ITA'S COMPRESSED AIR GUIDELINES COMPLETED

摘要

The ITA's Working Group for Health and Safety has finalised its compressed air guidelines. Originally identified as an objective at the World Tunnel Congress in Vancouver in 2010, Working Group Five (WG5) defined this as "work in compressed air at pressures above historical statutory limits." In most countries these limits are between three and four bar (gauge) and involve the use of breathing mixtures other than compressed natural air and can involve the use of saturation techniques. A British Tunnelling Society (BTS) working group had earlier identified a "significant development in the use of compressed air for which no guidance existed," stated WG5.