不銹鋼管道預(yù)制施工方案及對策（完整版）

1、一、Purpose 目的This statement is piled to ensure the construction quality of Bayer project pipe fabrication and meet the progress requirement.This statement is used to guide the fabricatio n of all Stai nless Steel pipe afforded by F in Bayer MDI為了保證工程管道預(yù)制工程的施工質(zhì)量和滿足工程進度要求，特編制本方案。 本方案用以指導(dǎo)拜耳異氰醋酸聚醚工程 MDI

2、聯(lián)合裝置 F 承當(dāng)?shù)乃胁讳P鋼材質(zhì) 管道的預(yù)制施工。二、Applicable Scope適用圍This statement is applicable for all Stainless Steel pipe fabrication work afforded by F in Bayer MNB(V210) / WNILINE(V310).本方案適用于拜耳工程 MNB(V210)/WNILINE(V310)裝置F承當(dāng)?shù)乃胁讳P鋼 管道預(yù)制工程的施工。三、Reference 編制依據(jù)Technical specification and standard of this method state

3、ment:本方案編制依據(jù)的施工技術(shù)規(guī)和標(biāo)準(zhǔn)為：(1) GB50235-97construction and acceptance of industrial metal pipeprojectGB50235-97 工業(yè)金屬管道工程施工及驗收規(guī)(2) GB50236-98welding project construction and acceptancespecification of site equipment and industrial pipeGB50236-98 現(xiàn)場設(shè)備工業(yè)管道焊接工程施工及驗收規(guī) (3) Bayer releva nt tech ni cal docume nt

4、 sta nda 拜耳的相關(guān)技術(shù)資料 WN 標(biāo)準(zhǔn)4) 管道相關(guān)圖紙四、Overview工程概況1 Work scope 工作圍The scope of this project includes all Stainless Steel pipe fabrication ofMNB/ANILINE包括 MNB 、 ANILINE 兩個裝置中的所有不銹鋼管道的預(yù)制 。2 Major project quantity 主要工程量Stainless Steepipe in MNB is about 4679m (pipe dia DN600), which amounts to 70 of the w

5、hole run.MNB裝置中不銹鋼管大約4679米管徑W DN15- DN600占總管道的70%Stainless Steel pipe in ANILINE is about 1900m(pipe diW DN15- DN400), which amounts to 20% of the whole run.ANILINE 裝置中不銹鋼管大約 1900米管徑W DN15- DN400占總管道的 20%。五、Tech ni cal con diti ons技術(shù)條件1 Technical documents 技術(shù)文件1.1 Three-dimensional piping drawing us

6、ed for industrialized prefabrication用于工廠化預(yù)制的管道三維圖1.2 Relative construction technical documents (working instructor, process procedure) and management procedure相關(guān)的施工技術(shù)文件作業(yè)指導(dǎo)書、工藝規(guī)程和管理程序1.3 Construction technical clarification card施工技術(shù)交底卡1.4 Standard for piping materials and fittings管材及配件尺寸標(biāo)準(zhǔn)2 Quality

7、control documents質(zhì)量控制文件2.1 Materials qualification or acceptance report 材料合格證或驗收報告2.2 Working procedure handover slip操作工序交接單2.3 Conformance inspection table of piping prefabrication 管道預(yù)制件的符合性檢查表2.4 Tracking drawing and tracking sheet for welding craters 焊口跟蹤圖及跟蹤單2.5 Inspection report (RT, PT, VT)檢驗報

