Hydrogen is becoming popular as a sustainable source of energy globally. The Australian government is currently funding millions of dollars in multiple projects to promote usage of Hydrogen. According to the Low Emissions Technology Statement of the Department of Industry, Science and Resources (DISR), Australia aims to reduce costs and develop innovative technologies to meet the government's goal of hydrogen production under $2/kg. Current pipeline infrastructure, which is mainly designed for transporting natural gas, has several limitations for hydrogen transport, such as: embrittlement and cracking of steel pipelines, performance evaluation and performance testing. Reinforced thermoplastic pipe (RTP) can be a solution due to its high chemical resistance, durability, flexibility and cost-effectiveness. The aim of this study is to provide recommendations for design of RTPs with variable fibre thicknesses and fibre orientations under different internal pressures. The proposed RTP consists of an inner high-density polyethylene (HDPE) pipe reinforced by glass fibre wrapping (GFRP), and then inserted into an outer HDPE pipe. [...]