标准管线氮气吹扫.doc

标准管线氮气吹扫（可编辑）
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氮气（N2）管线吹扫方案

一、编制依据
1、尿素装置的PID图；
2、尿素生产工艺的基本原理；
3、尿素动静设备工作的基本原理；
4、化工生产的安全技术规范。
二、吹扫目的及技术要求
1、目的：
1.1. 检查N2管网是否畅通。检查管网配管是否有疏漏；检查管网中的法兰，阀门、仪表等的接口处，填料压盖等是否有泄漏。
1.2.由于管道施工及设备制造过程中残留的杂物，如：焊渣沉积物、在管道及设备内表面的氧化皮、颗粒物、附于其内壁的泥砂杂物、油脂、焊渣和锈蚀物等。在工艺管道及设备投用前，必须进行彻底地清除，保证管道、设备的清洁，避免引起发生的堵塞管道、设备；损坏机器、阀门和仪表；玷污催化剂及化学溶液、影响产品质量保证化工投料的顺利进行及安全生产。
2、技术要求：
2.1. 0.7Mpa（A）、25℃的N2用于吹扫各N2管网线；
2.2.吹扫的空气流速≥30m/s。
2.3. 吹扫时，应将管道上安装的所有仪表测量元件（如流量计、孔板等）拆除，防止吹扫时流动的赃物将仪表元件损坏，同时，还应对调节阀采取保护措施；
2.4. 吹扫时，必须在换热器、塔器等设备入口侧加盲板，只有待上游吹扫合格后方可进入设备，一般情况下换热器本体不参加空气吹扫；
2.5.吹扫时原则上不得使用系统中的调节阀作为吹扫的控制阀，如需控制系统吹扫风量时，应选用临时吹扫阀门，吹扫时，应将安全阀与管道连接处断开，并加盲板或挡板，以免脏杂物吹扫到阀底，使安全阀底部密封面磨损；
2.6.系统吹扫时，所有的仪表引压管线均应打开进行吹扫，并应在系统综合气密实验中再次吹扫；
2.7.所有的放空火炬管线和导淋管线，应在与其连接的主管后进行吹扫，设备壳体的导淋及液面计、流量计引出管和阀门等都必须吹扫；
2.8.在吹扫进行中只有上游系统合格后，吹扫空气才能通过正常流程进入下游系统；
2.9. 当管道直径大于500mm和有人孔的设备,吹除前先要用人工清扫,并拆除其有碍吹扫的内件；
2.10.所有罐、塔、反应器等容器,在系统吹扫合格后应再进行人工清扫,并复位相应的内件；
2.11.检查系统内所有管道管卡安装完毕，配备合理，确保吹除过程中不会发生管道震动现象。
2.12如果管线上或机泵的进口有过滤器,应抽掉滤网或拆掉过滤器.
2.13、吹洗时，除有色金属管道外，应用锤（不锈钢管用木锤）敲打管子，对焊缝、死角和管底等部位应重点敲打，但不得损伤管子；
3、吹扫方法方法及合成标准
3.1.吹扫方法
. 与各工段联接部位必须加盲板堵死，待吹除使用时一一拆除，防止带杂物的气体进入其它工序，吹扫按照（前）先总管，后支管的顺序进行。
.吹扫中同时要将导淋管、仪表引压管、分析取样管等进行彻底，防止出现死角；
.吹扫采用在各个排放口连续排放的方式进行。并以木锤连续敲击管道，特别是对焊缝和死角等部位应重点敲打，但不得损坏管道，直至吹扫合格为止；
.吹扫时，要缓慢向管道送气，当检查排出口有空气排出时，方可逐渐加大气量至要求量进行吹扫，以防因阀门、盲板等不正确原因造成系统超压；
3.2.合格标准
每段管线或系统吹扫是否合格，应由生产和安装人员共同检查。当目视排气清净和无杂色杂物时，在排放口用白布或涂有白铅油的靶板检查，如五分钟内无铁锈、尘土、水分及其他赃物和麻点即为吹扫合格。
三、吹扫应具备的条件
1、吹扫范围
尿素装置所有的N2管网，详见附后的N2管网图。
2具备条件
2．1 2.1. N2管网系统管道安装竣工，强度试压合格；N2管网进尿素界区前总管已吹扫合格。
2.2.吹扫管道中的孔板、转子流量计等已抽出内件后安装复位，压差计、液面计、压力计等根部阀处处于关闭状态；
2.3.禁吹的设备、管道、机泵、阀门等已装好盲板；
2.4.供吹扫用的临时配管、阀门等施工安装完成；
2.5.需要吹扫的工艺管道一般暂不保温，因为吹扫时需用木锤敲击管道外壁；
2.6.提供吹扫空气气源的压缩机已空运转，公用工程满足压缩机具备连续供气条件；
2.7.绘制好吹扫流程图，图上应标出吹扫程序、流向、排气口、临时管线、临时阀门等和事先要处理的内容；
2.8. 如果晚上工作，应考虑现场照明条件，需要时应预先安排好现场临时照明灯。
2.9.准备好用户、施工单位和试车执行部门三方代表签署的吹扫记录表，以便吹扫时填写；
2.10.消防和气体防护器材、可燃气体报警系统、放射性物质防护设施已经按设计施工完毕并处于完好状态。
2.11.岗位尘、毒、噪声检测点已确定。
2.12.岗位责任制已经制订完善。
2.13.试车方案、操作规程和操作法已经编写完成并已印发生产试车人员。
2.14.生产试车人员已经培训并考核合格，持有上岗作业证。
2.15.熟悉PID图和试车方案，掌握试验规程，并了解吹扫过程中的操作要点及安全注意事项。
2.16.试车所需备品、备件准备妥当。
四、吹扫前的准备工作
1、人员准备
1.1.成立试车组，明确分工，进行技术准备；全体参加吹扫的人员必须熟知吹扫方案和N2管网图。
1.2. 在吹扫过程中，所有人员应服从指挥，尽职尽责。统计好检查点，并列出明细表，试验时派专人记录。（见记录表）。
2、验所需物资、工器具、安全防护和劳保用品准备
名称
铁锤
木锤
爬梯
手套
脚手架
数量
四把，
四把
3个
20副
临时搭建
名称
白布
木板
耳塞
扳手
管钳
数量
30米
若干块
10副
5套
5把
名称
靶牌
铁丝
拆卸部件

