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Priority to NL7212036ApriorityCriticalpatent/NL7212036A/xx
Publication of NL7212036ApublicationCriticalpatent/NL7212036A/xx
F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
F16L21/00—Joints with sleeve or socket
F16L21/002—Sleeves or nipples for pipes of the same diameter; Reduction pieces