操作員技術資料長輸管線內檢測開挖驗證點方案

長輸管線內檢測開挖驗證點方案一、概述長輸管線內檢測現(xiàn)場作業(yè)于10月上旬完成，至12月20日，根據(jù)報告，東線漏磁檢測共發(fā)現(xiàn)了4492處金屬損失特征，其中最深值為壁厚的53%，該最深的金屬損失特征位于絕對距離28421.5米處的，表現(xiàn)為環(huán)焊縫上的外部腐蝕。東線深度≥30%壁厚的金屬損失點為86處，檢測出的金屬損失特征在整個管道長度上都有分布，并且多數(shù)集中在05：00至07：00之間的時鐘方位上。另外漏磁檢測顯示東線環(huán)焊縫異常數(shù)據(jù)共有24處，但是均為環(huán)向長度200mm以下的環(huán)焊縫異常；東線幾何檢測顯示東線共有13處深度≥3%內徑的凹陷。西線漏磁檢測共發(fā)現(xiàn)了3906處金屬損失特征，其中最深值為壁厚的46%，該最深的金屬損失特征位于絕對距離20932.4米處的，也表現(xiàn)為環(huán)焊縫上的外部腐蝕（注：列表顯示西線最深值為壁厚的51%，位于絕對距離2824.1米處，此處還需要確認）。西線深度≥30%壁厚的金屬損失點為70處，金屬損失特征在整個管道長度上都有分布，并且多數(shù)集中在05：00至07：00之間的時鐘方位上。另外漏磁檢測顯示西線環(huán)向長度≥200mm的環(huán)焊縫異常數(shù)量為11處，最大環(huán)向長度達到750mm，11處環(huán)焊縫異常中10處集中在05：00至07：00之間的時鐘方位上；西線幾何檢測顯示東線共有4處深度≥3%內徑的凹陷。本報告將對東西線內檢測報告中嚴重缺陷點進行匯總，并經(jīng)過對缺陷點進行初步分類，推薦建議開挖點，以期對內檢測數(shù)據(jù)進行驗證。二、相關圖表、清單1、東線⑴東線金屬損失點分布圖該圖根據(jù)ASMEB13評價體系對所有缺陷點進行評價，主要根據(jù)管線參數(shù)、金屬缺陷深度、金屬缺陷長度及寬度進行計算，得到金屬損失點對于管線失效的風險位置。并將風險最大的點進行列表，推薦修故。金屬損失的開挖驗證點將在具有檢測單的點中選取。⑵凹陷點清單（灰色部分為推薦開挖驗證點；44700米處凹陷點比較集中，后四個凹陷點只需開挖一處。）環(huán)焊縫號編號脈沖距離特征屬性內徑[mm]時鐘方位14770106173302613799.08凹陷3.18%17.79mm485.304:0026510203306459724423.67含凹陷的橢圓變形5.50%/3.78%21.13mm483.407:1529300215340887127170.63凹陷3.08%17.23mm486.205:3029310216341117127188.99凹陷3.66%20.44mm482.205:4543980346512095740831.35凹陷3.20%17.90mm493.903:1544700354520512441502.92凹陷4.87%27.23mm473.901:0044700355520527441504.12凹陷5.97%33.37mm473.409:1544700356520555241506.34凹陷8.30%46.36mm447.301:4544720358520590241509.13凹陷4.50%25.13mm477.710:0044720359520608241510.56凹陷3.50%19.55mm487.109:1544720361520677841516.12凹陷5.04%28.16mm477.509:0044730362520695841517.55凹陷3.12%17.46mm489.810:1544730363520713841518.99凹陷4.28%23.94mm479.910:00⑶金屬損失清單（表中所列條目為深度≥30%壁厚的金屬損失，按損失深度排列；灰色部分為推薦開挖驗證點（4處）；主要為根據(jù)ASMEB13系統(tǒng)評估風險較大點并考慮不同類型的金屬損失特征）距離（米）評估結果損失深度（％壁厚）長度

