This practical checklist guides operatives through testing and purging medium pressure gas services up to 63 mm. Steps include fitting test equipment, introducing air, conducting a 3 bar test to current SGN procedures with five minutes at no pressure loss, and checking exposed joints with approved leak detection fluid. It covers safe purging to atmosphere, communication between operatives, commissioning for PE or metallic connections, confirming purge completion, checking SEFV operation, repressurising, capping and leak checks, recording results, and sign off.
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