ILI HYRER/HYREL

The purpose of the project is In-Line Inspection (ILI) for pipeline technical condition assessment prior to the transition from natural gas (NG) to hydrogen operation. For the pipeline sections 1 to 3 mechanical cleaning using i.e. bi-directional cleaning pigs is considered. Four (4) cleaning pig runs shall be assumed to be required per pipeline section. For the very first cleaning pig run per section a bi-directional pig must be offered which shall proof pig passage by either mechanical or intelligent gauge plate(s). For the pipeline sections 1 to 3 mapping of the pipeline is considered over the entire section or a to be determined sub-section of it. A minimum of twenty (20) AGMs must be provided per section. Inertial measurement data are considered for bending strain analysis which shall be offered as a combined service. For the pipeline sections 1 to 3 the following pipeline anomalies shall be addressed by ILI technologies: Offered services shall consider internal and external metal-loss detection and sizing in straight pipe, field- and hot-bends. In case a combination of ILI technologies implemented on one or more ILI tools which enable a combined data analysis leading to a superior perfor-mance compared to individual ILI technologies, the technologies shall be offered as a com-bined service and shall be emphasized as such. Offered services shall consider detection and sizing of geometric deviations from the norm of straight pipe and in bends. Offered services shall consider detection and sizing of axially oriented crack and crack-like anomalies. The definition of terms is according to the publicly available Pipeline Operators Forum Recommended Practice POF 100 edition 2021.