SanGrip 'T-Rib' Liner Sheets Home > Products & Services > SanGrip 'T-Rib' Liner Sheets

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Leading the way bringing world class valued additive products to India, Sangiris proud to announce yet another innovative product in its varied portfolio. TRibSheets have T shaped Profiles projecting on a one surface of a PE/PPplastic sheet. The T Rib sheets when embedded within Concrete providesuperior grip. The barrier created by the Thermoplastic provides the bestprotection from Chemical attack in a variety of application whereas the baseConcrete provides the necessary mechanical strength

THE NEED
Organic sulphates and inorganic sulphides are present in the slimes of sewerage flows and form the total sulphides present in the sewerage. A fraction of dissolved hydrogen sulphide is released into the sewer atmosphere as a gas.A process of bacterial reduction occurs when the hydrogen sulphide in combination with the other gases, such as carbon dioxide, is progressively oxidised, reducing the Ph to the point where it splits off with water molecules to form sulphuricacid. The powerful inorganic sulphuric acid reacts with hydrated calcium silicates and lime in the cement structure and reduces it to a soft swelling paste.Conditions are optimal for this process of sulphide attack when there is high Biological Oxygen Demand, presence of sulphates (common in all water systems), higher ambeant temperatures (quickening the kinetics of breakdown and reduction), and long detention times (flat grades - low velocities).

THE SOLULTION
T- Lining is the installation of a flexible sheet liner with locking extensions in reinforced concrete pipe and auxiliary structures to effectively protect the exposed concrete surfaces from corrosion for long periods of time that can be measured in decades.T-Lining’s projecting, moulded-in T-ribs 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.Because of SanGrip T Rib Liner Sheets '' unique combination of qualities viz., outstanding chemical, abrasion and general resistance to any other physical effects, it is recommended for a wide range of uses when protection against corrosion is necessary.There is no other better way to shield concrete other than T-Lining, which makes T-Lining a necessary precaution which should be incorporated during the project design stage.

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PE Products at Sangir:
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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 throughouta wide band of temperature range, making its user friendly and easy towork 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 is 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, [38degrees 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 types.

Shear Test: Parent material fails before weld.

Elongation of T-RIB Sheet: From 600% for HDPE to 900% for LLDPEand 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 43º C (110º F) tensile specimens and weight change specimens shall be exposed to the following solutions for a period of 112 days at 25º ±3º C(77º ± 5º F). At 28-day intervals, tensile specimens and

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PE Products at Sangir:
Pipes
Fittings
Sheets
Weld & solid rods
Profiles
Imperviousness: During the manufacture of T-Lining material the resin mixture is actually flowed, and all portions of the composition are flowed within the die toeliminate any imperfections. To further assure that SanGrip T Rib Liner sheets are uniform and free from blemishes.

Back Pressure: SanGrip T-Rib Liner sheets have been cast into concrete and then tested with water pressure up to 40psi on the back of liner plate without any evidence of rupture. 40psi back pressure would represent a ground head of approximately 85 feet.

Elongation: SanGrip T Rib Liner Sheets has a minimum elongation of approximately 200% for PVC and 600% for PE (ASTM Test D-412), and since it is locked physically into the structure of 21/2" centres, structural cracks which might occur are easily bridged.

Repair: SanGrip T Rib Liner Sheets can be easily patched by removing the damaged area and welding another piece of TLining in its place. The repaired section is as fully resistant as the original sheet. Plain sheets are supplied for repair, where needed.

Temperature Resistance: SanGrip T Rib Liner Sheets is entirely suitable for all temperatures encountered in sewage. It will also withstand continuous immersion in certain chemical solutions at temperatures as high as 100º C.

Maintenance: The dense, glossy surface of the T-Lining will not absorb or regain precipitated or crystalline materials. Fungus growth and bacterial slimes do not adhere tightly. It is easily decontaminated and maintained in a sanitary condition.

Friction: SanGrip T Rib Liner Sheets has an appreciably lower friction coefficient than concrete.

Chemical Properties Acid Resistance: Unaffected by continuous exposure to dilute solutions (at ambient temperature) of most mineral & organic acids including nitric, chromic, phosphoric & sulphuric.

Alkali Resistance: Resists solutions of alkaline chemicals such as calcium hydroxide, sodium carbonate, trisodium phosphate and sodium hydroxide when they occur as chemical waste products being transported at normal ground temperatures.

Solvent Resistance: Resists dilute solutions of alcohols as they normally occur in sewage wastes. However, SanGrip T Rib Liner Sheets are not resistant to chlorinatedhydrocarbons, esters, ketones, and similar solvents.

Petroleum Resistance: Withstands resistance to petroleum products normally occurring in municipal waste disposal systems. However, SanGrip T-Liner is not designed forcontinuous exposure to high concentrations of petroleum products.

Salt Resistance: Resistant to all highly corrosive salts such as sodium chloride, copper sulphate, calcium chloride, ferric chloride and alum.

Vegetable and Animal Oil Resistance: Resists repeated exposure to liquid vegetable and animal oils occurring as components of municipal or industrial wastes.

Fungus and Bacterial Resistance: SanGrip T Rib Liner Sheets has been exposed to continuous fungus and bacterial action without any effect on the

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  Chemical Resistance Chart
  Technical Data Sheet
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  Complete Catalogue

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PE Products at Sangir:
Pipes
Fittings
Sheets
Weld & solid rods
Profiles
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

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