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Oil storage tanks plate
• Cooperating with Northeast College, we transferred oxide metallurgy technology into production successfully. We develop the exquisite skills of controlling tissue in heat-affected zone of welding plates under large heat input. It enhances the HAZ toughness of welding plates. This supports construction of oil storage tanks of 200,000 cubic meters. Following are relevant certificates issued by China National authorities.
Welding test of 12MnNiVR
Welding simulation on local testing machine model MMS-200
Index & performance of welding simulation
|
Heat Input J/cm |
Max. Temp. C |
t8/5 (S) |
Impact Energy (-15 C)J |
Average J |
|
100 |
1300 |
138 |
173 |
121 |
201 |
165 |
|
125 |
1300 |
215 |
217 |
218 |
190 |
208 |
|
400 |
400 |
326 |
205 |
231 |
145 |
193 |
|
|
|
|
174 |
152 |
183 |
170 |
Results approve that the plate is qualified in large heat input welding.
Welding performance for Delivered Plate
Welding parameter
|
Sample No. |
Welding
passes |
Wire diameter mm |
Current A |
Voltage V |
Speed
cm/min |
Heat input KJ/cm |
|
12MnNiVR -12 |
1 |
Φ1.6 |
380~390 |
43~44 |
580/680 |
200 |
|
12MnNiVR -13 |
1 |
Φ1.6 |
420~430 |
43~44 |
490/494 |
180 |
|
12MnNiVR -14 |
1 |
Φ1.6 |
420~430 |
43~44 |
500/505 |
180 |
Impact results of different joints location
|
Sample No. |
Sample location |
Temperature |
Impact energy /J |
|
12MnNiVR-12 |
12-1 |
Weld center |
-40°C |
118+120+125=121 |
|
12-2 |
Fusion line |
100+90+101=97 |
|
12-3 |
Heat-affected zone 2mm |
156+173+175=168 |
|
12MnNiVR-13 |
13-1 |
Weld center |
-20°C |
79+87+95=87 |
|
13-2 |
Fusion line |
76+123+90=96 |
|
13-3 |
Heat-affected zone 2mm |
150+142+140=144 |
|
12MnNiVR-14 |
14-1 |
Weld center |
88+90+93=90 |
|
14-2 |
Fusion line |
106+97+95=99 |
|
14-3 |
Heat-affected zone 2mm |
208+217+229=218 |
|
Regulatory requirements |
-20°C |
more than and equel to 47 |
Typical Project Reference of 12MnNiVR plates
2× 100,000cubic meters tanks in Lanzhou national oil storage base
Quantity :1462MT
Thickness:12~32mm
Time : May/June,2010
2× 100,000cubic meters tanks in Zhoushan national oil storage base
Quantity :1398MT
Thickness:12~32mm
Time :Nov./Dec.,2010 6× 100,000cubic meters tanks in Zhoushan national oil storage base
Quantity :4194MT
Thickness:12~32mm
Time :Jun./Jul.,2011
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