Select Language: 

Longline (HTP1F)

Products > Series (Longline) Heaters > Longline (HTP1F)



Product Features


Longline (HTP1F) is a series resistance, single conductor heating cable . It is supplied in multiples of three cables for configuring into a 3 phase heating system. It is used for freeze protection or process temperature maintenance of long pipelines up to 5km. A typical application is the freeze protection of above ground water pipelines.

Longline (HTP1F) minimises the number of electrical supplies needed and so minimises supply cabling and distribution equipment costs. Circuits are often fed at the pipe ends only.
The number of heating cables and their conductor size is varied to produce the desired heat output for the circuit length required. The Longline (HTP1F) heating cables are connected directly to the 3 phase mains voltage or to a step-up transformer.
The large heated surface of Longline (HTP1F)’s flat foil construction results in lower operating temperatures than equivalent round conductor constructions thereby improving safety and system life. The high efficiency produces high power capability up to 23W/m for each cable.
Longline (HTP1F) heating cable may be straight traced or spiral traced to above ground pipes. For buried lines, cables are usually drawn into channel raceways within a pre-insulated pipeline system. The installation of Longline (HTP1F) is quick and simple and requires no special tools. See Product, Application and Documentation Links below.



  Click to see larger image
Thermoplastic Outer Jacket
  Click to send us an email Are you interested in Longline (HTP1F) ?
Click on the Icon to send us an email and someone will contact you.

Product Specification

Maximum Withstand Temperature 135°C (275°F)


Longline (HTP1F) is available in outputs upto 23 W/m as illustrated on the graph to the right.  The graph shows the nominal power output at 480V 3 phase, 1500 metre long pipe with 1 x 12mm² conductor but with 3 cables, when installed on insulated metal pipes.  The output of the cable is varied by changing the voltage or the size of the conductors.  Click on the graph to see a larger version.

  Maximum Withstand Temperature 125°C (257°F)
  Power Supply Upto 600V 3 phase
  Cable Dimensions 22.0 x 8.0 mm (16mmFoil)
  Click on the graph to see a larger version.
Nominal power output  against pipe temperature
  Minimum Installation Temperature -40°C (-40°F)
  Minimum Bending Radius 75mm (16mm² Foil)
  Weight kg/100m 65 kg (16mm² Foil)


Maximum Workpiece Temperatures (°C)
Heater Nominal Output (W/m) T6 T5 T4 T3 T2 T1 Safe
   10 - - - - - - 100
   15 - - - - - - 85
   23 - - - - - - 70
Surface temperature limits in acordance with EN50014.
Product and Application Datasheets
HTP1F Datasheet

Latest News

  • Heat Trace - 'going the distance'      More... | 27 July 2015
  • Heat Trace Ltd November new starters      More... | 21 December 2017
  • National Apprenticeship Awards 2019      More... | 13 December 2019
  • BEWARE - COUNTERFEITERS      More... | 15 June 2010
  • Heat Trace Ltd - July - September new starters      More... | 27 September 2017
  • 2017 New starters      More... | 22 June 2017