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Hot rolled black seamless steel pipe API 5CT steel casing pipe, US $ 1000 - 1000 / Tonne, API, API 5CT, API certificate, API J55-API P110, API J55, API K55, API L80, API P110, 5 - 22 mm.Source from Yantai Sanmon Machinery Equipments Co., Ltd. on Waimaotong.com.