NF EN ISO 16440:2018

Scope This document specifies requirements for the corrosion protection, design, manufacture, installation and maintenance of steel pipe conduits for pipeline transportation systems of the oil and gas industries. in accordance with ISO 13623. NOTE 1 Steel sleeves can be used to protect lines at crossings, for example roads and railways. The installation of ducts on a motorway, a railway or any other crossing may be required by the validation agency or the pipeline operator. NOTE 2 This document does not purport to claim that the use of ducts is mandatory or necessary. NOTE 3 This document does not claim that bushings, they are insulated or short-circuited electrically, promote the corrosion of a transport pipe with duct crossing. In contrast, duct bushings can affect the integrity of the transport pipe by shielding the current of the cathodic protection (PC) of the transport pipe or by reducing the effectiveness of the cathodic protection on the transport pipe. near the sheath. Their use is not recommended unless load conditions, terrain instability or good engineering practice require it. integrity of the transport pipe by shielding the current of the cathodic protection (PC) of the transport pipe or reducing the effectiveness of the cathodic protection on the transport pipe near the sheath. Their use is not recommended unless load conditions, terrain instability or good engineering practice require it. integrity of the transport pipe by shielding the current of the cathodic protection (PC) of the transport pipe or reducing the effectiveness of the cathodic protection on the transport pipe near the sheath. Their use is not recommended unless load conditions, terrain instability or good engineering practice require it.