3/12/2023 0 Comments Bs 6755 part 1 download![]() ![]() When equipment such as volume loss devices or digital pressure indicators are used, the manufacturer shall be capable of demonstrating the equivalence of the test system with the requirements of this Part of BS 6755. NOTE- Guidance on measurement and calibration systems can be found in BS 5781-1 and BS 5781-2. Pressure gauges shall be checked for calibration and adjusted if necessary at intervals not exceeding 6 months and the results shall be recorded. ![]() The test apparatus shall be of such a design that it does not subject the valve to externally applied stress affecting the results of the testsĭ.1.2.1 Industrial pressure gauges, complying with the requirements for accuracy of BS 1780 and having a full scale reading of not more than 4 times and not less than 1.5 times the test pressure. Threaded end valves can also be PN rated. ![]() NOTE- For Class rated valves above size 24, the nominal bore size of the valve should be converted into millimetres and this value should be used instead of “DN” when calculating leakage rates in Table 1 and Table 2.
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