Pup Joints / Frac & Flowback Iron

Integral Pup Joints in Red Deer, Canada & the U.S.

RDI Pup Joints are designed and manufactured from seamless, forged, one-piece construction to provide a smooth uninterrupted bore and greater flow. Our integral pup joints can be used on high-pressure well servicing lines, fracturing lines, testing lines, cementing and circulating lines, and other well service and stimulation applications. Ideal for abrasive, standard and sour (H2S) services, our pups are a great long-wear alternative to threaded or welded pup joints. Some key features and technical details include:

  • Union connections: 2”and 3” Fig. 1502. (4” Fig. 1502 available in Select Lengths)*
  • Pup joints are available in pressures up to 15,000 psi NSCWP†
  • Detachable wingnut for easy field repair
  • A retention ring prevents the nut from sliding down the pup, reducing the risk of injury

NPST Pup Joints

RDI’s non-pressure seal thread pup joints (NPST) are a lightweight pup capable of up to 15,000 psi NSCWP†. These pup joints are available with an optional, detachable wing nut, allowing fast and easy on-site servicing. These are well suited for abrasive applications, where a smooth bore is necessary to ensure minimum turbulence. A few key features and technical details of our NPST pup joints include:

  • Availability in 2”, 3” and 4” Fig. 1502 standard service (also 2” Fig. 607 sour (H2S) service)*
  • NPST pup joints are offered in lengths up to 20 feet
  • Special lengths can be offered with minimal lead time

Welded Pup Joints

Our welded pup joints are designed and manufactured at our fabrication facility in Red Deer, Alberta. By keeping the fabrication in-house we can efficiently fulfill the needs of our customers. Our fabrication facility is ASME B31.3 certified. Some key technical details and features of our welded pup joints include:

  • Availability in 2”, 3” and 4” Fig. 206 rated at 2000 psi NSCWP†, as well as 2”, 3” and 4” Fig. 602, rated up to 6000 psi NSCWP†
  • RDI welded pup joints are offered in lengths up to 20 feet
  • Minimal lead time for special order lengths

Data Headers

Integral & welded pup joints with threaded outlets allow access to gauges, injection equipment, thermometers and sensors. Other features and details include:

  • Union connections: 2”, 3” and 4” Fig. 206, Fig. 602 and Fig. 1502*
  • Outlet ports offered as NPT or Autoclave*
  • Standard length is 2 feet. Custom configurations can be designed*
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Technical Data

1502 Integral Pup Joints 602 Welded Pup Joints | 206 Welded Pup Joints | 1502 NPST Pup Joints

Figure 1502






* Consult with RDI’s sales team for complete configurations.
† NSCWP: Non-shock cold working pressure.

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