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API 5L Bututu Bututun Karfe Ba Su Juya Ba
API 5L gabaɗaya yana nufin bututun layi.
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ASTM A53 Welded and Seamless Karfe Bututu Bututun Karfe
ASTM A 53 yana rufe bututun ƙarfe maras sumul da welded tare da kaurin bango mara ƙima.
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ASTM A106 Gr.B Bututu Karfe Karfe mara kyau
ASTM A106 GR.B carbon ba tare da sumul karfe bututu ne wani nau'i na carbon sumul bututu tare da m sashe.
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ASTM JIS BS EN Standard Bututu Karfe Karfe
Ana yin bututun ƙarfe mara ƙarfi da ɓarna baki ɗaya, kuma bututun ƙarfe ba tare da walƙiya a saman ba ana kiran bututun ƙarfe mara ƙarfi.
