A special rib is incorporated in the cover to facilitate the attachment of Boreline® cable straps for the securing of the electric cable. Boreline® is constructed from high-tenacity polyester yarns, which are circular woven and then totally encapsulated to form an integrated cover and lining of a high-performance polyurethane elastomer, which is approved for use with potable water.
Boreline® has a short-length burst pressure and theoretical tensile strength as stated in the table below. The maximum extension is approximately 3% and the maximum diametric swell 15%. The material is capable of operating in water with a pH from pH 4 to pH 9. The manufacturer provides a warranty of not less than 5 years against materials and manufacturing defects.
The Boreline® is fitted with fully re-usable couplings each comprising of the body and two outer fastening clamps. The body of the Boreline® coupling contains two recesses over which the hose fits and the clamps are tightened into. The two fastening clamps are split into three equal parts. The materials are available in 316 stainless steel for use with drinking water or where water is of an aggressive nature or 304 SS. The couplings can be supplied with either BSPT or NPT male thread for attachment to the pump at one end and the Wellhead at the surface.