数量
0.5m2
10kg
拆卸部件一览表

五、吹扫程序（吹扫示意图见附图）
1、吹扫前准备
1.1.检查管网中所有的管道、仪表、阀门是否正确，且符合要求。
1.2.检查关闭管网中的所有切断阀。调节阀用短管代替。
1.3.检查管网中的盲板，短接、+临时管按吹扫图安装就位且紧固。
1.4.用进界区总阀控制吹扫所需的N2量，防止超压。
2、吹扫步骤：
2.1.N2入尿素装置截止阀关闭，拆N2入装置管线对接法兰，加挡板，由界区向装置内吹扫，吹净的清洁度用软铝皮检查，软铝皮无吹打痕迹即可。吹扫合格后法兰恢复。
2.2.将N2管网其他所有支路阀关死。打开总管末端，用总阀开始吹扫总管线N92801-3＂（1P1）-N（30），吹扫合格后恢复。
2.3.然后按照以上吹扫方法分别对N2管网其他所有支路的吹扫，逐步打开各支路切断阀，分别进行吹扫合格后，关切断阀将法兰复位。
2.4.需要吹扫的N2管网支路管线有：
N92801-3＂（1P1）-N（30）到US-0601 EL100000
N92802-1＂（1P1）-N（30）到US-0607 EL110900
N92803-1＂（1P1）-N（30）到US-0606 EL110900
N92804-1＂（1P1）-N（30）到US-0609 EL118000
N92805-1＂（1P1）-N（30）到US-0604 EL100000
N92806-1＂（1P1）-N（30）到US-0605 EL100000
N92807-1＂（1P1）-N（30）到US-0606 EL103000
N92808-1＂（1P1）-N（30）到US-0602 EL100000
N92809-1＂（1P1）-N（30）到US-0603 EL100000
N92810-1＂（1P1）-N（30）到US-0601 EL100000
N92811-1＂（1P1）-N（30）到US-0610 EL118000
N92812-1＂（1P1）-N（30）到US-0611 EL124500
N92902-1＂（1P1）-N（30）到US-06012 EL129500
N92903-1＂（1P1）-N（30）到US-0613 EL110900
N92904-1＂（1P1）-N（30）到US-0615 EL124500
N92904-1＂（1P1）-N（30）到US-0614 EL118000
N92905-1＂（1P1）-N（30）到US-0616 EL155000
六、作业后处理
系统吹扫合格后，拆除盲板，恢复所有仪表、阀门到正常位置。
七、安全注意事项：
1、注意事项
1.1. 吹扫气体排放区应立警示标志并且临时性用绳子隔离。
1.2. 禁止靠近受影响的区域，注意受吹扫气体影响的电器、仪表、设备情况，采取必要的遮挡措施。
1.3. 所有参加吹扫工作的人员必须使用个人防护用品（包括耳塞、布工作服、皮革手套、劳保皮鞋、安全帽、防护眼镜等）。
1.4. 所有被吹扫的管道尤其是吹扫气体排放口必须要支撑和固定，排放气体应直接送到能够承受气体吹扫且结构坚固的气体排放口,如果需要可安装临时弯头和排汽管。
1.5. 吹扫时所加堵板必须认真记录清楚，吹除完毕一一拆除。
1.6. 防止管道甩动或位移，杜绝发生人员伤亡及设备损坏的事故。
1.7.方案实施过程中必须严格执行现场施工操作的相关安全规定。
2、风险辨识及防范措施

