Specifications for thermoplastics covers and frames for manholes and inspection chambers used in non-traffic areas has-digital and small size switching power

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Specifications for thermoplastics covers and frames for manholes and inspection chambers used in non-traffic areas has-digital and small size switching power1 Scope This International Standard specifies the definitions and requirements for thermoplastics covers and frames for inspection chambers and other such pipeline access products installed in light vehicular access and pedestrian areas and manufactured from unplasticized poly(vinyl chloride) (PVC U), polypropylene (PP), polypropylene with mineral modifier (PP MD) or polyethylene (PE). The products are rated up to B 125 max. and are intended for use