ERW karfe bututu da aka kerarre ta low mita ko high mita juriya "juriya" .Su ne zagaye shambura welded daga karfe faranti tare da longitudinal welds.It da ake amfani da su safarar tururi-ruwa abubuwa kamar man fetur da kuma iskar gas, kuma zai iya saduwa daban-daban high da low matsa lamba bukatun. A halin yanzu, shi ya mamaye wani muhimmin matsayi a fagen sufuri bututu a duniya.
A lokacin walƙiya bututu na ERW, ana haifar da zafi lokacin da wutar lantarki ke gudana ta cikin wuraren tuntuɓar yanki na welded.Yana zafi da gefuna biyu na karfe har zuwa inda gefe ɗaya zai iya samar da haɗin gwiwa.
Yawanci bututun ERW yana da matsakaicin OD na 24” (609mm), don girman girman bututun za a ƙirƙira shi a cikin SAW.
Akwai bututu da yawa da za a iya yi ta hanyar ERW. A ƙasa mun lissafa mafi yawan ma'auni a cikin aikin famfo.
ERW ASTM A53 Grade A da B (da galvanized) Carbon Karfe bututu ASTM A252 Pile bututu ASTM A500 Tsarin bututu ASTM A134 da ASTM A135 bututu EN 10219 S275, S355 bututu
Bakin Karfe ERW bututu / bututu Standards da Bayani dalla-dallaASTM A269 Bakin Karfe bututu ASTM A270 Sanitary bututu ASTM A312 Bakin Karfe bututu ASTM A790 Ferritic/Austenitic/ Duplex Bakin Karfe bututu
API ERW Line bututu API 5L B zuwa X70 PSL1 (PSL2 ya kamata ya kasance cikin tsarin HFW) API 5CT J55/K55, N80 casing da tubing
Aikace-aikace da amfani da bututun ƙarfe na ERW: Ana amfani da bututun ƙarfe na ERW don jigilar iskar gas da abubuwa masu ruwa kamar man fetur da gas, kuma yana iya saduwa da buƙatun ƙananan matsa lamba da matsa lamba.