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About This Item
Full Description
NOTE 1 Steel casings can be used for mechanical protection of pipelines at crossings, such as at roads and railways and the installation of a casing at a highway, railway, or other crossing can be required by the permitting agency or pipeline operator.
NOTE 2 This document does not imply that utilization of casings is mandatory or necessary.
NOTE 3 This document does not imply that cased crossings, whether electrically isolated or electrically shorted, contribute to corrosion of a carrier pipe within a cased crossing. However, cased crossings can adversely affect the integrity of the carrier pipe by shielding cathodic protection (CP) current to the carrier pipe or reducing the CP effectiveness on the carrier pipe in the vicinity of the casing. Their use is not recommended unless required by load considerations, unstable soil conditions, or when their use is dictated by sound engineering practices.
Cross References:
ISO 15589-1
EN 12954
ISO 13623
ISO 13847
ASTM D937
ASTM D938
EN 15257
NACE/SP 0169
NACE/SP 0200
NACE/SP 0286
NACE/SP 0274
NACE/SP 0490
1272/2008/EC
NACE 10A192
All current amendments available at time of purchase are included with the purchase of this document.