1、儀表設(shè)備管路脫脂方案Degreasing Plan Of Conduits of I.E1、編制說明：脫脂是一項施工工藝簡單，施工環(huán)境、工藝紀律、施工質(zhì)量要求嚴格的工序，它的工作質(zhì)量將直接影響生產(chǎn)安全和產(chǎn)品質(zhì)量。為了確保脫脂的工作質(zhì)量，特編制本方案。2、編制依據(jù)：、工程施工承包合同或協(xié)議。、設(shè)計施工圖及其它設(shè)計文件。、施工組織設(shè)計及公司質(zhì)量體系文件。、國家現(xiàn)行工業(yè)自動化儀表工程施工及驗收標準及其驗評標準。、國家現(xiàn)行脫脂工程施工及驗收標準和驗評標準。、現(xiàn)行工業(yè)“三廢”排放標準3、工程概況：工程概況應(yīng)包括：工程名稱、地點、范圍、規(guī)模特點、主要實物工程量、工期要求及投資等方面的內(nèi)容。附：脫脂實物工程

2、量表。序號脫脂項目單位數(shù)量備注1儀表設(shè)備臺/件2管子m3管件件4閥門個4、一般規(guī)定：General Regulations:、儀表設(shè)備、管子、閥門、管件等，凡設(shè)計文件要求脫脂或具以下狀況之一時， 必需進展脫脂。When design requires grease removal or they have one of the following conditions,instrument equipments pipes valves, and pipecomponents shall be degreased.a、輸送、貯存的物料遇油脂等有機物可能發(fā)生燃燒或爆炸者。Probably exi

3、sting combustion or explosion when conveying or storage materials meetgrease.b、油脂等有機物能與輸送、貯存的物料相混合并能轉(zhuǎn)變物料的使用特性者。Organism such as grease may mix with conveying and storing material and change usageactivity of material.c、油脂等有機物對觸媒的活性有影響者。Organism such as grease affects the activity of accelerant.d、油脂等有

4、機物對產(chǎn)品純度有影響者Organism such as grease affects product purity.e、由于酸洗，需進展脫脂處理者。 Need degreasing due to acidwashing.、已由制造廠脫脂合格并密封的設(shè)備，安裝時可不再脫脂，但在安裝前應(yīng)經(jīng)質(zhì)檢人員檢查確認，假設(shè)覺察污物或被油脂污染，則應(yīng)重進展脫脂。To equipments degreased and sealed by manufacture, need not to be degreasedduring installation, however, they shall be checked

5、and approved by quality checker.If find pollution material or grease pollution, degreasing once again.、儀表設(shè)備、管子、管件、閥門等的脫脂應(yīng)在安裝前完成。Finishing degreasing of in. E, pipes, pipe components and valve, prior to installation.、承受堿性脫脂液脫脂時，脫脂溫度在 6090之間進展，對于一般鋼制件，浸入脫脂的溫度不能低于 80，噴洗脫脂的溫度不宜低于 60。對于有色金屬一般在7080之間脫脂，并要

6、求常加攪拌。Temperature of grease removal is 6090 if adopting soda degreasing washing .For general steel pieces, temp of dipped degreasing is no lower than 80 , spraying washing degreasing temperature is no lower than 60 . To nonferrous metal, degreasing temp is 7080,and mixing.、承受二氯乙烷、四氯化碳、三氯乙烯脫脂時，脫脂件應(yīng)枯燥

7、、無水分。Degreasing pieces are dry when applying C2H4Cl2, CCl4, and C2HCl3.、脫脂、檢驗及安裝所用的工具、量具、儀表等必需按脫脂件的要求預(yù)先脫脂。未經(jīng)脫脂者，不得使用。經(jīng)脫脂的工具、量具、儀表等應(yīng)由專用柜存放，專人保管。工作服、鞋、手套等勞保用品必需干凈無油。Tools, measuring apparatus, and instruments, of grease removal, inspection, andinstallationshallbepre degreasedaccordingtodegreasingpiece

8、s.Otherwise,notuse. There are special box and worker to store and take care of degreased tools and instruments. Labor implements as working clothes, shoes, and gloves shall be cleanand nongrease.、脫脂合格后的儀表設(shè)備、管子在壓力試驗及儀表調(diào)校時，必需使用不含油脂的介質(zhì)。Usingnongreasemediumwhentestingpressureorregulating,degreased instr

9、uments equipments and pipes.、脫脂劑必需妥當(dāng)保管。脫脂后的廢液應(yīng)妥當(dāng)處理。Looking after degreasing solvent properly drain. Disposing with degreased wastedrain properly.、儀表設(shè)備、管子、管件、閥門在脫脂后，必需經(jīng)專職檢查人員檢查和施工單位、承包單位代表確認合格后，方可進展下道工序。For degreased equipments, pipes, pipepieces, valves. Special inspector and agencyof construction a

