【文章內(nèi)容簡介】 lted residue ,scrap and oxidization. 預(yù)制好的管段，按單元或區(qū)域擺放整齊，以便于運(yùn)輸和安裝。管道施焊時(shí)，按規(guī)定的焊接工藝執(zhí)行。管道焊接、無損檢測工作完成后，應(yīng)在預(yù)制廠內(nèi)除銹、噴砂和防腐，但焊口兩側(cè)各100mm的范圍內(nèi)不允許涂漆，焊工鋼印號(hào)、管道編號(hào)以及管線號(hào)不允許涂漆，待系統(tǒng)水壓試驗(yàn)合格后再進(jìn)行防腐涂漆。為保證焊接質(zhì)量，工藝管道焊接均采用氬電聯(lián)焊的工藝進(jìn)行。Prefabricated piping section shall be laid in order to transportation and erection. We will weld plying with regulated welding process. After piping welding and nondestructive test. The derusting, blasting and antirotting steps should be done in the prefabrication yard. But 100mm away form two sides of welding joints and welder’s sign, piping number and pipeline number are not permit to paint, it should be done after system water pressure test qualified. In order to ensure welding quality, all the process piping use argon continuation welding . 預(yù)制完成的管段進(jìn)行管線號(hào)、預(yù)制管段號(hào)標(biāo)識(shí)，并用人工或壓縮風(fēng)將管膛內(nèi)清除干凈，用塑料布封閉管口分門別類擺放。不銹鋼和碳鋼在切割和存放時(shí)，嚴(yán)格區(qū)分開。We make identification tags for pipeline number and prefabrication piping section number which are pleted the prefabrication, clean piping inside by hand and pressure wind, Classify and lay down them with piping mouth closed by plastic cloth. When cutting and storing ,stainless steel and carbon steel should be divided strictly.7 管道焊接 Piping weldingPTA裝置焊接工程中，工藝管道母材的不銹鋼比例在60℅以上，且有鈦一類特殊材質(zhì)的管道，焊接難度大、工藝標(biāo)準(zhǔn)要求高是該工程的主要特點(diǎn)。焊接質(zhì)量直接決定整個(gè)安裝工程的質(zhì)量，因此，我們應(yīng)從焊接材料、焊接工藝、施焊過程、焊接檢驗(yàn)諸方面對焊接質(zhì)量進(jìn)行嚴(yán)格控制，確保每個(gè)焊接環(huán)節(jié)都處于受控狀態(tài)。In PTA assembly welding process, Because there is 60% of stainless steel in process piping parent material and piping has the especial titanium, the main character of the project is the difficult welding and high requirements of process standard. Welding quality determine the overall erection project quality. we will control the welding material, welding process, welding operation ,welding inspection and so on to ensure welding quality and every welding steps in control.焊材型號(hào)和規(guī)格選用應(yīng)嚴(yán)格執(zhí)行焊接工藝評定。焊前檢查、修正接縫的間隙、錯(cuò)邊量等；焊接作業(yè)期間，注意自然環(huán)境對焊接作業(yè)的影響，焊后檢查焊縫表面質(zhì)量、角變形，及時(shí)作出質(zhì)量評定，并按要求進(jìn)行無損檢測，及時(shí)填寫焊接施工記錄。The utilization of the welding models and specification shall be strictly plied with welding process qualification such as checking before welding and correcting the distance in continued joints and misalignment. We will notice welding operation effects by native environment, check welding joints surface quality and twisted angels after welding ,make quality qualification in time ,execute nondestructive inspection with requirements and make record of welding construction in time.7. 1 焊接施工一般要求 General requirement of welding construction 焊工應(yīng)在合格的焊接項(xiàng)目內(nèi)從事管道的焊接，且在有效期內(nèi)。 Welders shall work on piping welding in acceptable welding project and in available period. 焊材應(yīng)有產(chǎn)品合格證明書，并經(jīng)復(fù)驗(yàn)合格。 Welding material should have qualified production certificates and acceptable after checking again. 焊條應(yīng)按說明書或焊接作業(yè)指導(dǎo)書的要求進(jìn)行烘干，并在施焊過程中，使用保溫筒保持焊條干燥。 Welding rod shall be dried by instruments and guide book of welding operation. Insulation tank shall be used for electrode drying in welding operation. 焊工按指定的焊接工藝卡（焊接作業(yè)指導(dǎo)書）施焊。焊接工藝卡應(yīng)按與之相對應(yīng)鋼材的焊接工藝評定進(jìn)行編制，并按程序進(jìn)行審批。 Welders do their job with welding technique card,. Which will be prepared and reviewed by equivalent steel welding process qualification and procedure. equivalent steel welding process qualification and procedure. 當(dāng)出現(xiàn)下列情況如沒有防護(hù)措施時(shí)，應(yīng)停止焊接工作： Welding operation must be stop in case following problem happened without protecta. 手工電弧焊時(shí)，風(fēng)速≥8m/s，氬弧焊時(shí)，風(fēng)速≥2m/s；The wind velocity is≥8m/s in SMAW, the wind velocity is ≥2m/s in arc welding.b. 相對濕度＞90%；Relative moisture is ＞90%c. 下雨；Raining 焊接完畢后，及時(shí)在焊縫兩側(cè)50mm范圍內(nèi)打上焊工鋼印號(hào)，不銹鋼鋼管不做鋼印標(biāo)識(shí)，但是應(yīng)在管道單線圖上標(biāo)注清楚。 Welder’s stamps NO. shall be made in the 50mm range away from welding joints in time, Rebar marks will not be done in stainless steel tubes, but it should be indicated in piping isolated drawings. 焊接材料的選擇 Welding Material Alternative焊接材料選用表 51List for Welding Material Alternative 序 號(hào)No. 管 道 材 料Piping material 焊 絲Welding wire 焊 條Welding rod 備 注Remarks1API5L GR BER1052E701615 2ANSI 304ER308E30816 3 ANSI 304LER308LE308L16 4 ANSI 316ER316E31616 5 ANSI 316LER316LE316L16 6ANSI 317LER317LE317L16 7C276ERNiCrMo4EniCrMo4 8 TI 1ERTi1 奧氏體不銹鋼管道焊接 Stainless piping welding ： The groove spec and size of stainless steel tubes should ply with following regulation:焊接坡口形式和尺寸 Welding Groove Type and Size 52序厚度δ(mm)Thickness坡口類型Groove Type坡口形式Groove Type坡口尺寸Groove size 備注Remarks號(hào)NO.間隙b(mm)Distance鈍邊P(mm)坡口角度α(176。)Groove angle Angle12～3I型坡口Type I groove0～單面焊Single Weldng2～8V型坡口V type Groove0～20～265177。5單面焊Single welding： Stainless piping welding mouth to mouth should ply following requirements:，其錯(cuò)邊量不應(yīng)超過壁厚的10%，且應(yīng)≤； The inside wall of piping mouth