POLYETHYLENE SLEEVES
Product Range: DN100- DN2000mm
Protective polyethylene sleeves shall be used with all DI pipes and fittings to be installed in buried condition and shall be in accordance with ISO 8180.
The minimum nominal thickness of the sleeve shall be
(150 Microns) Up to (300 Microns).
The material shall be made from a polymer with a melt flow
index as measured according to BS 2782, of 10 or less and a density in the range of 0.915 to 925g/ml.
The sleeve shall be free from pinholes, gels, undispresed raw materials and particles of foreign matter. The film may not contain more than 5% by weight of material other than polyethylene.
Polyethylene sleeving shall be stored in cool dry store away
from direct sunlight or excessive heat, the length of the roll, the pipe size for which
it is intended.
POLYETHYLENE SLEEVING (APPLICATION)
•TECHNICAL SOLUTIONS:
Polyethylene sleeving (application)
Polyethylene sleeving is made up
of overlapping elements:
– a “barrel sleeve” along the barrel of every pipe,
– a “joint sleeve” at every joint.
•BASIC INSTRUCTIONS:
Pipes and fittings must be as clean and dry as possible before
sleeving. In particular avoid soil entrapment between the pipe and sleeving.
The pipe bed and natural soil, or backfill, must only consist of fine material, to avoid sleeving damage occurring during laying or in service (top loads, weight of full main, wheel loads).
The sleeving must fit the pipes as snugly as possible (importance of the fold and ties). See sketches opposite.
The barrel and joint sleeve overlaps must provide total continuity of protection.
The fold must always be made at the top of the pipes, to limit the risk of damage during backfilling. Do not use ripped sleeving and avoid damage during backfilling.
Small tears can be repaired with adhesive tape. Larger defects can be covered with –
extra sleeving of the same type, which must be sufficiently long to cover the damaged area.
The same application technique must be used as for the joint sleeves.
The polyethylene sleeve must be stored under cover, protected from heat and sunlight.