10、nd contract shall verify and approve. And then, executing next process.、脫脂件經(jīng)檢驗合格，應(yīng)由專人負責(zé)封閉，妥當(dāng)存放，并加標識以防臟物和雜物Special worker properly seals and stores checked degreasing pieces. Marking marker to prevent dust and rubbish sticking or invading. Separating degreased components from undegreasedones.、脫脂合格后，應(yīng)

11、認真填寫脫脂記錄。即：儀表管線管纜試壓、試漏、脫脂記錄。Filling degreasing recorder carefully after grease removal. Including: pressuretest, leakage test, and grease removal recorder of instrument pipelines5、脫脂劑的選用：Selection of degreasing solvent:、脫脂劑應(yīng)按設(shè)計要求選用。當(dāng)設(shè)計無規(guī)定時，應(yīng)依據(jù)脫脂件的材質(zhì)、構(gòu)造、污染程度、現(xiàn)場條件、生產(chǎn)介質(zhì)及其因沾染油脂而造成的危急或危害程度，選擇相應(yīng)的脫 脂劑和脫脂方法

12、。Choosing solvent according to design. If there is no design regulation, selectingcorresponding solvent and method on the base of material and structure of degreasing pieces, pollution degree, field condition, producing medium and its danger degree due to stick grease.、脫脂劑可按表二、表三參考選用。Degreasingsolve

13、nt refer to table, table.常用脫脂劑推舉表脫脂劑名稱工業(yè)二氯乙烷脫脂劑名稱工業(yè)二氯乙烷C H CI242適用范圍附注金屬件能水解生成微量鹽酸工業(yè)四氯化碳CCI4黑色金屬、銅和非金屬件CHCI23產(chǎn)品必需含穩(wěn)定劑工業(yè)酒精CHOH2 595.6%金 屬 件在水和金屬共同存在時能發(fā)生水解生成分解反響，甚至爆炸含穩(wěn)定劑的純?nèi)纫蚁σ话憬饘贌o腐蝕脫脂要求不高的設(shè)備和零部件濃硝酸裝置的耐酸管件和瓷環(huán)脫脂力量較弱98%的濃硝酸強氧化劑，能溶解或腐蝕某些金屬Selection table of common degreasing solvent:by hydrolyzationtab

14、le二by hydrolyzationNameApplying scopeRemarkOf SolventC2H4CL2Metallic piecesProducingalittleHCl,CCLCCL4Black metal, copperandnonmetallicpiecesProducingby ArousingalittleHCl,hydrolyzation.strongdecomposition,evenexplosionwithsomeflaming light metalsC2HCL3(Includingsteady-solvent)PureMetallic piecescon

15、taining steady-solventcan not corrode ordinarymetal.C2HCL3C2H5OH HNO3 (98%)Equipments and components withinferior degrease requirementResist acid pipe-piece and chinaringofthick HNO3 device.Degreasingpoor.abilityisStrongoxidant,candissolve or corrode somemetals.堿性脫脂劑的配方及使用條件序號氫氧化鈉序號氫氧化鈉12碳酸鈉硅酸鈉水氫氧化鈉

16、磷酸鈉 硅酸鈉 水氫氧化鈉磷酸鈉 碳酸鈉 硅酸鈉 水磷酸鈉配方重量%0.5151034 余量125834余量0.51.5372.512余量58適用范圍適用于一般鋼鐵件適用于一般鋼鐵件3適用于一般銅及銅合金件磷酸二氫鈉4硅酸鈉烷基苯磺酸鈉水23560.51余量低，適用于鋼鐵件和鋁合金件Composition and application terms of alkali degrease solventNo.Composition (weight percentage)No.Composition (weight percentage)Application scope1NaOHNa2CO30.

17、51510Common steel-iron pieces.22Na2SiO3H2O NaOHNaPO3 Na2SiO3H2ONaOHNa2CO3 Na2SiO3H2O NaPO3NaSiO3H2O34other125834 other 0.51.5372.512 other5823560.51otherCommon steel-iron pieces.3Common copper andcopper alloy pieces.Pooralkalescence,butcan4remove oil. Poor causticity tometal. Applying to steel-iron

18、pieces and aluminum alloy.、脫脂劑或者用于配制脫脂劑的化學(xué)制品必需具有合格證。Degreasing solvent or chemical product composed of solvent shall have certificate.、脫脂溶劑不得混合使用，且不得與濃酸濃堿接觸。Degreasing solvent cannot use together. No contact with thick acid thick soda.、用于凈脫脂的有機溶劑內(nèi)的油含量不應(yīng)大于50mL/L，含油量 50500mL/L 的溶500mL/LOil content in

19、organic solvent used to pure degreasing is no more than 50mL/L,solvent with 50500mL/L oil content can used to degrease coarsely. As to solvent ofits oil content more than 500mL/L, using it until pass the regeneration process.6、脫脂操作方法：Operating method of degreasing:、儀表設(shè)備脫脂：Grease removal of instrumen

