DIFF Main Group
F28F 1/00 Tubular elements; Assemblies of tubular elements (specially adapted for movement F28F5/00)
Introduced: September 1968
Title
Titles differ between systems:
IPC: Tubular elements; Assemblies of tubular elements
CPC: Tubular elements; Assemblies of tubular elements (specially adapted for movement F28F5/00)
Full Title
Full titles differ between systems:
IPC:
Tubular elements; Assemblies of tubular elements
CPC:
Tubular elements; Assemblies of tubular elements (specially adapted for movement F28F5/00)
Of 5 combined children, 3 exist in both systems.
2 codes are CPC-only extensions.
2 shared codes have differing titles between IPC and CPC.
Child Classifications
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- F28F 1/02 Tubular elements of cross-section which is non-circular (F28F1/08, F28F1/10 take precedence) +3 CPC IPC+CPC Available in IPC and CPC
- F28F 1/08 Tubular elements crimped or corrugated in longitudinal section IPC+CPC Available in IPC and CPC
- F28F 1/10 Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses (crimped or corrugated elements F28F1/06, F28F1/08) +1 CPC IPC+CPC Available in IPC and CPC