1. BS ISO 9809-4. Gas cylinders. Refillable seamless steel gas cylinders. Design, construction and testing. Part 4. Stainless steel cylinders with an Rm value of less than 1 100 MPa (9th September 2020) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (62 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