老花一格线是一条长距离输油管线,于2004年8月3日停运,停运前一直在 .6oMPa左右的压力下长期运行,并且在2002年至2004年8月两年多的时间内 干线未发生过因腐蚀而泄漏或爆管事故,自管线大修以后,全线阴极保护系统运 行也比较平稳,事实说明原花一格线仍具备一定的承压能力"自新花一格线建成投 产后,老花一格线就处于闲置状态,为了充分利用老花一格线的输送能力和柴达木 丰富的天然气资源,报告对老花一格线改输天然气的可行性及其经济价值进行了 深入的研究,以便为是否进行改输天然气提供决策依据" 报告在研究中主要做了以下一些工作: ()l概述了老花一格输油管线的基本情况; (2)根据老花一格线大修及内检测有关数据对管道的承压能力和剩余寿命进 行了评估"结果表明管道还能承受3.06MPa以下的压力,并能继续使用: (3)根据相应的规范对钢管材质进行理化分析,判断其是否适应输送天然 气的技术要求"结果表明该管道的钢管能适应输送天然气; (4)对管线输气能力进行分析计算以确定其能否满足输气需求"计算表明 管道输气能力富余量很大; (5)对管线输气的经济价值进行了评价"经初步估算需要投资4550万元, 而老线改输天然气后,三年时间就可以收回全部投资" 关键词:花一格线;输油;天然气;可行性Abstraet TheoldHUA一GEPIPeline15alongdisnateeeurde011PIPeline诚htorund6MPa wokringPressurebeofrestoPPing,stoPPedonAugust3,2004.LekaageorPIPe burstingaceidenididnothpapenonitsmainlniesinee2002toAuugst,2004.The ehatodieProtectionsystemwasstbaleatferheavyerPair.Mnayafetsshowedhtathte oldPIPelniehdasomepressurizedbailiyt.Theoldonewasunusedatfernew HUA一GEPIPelineeonsturetednadPorduetion.TomkaeuseofhtertnasPorting bailiytofhteoldPIPelinenadhtegasresoureeofChaiDaMu,htisdissertation sutdieddePelyonhteefasibiliytnadeeonomiealvalueofhteoldPIPelineehnaged rfom011togastoPorvidedeeisionsuPPort. Tllemainwokrasofllows: (l)InortdueedhteoldHUA一GE011Pipeline; (2)EvaluatedhtePressurizedbailiytnadresidualliefaecodringtohteheavy erPairnadinnerinsPeetiondata.Theresultshoweditenawokredunderhet Perssureof3.06MPa: (3)Anal邓inghtephysieoehemiealpropertyofhtepipematerialaeeordingsome snatdards.DeeidingifhtePIPelinesatisyfinghtetechnologyeruqestofrgas rtnasPorting.TheresultshoweditenasatisfiedhtegasrtnasPortation demnad; (4)AnalyzingnadealeulatingthegasrtnasPortingbailiytoftheoldPIPelineto deeideifhtePIPelinesatis斤inghtetrnasPortationdemnad.Theealeulation showedhtePIPelineenatrnasPortgas初htbigbailiyt; (5)EvalUatnigheteconomiealvalueofgasrtnasPorting.Itneeds45.5million Yi,nxesmtent.IfhtePPielinewasgasPiPelnie,hteinvesmtenienabetkaen backni3years# Keywords:HUA一GEPIPeline:011PIPeline:gas:efasibiliyt目录 1绪论.................,........................................,................................................,..二1 1 . 1花一格输油管线概况........,...............................,.....................................1 1.2研究的目的........................................."......................................,..............1 1.3主要研究内容...........................................,.....................................................2 1.4主要技术路线.......................................................................................................2 1.5遵循的主要规范..................................................................................................3 2老管线的承压能力.........................................................,........................................4 2.1花一格管道腐蚀缺陷安全承压能力的计算.......................................................,二4 2.2花一格输油管道分段安全承压能力综合评定.....................................................7 .22.1花一格输油管道腐蚀状况分段...............................................................,.,7 .22.1关于管道分段承压能力综合评定的说明.........................,.................8 2 . 3小结..........,........................................,..,.......,..........................,二12 3花一格输油管道的剩余寿命评价.................................................................................13 3 . 1影响输油管道腐蚀剩余寿命的因素..............,........................................,二13 3.2相应模糊集的隶属函数..........................................................................,...14 3.3花一格管道剩余寿命的综合评定.................................................,...............15 3 . 4小结............................................................,..........................................,二19 4!管材的适应性............................................................................................................20 4.1取样情况..........................................................,...........................................20 4.2无损检测.........................................................................................................,二21 4.3理化性能...........................................,.............................,...................,二22 4.3.1化学成分..................................................................................,.....二22 4.3.2拉伸性能................................!.....................,.-.......,.............23 4.3.3夏比冲击韧性..........................................................................................26 4.3.4硬度测试.......................................................,..............................31 4.3.5金相组织分析........................................,...........................................31 4.3.6氢致开裂检验....................................,.........................................,..,34 4.3.7应力腐蚀行为检验..................................................................................37 4.4小结....................................................................................................................39 5输气能力及经济分析...................,........................:.........................................40 5.1输气能力计算.....................................................................................40 5.2天然气市场情况及经济分析......................,..................#..#.,.......40 5.3老线改输天然气工作量及费用预测.............................................,............40 6结论与建议..............................................................................................................42