DIFF Subgroup
G01M 3/20 using special tracer materials, e.g. dye, fluorescent material, radioactive material
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Investigating fluid tightness of structures > by using fluid or vacuum > by detecting the presence of fluid at the leakage point > using special tracer materials, e.g. dye, fluorescent material, radioactive material
CPC:
Investigating fluid-tightness of structures > by using fluid or vacuum > by detecting the presence of fluid at the leakage point > using special tracer materials, e.g. dye, fluorescent material, radioactive material
CPC subdivides this area 3x more granularly than IPC with 2 additional codes.
2 codes are CPC-only extensions.
1 shared codes have differing titles between IPC and CPC.
Child Classifications
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- G01M 3/22 for pipes, cables or tubes; for pipe joints or seals; for valves; +6 CPC IPC+CPC Available in IPC and CPC