Wannan ƙayyadaddun shine don samar da daidaitattun masana'antu don tsarin bututun don isar da ruwa, gas da mai a cikin masana'antar mai da iskar gas.
Akwai matakan ƙayyadaddun samfur guda biyu, PSL 1 da PSL 2, PSL 2 yana da buƙatu na wajibi don daidai da carbon, ƙarfin daraja, matsakaicin ƙarfin samar da ƙarfi da ƙarfi.
Darasi B, X42, X46, X52, X56, X60, X65, X70 da X80.
Cangzhou Karfe Karfe bututu Group co., Ltd kayayyaki SAWH bututu rufe sa daga API B zuwa X70, mun sami API 5L takardar shaidar shekaru da kuma yanzu mu line bututu da yadu amfani da CNPC, CPECC ga bututun ayyukan.