High Temperature (HT) rings and modules are similar to standard EFC inflatable rings but are capable of testing pipes operating at up to 350°C (660°F) provided that the ring is used in the manner specified in GUL's Standard Practice for GWT of High Temperature Pipe-work (GUL 207:2013).
In order to carry out the guided wave inspection, only a 50 cm (20 inch) wide strip of insulation needs to be removed. No couplant is required and the inspection can be performed while the pipe is still on line.

Accepted Transducer Modules:
HT


High Temperature two row adjustable transducer modules with two different spacings to inspect across a wide band of frequency range. These are needed for the ring to reach full operational temperature. Key application areas include:
- Bare Pipes
- Painted Pipes
- Sleeved or Unsleeved Road Crossing Pipes
- Buried Pipes
- High Temperature Pipes
Adjustable


The two row adjustable transducer modules used with EFC rings also fit in an HT ring. With four transducer spacings, it is possible to inspect across a wide band of frequency range. The wide frequency range assists in more difficult inspections such as:
- Buried Pipes
- Pipes with large numbers of welded supports
- Inspections for Localised Pitting
Specifications:
Modules | w/ HT Modules | w/ Adjustable Modules |
Number of Channels | 16 channels (8 as an option) | |
Nominal Pipe Sizes | 6" to 36" (DN 150 to 900) (join rings to get larger sizes) | |
Operating Temperature | -40° to +350°C (660°F) | -40° to +150°C (300°F) |
Radial Clearance | 63 mm (2.5") | |
Compatibility | Any Wavemaker® instruments |
Notes:
- HT, HT-HD solid rings are available for smaller diameter pipes.
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