【正文】 及驗收技術(shù)規(guī)范》(管道篇)DL503194《電力建設(shè)施工及驗收技術(shù)規(guī)范》（火力發(fā)電廠焊接篇）DL500792《石油化工企業(yè)設(shè)備管道表面色和標(biāo)志》SH30431991《石油化工異種鋼焊接規(guī)程》SH35261992《石油化工鉻鎳奧氏體鋼、鐵鎳合金和鎳合金管道焊接規(guī)程》SH35231999《壓力容器無損檢測》（JB473094）；《石油化工施工安全技術(shù)規(guī)程》（SH350599）；《工程建設(shè)交工技術(shù)文件規(guī)定》（SH350393）；《50萬噸/年延遲裝置施工組織設(shè)計》；《壓力管道安裝質(zhì)量保證手冊》（QG/）；《壓力管道安裝質(zhì)量程序文件》(QG/)；《壓力管道安裝工藝標(biāo)準(zhǔn)》（QG/）；《壓力管道安裝竣工技術(shù)文件規(guī)定》（QG/）。 There are many movable equipments in the installation, we need ensure pipe erection without stressing, and cannot impose external force on the equipments, In the pipe erection, we need start from the equipment inside, and then the outside of the equipments. We need set up the pipe rack in time to avoid the gravity from the pipe system.，需要投入大批量的優(yōu)秀焊工。The quality assurance of pipe construction material is the basis of the construction quality. Our pany owns a available and mature management system of material inspection and we will adjust it according to the actual project character for quality ensure. 成立專門的檢驗小組實施統(tǒng)一的管材管件檢驗，并按照相應(yīng)標(biāo)準(zhǔn)組織檢驗。 The valve inspection and test procedure see drawing 31%，且不少于1個，進行殼體壓力試驗和密封性試驗。 Internal water in the valve acceptable should be drained in time and density area should be dried and coated with rust preventive oil. The valve should be closed .The egress and ingress should be closed.，允許偏差為177。防止施工過程用錯材料，并方便檢查人員監(jiān)查確認(rèn)。 Steel material cutting and piping groove process should use methods as follows。焊接質(zhì)量直接決定整個安裝工程的質(zhì)量，因此，我們應(yīng)從焊接材料、焊接工藝、施焊過程、焊接檢驗諸方面對焊接質(zhì)量進行嚴(yán)格控制，確保每個焊接環(huán)節(jié)都處于受控狀態(tài)。 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措施時，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，風(fēng)速≥8m/s，氬弧焊時，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，及時在焊縫兩側(cè)50mm范圍內(nèi)打上焊工鋼印號，不銹鋼鋼管不做鋼印標(biāo)識，但是應(yīng)在管道單線圖上標(biāo)注清楚。充氬時，應(yīng)將管口內(nèi)部的空氣置換干凈，待坡口處有氬氣均勻流出時方可進行焊接。Tungsten argon arc welding and arc with heatronic electrical power are applied for titanium welding。填充焊絲也應(yīng)用丙酮清理干凈。②焊炬拖罩型式應(yīng)根據(jù)焊件型狀和尺寸決定，做到保護可靠，操作方便③管內(nèi)應(yīng)提前充氬，排凈空氣，并保持微弱正壓和呈現(xiàn)流動狀態(tài)。After the pletion of the welding, all the welding joint should be examined by ray to carry out in accordance to the design standard. 8 管道安裝Pipe Erection 根據(jù)PTA裝置工藝管線的特點，管道安裝工程將提供以下質(zhì)量保證： ① 保證管道材料（材質(zhì)、規(guī)格、型號）使用正確 ② 保證管道內(nèi)部清潔及與其連接設(shè)備內(nèi)部清潔 ③ 保證閥門安裝方向及閥門手輪方向安裝正確 ④ 保證管道材料從接收、檢驗、保管、領(lǐng)用記錄詳實，使所用材料具有可追溯性⑤ 保證管道焊接質(zhì)量可靠⑥ 保證管道試壓吹掃氣密質(zhì)量可靠⑦ 保證管道施工過程記錄真實完整In accordance to the character of PTA, pipe erection works will afford such quality assurance.1. The pipe material(material quality, specification and size) should be used correctly.2. The inner of the pipe and the linked fittings should be cleaned.3. The valve as well as the handwheel should be erected in correct position.4. The pipe material has a detailed record of receiving, checking, keeping and using, and the used material is ascendable.5. The quality of the weld pass is trust6. The quality of the pressuring pipe is trust7. The records of the weld construction is trueThe basic principle of pipe erection遵循先大管，后小管；先干線，后支線；先主管，后伴管；先公用工程，后工藝物料配管；先管廊后設(shè)備配管的施工順序。We can correct fixed welding butt joint in tools, but these defects such as deviation of surface ,wrong butt should not made up by force and adding pads and inclined pads.，保證螺栓能自由穿入。Before the linking of pipe, the level and same spindle degree should be checked in native condition, and the tolerance plies with the following table.法蘭平行度、同軸度允許偏差 Flange level and spindle degree tolerance 表6—1機器轉(zhuǎn)速(r/min)machine spe。螺栓緊固應(yīng)均勻?qū)ΨQ，松緊適當(dāng)，要保證螺母滿扣，且外露長度兩端基本保持一致。The construction sequence should be big tube prior to small tube, main wire prior to branch wire, main tube prior to second tube, public engineering to technical engineering. The sequences can be adjusted for the impact by tube, the received date and concerned work. 安裝的一般要求General requirements of erection，重點注意標(biāo)高、介質(zhì)流向、支吊架型式及位置、坡度值、預(yù)拉值、管道材質(zhì)、閥門的安裝方向；在施工中若出現(xiàn)管線相碰，盡量減少管道的修改，避免受材料影響而影響施工進度。熄弧時焊工先切斷焊接電流，保持接頭處于氣體保護之下，直到焊縫金屬冷卻到200℃以下。The gloves for welders should be washed by water or acetone, and eliminated the rough edge and the fur prior to the welding performance. 管子組對時應(yīng)做到內(nèi)壁平齊，對口錯邊量不應(yīng)超過壁厚的10℅且不大于1mm。99℅），氣體含水量不應(yīng)大于50mg/m3，保護氣體輸送采用透明塑料軟管。In order to ensure the welding shape quality of pipe mouth backing, All stainless tubes welding should use argon arc welding to make a bottom, When making the bottom. Argon should be filled the tubes. We should fill argon when prefabricated tubes mouth welding, it should be done in the condition of two tube mouths are closed. The welding area should sealed with hospital adhesive tape and opened with welding progress. When erecting the tubes welding, we will lay down lyotropic paper in welding mouth inside before correcting the welding mouth group and use filled arc locally to protect. We should change air in the inner tube until the arc in the groove flow in uniform. After the first pass welding, we need check the first welding joint and continue to weld next when qualified to avoid the welding defects.，應(yīng)避免橫向擺動，焊道不宜過寬，焊接應(yīng)連續(xù)，要一次完成，不應(yīng)中斷。)Groove angle Angle12～3I型坡口Type I groove0～單面焊Single Weldng2～8V型坡口V t