A range of very fast curing thermosetting coating powders based on specially selected epoxy resins and hardeners. The powders have been formulated to meet the requirements of specifications for the external protection of underground steel pipelines, in particular for use as an anti-corrosion primer prior to the application of polyethylene coatings using the so-called "three-layer system". FP60 can also be applied in a layer thickness of up to 600 µm. FP60 in the color blue meets the requirements of BS 6920 for contact with drinking water (cold water and hot water up to 85°C).