8、告 RT、PT、VT 六、不銹鋼材料的驗收及檢驗標(biāo)準(zhǔn)：1. 管道用材料，焊接用材料必須具有制造廠的合格證明書和質(zhì)量證明書，請業(yè)主協(xié)助完成此項工作。質(zhì)量證明書應(yīng)包括以下容：產(chǎn)品標(biāo)準(zhǔn)號材料的牌號材料的爐罐號、批號、交貨狀態(tài)、重量和件數(shù)品種名稱、規(guī)格及質(zhì)量等級 產(chǎn)品標(biāo)準(zhǔn)中規(guī)定的各項檢驗結(jié)果 技術(shù)監(jiān)視部門的印記。2. 按設(shè)計要求核對其規(guī)格、材質(zhì)、型號。3. 外觀檢查：無裂紋、縮孔、夾渣、折迭、重皮等缺陷，所有管道壁厚均不得 有負(fù)偏差。4. 法蘭、焊環(huán)及盲板密封面平整、光潔、不得有毛刺及徑向溝槽，螺栓，螺母 的螺紋完整，無傷痕，無毛刺等缺陷，配合良好。墊片，無折損、皺紋等缺 陷。5. 經(jīng)檢驗合格的管材，

9、應(yīng)按規(guī)格尺寸分別放置在專門設(shè)置的地方，嚴(yán)禁與鋼材 混堆和直接接觸或碰傷。6. 材料負(fù)責(zé)人檢查并收集管道、管件、閥門、焊絲等所有管材的合格證及質(zhì)量 保證書。7. 彎頭、異徑管、三通、法蘭、盲板及緊固件等進展檢查，其尺寸偏差應(yīng)符合 現(xiàn)行標(biāo)準(zhǔn)，材質(zhì)應(yīng)符合設(shè)計要求。8. 石棉、橡膠、塑料等非金屬材料墊片應(yīng)質(zhì)地柔和，無老化變質(zhì)或分層現(xiàn)象。 外表不得有折損，皺紋等缺陷。金屬墊片的加工尺寸、精度、光潔度及硬度 應(yīng)符合要求，外表應(yīng)無裂紋、毛刺、凹凸槽徑向劃痕及銹斑等缺陷，包金屬 及纏繞式墊片不應(yīng)有徑向劃痕、松散等缺陷。9. 對驗收后的不銹鋼材料管子、管作、法蘭每批進展5%的光譜分析檢查。七、Fabricati

10、on preparation and ste施工預(yù)制準(zhǔn)備和步驟10. Preparation for fabrication制準(zhǔn)備10.1. According to the demand of Bayer project work, Stainless Steel fabrication yard is set in (F Weiwu Road).根據(jù)拜耳要求和施工的需要分別設(shè)置兩個預(yù)制場地： 不銹鋼預(yù)制場設(shè)置 在 F 衛(wèi)五路10.2. Before fabrication, pipe professional technician shall timely do the shift wor

11、k of drawings, mark weld NO. SW-shop weld; FW-field weld. The principle of drawing shift: e*pand fabrication depth based on the convenient transportation and installation together with plan sketch, in order possibly to finish fabrication work in fabrication shop and管道預(yù)制前，管道專業(yè)技術(shù)人員要做好圖紙轉(zhuǎn)換，標(biāo)定焊口號：SW表示預(yù)制

12、焊口，F(xiàn)W現(xiàn)場焊口，預(yù)制分段。圖紙轉(zhuǎn)換的原則是：為了盡可 能多在預(yù)制車間完成管道的制作， 結(jié)合平面圖在考慮方便運輸與安裝的 前提下，盡量擴大預(yù)制深度。10.3. Any people who join the fabrication work (helper e*cluded) must be proficient technician. Worker who does pipe welding must hold effective certificate being conformed to the work they conduct. These people must have rec

13、eived the welder trai ning of this project and has qualified the te 凡參加管道預(yù)制作業(yè)的人員 輔 助工除外必須是熟練的技術(shù)工人。參與管道焊接的工人必須持有與所從 事的作業(yè)相符且在有效期的合格證書，并經(jīng)業(yè)主焊工培訓(xùn)考試合格的施工人員。10.4. Properly requisite fabrication material as per fabrication progress, received material must have certificate and re-check report. The vent and h

14、ygiene shall be good infabrication yard, equipment process ability in fabrication shop shall meet the operatio n requireme nt and have good operati on performa nee. Tool and mach ines in fabrication shop shall be plete, having special lay down area and full time keeper. Equip one set of 3用 oil-free

