TR FLEX Restrained Joint Pipe - International

The TR FLEX® is capable of accomodating traditional open trench projects, as well as horizontal directional drilling (HDD) applications, the TR FLEX®  line of products is a flexible and reliable option. Easily disassembled. Sizes DN 100 through DN 1200 suitable for 25 Bar working pressures; 17 Bar working pressures for DN 700 through DN 1200. Perfect for HDD applications.

Installation Video for 4 - 20" TR FLEX Joint

Installation Video fo 24 - 36" TR FLEX Joint

Product Downloads


  • TR FLEX Sales Information Sheet - International

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  • TR FLEX®and HP LOK® Ductile Iron Pipe & Fittings (Metric Version)

    General Specifications: Dimensions in accordance with the requirements of ISO 2531. Variations from the Standard are so noted.

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  • TR FLEX® Ductile Iron Pipe & Fittings (versión Española)

    Las tuberías y los accesorios TR FLEX® ofrecen juntas flexibles de empuje ancladas para tuberías y accesorios de hierro dúctil de 4 a 64 pulgadas. Las juntas sirven para presiones de trabajo de 350 psi para tuberías y accesorios de 4 a 24 pulgadas, y presiones de trabajo de 250 psi para tamaños de 30 a 36 pulgadas.

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  • TR FLEX® Ductile Iron Pipe and Fittings (versión Española / métrico)

    Especificaciónes Generales: Dimensiones y Masas

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Product Information


Product Information
Horizontal Directional Drilling with TR FLEX® Pipe
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FAQs // TR FLEX Restrained Joint Pipe - International

There are many variables that determine the length of pull. The type of soil, size of equipment, amount, concentration and viscosity of the bentonite in the drilling mud are just a few of the variables that can determine the length of the pull. The longest pull to date was 2120 feet of 12” TR FLEX® pipe.

Soil conditions can vary widely and change dramatically within the length of the intended pull, it is for this reason that consideration be given to take soil samples at regular intervals along the intended bore-path at the depth of the bore. This information would enable the drilling operator to adjust the bentonite mixture, viscosity and add any other stabilizing additives as per the bentonite manufactures recommendations.

Double poly-wrap is recommended either with the first layer being the low-density poly with high-density over the outside or double wrapped with low-density.

Spiral winding is easier to do in a muddy trench and also does not allow the drilling mud to build-up underneath the poly-wrap causing it to balloon. All over-lapped edges of the poly-wrap should be taped except for the over-lapped poly along the length of the barrel, where the spiral winding is sufficient.