Mechanical Technology July 2016

Mechanical Technology — July 2016

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Structural engineering materials, metals and non-metals

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“

ibertex KAVI multiple layer

felt liners make it possible to

repair even heavily damaged

pipelines using the ‘no-dig’ method, with

numerous advantages over conventional

open trench pipe repair procedures,”

says Lance Woolley, business develop-

ment manager, Fibertex South Africa.

“With these cured-in-place liners, there

is no need for excavation during pipeline

repair work and thus inconvenience to

traffic, production, business or residents

is minimised.

“These environmentally-friendly nee-

dle-punched nonwoven felts are designed

to restore full or partial pipeline bearing

capacity, improve hydraulic pipeline pa-

rameters, increase flowrate and ensure

perfect pipeline tightness.

“Fibertex felts, which are resistant

to abrasion and chemical agents, are

designed to later accept the saturation of

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Polyester fibre

for cured-in-place pipe liners

Fibertex KAVI felts – manufactured from polyester fibre – form the

basis for effective coating, impregnation and installation of cured-

in-place pipe (CIPP) liners, for highly efficient ‘no-dig’ pipeline

renovation projects.

Fibertex KAVI felts, before and after: Manufactured

locally from polyester fibres, Fibertex felts form the basis

for effective cured-in-place pipe (CIPP) liners.

epoxy-based polyurethane resins to en-

sure efficient performance and extended

service life from the cured pipe liner.

Fibertex KAVI needle-punched fabrics

also ensure elasticity of the repaired pipe-

lines, providing a smooth interior, with no

joints. Contamination is minimised and

cracks in the yielding soil are prevented.”

A uniform felt weight and density is

designed to meet exact application re-

quirements, as well as the diameter and

shape of the pipe to be repaired, includ-

ing ovoid, arched or circular cross sec-

tions. Felts made for building up layers

are produced to precise width and length

specifications, with uniform thickness.

Benefits of polyester fibre-based

Fibertex cured-in-place technology also

include providing at least 50 years of

durability, biaxial stiffness; made to

exact specifications; and suitability for

inversion, pull-in and inflate installations.

The high tensile strength of the liner is

achieved using a sandwich structure and

scrim combinations in certain products

in the KAVI range.

There are two locally produced

Fibertex KAVI nonwoven fabrics in the

range – Fiberliner 030 and Fiberliner 060

that complement the European options

– KAVI 660, KAVI 6805 and KAVI 960

– and these are all available in standard

100 m length rolls.

The local Fibertex plant in Ham

marsdale, KwaZulu Natal, manufactures

an extensive range of geosynthetic prod-

ucts for use in diverse sectors, including

mining, civil engineering, construction,

waste and environmental fields. The

company also offers solutions to auto-

motive, filtration, furniture and flooring

industries.