensure proper fillet welding to the run pipe for joint integrity.
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