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      A106B,SA106B無縫鋼管,A106B無縫管,A106B無縫鋼管,A106B鋼管,-天津寶嶺鋼管貿易有限公司


      SA106B無縫管

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      1. 熱軋(擠壓無縫鋼管):圓管坯→加熱→穿孔→三輥斜軋、連軋或擠壓→脫管→定徑(或減徑)→冷卻→矯直→水壓試驗(或探傷)→標記→入庫   

        2.冷拔(軋)無縫鋼管:圓管坯→加熱→穿孔→打頭→退火→酸洗→涂油(鍍銅)→多道次冷拔(冷軋)→坯管→熱處理→矯直→水壓試驗(探傷)→標記→入庫

         




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      亚洲同性男GV网站SEARCH

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