1. Gas Infrastructure. Gas installation pipework with an operating pressure greater than 0, 5 bar for industrial installations and greater than 5 bar for industrial and non-industrial installations. Detailed functional requirements for design, materials, construction, inspection and testing Part 1, (7th March 2023) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (136 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