【文章內(nèi)容簡(jiǎn)介】 and equipment installation/handover Check and clearance of prefabricated pipe sections and fittings Installation piping supports and brackets Piping assembly tack welding Piping welding Piping weld check and NDT Joint inspection of piping installation Piping test, purging (cleaning), tightness removal of piping welding defects Normal piping installation procedure 8 positions in the construction drawings and code identification of the prefabricated piping. Internal checks and clearance should be made again of the pipe sections, fittings and valves with damaged sealing (plastic cap, plastic cloth or block board), and they can only be assembled, connected and welded after they are proved to be in conformity. 合格的法蘭、閥門(mén)、墊片密封面安裝時(shí)不得發(fā)生損壞，若發(fā)生影響密封損壞要立即更換、修復(fù)，方可安裝連接。 Conforming sealing of conforming flanges, valves and washers should be damaged during installation. Damaged ones affecting the sealing should be replaced or repaired immediately before they can be installed and connected. 法蘭連接應(yīng)與管道同心，應(yīng)保證螺栓自由穿入，法蘭螺栓孔應(yīng)跨中安裝。法蘭平 行度偏差不大于法蘭外徑的 ‰ ，且不大于 2mm，不得用強(qiáng)緊螺栓的方法消除歪斜。 Flange connection should be eccentric with the piping, and ensure free insertion of the bolt. Flange bolt hole should be installed in the middle. Deviation of flange parallelism is not greater than ‰ of the outsi de diameter and not greater than 2mm. Do not eliminate obliqueness by tightening the bolt excessively. 螺栓緊固件安裝，同一連接處同一規(guī)格螺栓，安裝方向應(yīng)一致。螺母緊固后應(yīng)與法蘭緊貼，不得有楔縫，緊固后的螺母與螺栓端面宜齊平。螺栓宜采用對(duì)稱(chēng)擰緊、順序二 次擰緊或采用對(duì)稱(chēng)擰緊、間隔擰緊、順序擰緊三次擰緊的方法進(jìn)行緊固。 管道的螺栓和螺母安裝時(shí)，其螺栓和螺母應(yīng)涂以二硫化鉬油脂、石墨機(jī)油或石墨粉。 Bolts of same specifications should be installed at the same connection amp。 should be installed in the same direction. Tightened nuts should be close against the flange, leaving no seam, and should better be flush with the end surface of the bolt. Bolts should be tightened symmetrically and then sequentially, or tightened three times: symmetrically, at intervals, and sequentially. Piping bolts and nuts should be coated with molebdenum disulphite grease, graphite oil or graphite powder before installation. 管道對(duì)接接口組對(duì)，按焊接要求對(duì)管口內(nèi)外和坡口進(jìn)行處理，管口組對(duì)用平板尺測(cè)量，在距管口中心 200mm 處測(cè)量平直度，如下圖所示 : For piping butt pairing, the interior and exterior of the orifice and the groove shall be treated in accordance with welding requirement. Measure orifice pairing with a flat plate ruler, and measure the straightness at 200mm from the orifice center, as shown in the 9 figure below: 管道對(duì)接口平直度測(cè)量 Measurement of straightness of piping butt 管道對(duì)接平直度測(cè)量允許偏差 Allowable deviation for measured straightness of piping butt 管道規(guī)格 Piping specification 允許偏差 Allowable deviation 全長(zhǎng)允許偏差 Allowable deviation over the entire length DN ? 100 mm 1 mm ≤ 10 mm DN ≥100 mm 2 mm ≤ 10 mm 管道的點(diǎn)固焊，應(yīng)等同正式焊接，其焊接工藝、材料和控制應(yīng)嚴(yán)格執(zhí)行相應(yīng)管道的焊接工藝要求 (詳見(jiàn)管道焊接 )。 