供应杜瓦瓶静态蒸发率测试仪,专业厂家直销，杜瓦瓶车用瓶检测设备 ,工艺成熟,专业生产厂家自荐,江苏华东空分设备为你提供成套lng钢瓶成套检测设备, 包含询问单,残液回收,氮气置换,阀门检测检修,夹层真空度检测及补抽真空,静态蒸发率检测,气密性检测,等成套检测设备, 工艺流程国内, 系统成熟, 操作简单, 在线检测. 欢迎新老客户点评及来电咨询.  
  低温绝热lng气瓶成套检测工艺说明                                                             
一、准备工作                                                                          
        检测现场要求远离明火或电火花10米以上                                                              
        禁止吸烟、明火、放置多用途的电器,保持检验现场区域的良好通风，避免阳光直射，且不允许存在振动的环境     
二、确认单                                                                     
         "气瓶原始资料审查，并记录:制造单位、气瓶编号、制造年月、气瓶型号、公称工作压力、公称容积、气瓶净重、
较大充液重量、上次定期检验日期、气瓶所属车辆的车牌号等"                                                          
         "气瓶使用历史信息，包含气瓶碰撞、维修、改造记录;气瓶安全附件、管路、阀门的维修及更换记录;
气瓶其他使用过程中出现过的异常记录"                                                              
三、外观检测                                                                          
         检查气瓶的结构、几何尺寸                                                                
         检查气瓶封头形式、接头形式、焊缝布置、管口方位、开孔方式与位置                                                  
检查焊缝较大对口错边量、焊缝较大棱角度是否符合GB24159-2009《焊接绝热气瓶》规定    
四、气瓶组合部件及安全附件检测                                                                     
         组合部件是指: 气瓶上的充液阀、燃料开头阀、气相关闭阀、调压节流阀及其与气瓶本体连接的管路              
         检查气瓶组合部件是否有外观磨损 参考资料《TSG R0006-2014 气瓶安全技术监察规程》 
         安全附件是指: 气瓶上的一级安全阀、二级安全阀、安全阀排放管、真空抽口、压力表及液位计等
                   检查所有安全阀压力表是否有超期未校验                                                       
                   检查一级安全阀导管是否存在脱落                                                                 
五、残液回收                                                                          
         将气瓶内残液回收干净                                                                
         设备清单：     2支以上lng气瓶，用于深冷液周转                                                 
                   气瓶移动支架2台                                                       
                   连接软管                                                       
                   综合操作平台移动台车1辆                                                       
六、氮气置换                                                                          
         将氮气填充将残余气态天然气置换干净                                                            
         置换次数一般为3次                                                            
         置换完成后用可燃气体探测仪来检测是否置换干净,若超标则需持续置换，直至探测仪测量结果显示达标     
         设备清单：     高压氮气集装格1套，提供氮气气源                                                       
                   可燃气体浓度检测仪1台                                                   
                   连接软管                                                       
                   综合操作平台移动台车1辆                                                       
                                                                          
七、气瓶组合部件及安全附件维修                                                                     
         所有组合部件阀门,使用时间若不能满足下一次年检时间要求的, 需全部更新新件，不可翻新       
 安全阀校验及更换                                                                
         设备清单：     安全阀校验台1套                                                       
                   角阀试验台1套                                                   
                                                  
                                                                          
八、气密性测试                                                                     
         使用高压氮气充装，压力1.6MPa,保压时间15分钟，采用涂抺皂水对如下气瓶管路及阀门进行气密性检测                                                                
                   检查液位传感器对接弯头地方是否有泄漏            按照GB/T12137《气瓶气密性试验方法》
                   检查充液管路单向阀对接接头地方是否有泄漏                                                       
                   检查液位传感器连接外套地方是否有泄漏         
         判定标准:  检查时未发现泄漏或形成气泡为慢慢积聚且气泡尺寸小于10mm,未出破烈；或几分钟后出现的小气泡， 均为气密性测试合格。                                                       
         设备清单：     高压氮气集装格1套，提供氮气气源                                                       
                   氮气增压机1套                                                   
                   连接软管                                                       
                   气密性检测装置1套                                                   
                   综合操作平台移动台车1辆                                                       
                   氦质谱检漏仪1台                                                       
                                                                          
九、气瓶夹层真空度测量                                                                     
         使用专项使用真空度测量仪表或设备进行测量                                                                
         测试过程及测量数量按照GB/T18443.2-2010《真空绝热深冷设备性能试验方法 第2部分:真空度测量》文件要求                                                              
         测量方法         常温真空度              瓶体未注入深冷液                                    
         设备清单：     夹层抽真空系统1套                                                   
                   综合操作平台移动台车1辆                                                       
                                                                          
十、气瓶夹层真空度维修                                                                     
         使用专项使用抽真空设备对气瓶夹层进行补抽真空，将真空度恢复到气瓶出厂值                                                            
         设备清单：     夹层抽真空系统1套                                                   
                   综合操作平台移动台车1辆                                                       
                                                                         
十一、静态蒸发率测试                                                                          
         "测试过程及测量数量按照GB/T18443.5-2010《真空绝热深冷设备性能试验方法 第五部分:静态蒸发率测量》文件要求进行"               
         测试方法采用气体质量流量计方法                                                            
         测试介质采用液氮                                                                
         判定标准:    1.气瓶日静态蒸发率应不大于2倍的制造标准规定的合格指标，且不大于如下表1的指标为合格        表1 车用LNG气瓶日静态蒸发率合格指标                                                               
         公称容积L      50     100  150  200  250  300  350
         日静态蒸发率%      5.4   5.1   5.1   4.8   4.8   4.8   4.5
         此标准由各省质量技术监督局制定                                                            
                                                                                                                                                  
十二、合格气瓶打印标签                                                                     
         检测合格的气瓶需按《TSG R0006-2014 气瓶安全技术监察规程》的规定在气瓶瓶体打印本次检验钢印     
十三、气瓶检测报告                                                                     
         依检验报告样本出具本次检测报告,气瓶使用单位和检测机构各保存一份                                                          
                                                                          
十四、其它                                                                     
         检验安全注意事项                                                                
         1.车用焊接绝热气瓶装载介质为液化天然气，温度为零下162度，沸点为常温，检验过程中要避免冻伤                                                             
         2.天然气为可燃气体，在空气中的燃烧混合比为5%～15%，检验现场远离明火，火星及超过摄氏649度的高温区域
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