|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||285/021.1; 285/021.2; 285/368; 029/890.14|
|발명자 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 6 인용 특허 : 9|
A welded flange connection and methods and apparatus for producing the connection are disclosed. A weld insert is disposed between the flared ends of abutted plastic pipe or plastic-lined pipe sections. The weld insert includes an annular support disc having a resistance heating element disposed at least about the inner circumference of the disc. When held tightly between the flared ends of abutted pipe sections power can be applied to the heating element to produce sufficient heat to temporarily raise the temperature of the adjacent surfaces of the flar...
1. A method for producing a thermowelded connection between two pipe members, said pipe members including opposed flanges comprised of a melt processable thermoplastic material, comprising:positioning an annular weld insert between the plastic flanges of each of two opposing pipe sections, such that the weld insert is positioned between and against abutting surfaces of the flanges of the two opposed pipe members, said weld insert formed of a rigid material chemically compatible with the thermoplastic material of said flanges and having an inner and an ou...