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Wysłany: Pon 20:34, 17 Sty 2011
Temat postu: moncler pas cher River heavy crude oil storage and
River heavy crude oil storage and transportation system, cathodic protection
Before running well. Kuqa terminal station of cathodic protection system in early 2005 and put into operation, tank protection potential of design requirements, test cases according to the site has been proposed corrective measures. Line part of the cathodic protection system problems potentiostat, the cathodic protection station is not put into operation. Planted in a fixed place for the sacrificial anode supporting pier, so some protection potential lines one by one for a 1.2 1.4V, along the line can achieve good protection. River's first stand during the initial production 5.1, 3 potentiostat output current is 30A so the output voltage is 25V. After 1 years of operation the current 3-1.074V; 4 potentiostat output: 0.2A/1.2V; control potential: a 1.05V: cathodic protection potential of the protection of the monitoring points are as follows: Monitoring Point 1: A 0.981V monitoring points 2: a 1.025V monitoring point 3: a 0.989V monitoring point 4: a 1.164V monitoring point 5: a 0.973V monitoring point 6: 0.908V monitoring points for a 7: I 1. o73V monitoring points 8: 9 monitoring points for a 1.034V: 0.950V monitoring points for a 10: a terminal station in Kuqa 0.984V5.3 l potentiostat output 25A/80V, potentiostat output 20A/80V 2 . Protection of cathodic protection potential of the monitoring points are as follows: 22 Wang Lifen: oilfield heavy crude oil storage and transportation system, cathodic protection monitoring points 1: 3 monitoring points for a 1.119V: 0.681V monitoring points of a 5: a 0.728V monitoring points 7: A 0.973V monitoring points 2: a 0.775V monitoring point 4: a 0.585V monitoring point 6: A 0.661V monitoring points from the above data show can be seen, only the monitoring points and monitoring points 1, 7 to protect potential monitoring points 1 and 7 points for the pipeline to monitor potential, other points for the tank protection potential. After field testing, deep bed anode to earth resistance as 3Q more each cathodic protection system makes the device output in the output current is 20A, the voltage up to 80V. So that the device output current is low, causing the entire cathodic protection system,
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, the design of the measured soil resistivity 400Q �� m, the current (July 2005) measured soil resistivity measured for the 1750Q �� m . 5.4 lines some lines the middle part and the pump station in Block 2 potentiostat problems, not tested. Buttresses at the fixed lines laid by a sacrificial anode, line part of the protection potential for a 1.2 ~ 1.4V,
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, along the line can achieve good protection. Experience 6 River heavy crude oil through the storage and transportation system design and commissioning of cathodic protection the following conclusions. 6.1 Station area of protection required for cathodic protection current capacity, each auxiliary anode cathodic protection system grounding resistance should be less than 1Q; and often require long pipeline protection current, the auxiliary anode grounding resistance can be greater than 1Q. Therefore, when forced current cathodic protection design, can be protected under the Protection of the required amount of current size of the object to determine the auxiliary anode ground bed of the grounding resistance. 6.2 Cathodic Protection Station area near the steel anode bed protection near the protection potential, whereas the convergence point of protection current minimum. Therefore, the station area during the design of cathodic protection should be considered in a number of points on the implementation of the power point, scattered arrangement of anode ground bed, can protect the steel protection potential more evenly distributed. 6.3 The application of cathodic protection monitoring system for intelligent monitoring improved corrosion control and management; using a bus interface, advanced synchronization corrosion equipment and power to eliminate IR drop measurement of cathodic protection potential of technology to improve the control accuracy of cathodic protection potential . 6.4 potentiostat cathodic protection system is the core,
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