15、pressor and corresp onding line arran geme nt for in-pipe blow of pipe fabricati on piece.根據(jù)預(yù)制進度方案合理領(lǐng)用預(yù)制材 料，領(lǐng)用的材料必須具有產(chǎn)品合格證或復(fù)驗報告。必須是經(jīng)過標(biāo)色的不銹鋼管道：HB/1.4306褐色;H2/1.4404無；H1/1.4307/1.4306藍色;HU/1.4539桔黃色。預(yù)制場地應(yīng)有良好的通風(fēng)狀態(tài)和衛(wèi)生環(huán)境，預(yù)制車 間的設(shè)備加工能力須滿足預(yù)制的操作要求，并具有良好的操作性能。預(yù)制 車間的工機具應(yīng)齊全，并有專門的堆放場所和進展專人管理。預(yù)制場地需要隔離的地方，用橡膠皮或石棉板

16、做好隔離準(zhǔn)備。配制一臺3m3無油空壓機及相應(yīng)的管線布置，用于管道預(yù)制件的管吹掃。2Fabricatio n step (see Appe ndi*1 施工預(yù)制步驟material requisiti on and chec領(lǐng)料、核對材料IDransfer of pipe 管子標(biāo)識移植size lin eatio n劃線標(biāo)注尺寸bait ing and cutt ing下料切割 Pipe ID tran sfer 管子標(biāo)識移植Groove treatme nt坡口加工aSta in less 卜Steelembly and weldg組對、焊接weld ID 焊縫標(biāo) 一VisualInspect

17、ion 目視檢查NDT inspection NDT 檢查spools clear管段清潔spool ID管段標(biāo)識seal a nd storage封口保護、堆放儲存2.1 Batchi ng 配料Full-time material pers on shallbe in charge of batchi ng, in prin ciple, batch ing of piping fittings shall be pleted as isometric a*is drawing, all requisited material must bemarked for batch ing and

18、 con structiofiE料應(yīng)由專職材料員負(fù)責(zé)，原則 上按等 軸圖進 展管 配 件 配 料 ，所有領(lǐng)用的材料必須進展標(biāo)識后， 方可領(lǐng)出配料施工 。2.1.1 Batching work shall be made according to prefabrication weekly plan and material delivery as per isometric a*is drawing 料工作應(yīng)根據(jù)預(yù)制周方案和材 料到貨情況按等軸圖進展配制。2.1.2 Special bo* can be used separately for storage as each isometric

19、 a*is drawing. It is also allowable to batch in several drawings or tens of drawings;furthermore, batched material schedule shall be pasted on the 可o 按每等軸圖用專用箱子 分開配放，也可幾或幾十圖紙開在一起配好， 并在箱子上貼上配好的材料清單。2.1.3 When prefabrication personnel requires (of specially delivery), requisition persons shall recheck

20、 according to material schedule and sign it for confirmation. One list shall be in two copies; requisition person and material person keep each one copy.預(yù)制人員領(lǐng)用或?qū)Ｋ蜁r，領(lǐng)用者應(yīng)按材料清單進展復(fù)查并在清單上簽 字確認(rèn)，清單一式兩份，領(lǐng)用者和材料員各保管一份。2.2 Bating and cutting 下料切割2.2.1 Spool field bating and cutting shall be done after reviewin

21、g spool isometric,the major reviewing point:管段現(xiàn)場下料切割前應(yīng)首先對管段單線圖進展審核，主要Drawing number, line number, spool number and material is as per designor not. 圖號、管線號、管段號及材質(zhì)是否與設(shè)計相符；Spool segment and reserved weld for field installation of each isometric a*ial drawing is reasonable or not, and field resurvey for

22、 spool fabrication size shall be necessarily conducted. Accurately calculate when confirming baiting size of each spool, mainly considering about difference between fabrication spool size and baiting spool size, baiting spool size shall deduct theoretical size of elbow, tee and reducer, as well as r

