Extensions of classical phase field approaches to fracture are considered as a powerful framework to model hydrogen embrittlement in pipeline steels [1]. However, important gaps remain in the calibration of two key modelling features: the plastic degradation and the hydrogen-modified fracture properties. This work addresses these challenges through a systematic calibration strategy based on fracture test data. A critical modelling choice concerning plastic degradation is examined by comparing nominal and effective formulations [2]. The differences between both approaches are discussed in terms of their influence on the predicted fracture response and parameter identification, showing that the selected formulation affects the calibrated fracture properties, but also convergence and mesh dependence. The calibration of the critical energy release rate is analysed using fracture resistance curves, with particular emphasis on the extraction of phase field parameters from J-integral initiation values obtained from in-situ tests in high-pressure H2. The identification of the phase field length scale, or the associated strength, that better fits the experimental curves is also discussed. In addition, the incorporation of stress triaxiality and material anisotropy effects is briefly addressed, as these features are relevant for reproducing the fracture behaviour of pipeline steels under representative loading conditions. The reduction of fracture energy as a function of local hydrogen concentration is examined by contrasting mechanistic and phenomenological degradation functions, discussing the experimental limitations associated with their calibration. This work provides guidelines for the consistent calibration of ductile phase field models in the context of hydrogen-assisted fracture and contributes to their predictive capability for the structural integrity assessment of hydrogen-transporting pipelines.