the filament winding process). These are related to the loads of the design, such as the internal pressure and strain. BS EN 13121 This European standard replaces BS4994-87 which is marked now as Current, Obsolescent, Superseded. SS245:1995 This is the Singapore Standard for sectional GRP water tank, which is current. Manufactures Mitsubishi Chemical Infratec See also BS EN 13121-3 BS 4994 References Example of a GRP Sectional tank. https://www.mechgroup.co.uk/grp-sectional-tanks Example of GRP Cylindrical tanks. https://www.mechgroup.co.uk/grp-cylindrical-tanks Further reading — a case study of the design process of a cylindrical vessel, using the BS 4994 methodology FRP Tanks and Vessels manufacturing — GRP Tank Covers: How to meet regulatory requirements in a cost-effective way Storage tanks Sewerage Containers Scrubbers