EP 0102407 B1 19860219 - FINNED TUBE WITH INTERNAL PROJECTIONS AND METHOD AND APPARATUS FOR ITS MANUFACTURE
Title (en)
FINNED TUBE WITH INTERNAL PROJECTIONS AND METHOD AND APPARATUS FOR ITS MANUFACTURE
Publication
Application
Priority
EP 82108141 A 19820903
Abstract (en)
[origin: EP0102407A1] 1. An integral finned tube (1), particularly for heat exchangers and the like, having fins (2) running in a single or multiple threaded and helical fashion around the circumference of the tube and having tube wall material displaced radially to the inside of the tube to form projections (5), said material being arranged according to groove (3) located between fins (2) and also running in a helical fashion, said helix or helixes of the displaced tube wall material having the same pitch as said helix or helixes of the fins (2) running around the circumference of the tube, wherein projections (5) extend over part of the helix or helixes only.
IPC 1-7
IPC 8 full level
B21C 37/20 (2006.01); B21D 15/04 (2006.01); F28F 1/36 (2006.01); F28F 1/42 (2006.01)
CPC (source: EP)
B21C 37/207 (2013.01); B21D 15/04 (2013.01); F28F 1/36 (2013.01); F28F 1/42 (2013.01); F28F 1/422 (2013.01)
Designated contracting state (EPC)
DE FR GB SE
DOCDB simple family (publication)
EP 0102407 A1 19840314; EP 0102407 B1 19860219; DE 3269190 D1 19860327
DOCDB simple family (application)
EP 82108141 A 19820903; DE 3269190 T 19820903