The

ISO ISO is the most common abbreviation for the International Organization for Standardization. ISO or Iso may also refer to: Business and finance * Iso (supermarket), a chain of Danish supermarkets incorporated into the SuperBest chain in 2007 * Iso ...

-standard ISO 15398 regulates the minimum requirements, proofs of suitability and auditing standards for

manhole cover A manhole cover or maintenance hole cover is a removable plate forming the lid over the opening of a manhole, an opening large enough for a person to pass through that is used as an access point for an underground vault or pipe. It is designed t ...

s made of

thermoplastic A thermoplastic, or thermosoft plastic, is any plastic polymer material that becomes pliable or moldable at a certain elevated temperature and solidifies upon cooling. Most thermoplastics have a high molecular weight. The polymer chains associate ...

s. The complete title of the norm is ''Specification for thermoplastics covers and frames for manholes and inspection chambers used in non-traffic areas''. Issue date: 1. December 2012. The norm is in English. The constraint "non-traffic areas" is also the crucial difference to the general European Standard for manhole covers EN124, which is only for vehicular access areas. Plastic-manhole covers according to ISO 15398 are designated for the commitment on control- and inspection chambers in pedestrian (class A 15) and light vehicular areas (max. class B 125). Moreover, only manhole covers made of thermoplastics and with a maximum of DN 600 are regulated. The pressure-/load proofs of the EN 124:1994 are the foundation of the proofs of suitability, which the ISO 15398 pretends. Additional to this you have to render comprehensive material specific proofs - e.g. impact resistance, cold-climate-crack-test, UV-resistance of the introduced plastics. Also safety features like surface condition,

skid resistance Road slipperiness is a condition of low skid resistance due to insufficient road friction. It is a result of snow, ice, water, loose material and the texture of the road surface on the traction produced by the wheels of a vehicle. Road slipperi ...

and the accuracy of fit are defined.

References

http://www.iso.org/iso/catalogue_detail.htm?csnumber=55427 {{ISO standards #15398 Thermoplastics