slotted pipes submittal 2011-1
TRANSCRIPT
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MATERIAL SUBMITTAL INDEX
ACCREDITATION & TRADE LICENSE
COMPLIANCE STATEMENT
PREVIOUS APPROVALS
TECHNICAL CATALOGUE
HEPWORTH PME (L.L.C.)POST BOX: 2345, DUBAI, U.A.E
TEL: 04 2894670 FAX: 04 2894620/1
www.corys.ae
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PREVIOUS APPROVAL
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CATALOGUE
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POST BOX: 2345, DUBAI, U.A.E
TEL: 04 2894670 FAX: 04 2894620/1
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UPVC PIPES FOR LAND DRAINS
Pipes for slotted land drains I slotted carrier drains shall be uPVC
pipes. Prior to perforation, the basic pipe shall be manufactured to BS
EN 1401 - 1, Kitemarked and shall comply with the requirement of
your contract specification. The slots shall be designed to give at leastthe minimum infiltration rates laid down in BS 5911 : Part 114. The
final configuration of the slots shall be subject to approval by the
engineer.
The slots shall be cleanly machine cut and be not less than 2 mm or
greater than 4 mm in width. The slots shall be in one 180º segment of
the barrel in one or more longitudinal rows, the slots in each row
being spaced equidistantly. Where more than one row of perforations
are provided the slots shall be staggered. No slots shall be nearer to
the ends of the barrel than the spacing between two adjacent slots.
The spacing between slots in any row may vary up to ± 20 mm.
The minimum cross – sectional area of the perforations, at the inside
surface of the pipe barrel, shall be 2700 mm² per meter run of pipe
but shall not affect the structural integrity of the pipe. Care must be
exercised to prevent impact damage when placing stone surround and
during backfilling operations over the pipes.
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Two longitudinal rows of slots(with centers staggered) aremachine cut in the pipe and areseparated radically by an angle of 90 deg between centers thus givinga large lower area of the pipe freeto carry ground water
Pipes are slotted to a pattern that
ensures minimum infiltration rateswell in excess of those specified inBS 1194 : 1969 “Concrete PorousPipes for Under Drainage” and BS65 and 540 : Part I : 1971 “ClayDrain and Sewer Pipes includingSurface Water Pipes andFittings”
This is the typical Hepworth
Standard of Slotted Drainage PipesAs previously supplied to andUsed successfully on many
Dubai Munici alit Contracts.
HEPWORTH UPVC DRAIN SLOTTED PIPES (KITEMARKED)MANUFACTURED TO BS EN 1401-1 (Ø110mm-Ø400mm)
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Set multi blade slotting machine to
centers required by the consultants / government specification
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Check the drainage pipes being used
to slot is straight & place it on slottingmachine sliding frame securely to
ensure no movements of the pipe
while slotting.
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The moving cradle which has a gear
box each end is then pushed on to theblades using even pressure
throughout the length of the pipe. The
high speed spinning blade will cut into
the pipe evenly to produce a slot.
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After slotting each row of slots are
checked for length of slot by using apvc template of appropriate size to
ensure the slots are cut correctly
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When two rows of slots are required,
the distance between each row of slotsis marked by using a template.
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Check the overall quality of slotted
pipes by Quality AssuranceDepartment and only approved
quantity pipe will be released for
delivery
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The pvc dust and saw shaving is
removed by blowing compressed airinternally & externally along the
slotted pipe.