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This document specifies the minimum requirements for the materials, design, construction and performance testing of —    Type 2 hoop-wrapped composite tubes, —    Type 3 fully-wrapped composite tubes, and —    Type 4 fully-wrapped composite tubes with water capacities between 450 l and 3 000 l for storage and conveyance of compressed or liquefied gases with test pressures up to and including 1 600 bar[1] and a design life of at least 15 years. This document is applicable to expected service temperatures between -40 °C and +65 °C. NOTE       Type 4 tubes manufactured and tested to this document are not intended to contain toxic, oxidizing or corrosive gases. This document is applicable to tubes with composite reinforcement of carbon fibre or aramid fibre or glass fibre (or a mixture thereof) in a matrix.   [1] 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm2.