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I-API 5L ngokuvamile ibhekisela epayipini lomugqa.
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I-ASTM A 53 imboza ipayipi lensimbi elingenamthungo nelishiselwe elinodonga oluwugqinsi.
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I-ASTM A106 GR.B ipayipi lensimbi engenamthungo iwuhlobo lwamapayipi ekhabhoni angenamthungo anengxenye engenalutho.
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ASTM JIS BS EN Standard Seamless Steel Pipe Steel Tubes
Ipayipi lensimbi elingenamthungo lenziwe ngensimbi eyindilinga enezimbobo, futhi amapayipi ensimbi angenawo umthungo wokushisela ngaphezulu abizwa ngokuthi amapayipi ensimbi angenamthungo.