危害因素
可能导致的事故
伤害人员
防范措施
1
地沟盖板缺失
扭伤
操作人员
地沟盖板完好
2
未戴安全帽
头部受伤
操作人员
戴上
3
护拦损坏
坠落摔伤
操作和检修人员
护拦完好
4
漏氮
窒息
操作和检修人员
戴长管和远离
5
开关阀门不当
扭伤
操作人员
正确操作
6
楼梯平台有冰、水、油
摔伤
操作人员
清理
7
高空作业
坠落
操作人员
戴安全带

八、作业记录
拆、卸部件表
序号
位置
尺寸
拆除
时间
恢复
时间
负责人
备注
1
N92801-3＂（1P1）管线总阀前法兰
3＂

2
N92801-3＂（1P1）总管线末端
1＂

九、作业结果报告
试车作业结果报告
名称：
年 月 日
装置、车间、工段或生产系统名称：
试车时间： 自 年 月 日起至 年 月 日
试车情况：

试车结果评定：

附件：

建设单位签章

现场代表：

设计单位签章

现场代表：

施工单位签章

现场代表：

十、作业附件
1、相关单位工作联络单
2、相关安全作业票
3、相关图纸及设备档案
氮气（N2）
US-0007 EL110900
US-0611
EL124500

US-0615 EL124500

US-0616
EL155000

US-0608 EL110900
US-0609 EL118000
US-0610 EL118000

US-0601
EL100000
US-0602 EL100000
US-0603 EL100000
US-0604 EL100000
US-0605 EL100000
US-0606 EL103000
US-0612 EL129500
US-0613 EL110900
US-0614 EL118000
PI9801