23、egulated weld assembly gap; and thickness of flange and gasket, as well as theoretical size of other fittings (such as valve, filter; etc). confirm practical size of fabrication baiting after measuring in order to increase the measuring accuracy. 每一等軸圖的管段分段、現(xiàn)場安裝預(yù)留口是否合理，并應(yīng) 對管段預(yù)制尺寸進展必要的現(xiàn)場復(fù)測。在確認(rèn)每一段下料尺寸

24、時， 應(yīng)準(zhǔn)確計算，主要考慮預(yù)制段尺寸和下料段尺寸之間的差異，下料 段尺寸應(yīng)去除彎頭、三通、大小頭等管配件的理論尺寸以及規(guī)規(guī)定 的焊口組對間隙；法蘭、墊片的厚度以及其它配件如閥門、過濾 器等的理論尺寸。以提高測量準(zhǔn)確度，測量后確定預(yù)制下料的實 際尺寸。2.2.2 Original mark shall be transferred before cutting pipes, pipe material without mark or with blurry mark shall not be used.管子切割前應(yīng)移植原有標(biāo)記， 沒有標(biāo)記或標(biāo)記模糊不清的管材不得使用。2.2.3 Pipe cut

25、ting generally adopts mechanical method, any following machine can be adopted accordi ng to situatio n管子切割必須應(yīng)采用機械方法，根據(jù)情況可采用以下任何一種機械：Pipe lathe管子車床Band saw machi n帶鋸床Abrasion wheel cutting machine不銹鋼專用 砂輪切割機和砂輪片2.2.4 Stainl ess steel pipe also can be cut by plasma cutt ing mach不 銹鋼管也 可以用等離子切割機進展切割。2.

26、2.5 When stainless steel pipe is cut by abrasion wheel cutting machine or grinded by abrasive disk, must use alumina substrate, and abrasion sheet which has cut or grin ded sta ini ess steel cannot be used to cut or grind sta ini ess steel pi 不銹鋼 管用砂輪切割機切割或用砂輪打磨時， 必須用氧化鋁基的砂輪片， 且切割或 打磨過碳素鋼的砂輪片不能用來切割或

27、打磨不銹鋼管。2.2.6 Pipe cut shall be as per the followi ng requireme nt管子切口質(zhì)量應(yīng)符合 以下要求：Cut surface shall be smooth, free of crack, double skin, burr, concave and conv e*, con tracted ope ning, sin ter, o*ide, slag or other defects or de切is. 口外表平整，無裂紋、重皮、毛刺、凹凸、縮口、熔渣、氧化物、 鐵屑等。Tilting error of cut end face sh

28、all not be 1% bigger than e*ternal diameter of pipes, and no more than 3mn切口端面傾斜偏差不應(yīng)大于管子外徑 的1%,且不超過3mm。如執(zhí)行的標(biāo)準(zhǔn)不同時，按相應(yīng)標(biāo)準(zhǔn)執(zhí)行2.3 Groove Processing 坡口加工2.3.1 Groove shall be processed after marking and cutting on pipe (material) by construction personnel according to fabrication isometric drawing shifted

29、bytechnical person. Beveled spool shall be put on process bench (fabrication shop)for groove grinding. 施工人員依據(jù)技術(shù)人員已轉(zhuǎn)化的預(yù)制單線圖紙對管道素材進展劃線、切割下料后進展坡口加工。 坡口加工的管段應(yīng)放置在加 工臺上預(yù)制車間進展坡口打磨；2.3.2 Groove type and size of pipe and fitting shall be conformed to requirement of corresponding to drawing and design documen

30、t, when there is no demand on design, confirm as per item ofGB50235-97 Appendi*B.管子、管件的坡口型式和尺寸應(yīng)符合相應(yīng)的圖紙和設(shè)計文件的要求，當(dāng)設(shè)計無規(guī)定時，按GB50235-97規(guī)附錄B第條規(guī)定確定。Processingof piping slope is monly adopting mechanicalmethod, for e*ample, after slope is processed in a way of heat processing,o*ide skin, sinter and surface

