IGEM/SR/15 Edition 5 +A: 2015 - Integrity of safety-related systems in the gas industry - Digital (1 year)
IGEM/SR/15 Edition 5 +A: 2015 - Integrity of safety-related systems in the gas industry - Digital (3 year)
IGEM/SR/22 - Purging operations for fuel gases in transmission, distribution and storage - Digital (1 year)
IGEM/SR/18 Edition 3 - Safe working practices to ensure the integrity of gas pipelines and associated installations - Hard copy