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世界上最大規(guī)格（外徑Φ1088mm、內(nèi)徑Φ900mm）的核島一回路鍛造主管道

——2023年重型機械世界之最科技成果獲獎項目專題報道

項目名稱：國和一號、華龍一號核電主管道研制關(guān)鍵技術(shù)及應(yīng)用

研制單位： 二重（德陽）重型裝備有限公司  www.erzhongheavy.com

首次投運時間：2021年6月

聯(lián)系人 ：陳聰，13708103955，365654942@qq.com

國和一號、華龍一號主管道均采用直管與彎頭、管嘴與管道整體鍛件結(jié)構(gòu)，是目前世界范圍尺寸最大（交貨最大外徑Φ1100mm）、重量最大（固溶熱處理最大重量24噸、交貨重量最大17噸）、技術(shù)要求最高（橢圓度≤4%、一體化管嘴位置尺寸±1.5mm、晶粒度≥2.0級）、制造難度最大的核島一回路鍛造主管道。

二重裝備在完全自主創(chuàng)新的基礎(chǔ)上形成系統(tǒng)的鍛造主管道制造技術(shù)，解決了我國三代核電自主化的“卡脖子”難題，使我國三代核電鍛造主管道綜合制造技術(shù)提高到國際領(lǐng)先水平，解決了國和一號示范工程、華龍一號示范工程、“一帶一路”卡拉奇項目對主管道的急需，為我國重大技術(shù)裝備國產(chǎn)化、三代核電技術(shù)的完全自主化和雙碳目標做出了重要貢獻。

The world 's largest size of forged main pipeline for nuclear island primary circuit (  the outer diameter is 1100 mm and the inner diameter is 900 mm ).

Development and Application of Key Technologies for Nuclear Power Main Piping of Guohe One and HPR1000

Erzhong (Deyang) Heavy Equipment Co.,Ltd. www.erzhongheavy.com

Main pipings of Guohe One and HPR1000 with integral forging structures for straight pipes and elbows，nozzles and pipes，are currently the largest in the world (with the maximum outer diameter Φ 1100mm)，the largest in weight (24 tons for solid solution heat treatment，17 tons for delivery)， the highest in technical requirements (ovality ≤ 4%， integrated nozzle position size ± 1.5mm, grain size ≥ 2.0)，and the most difficult to forged main piping manufacture of nuclear island primary circuit.

On the basis of full independent innovation, Erzhong (Deyang) heavy equipment Co.,Ltd. has formed systematic manufacturing technology for forged main pipings, which has solved " bottle-neck " problem of generation Ⅲ nuclear power localization, raised comprehensive manufacturing technology for forged main piping of generation Ⅲ nuclear power to international leading level, and solved urgent need for main pipings of Guohe one demonstration project, HPR1000 demonstration project, "the Belt and Road" Karachi Project. Significant contributions have been made to localization of major technological equipment, complete autonomy of generation Ⅲ nuclear power technology, and dual carbon goal.