More than 90 per cent of damage to underground utility lines is caused during excavation work. An underground warning tape by KELMAPLAST is a simple and affordable way to prevent damage-related costs and construction delays from even arising because they make the timely and reliable location of utility lines possible.

These are the key benefits of these amazingly easy-to-lay tapes
– perfect warning effect thanks to brilliant colours (yellow, blue, green, red as standard);
–precise identification of the type of line and its owner (permanent legibility of print thanks to transparent lamination);
– the material is resistant to all influences in the ground and also environmentally compatible (laminated PE tape).

KELMAPLAST has developed two types of underground warning tape according to two completely different principles. One is based on the tapes’ elongation and the other on their tensile strength in relation to their rated breaking point – the choice is up to the customer.

KELMAPLAST Underground Warning Tape No 10 – in accordance with German standard FTZ 548464 TV1

The product with an elongation to breaking point of up to 300 per cent is laid in the ground roughly 30 to 40 cm above the utility line. When earthworks are in progress, the excavator catches on the tape, stretching it until it tears apart in the bucket above the ground to give a visible danger warning.

Technical features

Thickness: 150 μm ± 20 μm
Elongation: up to 300 %
Tensile strength (in accordance with DIN EN ISO 527): ≥ 20 N/mm²
Temperature stability: -20 °C to +70 °C

Chemical stability

No change in colour after 24 hours of exposure to:
25 % nitric acid
20 % sodium carbonate solution
20 % ammonium iron sulphate

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KELMAPLAST Underground Warning Tape No 94 – in accordance with DIN EN 12613

Jointly developed in collaboration with the Institute of Damage Assessment Research in Hanover, the University of Applied Sciences in Mainz and Deutsche Telekom and conforming to all safety and production specifications of DIN EN 12613, this tape – thanks to its great tensile strength –tears lengthwise along its perforation only when the excavator bucket exerts extreme force on it. Even when the excavator is working at high speeds, fragments of the torn tape are brought to the surface, giving the excavator driver a perfectly visible warning that utility lines are buried in the ground there.

Technical features

Thickness: 250μm ± 20 μm
Tensile strength (in accordance with DIN EN 12613, Item 6.3.3, Type 1): 200 N
Temperature stability: -20 °C to +70 °C

Chemical Stability

No change in colour after 24 hours of exposure to:
10 % nitric acid
20 % sodium carbonate solution
20 % ammonium iron sulphate

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