He said that CNPC’s overall development objectives in the area of ​​coalbed methane are to increase exploration and development efforts in the southern Qinshui Basin and the two major coalbed methane industry bases in the eastern Ordos Basin, and to explore supporting technologies for CBM development in foreign basins.
At present, CNPC is improving the construction of coalbed methane networks. Hancheng and other pipelines are connecting with the natural gas pipeline network of the West-East Gas Pipeline; the four favorable areas of Weinan, Hancheng, Daningji County and Baode and the Tuha International Cooperation Zone. All are close to the existing trunk line.
Xu Fengyin predicts that PetroChina will increase the proven geological reserves of 200 billion cubic meters of coalbed methane in 2012 to provide resources for building capacity. In 2013, the production capacity was 4.5 billion cubic meters per year; in 2015, the output reached 4.5 billion cubic meters and the volume of goods was 4 billion cubic meters, making it the first domestic gas producer.
Xu Fengyin said that currently CNPC has registered more than 3 trillion cubic meters of coal bed methane resources, with proven geological reserves accounting for 63.8% of the country's total, and is mainly distributed in the two major coal seam basins of Yishui and Hubei. PetroChina’s investment in this area has increased substantially. CBM pre-evaluation, exploration concentrating areas, and development pilot tests have been carried out.
Xu Fengyin said that in the future, PetroChina will base its efforts in the two basins of Surabaya and Ordos and gradually form the development pattern of the four regions of southern and northern Fujian, Linyi and Luliang.
He estimated that the domestic natural gas demand in 2015 will be 220 billion cubic meters, with a supply capacity of about 160 billion cubic meters, and a coalbed methane production of 10 billion cubic meters; in 2020, the output of natural gas will be about 2020 billion cubic meters, of which unconventional natural gas production will be about 2020 billion cubic meters. Meters, of which unconventional natural gas production reached 62 billion cubic meters, accounting for 30% of total production. CBM reaches 20 billion cubic meters.
Standard of implementation: Chinese GB/T8163, GB/T8162, ASTM A106 GrB, ASTM A192
Application: used in conveying water, oil, gas and other fluids, and in structural building
Major grade grades: Grade10, 20 (negotiated, can also supply other special grade of steel tube. Accept the special requirements of the customer orders, such as the implementation of Q/320204AAAE02-2006 standard enterprise standard mechanical piping)
Chemical composition and mechanical properties of Seamless Steel Pipe:
Standard |
Steel grade |
Chemical constituents (%) |
||||||
C |
Mn |
Si |
Cr |
Ni |
Cu |
P.S |
||
GB/T8163 |
10 |
0.07~0.13 |
0.35~0.65 |
0.17~0.37 |
≤ 0.15 |
≤ 0.30 |
≤ 0.25 |
≤ 0.030 |
20 |
0.17~0.23 |
0.35~0.65 |
0.17~0.37 |
≤ 0.25 |
≤ 0.25 |
≤ 0.25 |
≤ 0.030 |
|
Q345 |
0.12~0.20 |
1.20~1.60 |
0.20~0.55 |
|
|
|
≤ 0.030 |
|
Mechanical properties |
Tensile strength (MPa) |
Yield strength (MPa) |
Elongation(%) |
|||||
10 |
335~475 |
≥ 205 |
≥ 24 |
|||||
20 |
410~550 |
≥ 245 |
≥ 20 |
|||||
Q345 |
490~665 |
≥ 325 |
≥ 21 |
Dimensional tolerance of Seamless Steel Pipe:
Type of steel tube |
Steel tube size mm |
Deviation |
||
Ordinary grade |
Senior |
|||
Hot rolling (extrusion, expansion) tube |
Outside diameterD |
All |
+1%(Minimum+0.50) |
- |
Wall thicknessS |
All |
+15%(Minimum+0.45) -12.5%(Minimum-0.40) |
- |
|
Cold drawing (rolling) tube |
Outside diameterD |
6~10 |
+0.20 |
+0.15 |
>10~30 |
+0.40 |
+0.20 |
||
>30~50 |
+0.45 |
+0.30 |
||
>50 |
+1% |
+0.8% |
||
Wall thicknessS |
≤1 |
+0.15 |
+0.12 |
|
>1~3 |
+15% -10% |
+12.5% -10% |
||
>3 |
+12.5% -10% |
+10% |
||
Note: the outer diameter is not less than 351mm of the thermal expansion tube, the wall thickness allows the deviation of +18% |
Seamless Steel Pipe
Hot Rolled Seamless Steel Pipe,Hot-Expanded Seamless Steel Tube,Cold-Drawn Seamless Steel Tube,Carbon Steel Seamless Pipe
Cangzhou Fixed Star Steel Co.,Ltd , http://www.fixedstarpipe.com