31、layer that will have effect on the quality of joints at slope shall be removed, and the place that is conve* or concave shall be ground and leveled.Stainless steel shall be cut or grinded by special abrasion sheet, and cannot be mi*ed with carbon steel abrasion sheet.管道坡口加工一般采用機械方法， 不銹鋼管道的坡口加工可采用坡口機

32、加工 或等離子切割加工方法。 采用 等離子切割 方法加工坡口后， 必須除去坡口外 表的氧化皮、 熔渣及影響焊接質(zhì)量的外表層， 并應(yīng)將管子端面的凹凸不平處 打磨平整。不銹鋼切割或打磨時應(yīng)使用專用砂輪片， 不得與碳鋼砂輪片混用。No matter which method is used, after slope opening is processed, oil, water, rust and other debris shall be cleaned無論用哪一種方法， 坡口加工完畢后， 均應(yīng)去除油圬、水份、鐵銹等雜物。2.4 Weld assembly 焊口組對z.2.4.1 Assembl

33、y 組對Whe n assembli ng, clea n groove and its internal and e*ter nal surface as perthe followi ng table:組對時，對坡口及其外外表應(yīng)按下表要求清理干凈：Pipe material管道材質(zhì)Clea n range清理圍Clea ning materia清理物Clea ning method清理方法CS碳素鋼SS不銹鋼AS合金鋼 10Oil, paint and rust油、油漆鐵銹等Manual or mach ine手工或機械A(chǔ)lumi num or A-alloy鋁及鋁合金 50Oil and

34、 o*ide film油、氧化膜Useorga nicdissolve nttoremove oil, use chemicalormecha ni cal method to remove o*ide film.用有機溶劑除油，用化學(xué)方法或機 械方法除氧化膜Copper and copperalloy銅及銅合金 20Tita nium 鈦 50Use gasket material to isolate the bench and support used for sta ini ess steelassembly.對于不銹鋼管組對用的臺架、支承架等，應(yīng)用襯墊材料進展隔離After asse

35、mbli ng, shall keep pipe straighfi 對后，應(yīng)保持管子的平直。As for the thin wall pipe easily deforming during welding, use special clamp to fi* it during assembly. 對于焊接時易產(chǎn)生變形的簿壁管，組對時 應(yīng)使用專用夾具進展固定。During weld assembling, inner wall shall be smooth , unfitness of inner wall shall not be bey ond 10% of wall thick ne

36、ss and not more tha n 2m#i 口 組 對時，應(yīng)做到壁平齊，壁錯邊量不宜超過壁厚的 10%，且不大于 2mm。During assembling pipe ponent with uneven wall thickness, repair as per item .b and then assemble. 不等厚管道組成件組對時，應(yīng)按 .b 條要求 進展修整后再進展組對。Further check whether there is scratch on sealing surface of flange or not during assembly, if there i

37、s scratch that shall influence flange sealing, this flange shall not be used法蘭時應(yīng)進一步檢查法蘭的密圭寸面有無徑向 劃痕，如果發(fā)現(xiàn)有影響法蘭密封的劃痕，該法蘭不得使用。If the flange is connected with valve, ensure site installation of valve is as per the desig n requireme nt duri ng assembly如 果是連接閥門的法蘭， 在組對時要保證閥門在現(xiàn)場安裝時符合設(shè)計要求。Put pad under the

38、butt-welded pipe to ensure it is firm, in order to avoid the deformation during welding, strong force shall not be used for assembly during connecting pipe. 管子對口后應(yīng)墊置結(jié)實，防止焊接過程中產(chǎn) 生變形，管道連接時不得強力組對。All assembled welding joint size shall ply with the requirement of designdocument or drawing. 所有組對好的焊接接頭尺寸應(yīng)

