Bututun Karfe na ERW da aka welded
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ASNZS 1163 C250L0 ERW Bututun Karfe - Sashen Gine-gine Mai Rahusa Mai Ƙananan Zafi don Gina Yanayi Mai Sanyi
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ASNZS 1163 C250 ERW Bututun Karfe - Babban Manufofi Tsarin Rami don Gina Haske
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Bututun Karfe na API 5L X60 ERW – Bututun Layin Mai Ƙarfi Mai Girma don Ayyukan Bututun Mai Matsi Mai Girma
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Bututun Karfe na API 5L X52 ERW: Bututun Layin Mai Mai Ƙarfi Don Yaɗa Mai da Iskar Gas
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API 5L GR.B ERW Bututun Karfe – Bututun Layi Mai Inganci Don Yaɗa Mai, Gas & Ruwa
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ASTM A500 Pre-galvanized Square Karfe bututu
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Bututun Karfe Mai Zafi na BS 1387
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ASTM A795 Mai Zafi-Tushe Galvanized ERW Grooved Karfe Bututu
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ASTM A53 GR.B Bututun ƙarfe mai walƙiya mai zafi na galvanized