ISO DIS 18211

Description / Abstract: This International Standard specifies a method for long range testing of carbon and low alloy steel above ground pipelines and plant piping using guided ultrasonic waves with axial propagation applied on the entire circumferential pipe section, in order to detect corrosion or erosion damage.

The Guided Wave Testing (GWT) technique allows for fast inspection of above ground pipelines, plant piping and cased road crossings, giving a qualitative screening and localization of probable corroded and eroded areas. GWT is typically performed on operating piping systems.

This International Standard can be applied to the following types of pipes:

a) above ground painted pipelines;

b) above ground insulated pipelines;

c) pipe sections within road crossings with external casing (without bitumen or plastic coating);

d) painted plant piping;

e) insulated plant piping.

Other types of pipes not included in the above list need dedicated approaches due to increased complexity.