39、滿足設(shè)計文件 或圖紙的要求。2.4.2 Welding 焊接Operation requirement during the whole welding(including pipe welding, non-destruction inspection, weld repair; etc) see pipe welding method statement of pipe fabrication plant. 整個焊接過程包括管道焊接、無 損檢測、焊口返修等工序的操作和要求 詳見管道預(yù)制廠管道焊接 方案 和焊接工藝卡 。2.5 Superficial treatme nt of sta in

40、 less steel pipe wel不 銹鋼管道焊縫的外表處理2.5.1 If there is requirement in design document regulation or implementation standard, superficial treatment shall be used for all stainless steel pipe weld, remove o*idizi ng layer un til the base metal color shall be e*posed.女口設(shè)計文件的規(guī)定 或執(zhí)行的標(biāo)準(zhǔn)有要求， 應(yīng)對所有的不銹鋼管焊縫的外外表進展處

41、理， 去除外 表氧化層，到達金屬母材本色。2.5.2 Generally use pickling cream (mordant) to wash it, also shall use other methods to brush it, like stainless steel wire, the concrete operation shall be as per corresponding standard. 處理方法一般采用酸洗膏 酸洗液進展酸洗， 涂液 4 小時后在焊口處 用不銹鋼鋼絲刷進展刷擦，具體操作應(yīng)執(zhí)行相應(yīng)的標(biāo) 準(zhǔn)。2.6 Mark on pipe fabrication p

42、iece管 道預(yù)制件的標(biāo)記2.6.1 Mark all pipe fabricati on piece accord ing to spool NO on isometri對所有管道預(yù)制件進展標(biāo)記，按等軸圖上的管段編號進展。2.6.2 use mark pen or pain to mark Welder ID (welder NO or weld NO)工標(biāo)識焊工號及焊口號應(yīng)采用記號筆或油漆進展。 注意：油漆必須和底漆一 樣 cl- mmp2.6.3 Mark shall be clear and remain for a long time at least when this spool

43、 isfinished installation標(biāo)記應(yīng)清晰，且能保持較長時間。至少應(yīng)保持到該管段安2.7 Clea nn ess of pipe fabricati on piec管 道預(yù)制件清潔度Cleannessinspection shall be conducted on fabricated spool, there is no foreign matter inside pipe, such as welding slag, oil, rubble, if there is debris, use scrub or air blow to clean them. 對于預(yù)制好的管段進

44、展清潔度檢 查，管不得有焊渣、油跡、石子等外來物，如有雜物，應(yīng)用擦洗或 壓空吹掃的方法來進展去除， 去除后立刻進展管口的包裝保護，防止異 物再次進入 。2.8 Con formity in spect ion of fabricati on piece預(yù)制件的符合性檢查Conformity inspection (as per proportion)is conducted to pipe fabrication piece according to design document requirement, main content is as follows: 應(yīng)根據(jù)設(shè)計文件要求，對管道預(yù)制

45、件進展符合性檢查按比例 ，主 要容如下：2.8.1 En sure the material specificati on, type and material is correct 認(rèn)使用材 料的規(guī)格、型號、材質(zhì)正確無誤。2.8.2 En sure pipe fabricati on spool size is con formed to draw ing requireme 確認(rèn)管道預(yù)制段的尺寸符合圖紙要求2.8.3 Ensureweld appearance quality and non destruction inspection is conformed to design doc

46、ume nt requireme nt確認(rèn)焊縫的外觀質(zhì)量和無損檢驗滿足設(shè)計文 件要求。2.8.4 Fill in conformity inspection record of pipe fabrication piece(seeattachment 2) 填寫好管道預(yù)制件符合性檢查記錄見附錄2Note: conformity inspection record of fabrication piece is confirmed and filled in by QC personnel. 說明：預(yù)制件的符合性檢查記錄由 QC 人員 負(fù)責(zé)檢查確認(rèn)填寫。2.9 Pack for pipe fab

47、rication piece管 道預(yù)制件的包裝保護2.9.1 Use polyethylene cap to seal for pipe end of small bore pipe fabrication piece.If pipe cap is loose ning, use adhesive tape to fi* on pip對于小口徑的管道預(yù)制 件的管端用聚乙烯管帽進展封口， 如管帽較松時，可用膠粘帶固定在管子上。2.9.2 Use clean white glabrous cloth or polyethylene plastic cloth to pack and use adh