(mm)ERF時鐘方位28421.5*EXTML（外部）53%2590.97805:3019690.1*INTMFG（內部）52%2210:3026826.0*INTMFG51%2209:1518317.4*INTMFG50%4108:0014572.8*INTMFG48%4802:1519555.9*INTMFG48%1309:0010474.8*EXTML47%990.82506:1518317.5*INTMFG47%1908:0011440.5*INTMFG46%1701:1526820.7*INTMFG46%2103:302399.6*EXTML45%2820.92705:4534346.3*EXTML45%270.72406:0035523.9*INTMFG45%1202:0034346.3*EXTML43%1580.86206:0046328.3*INTMFG43%1611:3026821.1*INTMFG42%1803:3039749.1*EXTML41%2280.88506:3013939.3*EXTML39%250.72001:0035188.6*INTMFG39%1303:0042382.1*EXTML38%550.74909:452532.5*INTMFG37%1802:4513225.7*INTMFG37%2009:0039720.1*INTMFG37%2312:154839.6*INTMFG36%1402:457266.3*INTMFG36%1312:4515199.5*EXTML36%160.71307:1528421.7*EXTML36%330.72505:0029807.0*INTMFG36%2911:3041395.9*INTMFG36%2109:30153.0*INTML35%240.71807:30188.7*INTML35%220.71605:4514691.4*INTMFG35%2007:4520243.9*EXTML35%170.71406:1535523.8*INTMFG35%2002:0039759.2*EXTML35%1760.83305:458496.5*INTMFG34%12704:3019555.7*INTMFG34%1709:0020100.4*EXTML34%780.76606:4520137.1*INTML34%120.71106:3032391.4*INTMFG34%1602:0040392.0*EXTML34%1200.79905:3046857.6*EXTML34%230.71707:002534.5INTMFG33%1609:007266.4*INTMFG33%1302:1518318.9INTMFG33%3508:1518862.0*EXTML33%260.71805:4528401.4*EXTML33%260.71806:1528421.6*EXTML33%1350.80407:3029807.1*INTMFG33%1711:3034335.6*EXTML33%1210.79605:1534335.7*EXTML33%210.71506:15150.6*INTMFG32%8801:15952.1*EXTML32%200.71504:152609.8*EXTML32%190.71404:453577.6*INTML32%450.73206:303954.4*INTML32%190.71406:458694.3*INTML32%130.71207:0034241.7*INTMFG32%1402:4539720.0*INTMFG32%2212:1541395.9*INTMFG32%1509:304767.1*EXTML31%150.71208:307700.7INTML31%340.72305:008734.9*INTMFG31%15110:159681.5*INTMFG31%1112:3010255.5*INTMFG31%3402:0010840.8*EXTML31%570.74206:4512412.5*INTMFG31%5610:0012416.0INTMFG31%2010:4528454.1*EXTML31%1000.77605:1534241.7*INTMFG31%1902:4546560.4*EXTML31%1880.81907:452436.5INTML30%280.71806:003021.2EXTML30%200.71402:155202.6INTML30%220.71505:3010525.8EXTML30%590.74209:3010985.3EXTML30%350.72301:0013231.2INTML30%130.71106:1514691.5*INTMFG30%1807:4519182.2*EXTML30%210.71503:0019240.6*INTMFG30%4401:3024535.6*EXTML30%450.73109:3024557.6*EXTML30%800.75902:1528971.0*INTMFG30%4712:3029032.9EXTML30%260.71706:3029035.6INTML30%130.71105:4542570.5EXTML30%580.74106:00⑷環(huán)焊縫異常清單（東線環(huán)焊縫異常點環(huán)向長度均小于200mm，根據(jù)12月24日會議協(xié)商結果，認為對于環(huán)向長度小于200mm的缺陷可以暫時不作處理。故對于東線的環(huán)焊縫異常點將不進行開挖驗證。2、西線⑴西線金屬損失點分布圖（同東線）⑵凹陷點清單（灰色部分為推薦開挖驗證點；）環(huán)焊縫號編號脈沖距離特征屬性內徑[mm]時鐘方位6101953486396.63凹陷3.36%18.80mm492.611:306202055052409.21凹陷3.83%21.38mm482.312:002020382088521641.12凹陷4.73%26.45mm487.706:0029930260351285428104.94凹陷3.52%19.64mm489.811:15⑶金屬損失清單（表中所列條目為深度≥30%壁厚的金屬損失，按損失深度排列；灰色部分為推薦開挖驗證點（4處））距離（米）評估結果損失深度（％壁厚）長度

(mm)ERF時鐘方位2824.1*INTMFG51%6704:0020932.4*EXTML46%760.79208:4528401.9*EXTML41%220.71805:3037289.4*INTMFG41%1511:1540574.6*EXTML41%490.74602:3037713.0*EXTML40%300.72508:4517875.0*INTMFG39%1404:301618.6*INTMFG38%2612:1520648.1*EXTML38%2920.88406:0037712.8*EXTML38%2690.87907:1526.9*INTML37%1510.83004:303591.7*INTMFG36%1105:3020871.7*EXTML36%360.72805:3029013.4INTMFG36%2011:453176.1INTMFG35%1208:3010783.9INTMFG35%1706:3011703.1INTMFG35%1202:3018719.5*INTMFG35%1309:0020881.7EXTML35%250.71805:1537350.4INTMFG35%2205:1542516.2*EXTML35%230.71711:4526.4*INTML34%290.72104:1520871.5*EXTML34%200.71505:304171.2INTMFG33%1208:308578.1*EXTML33%170.71305:4521305.4*EXTML33%140.71207:001375.7INTMFG32%1211:003407.1EXTML32%160.71312:305466.3INTMFG32%1303:158715.9INTMFG32%1412:3011998.5INTMFG32%1203:0011998.8INTML32%210.71505:3013450.7INTMFG32%1401:1520071.0EXTML32%140.71203:3020404.9INTMFG32%1702:0020839.2*EXTML32%330.72306:0021858.2EXTML32%110.71101:0022829.5*EXTML32%110.71112:4525317.6*EXTML32%210.71503:4526959.2*EXTML32%410.72906:00427.3INTMFG31%1809:003998.5INTMFG31%1105:003998.7INTMFG31%1306:0012072.0EXTML31%150.71210:1513661.2*INTMFG31%22906:4514693.0EXTML31%260.71806:0020891.8*EXTML31%190.71405:3024064.2*EXTML31%400.72803:0034073.3INTMFG31%1502:4537951.3INTMFG31%9308:3041583.4INTMFG31%1301:151117.6INTMFG30%1406:002351.1INTMFG30%1410:452973.1INTMFG30%1409:303173.8INTMFG30%3810:453372.3INTMFG30%1301:003376.0INTMFG30%1410:453377.0INTMFG30%1308:454507.6INTMFG30%13