20、t equipment:、易拆卸的儀表設(shè)備進展脫脂時，應(yīng)將需脫脂的部件、附件及填料拆下，一并12Takingapartcomponent,accessories,andfillingofinstrumentequipment to be degreased. Putting them in degreasing solvent anddipping for 12hours.、不易拆卸的儀表進展脫脂時，可承受灌注脫脂溶劑的方法，灌注后浸泡時間2When degreasing instrument, taken apart difficultly, the way of pouring solve

21、nt shallbe applied. Two hours is the least period of dipping. If cannot pass test, pouringagain.、溫度儀表、流量儀表節(jié)流孔板宜承受浸泡方法進展脫脂，浸12Dipping shall be applied to degrease temp, instrument, flow-meter (flowing orifice).Time is 12hours.、儀表管子、管件、閥門的脫脂：Degreasing of pipes, pieces, and valve:再進展脫脂。For pipes, piec

22、es, valve with clear oil-stain or rusty, removing oil and rust, and thendoing greasing removal.、管子外表的脫脂可用擦拭法擦洗。Brushing and washing shall be adopted to degrease pipe appearance. (the externalface of pipe)、管子內(nèi)外表脫脂時，可承受浸泡的方法，浸泡時間為11.5也可承受在管內(nèi)注入溶劑，管端用木塞或其它方法封閉。將管子放平浸泡洗滌，直到脫脂合格為止。The way of soaking to de

23、grease pipe internal surface shall be used and time is11.5hour, Or, adding solvent into pipe which ends shall be sealed by wood-plug or something leveling the pipe and soaking for 11.5hours, rolling it once a quarter to the soaked section gradually. Make pipe rolling several whole round when rotatin

24、g.The whole inner surface of pipe shall be smoothly soaked and washed many timesuntil degreasing eligibility.、儀表閥門脫脂前應(yīng)研磨試壓合格，然后拆成零件去除鐵銹等雜物，門殼體，可用擦拭方法進展。Prior to degreasing, valve pass rubbing pressuretest, then taken apart and removeiron-rust, and dipping into solvent for 11.5 hour. The same method

25、to bolt andmetallic gasket. Applying scrubbing to degrease shell of valve when it not easy to dip.1.52味為止。Choosing CCL4 solvent to degrease non-metallic gasket. Placing gasket into solvent for 1.52hours.Thenfetch, hang dry, inairfree orventilatingplantnon-existence of solvent smell.、脫脂后脫脂劑的去除：Remova

26、l of degreasing solvent after degreasing:為止。其去除方法是：Blowing and removing survival solvent from degreasing pieces completely untilcannot smell the smell of solvent. Following is removal method:a、可用清潔無油、枯燥的空氣或氮氣吹凈。Blowing and drying with clean, dried air or nitrogen.b、當(dāng)用二氯乙烷或酒精等易燃溶劑脫脂時，只許用純度等于或大于 95%按容

27、積計的氮氣吹凈或在空氣流通處晾干。When applying tinder solvent to degrease such as C2H2Cl or alcohol, only nitrogenwith purity no lower than 95% can be used to blow or dry naturally in air free.c24For degreasing pieces with non-complicated structure, and small-sized, ventilatingnaturally for more than 24hours in the

28、 air5060的空氣或氮氣進展吹除。To shorten blowing time, using air or nitrogen preheated to 5060 to blowing orremoving.、用堿液脫脂時，必需用無油清水沖洗干凈至中性，然后枯燥。 If choosing alkali liquid as degreasing solvent, using oil less clean water to wash toneutral and then dry.、當(dāng)用蒸汽吹除者，應(yīng)準時將脫脂件枯燥。Degreased pieces shall be dried in time

29、 except for blowing by steam.7、檢驗：Test、儀表設(shè)備、閥門和管子脫脂后，必需經(jīng)檢驗合格。After degreasing, instrument,equipment,valve, and pipeshallbe testedqualified.、當(dāng)承受直接法檢驗時，符合以下規(guī)定之一的應(yīng)視為合格。Degreased pieces complying with one of the following regulations shall be qualifiedwhen test by direct method.a、用清潔枯燥的白濾紙擦拭脫脂外表時，紙上應(yīng)無油跡

30、。If using clean and dried, white filter paper to scrub surface of degreased pieces, thereis no oil trace on paper.b、用紫外線燈照耀脫脂件外表時，應(yīng)無紫蘭熒光。Lighting the surface of degreased pieces by ultravoilent ray light, nonappearance ofpurple-blue light.Iftestbyindirectway, complying with one of the following regulations shall be passable.a、當(dāng)用蒸汽吹洗脫脂件時，盛少量蒸汽冷凝液于器皿內(nèi)，放入數(shù)顆粒度小于1毫米的純樟腦，樟腦應(yīng)不停旋轉(zhuǎn)。Whenusingsteamtoblowandwashdegreasedpieces,fetchingalittlevapor-condensation liquid into pot and putting several pure napha