0378406-A2 is referenced by 16 patents and cites 11 patents.

The improved electrofusion joint and header for supplying hot water that perform satisfactorily at elevated temperatures as evidenced by high heat resistance, that exhibit good sealing property and that can be handled efficiently in mounting and various other operations have a crosslinked thermoplastic resin layer and at least one joining portion which comprises a non-crosslinked thermoplastic resin layer that is formed as an integral part of said crosslinked thermoplastic resin layer in the area where it contacts a tubular member to be joined, and a heating electric wire provided either within or on the outer or inner surface of said non-crosslinked thermoplastic resin layer. Such electrofusion joint and header are applicable to any part of a piping system for supplying hot water and they will withstand use for a prolonged period.

Title
Electrofusion joint and hot water supply header using the same.
Application Number
EP19900300307 19900111
Publication Number
0378406 (A2)
Application Date
January 11, 1990
Publication Date
July 18, 1990
Inventor
Nakaoka Mikio Shinwa Sangyo Co
JP
Shibabuchi Toshio Shinwa Sangy
JP
Mito Kazunori Mitsui Petrochem
JP
Nagatani Fumio Mitsui Petroche
JP
Nishimura Hiroyuki Osaka Gas C
JP
Nakashiba Akio Osaka Gas Co Lt
JP
Assignee
Shinwa Sangyo
JP
Mitsui Petrochemical
JP
Osaka Gas
JP
IPC
F16L 47/02
F16L 41/03
B29L 31/24
B29L 31/18
B29C 65/34
F16L 47/02
F16L 47/00
B29C 65/34
B29C 65/00
F16L 47/28
F16L 47/03
B29C 65/34
B29C 65/00
View Original Source Download PDF