Pipe e otlolohileng ea seam welded (ERW) ke sejana se chesang se kolobisitsoeng se entsoeng ke mochini oa ho etsa, se sebelisang phello ea letlalo le phello e haufi ea maqhubu a phahameng a hona joale ho futhumatsa le ho qhibilihisa moeli oa tube e se nang letho, le ho cheselletsa khatello tlas'a ts'ebetso ea the squeeze roller/ Ho fihlella tlhahiso.Mokhoa o phahameng oa ho hanyetsa mokhoa oa ho cheselletsa o ile oa sebelisoa ho hlahisa liphaephe tse cheselitsoeng lilemong tsa bo-1950.Lilemong tse leshome tse fetileng, theknoloji ea tlhahiso ea eona e fetohile e phethahetseng le ho feta, 'me boleng ba sehlahisoa bo ntse bo ntlafatsoa ka ho tsoelang pele.Ea pele ke hore boleng ba thepa e tala e sebelisoang tlhahisong ea ERW bo ntlafalitsoe haholo.

Taba ea bobeli, taolo ea othomathike ea komporo e lemohuoa ts'ebetsong ea tlhahiso ea phala e kholo le e mahareng ea ERW ea tšepe e etsang tjheseletsa kalafo ea mocheso, 'me matla a kenang mocheso nakong ea ts'ebetso ea maqhubu a holimo a laoloa ka nepo le sistimi ea puseletso e ikemetseng ea komporo, ho thibela matla a ho kenya mocheso oa welding hore a se be tlase Ho cheseha ho batang ho bakoang ke ho chesoa, ho tjheseletsa ho hoholo ho bakoang ke matla a matla a ho kenya mocheso.