BS ISO 8180:2020,Ductile iron pipelines — Polyethylene sleeving for site application.BS ISO 8180-2020 pdf free download.
BS ISO 8180:2020 specifies the characteristics of polyethylene film, commonly called polyethylene sleeving, used as additional protection against corrosion for ductile iron pipelines, particularly when laid in aggressive soil conditions. This film, the efficiency of which has been proved by experience, takes the form of a sheet or tube fitted around the pipes and fittings, on-site, immediately before pipe-laying.
2 Normative references
ISO 1183-1, Plastics-Methods for determining the density of non-cellular plastics-Part 1: Immersion;
ISO 527-3, Plastics-Determination oftensile properties-Part 3: Test conditions forfilmms and sheets;
ISO 7765-1. Plastic film and sheeting- Determination of impact resistance by the free- falling dart method-Part 1: Staircase methods;
ISO 6383-2, Plastics -Film and sheeting-Determination oftear resistance – Part 2: Elmendorf method.
6 Mechanical properties
6.1 Tensile strength
When tested in accordance with ISO 527-3, using test specimens of type 2, a gauge length of 50 mm and a rate of grip separation of 500 mm/min, the tensile stress at break of the film in the longitudinal and transverse directions shall be not less than 20 MPa.
6.2 Elongation
When tested in accordance with ISO 5273, using test specimens of type 2 a gauge of 50 mm and a rate of grip separation of 500 mm/min, the elongation at fracture of the film in the longitudinal and transverse directions shall be not less than 500%.
6.3 Impact resistan
when tested in accordance with ISO 7765-1 Method A, the impact resistance of the film shall be not less than 900g.
6.4 Propagation tear resistance
Then tested in accordance with ISO 6383-2, the propagation tear resistance of the film in the longitudinal and transverse directions shall be no less than 20 N.