GB Gas Tightness Testing

GBNG Tightness Test 2026 Carry out natural gas tightness testing with confidence using this step-by-step guide based on the latest IGEM/UP/1B Edition 4 (2026) guidance. Designed for gas engineers, apprentices and training centres, the app guides you through each stage of the testing procedure, helping you follow the correct sequence and understand the decisions required during testing. Features • Guided Let-by Test • Guided Stabilisation Test • Guided Tightness Test • Pipework-only retest guidance for existing installations • Standing Pressure assessment • Working Pressure assessment • Maximum Load Pressure assessment • Automatic installation volume calculator when required • Automatic 2026 permissible pressure loss calculations • Automatic pass/fail guidance • Stage-specific troubleshooting advice • Professional PDF test report • Built-in stopwatch and test timers • Clear manometer illustrations throughout • Designed for use on-site or in the classroom The app helps engineers understand what to do if a test fails, including guidance for: • Let-by failures • Stabilisation failures • Tightness test failures • Pressure regulator checks • Existing and new installations • Installation volume assessment where required Pressure readings are recorded during the test and included in a professional PDF report that can be saved, printed or shared. Whether you're an experienced gas engineer, an apprentice learning tightness testing or an assessor supporting candidates, GBNG Tightness Test 2026 provides a simple, logical and professional approach to one of the most important gas safety procedures. Developed by GB-GAS – Practical apps for gas engineers.