Half-Pipe Coil Heat Transfer Surface

Limpet coil or often referred to as half-pipe, is best suited for high-pressure fluid heat transfer applications. Half-pipe coil comes in a fully-welded assembly, fit and tacked, or loose coils depending on your tank fabrication process. Our layout technicians can also produce drawings detailing the number of turns necessary for your heat transfer surface.

Defining Features

  • Handles large flow volumes effectively
  • Great for cyclic heat transfer conditions


  • Configurable for tank heads, shells, and cones
  • Low pressure drop
  • Highest heat transfer surface pressure rating out of all available heat transfer types

Specifications and Sizing

Pipe Diameters Available: 2", 3", and 4"

Material Types Available: 304 and 316 Stainless Steel

Thicknesses Available (pipe for heads): Schedule 10 and Schedule 40

Thicknesses Available (pipe for shells): 10 gauge slit coil (0.135")

Pipe Diameter Min. Starting Radius (Heads) Min. Roll Diameter (Shells)
2" 10" 30"
3" 12" 48"
4" 20" 60"

*Maximum starting radius and roll diameter will vary depending on tank head style and fabrication process used. Please contact your sales representative for more information.


Finding the right equipment that fits within your budget can be daunting. At Paul Mueller Company, we understand your needs. That’s why we offer Leasing options that give you more flexibility.

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Tank Experts Working With Tank Experts

We understand the demands of tank fabrication, to be profitable - efficiency and repeatability are crucial. We are proud to partner with tank fabrication companies all around North America to help continue the legacy of quality stainless steel manufacturing in the industry.