This paper presents a procedure for how to relate fire performance of fibre reinforced polymer (FRP) composite structures to the fire safety regulations in SOLAS II-2. It can be used as basis when performing a fire risk assessment to demonstrate that the degree of safety is at least equivalent to that provided by prescriptive requirements. A key issue is that requirements and test methods are based on a use of steel structures, which requires seeking the safety level implied by the regulations. This was demonstrated for the regulations and introduced hazards affecting the growth stage of a fire. The safety implied by regulations was related to fire performance of FRP composite by reference to fire tests involving typical materials and some relevant safety measures. Ignition was described as uncritical whilst the fire growth on an FRP composite surface can be rapid. Flammability requirements are generally not achieved by an untreated panel but different means can be used for protection. A fire protective coating can be used to prevent ignition and sprinkler is effective both for fire prevention and extinguishment on interior and external surfaces. For interior spaces it can be relevant with a coating or thermal insulation also to hinder increased generation of smoke and toxic gases during fire evacuation. In total it is shown that fire hazards during the fire growth stage are manageable and a foundation is lain out for a well-structured fire risk assessment.