Problems found in Guangdong LNG pipeline construction 

      Guangdong Dapeng LNG project is a cooperation project between the Company and Shell, Shell management is a management model for the complete guidelines, people-oriented management of the strict security, security is not up to protesters rectification. 

      High-altitude operations require more standardized, more than 2 meters high above the ground is to be done to their standards. 2 m can be said is simply not fall, unless you want to jump off. Also extremely strict quality standards, a process inspection, there are several departments at the same time participate in acceptance. Take the pig, the other projects in the country in the number of times as much pig had never seen before. With their claims, as long as the company in accordance with and adapt to Mirs acceptance criteria required to do project management, project other domestic enterprises can adapt to the requirements of both. 

      The main focus of this project is to clean and vacuum drying pipe pressure test.Vacuum drying the equipment for me is little contact with the equipment, there is no construction experience to draw on, thanks to the efforts we have the success of the project. Huizhou refinery vacuum drying natural gas receiving terminal is the first project, the first use and debug, as close by refineries, electricity is more convenient, after consultations with Party A agrees to supply the refinery with electricity and oil phase much lower than the cost of electricity, the current is relatively stable, and therefore the process of using the device and no mechanical problems and downtime. 

       Dry Huizhou refinery construction is a chance to learn and gain experience, the dew point detector measurement data is not accurate, leading to the first acceptance of unsatisfactory. Of course there are other reasons, it is too believe that the vacuum drying equipment, nor take other measures, which is the main reason. After summing up experience: taking into account the water in a vacuum atomization, evaporation into the vapor, these gases in a confined space, there is no external force, does not form the circulation and flow, it has been stuck in the same place; if not to displace these gases, it is difficult to achieve the eligibility criteria. I think that the vacuum dryer equipment must be dry air or other drying gas equipment used in conjunction to achieve better results. 

       To actively participate in further work on the acceptance of water sweep, purge is not standard, a direct impact on the duration and quality of drying. Power plant construction in the high Po, found on the step construction operations did not meet acceptance criteria, the filter pipe and the station specified in the presence of water, clear water in a vacuum phenomenon prone to freezing and vacuum drying equipment to make them completely out of water volatilization, atomization process requires a time, such an action would significantly affect the progress of the project; this is the reason the design so that they can not be with out water from the air, even if the explosion can not be completely discharged from the purge. 

       During the drying process, strengthen the inspection process, inspection process are familiar with the station, the construction of various types of valves. Po power plant construction because of the high rain because the road is not completed in the battlefield, can not enter the construction site, so not a thorough inspection of all devices, so that the individual valve grease drain hole reach the required level of vacuum, direct affect the quality and duration of drying. In the vacuum dryer use, especially in the high Po power plants during the most obvious. As early on the process of checking is not enough, the grease drain hole, not the vacuum level has been reached, the internal leakage of the problem is resolved, the effect is very obvious, very quickly within the process of water evaporation, water vapor significantly from the vacuum pump gas discharge port. But close to the negative pressure 160pa - 100pa, the process where there will be frozen out of water, ice phenomena inside the container is clear, the container wall with drops of water condensation. As owners of the very tight schedule requirements, the kind of clear water treatment method is most simple, rapid, and do not have enough time to do the experiment (the container has been blasting the purge, this method is not obvious on the small amount of clear water; dry air purge also far from ideal, because most of them are out of water where dead, there is no discharge point, only by the vacuum drying method to clear the water slowly evaporate the main problem now is to clear the water freezes, melts, and then volatile has maintained a certain degree of negative pressure or not to clear the water freezes, it has remained volatile state, that method is more effective, to be discussed with the.) 

      Strengthening the training of new staff, it is best able to do certificates. Power plant construction in the high Po, also because of individual business unskilled workers, resulting in damage to instrument valve sealing bolts, adverse impact on the company. Let the company is a specialized company, such a thing is the fault of a non-professional, it is difficult to forgive this kind of thing to happen. 

      This is what we learn in the construction of that experience, and we hope to learn together, learn from each other and common progress for the next project better prepared to do better, for shortening the construction period, save money to do better and more thorough. 

      Please keep advice. 

                        

                                                                                                                        Project Manager: Chen Changxing 

                                                                                                                         November 4, 2008