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Nipolets

Nipolets are one-piece branch connection fittings with an extended pipe body, designed for valve take-offs, drains, and vents, featuring male socket-weld or male threaded outlets.

Ideal for high-pressure and high-temperature piping systems, Nipolets are widely used in oil and gas, petrochemical, and power generation industries for efficient branch connections.

Nipolets

Nipolets combine the functionality of a Weldolet with an integrated nipple, offering a self-reinforced branch connection with an extended body for specialized applications like valve take-offs, drains, and vents. Available with male socket-weld or male threaded outlets, they provide versatility in connecting branch pipes without additional fittings. Typically ranging from 3.5 to 6.5 inches in length, Nipolets are manufactured for Extra Strong (XS) and Double Extra Strong (XXS) schedules, ensuring durability in demanding conditions. Their design simplifies installation and enhances system integrity in high-pressure environments.

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Key Properties of Nipolets

  • Extended Body: Provides additional length for valve take-offs and drains, reducing the need for extra fittings.
  • Connection Options: Available with male socket-weld or male threaded outlets for flexible installation.
  • High Strength: Designed for Extra Strong and Double Extra Strong applications.
  • Stress Reduction: Integrally reinforced to minimize stress at the branch connection.

Common Standards and Materials

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

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

Applications of Nipolets

Nipolets are essential in industries requiring reliable branch connections for specialized purposes in piping systems:

  • Oil and Gas: Used for valve take-offs and vents in processing facilities and pipelines.
  • Petrochemical: Facilitates drains and instrumentation connections in reactors and plants.
  • Power Generation: Supports high-pressure steam and water branching in power plants.
  • Chemical Processing: Ensures secure connections in corrosive fluid 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 Male Socket-Weld, Male Threaded (NPT per ASME B1.20.1)
Size Range 1/2" to 4" (Branch); Up to 36" (Run)
Length 3.5" to 6.5"
Pressure Rating Class 3000, 6000, 9000
Wall Thickness Sch XS, XXS
Testing Standards ASME B31.3, ASME B16.11

Considerations for Use

  • Connection Type: Ensure compatibility of socket-weld or threaded outlets with branch pipe specifications.
  • Material Compatibility: Match Nipolet material to run and branch pipe to prevent corrosion.
  • Welding Quality: Use proper welding techniques for socket-weld Nipolets to ensure joint integrity.
  • Thread Maintenance: Clean and lubricate threaded connections to prevent corrosion and ensure smooth operation.