【正文】 into piping system during the process of cleansing and installation, as well as enabling lubricant in the system up to （ NAS 8 level), ensuring onetime successful pletion of oil flushing process and utility test for lubricating oil system. This oil flushing process is a pretreatment work prior to main engine or equipment which will be connected to piping system, oil reflushing process is made again before the connected equipment is officially operated. 四、 化學(xué)清洗、油沖洗的范圍及清洗方式 四 . Scopes of chemical cleaning, oil flushing as well as flushing method 本次化學(xué)清洗的范圍是：吉寶 035 號(hào)、 5000T 浮動(dòng)式起重工程船一條 包括 潤(rùn)滑油系統(tǒng)（主機(jī)日用潤(rùn) 滑油管路系統(tǒng)，螺旋槳滑油系統(tǒng)，舵機(jī)滑油管路系統(tǒng)，艏側(cè)推器潤(rùn)滑油管路系統(tǒng)） 淡水冷卻系統(tǒng)管路 燃油輸送系統(tǒng)， 燃油供給系統(tǒng)的化學(xué)清洗鈍化防銹， 液壓油管道系統(tǒng)。 This chemical cleaning process includes: 5000T JIBAO035 floating hoist engineer vessel, oil system(lubricating piping systems of everyday use on the main engine, propeller, steering engine, bow thruster) 2. Piping of fresh water cooling system 3. Fuel conveying system, 4. Chemical cleaning and passivation effects of Fuel feed system, 5. Hydraulic oil piping system is flushed with oil. 本次化學(xué)清洗采用循環(huán)加浸泡相結(jié)合清洗方式?？杉涌祛A(yù)膜劑 的擴(kuò)散速度，有利于電層積過(guò)程，因此有利于成膜，使成膜快、質(zhì)量好。 This oil flushing process is done by using external oil pump (original oil pump is remended) to circulate the oil, oil return piping system is externally connected to 2nd class removable pipe filter. The highest precision of this filter: 5μ。25 piping system:3μ。 pressure kept at:. 五、藥劑的選擇 五 . Chemical agent 本次清洗藥劑為三合一脫脂除銹防銹清洗劑；該清洗藥劑為清洗劑，清洗液 PH值 及中性狀態(tài)完成清洗，對(duì)金屬、橡膠等無(wú)任何腐蝕，使用安全本品按比例加入清洗液即可，任何人都能操作；使用方便除油、除銹、防銹一次通過(guò)，無(wú)需繁瑣的中和除油除銹鈍化程序；無(wú)毒無(wú)害無(wú)污染清洗液可以直接排放。 this chemical cleaning agent is a type of cleaning agent。 convenient for use, degreasing, rust cleaning and rustproof functions can be simultaneously achieved without the degreasing, rust cleaning and passivation processes under the trivial neutralization reaction. No toxicity, no hazard ands no pollution, it can be directly discharged. 本次油沖洗采用的是：潤(rùn)滑油管系是道達(dá)爾牌專用沖洗油，燃油管系使用輕質(zhì)柴油作為油沖洗用油。 light diesel oil can be used as flushing oil for fuel piping system. 六、 化學(xué)清洗前的準(zhǔn)備工作。 Utilize external circulating system for circulation cleaning process。 按乙方施工要求，由甲方將循環(huán)回路與設(shè)備無(wú)關(guān)的部位隔離。兩臺(tái)， 65m179。: two sets, 65m179。 and 1 m179。兩臺(tái) 根據(jù)管徑確定流量和壓力 Special Oil flushing equipment two sets rate of flow: 65m179。 Prepump filter, oil return double precision filter Equipped with filter element 管道短接 提供法蘭及接頭等工裝。 Relevant flushing oil at work as well as light diesel oil 三合一螯合清洗劑 Threeinone chelating cleaner 鈍化防銹劑 Passivating antirust agent 清管球配套 Equipped with spherical pigs 七、 化學(xué)清洗、油沖洗的步驟 七 . Procedures of chemical cleaning, oil flushing 本次化學(xué)清洗程序如下： The chemical cleaning procedure is shown as follows: 循環(huán)系統(tǒng) 連接及試壓 → 水沖洗 → 脫脂除銹清洗 → 防銹鈍化處理→ 吹掃通球 → 連接串油設(shè)備 → 油沖洗 → 驗(yàn)收復(fù)位。該程序需 23 小時(shí)。 The required piping system is filled with washing water before flushing pump is opened。 open exhaust valve for inspection of elbow and overhead pipes if they are filled with fluid。為預(yù)膜打好基礎(chǔ)。清洗時(shí)間 2448 小時(shí)。 It is intended for removal of oil impurities and oxidized rust deposit which is difficult to be eliminated during the water flushing process, enabling the metal to expose its active surface, which it paves the way for prefilming process. According to the requirement of budgeting, threeinone cleaning agent is added into the system by several times, PH value or Fe2+ can be measured once every 20min. The flushing process is pleted after changes of PH value and Fe2+ concentration id determined. Flushing time: 2448 hours. A large volume of drainage water can be discharged, with fresh water supplemented after pletion of flushing process. We can take next step after turbidity degree is decreased up to 10NTU below. 主劑 Primary chemical agent 有機(jī)螯合劑、分散劑、滲透劑、表面活性劑等成分組成； Organic chelating agent, dispersing agent, perant, surface active agent and other ingredients。 Defoamer: highmolecule perant。 Standard corrosion carbon steel coupon 、工藝條件 Process conditions 溫度 常溫 Temperature: normal temperature 流速 1m/s Flow rate: 1m/s 時(shí)間 1224 小 時(shí) Time: 1224 hours 、防銹鈍化處理 Antirust, passivation 因考慮清洗后管道無(wú)法立即投入使用，防止因停放時(shí)間過(guò)長(zhǎng)引起管道返銹的問(wèn)題出現(xiàn)，有效延長(zhǎng)管道返銹時(shí)間。 Considering that the flushed piping system cannot be operated at once and to prevent rerusting in the piping system after it cannot be used for a long time, this treatment can be utilized to effectively prolong the rerusting time. Therefore, antirust and passivating process should be immediately performed af