Piping tack welding should be treated in the same way as the final welding, and welding process, materials and control should be strictly in accordance with technological requirement for welding of corresponding piping (refer to piping welding for details). 螺紋連接的管道或管道上的部件，若設(shè)計(jì)無(wú)要求其螺紋接頭密封材料均使用聚四氟乙烯帶，擰緊螺紋時(shí)，不得將密封材 料擠入管內(nèi)。 If not specified in the design, threaded joints of threadconnected piping or ponents on the pipes should use teflon band as sealing material. When tightening the threads, do not extrude the sealing material into the pipe. 管道連接時(shí)，不得強(qiáng)力組對(duì)，法 蘭、閥門(mén)不得用加偏墊、多層墊等方法消除接口端面間隙、偏斜、錯(cuò)口或不同心等缺陷。 For piping connection, do not force any pairing, and do not use inclined washers or multilayer washers for flanges and valves to eliminate defects of joint end face such as clearance, deviation, displacement and eccentricity. 管道預(yù)拉伸或壓縮應(yīng)在預(yù)拉伸或壓縮區(qū)域內(nèi)的固定管架安裝完畢，需熱處理的焊縫處理合格；預(yù)拉伸或壓縮區(qū)域內(nèi)支、吊架安裝完畢，支、吊架彈簧按設(shè)計(jì)值壓a 200 鋼板尺 steel plate ruler 10 縮并臨時(shí)固定后進(jìn)行，預(yù)拉伸或壓縮的數(shù)值必須符合設(shè)計(jì)文件規(guī)定。 Piping pretension or pression should be made after the fixing brackets have been installed in the pretension or pression area, weld seams that need heat treatment have been treated accordingly, hangers/supports have been installed in the pretension or pression area, and hanger/support springs have been pressed according to the design value and fixed on an interim base. The pretension or pression values must conform to what is specified in the design document. 管道安裝的允許偏差應(yīng)符合下表規(guī)定 : Allowable deviation of piping installation should conform to the table below: 項(xiàng)目 Item 允許偏差 Allowable Deviation (mm) 坐標(biāo) Coordinates 架空及地溝 Overhead and ground ditches 室外 Outdoor 25 室內(nèi) Indoor 15 埋 地 Embedded in the ground 60 標(biāo)高 Elevation 架 空及地溝 Overhead and ground ditches 室外 Outdoor 177。20 室內(nèi) Indoor 177。15 埋 地 Embedded in the ground 177。25 水平管道平直度 Straightness of horizontal piping DN≤100 2L‰ ， 50 DN?100 3L‰ ， 80 立管鉛垂度 Plumbness of vertical piping 5L‰ ， 30 成排管道間距 Distance between pipes in a row 15 交叉管的外壁或絕熱層間距 Distance between external walls or heat isolating layers of crossed piping 20 壓縮機(jī)組及機(jī)泵管道安裝 Installation of the piping for the pressor set and pump 機(jī)組、機(jī)泵管道安裝前，應(yīng)檢查預(yù)制管段、管路附件、閥門(mén)、墊片及緊固件的規(guī)格、材質(zhì)、等級(jí)及管段編號(hào)標(biāo)識(shí)與設(shè)計(jì)圖紙一致。 Before installation of the piping of the machine set and pump, check to make sure that the specifications, material and grades of the prefabricated pipe sections, 11 fittings, valves, gaskets and fasteners, as well as the code identification of the pipe sections correspond with those indicated in the drawings. 機(jī)組、機(jī)泵的管口應(yīng)將封閉物拆除，清理、檢查管密封面，核實(shí)機(jī)組、機(jī)泵管口法蘭結(jié)構(gòu)形式、等級(jí)同管道法蘭相匹配，向上的管口應(yīng)加鍍鋅鐵皮盲板，防止管道安裝時(shí)異物掉入機(jī)器內(nèi)部。 Sealing materials should be removed from the tubing ends of the machine sets and pumps. Check the sealing surface of the piping to make sure that structure and grade of the flanges at the tubing ends of the machine sets and pumps match with the piping flanges. Galvanized iron blinds should be fitted onto upward orifice to prevent foreign objects fro