Study on Commissioning Techniques for Oil Transportation Pipeline
185
Fig. 3. Elevation chart of China-Myanmar crude oil pipeline (NuJiang Section)
4 Commissioning of Large Drop Pipeline (Nu Jiang)
At 14:00 on May 26, the oil head arrived at MS station and began to cross the Nujiang
river. At 22:28 on May 27, after the oil head crossed the high point of F2, the outbound
pressure of MS was too high, and there was a risk of overpressure, so the pipeline were
shut down urgently. Between May 28 to June 1, several attempts were made to start up,
but none was successful. Table 1 shows some pressure data from MS to F2 high point.
Table 1. Some pressure data from MS to F2 high point
L (km) H (m) P1 (MPa) P2 (MPa) P3 (MPa)
MS 106.8 883
14.26
13.58
14.68
6# 115.7 873
14.04
13.41
14.47
LL 153.3 1854
4.05
3.28
4.51
8# 161.1 1800
4.11
3.37
4.61
F2 174.4 2183
0.09
0.00
1.60
Note: 1. P1 is the measured data on May 31; 2. P2 and
P3 are measured data on June 1
5 Abnormal Pressure Analysis
According to the principle of energy conservation [1], the pressure at the two measuring
points should satisfy the following relationship,
P 1 + ρgZ 1 = P 2 + ρgZ 2 + P f + P a
(1)