大直徑特厚壁NV E550海洋鉆井平臺(tái)樁腿支撐管的研發(fā)

R&D of NV E550 Large-sized, Extra-heavy-wall Steel Pipe for Supporting Offshore Drilling Platform Pile Column

摘要: 針對(duì)鉆井平臺(tái)樁腿支撐用管的服役條件及特點(diǎn)，從化學(xué)成分設(shè)計(jì)、冶煉工藝、軋制工藝、熱處理工藝和配套的焊接工藝等方面進(jìn)行研究，成功開發(fā)出滿足DNV-OS-B101規(guī)范的Ф355.6 mm×65 mm規(guī)格大直徑特厚壁NV E550無縫鋼管。檢驗(yàn)結(jié)果表明：該無縫鋼管具有高強(qiáng)度和優(yōu)良的低溫沖擊韌性，性能組織均勻，可焊性良好，完全滿足用戶的設(shè)計(jì)和使用要求，并通過了DNV挪威船級(jí)社認(rèn)證。

Abstract: Aiming at the service conditions and ch aracteristics of the pipe for supporting offshore drilling platform pile column, theФ355.6 mm×65 mm large-sized, extra-heavy-wall NV E550 seamless steel pipe as per Specification DNV-OS-B101 is developed successfully by means of researches concerning relevant design of chemical composition, melting process, rolling process, heat treatment process and applicable welding process, etc.Relevant test results show that the said pipe is in possession of high strength and excellent low-temperature impact toughness, homogeneous microstructure, and good weldability, having been satisfactory to the customized requirements for design and application.The pipe as developed has been DNV-certisfied.