Awọn ọna iṣelọpọ erogba irin pipe (1) paipu irin ti ko ni ailopin- awọn tubes yiyi gbona, awọn tube ti a fa tutu, tube extruded, tube oke, tube yiyi tutu (2) paipu irin welded (A) ni ibamu si ilana- arc welded pipes, ina resistance paipu welded (igbohunsafẹfẹ giga, igbohunsafẹfẹ kekere), paipu gaasi, weld ileru…
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