ISO 4641:2010 specifies the minimum requirements for textile-reinforced, smooth-bore rubber water-suction and discharge hoses and hose assemblies. Three types of hoses and hose assemblies are specified according to their operating duty requirements, i.e. their ambient and water temperature ranges: ambient temperatures: -25 �C to +70 �C; water temperatures during operation: 0 �C to +70 �C.