48、esive tape to fi* for pipe end of big bore pipe fabricatio n piece 對于大口徑 的管道預(yù)制件的管端用清潔的無毛白布或聚乙烯塑料布包扎并用膠粘帶固定。2.9.3 Flange surface generally use adhesive plate to pack, use nylon (galvanized iron wire) to bind and fi* through the hole pre-drilled on flange bolt and cover plate. 法蘭面一般用膠合板進展包裝， 包裝方法可用尼龍繩

49、 鍍鋅鐵絲 通過法蘭 螺栓孔和蓋板上預(yù)先鉆好的孔綁扎固定。2.9.4 If there is additional requirement for design, use polyethylene film to packthe whole stainless steel fabrication piece. 如果設(shè)計另有要求，對整個不銹鋼預(yù)制件用聚乙烯薄膜包裹起來。2.9.5 對檢查合格以及包裝保護好的預(yù)制件按照指定的地點存放。存放的原 則是先裝置后系統(tǒng)再管線。2.9.6 對檢查合格以及包裝保護好的預(yù)制件及時輸機進展有效管理，保持預(yù) 制件的可追溯性。八、 Safety and techniq

50、ue measure (JHA Appendi* 3)平安技術(shù)措施JHA分析附錄3All workers entering fabrication shop must wear uniform work clothes, helmet and crash-proof shoes進入預(yù)制現(xiàn)場的所有作業(yè)人員必需穿公司統(tǒng)一工 作服，戴好平安帽，穿防砸勞保鞋。No smoking in construction area and site office area, smokers shall go to in dicated place for smoke施工區(qū)域、預(yù)制場辦公區(qū)域嚴(yán)禁吸煙，吸煙人 員必

51、須到指定地點吸煙。Major danger: fire and e*plosion proof must be done as per relevant regulation when welding or cutting, fire work must be done with permit and as per regulation. People who conduct site groove grinding or cutting with angular abrader, abrasion wheel cutter and acetylene cutter must wear pro

52、tective glasses and mask; set isolation screen if necessary in order not to damage people around. Mask must be worn to protect eyes when cooperating with welding work. Change abrasion sheet when its effective radius is grinded into 1/3 of orig inal radius, abrasi on sheet with defect and crack is pr

53、ohibited to us主 要危險點：焊接或切割時要做好防火防爆措施，必須按防火防爆平安施 工有關(guān)規(guī)定。使用角向磨光機、砂輪切割機以及乙炔割刀進展預(yù)制場坡 口打磨或火炬切割作業(yè)人員必需戴防護眼鏡或防護罩； 為了不傷及周圍 作業(yè)人員，必要時設(shè)置隔離屏風(fēng)。配合電焊作業(yè)時，須戴防護面罩以保 護眼睛。砂輪片的有效半徑磨損到原半徑的 1/3 時必須更換，砂輪片有 缺損或裂紋者嚴(yán)禁使用。O*ygen and acetylene bottle must be far away from fire and be vertically located and fi*ed. 氧氣、乙炔氣瓶必須遠離動火點， 并

54、且綁扎固定豎直立 放。Before welding and cutting, first clean environment around, remove bustibles or use fire-proof cloth (blanket)to isolate bustibles in order to protect flammable equipment and modity. E*tinguisher must be set in fabrication yard during work. 在進展焊接或切割作業(yè)前，要先清理周圍環(huán)境，移除或用 防火布毯隔離可燃物、保護易燃易爆的設(shè)備及物品。班組作業(yè)時預(yù) 制現(xiàn)場必需放置消防滅火器材。 危險點Far away from gas and heat source in order to prevent e*plosion which hurt people. 遠離氣源、熱源，小心爆炸發(fā)生造成人身傷害。Follow site safety management department and obey management and demand of F