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3.1.1 The design pressure range of fibre reinforced plastics equipment shall be in accordance with the following requirements：
1 Where the diameter is less than or equal to 4m，the design internal pressure shall not be larger than 1.0MPa，and the product of the design internal pressure and diameter shall not be larger than 2.4MPa·m，and the design external pressure shall not be larger than 0.1MPa；
2 Where the diameter is larger than 4m，the design internal pressure shall not be larger than 2.0kPa，and the design external pressure shall not be larger than 0.5kPa.
3.1.2 The design pressure range of fibre reinforced plastic piping shall be in accordance with the following requirements：
1 Where the diameter is less than or equal to 600mm，the design internal pressure shall not be larger than 1.0MPa；
2 Where the diameter is larger than 600mm and less than or equal to 1200mm，the design internal pressure shall not be larger than 0.6MPa；
3 External pressure shall not be larger than 0.1MPa.
3.1.3 When the design pressure and diameter of fibre reinforced plastics equipment and piping do not conform to the scope stipulated in Articles 3.1.1 and 3.1.2 of this code，the material properties shall be determined by testing.
3.1.4 The design temperature range of fibre reinforced plastic equipment should be-40℃ to+120℃，and the design temperature range of piping should be-30℃ to+110℃.When the temperature range is not satisfied，the performance of the material shall be determined by testing.