ISA RP16.1,2,3 : 1959

1 Purpose
2 History and development
3 Scope
4 Uniform connection dimensions
5 Uniform nomenclature
6 Recommended safe working pressures
      6.1 Recommended safe working pressures of
             borosilicate glass tubes
      6.2 Recommended safe working pressures of metal
             tubes

Combines RP 16.1 - 10" (250 millimeter) scale length glass tube indicating variable area meters (rotameters) having horizontal outlet and inlet, either flanged or screwed construction; RP 16.2 - 5" (125 millimeter) scale length metal tube indicating variable area meters (rotameters) having bottom inlet and horizontal outlet of flanged construction; and RP 16.3 - 5" (125 millimeter) scale length glass tube extension type variable area meters (rotameters) having horizontal inlet and outlet, either flanged or screwed construction. Added auxiliary functions of the extension, for example pneumatic, indication and electrical transmission, local recording, alarm, etc is covered by RP 16.4.