COUPLINGS
British Standard (BS EN295)
When Band-Seal Couplings up to 600mm internal diameter are used to connect clay pipes which comply with BS EN295, they are Certified under the BSI Kitemark Scheme.
British Board or Agrément (BBA)
When Band-Seal Couplings up to 600mm internal diameter are used to connect any combination of vitrified clay, cast iron, ductile iron, concrete and PVC-u pipes, they are approved by BBA Certificate No. 90/2494.
WIS 4-41-01
Assessed under the British Standard Certification Scheme, Standard Couplings and Bushes from 100mm to 600mm internal diameter, comply with the requirements of Water Industry Specification WIS 4-41-01 ‘Specification for flexible couplings for gravity sewerage and drainage pipes’. Licence Number 33388.
Approved Quality System
BS EN ISO 9002 (BS5750)
Band-Seal Couplings which comply with BS EN295, BBA or WIS 4-41-01 requirements are manufactured under an Approved Quality System which complies with BS EN ISO 9002 (BS5750) and certified by Registered Firm of Assessed Capability Certificate No. FM1420.
COMPONENTS
Sleeves and Bushes:
Manufactured from synthetic elastomers conforming to the performance requirements of BS EN681-1
- BS EN681-1 (Lic. No. 12100) Elastomeric Material
- BS EN681-1 (Lic. No. 7729) Elastomeric Material
- BS EN681-1 (Lic. No. 7741) Elastomeric Material
The kitemark appears on products which have been endorsed as complying with the relevant European Standard. Full details of the extensive range of products carrying the kitemark are available on request.
Clamp and Shear Bands:
Manufactured from Austenitic Stainless Steel, with minimum chrome content of 17% and minimum nickel content of 8%, complying with BS EN10088-2 and incorporating high torque worm drive adjusting screws.
PRODUCT SPECIFICATION
Couplings shall be Band-Seal, produced by Naylor Drainage Ltd of Cawthorne, Barnsley, South Yorkshire and shall have approved Third Party Specification.
PERFORMANCE
Durability – when used within the conditions and recommendations detailed in this leaflet, for normal underground drainage, the couplings are expected to have a life expectancy equivalent to that of the pipeline.
External Protection – is seldom required except when the couplings are used in poorly drained coarse sand/gravel or in made-up contaminated ground, (particularly industrial fill and colliery spoil) and in all cases where the ground or groundwater contains chlorides. In the situations, a suitable propriety protection tape may be used.
Pressure Testing – Band-Seal Couplings, up to 600mm internal diameter, will resist a pressure of 1.2 bar. Couplings exceeding 600mm internal diameter will resist a pressure of 0.6 bar.
Site Testing – when correctly installed, all Band-Seal Couplings will withstand the air or water pressure tests specified in BS8301 “Code of practice for building drainage”; BS8005 “Sewerage”; Water Services Association “Sewers for Adoption” and “Civil engineering specification for the Water Industry” and Building Regulations “Approved Document H”.
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