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There are three common types of the anti-corrosion steel pipes structure in the picture Performance indexes of single-layer anti-corrosion pipeNoItemPerformance Index1Adhesion 22Cathodic Disbonding(65℃，48h). mm 83Cathodic Disbonding(65℃，30d) /mm 154Bending resistance(-20℃, 2.5)No cracksThe coating
There are three common types of the anti-corrosion steel pipes structure in the picture
Performance indexes of single-layer anti-corrosion pipe
|
No |
Item |
Performance Index |
|
1 |
Adhesion |
≤ 2 |
|
2 |
Cathodic Disbonding(65℃，48h). mm |
≤ 8 |
|
3 |
Cathodic Disbonding(65℃，30d) /mm |
≤ 15 |
|
4 |
Bending resistance(-20℃, 2.5°) |
No cracks |
|
The coating thickness of the laboratory sprayed specimen should be 300μm~400μm. |
||
Performance indexes of double-layer anti-corrosion pipe
|
No |
Item |
Performance Index |
Testing Method |
|
1 |
Softening point. ℃ |
90 |
GB/T 4507 |
|
2 |
Evaporation loss(160℃). % |
≤ 1.0 |
GB/T 11967 |
|
3 |
Shearing strength(PE/steel). MPa |
≥ 1.0 |
GB 7124 |
|
4 |
Peel strength(PE/steel). N/cm |
≥ 35 |
GB 2792 |
|
(20±5℃) |
|||
Performance indexes of triple-layer anti-corrosion pipe
|
No |
Item |
Performance Index |
Testing Method |
|
1 |
Density, g/cm |
0.92-0.95 |
GB 4472 |
|
2 |
Flowing rate, g/10min(190℃=2.16kg) |
≥0.7 |
GB 3682 |
|
3 |
Vicat softening point, ℃ |
≥90 |
GB 1633 |
|
4 |
Embrittlement temperature, ℃ |
≤ -50 |
GB 5470 |
