ISO 8449:1986 Pipework; Single overlap flexible metal hoses (abestos packing, limited tightness, circular or polygonal section, in protected carbon steel)
1995ISO 8449:1995 Pipework - Single overlap flexible metal hoses (with packing, limited tightness, circular or polygonal section, in protected carbon steel)
1986ISO 8449:1986 Pipework; Single overlap flexible metal hoses (abestos packing, limited tightness, circular or polygonal section, in protected carbon steel)