上海克罗斯阀门有限公司 Shanghai CLOS Valve Co., Ltd

1. 上海克罗斯阀门有限公司 Shanghai CLOS Valve Co., Ltd Trevitest on-line valve testing 安全阀在线校验 Delivering improved valve efficiency 提高和改善阀门的工作效率

2. Trevitest on-line valve testing Why Trevitest?为什么要采用安全阀在线校验装置 Replacing the boiler float gives the following advantages代替水压测试,具有如下优点 • Reduction in fuel costs降低燃料成本 • Reduction in commissioning time减少系统试车时间 • Reduction in valve wear and tear减少阀门的磨损 • Reduction in vessel pressure excursions leading to longer life减少容器压力的偏离从而延长使用寿命 • Controlled testing at lower pressure在正常操作温度下进行实验,不需要温度补偿调整压力

3. Trevitest on-line valve testing Traditional set-point verification传统的阀门校验 Traditional set-point testing involves raising line pressure and recording the set-point of the valve传统的阀门校验需要提高在线压力和记录阀门的设定压力 • Limitations局限性 • Uneconomical - increased fuel costs不经济-增加了燃料成本 • Compromises plant safety - unnecessarily raising line pressure由于不必要的提高在线运行压力,影响系统安全 • Environmental - high levels of noise有噪声污染

4. Trevitest on-line valve testing What is Trevitest On-linevalve testing? 什么是安全阀在线校验 Trevitest is a system developed allow the set pressure of safety valves to be verified and recorded without the need to raise line pressure 安全阀在线校验装置 1979年出现,不必提高在线运行压力,就可以对安全阀的设定压力进行校正和记录.

5. Trevitest on-line valve testing The advantages of Trevitest For routine inspection: 对于正常检验而言 • Eliminates the need to shut down the process避免系统停车 • Valve re-certification on-line (set pressure verification)阀门的设定压力调整可在线进行 • Eliminates the need for temperature compensation由于在正常操作温度下进行实验，不需要温度补偿调整压力 • Enables valves to be aligned to delayed outages • Enables longer periods between outages to be planned For corrective action:对于校正活动而言 • Testing valve for operational readiness测试阀门为系统运行做准备 • Measuring valve lift可以测试阀门的起跳 • Provide good indications for valve’s blow-down settings可以指示出阀门的排放设定 • Provide good indication for spring performance可以指示弹簧性能 • Set pressure upgrading on-line upon plant requirement可根据工厂要求,提升设定压力 For safety:从安全性的角度 • Valve is free to operate with the mechanics in place.通过机械装置来操作阀门 • Remote operation typically 20m but can be extended可以２０米远的距离遥控操作．操作距离也可以延长． • Equipment available to work in hazardous areas设备可以在危险环境下工作 • Secure baseplate enables valve to be forced closed安全底板可以使阀门强制关闭．

6. Trevitest on-line valve testing Trevitest equipment in place onsafety relief valve

7. Trevitest on-line valve testing Calculations: Set pressure verification 安全阀设定压力校正的计算 TO DETERMINE SET PRESSURE确定设定压力 Pstt = Ftt/MSA + Pl Where: Pstt = set pressure as predicted by Trevitest设定压力 Ftt = force recorded by Trevitest 作用力 MSA = valve mean seat area阀门密封面的面积 Pl = pressure in line (zero for cold testing)  系统在线压力 TO DETERMINE VALVE SPRING ` ADJUSTMENT RATE (Pstt1 – Pstt2) / X Where: Pstt1 = first Trevitest set pressure Pstt2 = second Trevitest set pressure X = spring adjustment

8. Trevitest on-line valve testing Extended running andre-certification延长运行寿命 • Incorporating Trevitest as part of the valve overhaul strategy will increase intervals between shutdowns (benchmarking) and save customers time and money应用安全阀在线校验装置在阀门的维护方面，可以增加系统停车的间隔时间从而为客户节省时间和成本 • Valves can be recertified in-situ to allow a system to comply with plant regulations阀门可以在线校验从而使系统满足工厂的总体要求．

9. Trevitest on-line valve testing System pressure and back-pressure 带背压和不带背压的系统 • A major part of the Trevitest set pressure calculation is the line pressure. This must be accurately determined, typically +/- 0.5% • 安全阀设定压力计算的一个主要部分是系统压力．这必须精确确定．通常误差在＋／－０.5%. • Valves with no back pressure can be Trevitested无背压的阀门能够在线校验 • Valves with a back pressure can also be Trevitested, but they must have a bellows fitted带背压的阀门也可以在线校验.但必须附加一个波纹管.

10. Trevitest on-line valve testing Trevitest accuracy : Load cellcalibration rig 安全阀在线校验的精度保证,负荷单元工作原理

11. Trevitest on-line valve testing Trevitest Equipment:Recentdevelopments近期的发展 • Rugged computers used during the test • Data acquisition and management now computerised • Acoustic transducer added to monitor valve leakage and aid set pressure reading • Customer data base for all valves • Increased accuracy- set point can be magnified

12. Trevitest on-line valve testing What valves can be Trevitested? As a general rule: Valves 1” nb. and greater with a protruding spindle/stem. A low force rig may be used for very small valves – accuracy can be compromised Pilot operated valves equipped with field test port PV valve closed (normal position)

13. Trevitest on-line valve testing How to establish if a valve can be Trevitested?

14. Trevitest on-line valve testing Trevitesting valves with back pressure

15. Trevitest on-line valve testing Trevitest compatibility Example of valve information required to establish Trevitest compatibility

16. Incorporating the use of the Trevitest System with a valve overhaul strategy will save customer’s time and money; by increased intervals between shutdowns (Benchmarking) Valves can be re-certified in-situ to allow a system to comply with plant regulations Extended running and re-certification Trevitest on-line valve testing

17. Trevitest on-line valve testing Pre-requisite form Recessed spindle (as diagram B)

18. ADGAS UAE KNPC Kuwait Conoco Huntsman L.O.R. Esso Texaco Baker Petrolite Hydro Polymers British Gas British Energy BNFL/Magnox GPIC Bahrain QAFCO Qatar PDO Oman PGS Production (Banff) Bleo Holm Britannia Shell Expro:- (Gannet, North Cormorant, Cormorant Alpha) BHP Douglas Shell Stanlow BP Mobil/Exxon Transco Glaxo Smith Kline Trevitest on-line valve testing Companies using Trevitest