（英文版 ）
Two regulations promulgated for implementation is in the party in power for a long time and the rule of law conditions, the implementation of comprehensive strictly strategic plan, implementation in accordance with the rules and discipline to manage the party, strengthen inner-party supervision of major initiatives. The two regulations supporting each other, the < code > adhere to a positive advocate, focusing on morality is of Party members and Party leading cadres can see, enough to get a high standard; < rule > around the party discipline, disciplinary ruler requirements, listed as "negative list, focusing on vertical gauge, draw the party organizations and Party members do not touch the" bottom line ". Here, the main from four square face two party rules of interpretation: the first part introduces two party Revised regulations the necessity and the revision process; the second part is the interpretation of the two fundamental principles of the revision of laws and regulations in the party; the third part introduces two party regulations modified the main changes and needs to grasp several key problems; the fourth part on how to grasp the implementation of the two regulations of the party. < code > and < Regulations > revised the necessity and revised history of the CPC Central Committee the amendment to the Chinese Communist Party members and leading cadres honest politics several guidelines > and < Chinese Communist Party discipline and Punishment Regulations > column 1 by 2021 to strengthen party laws and regulations focus. Two party regulations revision work lasted a Years, pooling the wisdom of the whole party, ideological consensus, draw historical experience, respect for the wisdom of our predecessors which reflects the unity of inheritance and innovation; follow the correct direction, grasp the limited goals, adhere to the party's leadership, to solve the masses of the people reflect a focus on the problem. The new revision of the < code > and < rule >, reflects the party's 18 and the eighth session of the third, the spirit of the fourth plenary session, reflecting the experience of studying and implementing the General Secretary Xi Jinping series of important speech, reflects the party's eighteen years comprehensive strictly practice. (a) revised two regulations of the party need of < the ICAC guidelines > in < in 1997 Leaders as members of the Communist Party of China clean politics certain criteria (Trial) > based on revised, the promulgation and implementation of January 2021, to strengthen the construction of the contingent of leading cadres play an important role. But with the party to manage the party strictly administering the deepening, has not been able to fully meet the actual needs. Content is too complicated, "eight prohibition, 52 are not allowed to" hard to remember, and also difficult to put into practice; the second is concisely positive advocated by the lack of prohibited provisions excessive, no autonomy requirements; the third is banned terms and discipline law, both with the party discipline, disciplinary regulations repeat and Criminal law and other laws and regulations repeat; the fourth is to "clean" the theme is not prominent, not for the existing problems, and is narrow, only needle of county-level leading cadres above. < rule > is in 1997 < Chinese Communist Party disciplinary cases (Trial) > based on revision, in December 2003 the promulgation and implementation, to strengthen the construction of the party play very important role. Along with the development of the situation, which many provisions have been unable to fully meet the comprehensive strictly administering the practice needs. One is Ji law, more than half of the provisions and criminal law and other countries laws and regulations Repetition; two is the political discipline regulations is not prominent, not specific, for violation of the party constitution, damage the authority of Party Constitution of misconduct lack necessary and serious responsibility to pursue; third is the main discipline for the leading cadres, does not cover all Party members. Based on the above situation, need to < the criterion of a clean and honest administration > and < rule > the two is likely to be more relevant regulations first amendment. By revising, really put the authority of Party discipline, the seriousness in the party tree and call up the majority of Party members and cadres of the party constitution of party compasses party consciousness. (II) two party regulations revision process the Central Committee of the Communist Party of China attaches great importance to two regulations revision . Xi Jinping, general books recorded in the Fifth Plenary Session of the eighth session of the Central Commission for Discipline Inspection, on the revised regulations < > made clear instructions. According to the central deployment, the Central Commission for Discipline Inspection from 2021 under six months begin study two regulations revision. The Standing Committee of the Central Commission for Discipline Inspection 4 review revised. Comrade Wang Qishan 14 times held a special meeting to study two regulations revision, amendment clarifies the direction, major issues of principle, path and target, respectively held a forum will listen to part of the province (area) secretary of the Party committee, Secretary of the Discipline Inspection Commission, part of the central ministries and state organs Department
The first party committee is mainly responsible for people, views of experts and scholars and grassroots party organizations and Party members. Approved by the Central Committee of the Communist Party of China, on 7 September 2021, the general office of the Central Committee of the Party issued a notice to solicit the provinces (autonomous regions, municipalities) Party, the central ministries and commissions, state ministries and commissions of the Party (party), the General Political Department of the military, every 3 people organization of Party of two regulations revision opinion. Central Commission for Discipline Inspection of extensive solicitation of opinions, careful study, attracting, formed a revised sent reviewers. In October 8 and October 12, Central Committee Political Bureau Standing Committee and the Political Bureau of the Central Committee After consideration of the two regulations revised draft. On October 18, the Central Committee of the Communist Party of China formally issued two regulations. Can say, two laws amendment concentrated the wisdom of the whole party, embodies the party. Second, < code > and < Regulations > revision of the basic principles of two party regulations revision work and implement the party's eighteen, ten eight plenary, the spirit of the Fourth Plenary Session of the Eleventh Central Committee and General Secretary Xi Jinping important instructions on the revised < low political criterion > and < Regulations >, highlighting the ruling party characteristics, serious discipline, the discipline quite in front of the law, based on the current, a long-term, advance as a whole, with Bu Xiuding independent < rule > and < rule >. Main principle is: first, adhere to the party constitution to follow. The constitution about discipline and self-discipline required specific, awaken the party constitution of party compasses party consciousness, maintaining the authority of the constitution. General Secretary Xi Jinping pointed out that "no rules, no side round. Party constitution is the fundamental law, the party must follow the general rules. In early 2021 held the eighth session of the Central Commission for Discipline Inspection Fifth Plenary Session of the 16th Central Committee, Xi Jinping again pointed out that constitution is the party must follow the general rules, but also the general rules." the revision of the < code > and < rule > is Method in adhere to the regulations established for the purpose of combining rule of virtue is to adhere to the party constitution as a fundamental to follow, the constitution authority set up, wake up the party constitution and party rules the sense of discipline, the party constitution about discipline and self-discipline specific requirements. 4 second is to adhere to in accordance with the regulations governing the party and the party. The Party of rule of virtue "de", mainly refers to the party's ideals and beliefs, excellent traditional style. The revised the < code > closely linked to the "self-discipline", insisting on the positive initiative, for all members, highlight the "vital few", emphasized self-discipline, focusing on the morality, and the majority of Party members and the ideological and moral standards. The revised < > Ji method separately, Ji, Ji Yan to Method, as a "negative list", emphasizing the heteronomy, focusing on vertical gauge. Is this one high and one low, a positive reaction, the strict party discipline and practice results transformation for the integration of the whole party to observe moral and discipline requirements, for the majority of Party members and cadres provides benchmarking and ruler. Third, insist on to. In view of the problems existing in the party at the present stage, the main problems of Party members and cadres in the aspect of self-discipline and abide by the discipline to make clearly defined, especially the party's eighteen years strict political discipline and political rules, organization and discipline and to implement the central eight provisions of the spirit against the four winds and other requirements into Disciplinary provisions. Not one pace reachs the designated position, focusing on in line with reality, pragmatic and effective. After the revision of major changes, major changes in the < code > and < rule > modified and needs to grasp several key problems (a) < code > < code > adhere to according to regulations governing the party and party with morals in combination, for at the present stage, the leadership of the party members and cadres and Party members in existing main problems of self-discipline, put forward principles, re