481. Tracked Changes. Specification and qualification of welding procedures for metallic materials. Welding procedure test. Upset (resistance butt) and flash welding Part 13, (26th May 2022) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (64 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
482. Tracked Changes. Vitreous and porcelain enamels. Release from enamelled articles in contact with food. Methods of test and limits. (31st May 2022) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (40 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
483. Unplasticized polyvinyl chloride (PVC-U) rainwater goods and accessories. Half-round gutters and circular pipe Part 1, (1st February 1971) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (33 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
484. Vitreous and porcelain enamels. Release from enamelled articles in contact with food. Methods of test and limits. (26th May 2022) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (20 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