T Rib Profile Sheets

SanGrip T Rib Profile Sheets are flexible sheet liner with locking extensions in reinforced concrete pipe and auxiliary structures that effectively protect the exposed concrete surfaces from getting corrode for a longer time that can be measured in decades. T Rib Profile Sheets are designed to allow concrete to flow around them during casting, permanently locking the liner into place as an integral part of the concrete substrate. T Rib Profile Sheets have excellent resistant against abrasion, chemical.


Range :

  • Thickness : 1.65 mm to 4.5mm thick
  • Wide : 1100 to maximum 1500mm
  • Length : as per Customer Requirements
  • Material of Construction : PE - HDPE / LLDPE


PE  Liners can also be jointed and sent in Rolls or Tube form as per customer requirements.

Features :

  • Excellent resistance to corrosive chemicals, gases such as hydrogen sulphide, acids, alkalis, and highly offensive salts.
  • Permanent bonding to concrete substrates prevents de-lamination due to high groundwater backpressure
  • Unaffected by continuous exposure to high humidity and water
  • Joints are heat welded to form a continuous lining over the entire structure.
  • If damaged, it can be repaired quickly and easily by removing the damaged area and welding another piece in its place.
  • Flexible liner is able to bridge cracks in the structure without peeling of the T-Lining material
  • Strong sanitary bacteria and ever-growing fungus do not affect the T-Lining.
  • Highly effective resistance to gas penetration


Typical Properties :

Thermoplastic :  SanGrip T-RIB remains flexible within a wide temperature and between 75 degrees C and 40 degrees C. T-RIB also remains stable throughout a wide band of temperature range, making its user friendly and easy to work with.


Weldability : Can be welded at any time over its lifespan using a variety of Welding methods :

  • Hot air Fusion – Speed weld
  • Hot wedge type
  • Extrusion type


As a Tank Lining : ideal for a wide range of chemicals and can withstand continuous immersion up to 71 degrees C, but upper temperature limits depending on type and concentration of chemical.

Dielectric Strength : SanGrip T-RIB is a non-conductor of electricity and resists electrolysis. The dielectric strength of the basic resins [using ASTM D149 test method, short time test] is 400-850 volts per Mil (25 Microns) of thickness.

Water Absorption Rate : (% change maximum in original weight) to ASTM D 570. Results are 0.1% over first 24 hours then the rate drops rapidly. Total absorbed amount is not increased over prolonged period.

Water Vapour Transmission Rate : Using ASTM E96 test method, [38 degrees C and 100% relative humidity] the transmission rate is about 0.020 (per 100 square inches per day) for 1.5mm thickness sheet.

Co-efficient of Linear/Thermal expansion : ASTM D696 Test method gives a rate of 1.2 x 10-4 per degree C rise in temperature. SanGrip T Rib Liner Sheets do not exhibit significant contraction / expansion differentials to concrete. Hardness – Shore Durometer 'D' is 55 at 25 degrees C. (ASTM D 2240 test method).

Tensile test of T-RIB lining/Weld Strength (ASTM D638 Test Method) :

  • Mainline Sheet : Average around 3600 psi (25 N/MM2) Field Weld All type


Shear Test : Parent material fails before weld.

Elongation of T-RIB Sheet : From 600% for HDPE to 900% for LLDPE and special resin HDPEs

Abrasion Resistance : ASTM D1044 test method. Wheel CS17 with loading of 1 kilogram. Weight loss is around 18mg per 1000 cycles.

Coefficient of Friction :

  • To ASTM test method D1894; static value 0.74
  • Kinetic Value : 0.55


Specific Gravity  (ASTM D792) :

  • *Specific Gravity for LLDPE is 0.92
  • *Specific Gravity for HDPE is 0.93+


Tear Resistance (ASTM D1004 Die C) : Test Method - Thickness 1.82 mm /Average 300N.

Low Temperature Brittleness (ASTM D746 ) :

  • Test Method : -94 degrees F.

Modulus of Elasticity (Secant Modulus) :
Expressed in Pounds per square inch.

  • 15,000 psi for LLDPE
  • 25,000 psi for HDPE


Chemical Resistance :
After conditioning to constant weight at 43oC (110o F) tensile specimens and weight change specimens shall be exposed to the following solutions for a period of 112 days at 25o ±3oC(77o ± 5o F)

At 28-day intervals, tensile specimens and weight change specimens shall be removed from each of the chemical solutions and tested. If any specimen fails to meet the 112-day exposure, the material will be subject to rejection.



  • Concrete Lining
  • Precast Concrete pipes
  • Tunnels
  • Basement Protection
  • Pulp and Paper
  • Acid Picking Tanks
  • Manholes
  • Bleach Storage Tanks
  • Fertilizer Storage Tanks
  • Chemical Waste Lines
  • Galvanizing Tanks
  • Digester Tanks
  • Concrete Ceilings in Corrosive area
  • Grit Chambers
  • Alum Storage