UNDERGROUND LPG STORAGE TANKS UNDER GROUND LPG STORAGE TANKS Underground storage tanks are manufactured in standard volumes from 490l to 10000l in diameter of Ø1250mm, Custom sizes with diameters of Ø2000mm possible on request and requirements of the customer. Previous Next Max operating pressure 15.6 bar, other common pressures 12.1 bar Test pressure: 22.3 bar, or according to the required working pressure Operating temperature: -20°C to +40°C (standard), other common temperature ranges from min. -20°C to max. +30°C Medium: Liquefied gas DIN 51622 / EN 589 Construction code: AD-Merkblatt 2000 Protective coating: Sand blasted SA 2 ½ , epoxy anticorrosive coating 1000µm, according to DIN 4681/3, ISO test 25kV