What is the name for pup joints that have the same internal diameter as the tubing but have a larger outside diameter and are used to mitigate turbulence and erosion?

What is the name for pup joints that have the same internal diameter as the tubing but have a larger outside diameter and are used to mitigate turbulence and erosion?

• A. Nipple
• B. Flow couplings
• C. Barrel joint
• D. Sleeve joint

Answer: (B)

This question tests the terminology for tubular connections that preserve the bore while offering a larger outer diameter to smooth the transition and reduce wear. A flow coupling is a short piece designed to connect tubing without changing the internal diameter, but with a thicker body to create a more gradual flow path. That smoother transition helps minimize turbulence and the resulting erosion at the joint, making it a common choice when you want to protect the flow and the tubing while maintaining full bore flow. The other options describe different types of joints or nipples that don’t specifically emphasize reducing turbulence with a larger outer diameter while keeping the same internal diameter.

This question tests the terminology for tubular connections that preserve the bore while offering a larger outer diameter to smooth the transition and reduce wear. A flow coupling is a short piece designed to connect tubing without changing the internal diameter, but with a thicker body to create a more gradual flow path. That smoother transition helps minimize turbulence and the resulting erosion at the joint, making it a common choice when you want to protect the flow and the tubing while maintaining full bore flow. The other options describe different types of joints or nipples that don’t specifically emphasize reducing turbulence with a larger outer diameter while keeping the same internal diameter.