shearwelder theshearwelderisakeyunitinthelongitudinallyweldedpipemillline,itisusedtoparallellycutthetailofthestripwhichhasjustgoneintotheaccumulatorandtheheadofthestripcoiingoutoftheuncoiler,andthenweldthemtogether. Ithavethreetype:automatictype,semi-automatictypeandmanualcontroltype. keywords:shearwelder,pipemillline,pipe,weldedpipeline.