性能的阀门；⑶结构紧凑、体积较小，并具有抗蚀性能和耐磨损的阀门；⑷适用于长输管线大口径的阀门和输送液
xing neng de fa men jie gou jin cou ti ji jiao xiao bing ju you kang shi xing neng he nai mo sun de fa men shi yong yu chang shu guan xian da kou jing de fa men he shu song ye
求管线阀门有以下特点和功能：⑴具有良好密封性能的阀门（适应各种介质和多变的工况条件）；⑵具有良好防火
qiu guan xian fa men you yi xia te dian he gong neng ju you liang hao mi feng xing neng de fa men shi ying ge zhong jie zhi he duo bian de gong kuang tiao jian ju you liang hao fang huo
主要执行美国石油学会标准api6d规范，并符合相应的产品标准。（一）从长输管线用阀的发展趋势来看，要
zhu yao zhi hang mei guo shi you xue hui biao zhun api6d gui fan bing fu he xiang ying de chan pin biao zhun yi cong chang shu guan xian yong fa de fa zhan qu shi lai kan yao
。阀门的驱动方式有：手动、电动、气动、液动、电-液联动、气-液联动等多种驱动形式。国外，长输管线用阀
fa men de qu dong fang shi you shou dong dian dong qi dong ye dong dian - ye lian dong qi - ye lian dong deng duo zhong qu dong xing shi guo wai chang shu guan xian yong fa
要为：平板闸阀、球阀、紧急切断球阀、止回阀、快速球型调节阀等。阀门的连接形式为：法兰连接和对接焊两种
yao wei ping ban zha fa qiu fa jin ji qie duan qiu fa zhi hui fa kuai su qiu xing diao jie fa deng fa men de lian jie xing shi wei fa lan lian jie he dui jie han liang zhong
安全保护作用；②在管线起点站和中间增压站内，起控制介质输送的作用。国外，长输管线上选用量最大的阀门主
an quan bao hu zuo yong zai guan xian qi dian zhan he zhong jian zeng ya zhan nei qi kong zhi jie zhi shu song de zuo yong guo wai chang shu guan xian shang xuan yong liang zui da de fa men zhu
管线上需要大量的阀门。长输管线上的阀门，主要有两种用途：①在干线和各系统的出入口处，起启闭切断作用和
guan xian shang xu yao da liang de fa men chang shu guan xian shang de fa men zhu yao you liang zhong yong tu zai gan xian he ge xi tong de chu ru kou chu qi qi bi qie duan zuo yong he
配套产品的标准制定、东莞社保产品性能检验等工作。二、长输管线用阀概况利用长输管线输送需控制介质的流动，因而在
pei tao chan pin de biao zhun zhi ding dong guan she bao chan pin xing neng jian yan deng gong zuo er chang shu guan xian yong fa gai kuang li yong chang shu guan xian shu song xu kong zhi jie zhi de liu dong yin er zai
线起步早、发展较快，我国还没有大口径的长输管线，大口径的长输管线的建设处于起步阶段，因此，须认真做好
xian qi bu zao fa zhan jiao kuai wo guo hai mei you da kou jing de chang shu guan xian da kou jing de chang shu guan xian de jian she chu yu qi bu jie duan yin ci xu ren zhen zuo hao
阀门更高，管东莞社保线阀门要具有更高的强度和更好的密封性能、更高的使用寿命、作快速轻便、维修方便。国外长输管
fa men geng gao guan dong guan she bao xian fa men yao ju you geng gao de qiang du he geng hao de mi feng xing neng geng gao de shi yong shou ming zuo kuai su qing bian wei xiu fang bian guo wai chang shu guan
的阀门。长输管线经过沙漠、雨林沼泽、山地、平原，所经地区气候恶劣、环境条件差，因此对阀门的要求比通用
de fa men chang shu guan xian jing guo sha mo yu lin zhao ze shan di ping yuan suo jing di qu qi hou e lie huan jing tiao jian cha yin ci dui fa men de yao qiu bi tong yong
30千米一段距离的管路上，还需设置一个紧急切断阀、电动阀或气动阀等阀门。可见一条长输管线上将使用很多
30 qian mi yi duan ju li de guan lu shang hai xu she zhi yi ge jin ji qie duan fa dian dong fa huo qi dong fa deng fa men ke jian yi tiao chang shu guan xian shang jiang shi yong hen duo
各类灾害和事故的影东莞社保响，长距离油气输送管道可能会产生断裂、油气外漏、起火爆炸等问题，长输管线每隔20～
ge lei zai hai he shi gu de ying dong guan she bao xiang chang ju li you qi shu song guan dao ke neng hui chan sheng duan lie you qi wai lou qi huo bao zha deng wen ti chang shu guan xian mei ge 20
8mpa。长输管线在起点站、中间增压站、干线上和各系统的出入端等处需设置启闭和控制的阀门。因可能受到
8mpa chang shu guan xian zai qi dian zhan zhong jian zeng ya zhan gan xian shang he ge xi tong de chu ru duan deng chu xu she zhi qi bi he kong zhi de fa men yin ke neng shou dao
益。国外，长输管线东莞社保直径大于1米的管道长度约占总长度的80%。最大管径为1420毫米，最高压力为11.
yi guo wai chang shu guan xian dong guan she bao zhi jing da yu 1 mi de guan dao chang du yue zhan zong chang du de 80% zui da guan jing wei 1420 hao mi zui gao ya li wei 11.
情况下，建一条大口径管道比建几条小口径管道更为经济；而且在一定范围内提高介质的输送压力同样能够增加效
qing kuang xia jian yi tiao da kou jing guan dao bi jian ji tiao xiao kou jing guan dao geng wei jing ji er qie zai yi ding fan wei nei ti gao jie zhi de shu song ya li tong yang neng gou zeng jia xiao
气输送管线总长度约140万公里，占总东莞社保长度的二分之一以上。从国外的建设和运行的经验来看，在同样输送量的
qi shu song guan xian zong chang du yue 140 wan gong li zhan zong dong guan she bao chang du de er fen zhi yi yi shang cong guo wai de jian she he yun hang de jing yan lai kan zai tong yang shu song liang de
%以上采用管道输送方式。据统计，目前世界上已有油、气长距离输送管线总长度超过260万公里，其中，天然
% yi shang cai yong guan dao shu song fang shi ju tong ji mu qian shi jie shang yi you you qi chang ju li shu song guan xian zong chang du chao guo 260 wan gong li qi zhong tian ran
最主要手段。世界上主要油气生产国和消费东莞社保国都大量使用长输管线来解决油气资源的运输问题，天然气的输送95
zui zhu yao shou duan shi jie shang zhu yao you qi sheng chan guo he xiao fei dong guan she bao guo dou da liang shi yong chang shu guan xian lai jie jue you qi zi yuan de yun shu wen ti tian ran qi de shu song 95
管道输送已成为当代能源运输的主要方式，利用长距离管道输送油、气、煤等资源已成为当今世界解决能源输送的
guan dao shu song yi cheng wei dang dai neng yuan yun shu de zhu yao fang shi li yong chang ju li guan dao shu song you qi mei deng zi yuan yi cheng wei dang jin shi jie jie jue neng yuan shu song de