A) Installation Volume
Checking saved installation volume…
B) Equipment Used
Select the equipment used. This sets the let-by fail threshold.
C) Let-by Check
Raise the pressure between 7 and 10 mbar for natural gas and LPG. Time for 1 minute.
Leave blank for guidance only. Enter readings to calculate pressure rise and support the let-by assessment.
D) Temperature Stabilisation
Natural gas: raise pressure between 20 and 21 mbar. LPG: raise pressure between 36 and 37 mbar.
Natural gas stabilisation: 1 minute. LPG stabilisation: 1 to 5 minutes.
E) Tightness Test
Continue for a further 2 minutes at the correct test pressure.
Enter the tightness test start and end readings to calculate the pressure drop and support assessment against current IGEM guidance.
F) Stopwatch
Use this to time the let-by, stabilisation or tightness test stage. You can still use your own stopwatch separately if preferred.
This tool is provided as a guide only and is intended to support qualified engineers in carrying out let-by, temperature stabilisation and tightness testing. It does not replace formal training, manufacturer instructions, or current IGEM standards. Results must be interpreted in line with the current procedure, manufacturer instructions and professional judgement. The user is responsible for ensuring all work is carried out in accordance with the latest regulations and safe working practices. No liability is accepted for any loss, damage or incorrect use arising from reliance on this tool.
Copyright © TomKat Gas Training Ltd. All rights reserved. This tool may not be copied, reproduced or distributed without permission.