DWTT Series Drop Weight Tear Impact Testing Machine
| Model | DWTT-20000/30000 | DWTT-40000 | DWTT-50000 | ||
| Max impact energy(J) | 20000/30000 | 40000 | 50000 | ||
| Min impact energy(J) | 8000 | 10000 | 15000 | ||
| Main hammer body quality(Kg) | 630 | 630 | 800 | 1180 | |
| main hammer body quality error | ±1% | ||||
| Weight quality(Kg) | / | 30kg | 30kg | 30kg | |
| Weight number | / | 13 | 22 | 26 | |
| Weight quality error | |||||
| Total hammer body quality (Kg) | 630 | 1020 | 1460 | 1960 | |
| Impact height (mm) | 1275～2800 | 1275～2600 | 1275～2600 | ||
| Impact speed (m/s) | 5～7.67 | 5～7.14 | 5～7.41 | ||
| Height measure resolution (mm) | 0.1 | ||||
| Height measure error | ≤±5 | ||||
| Hammer blade hardness | HRC58～62 | ||||
| Hammer blade radius of curvature (mm) | R25±0.1 | ||||
| Bearing hardness | HRC58～62 | ||||
| Support radius of curvature(mm) | R15±0.1、R20±0.1 | ||||
| Hammer blade center and bearing center deviation(mm) | ≤±1.5 | ||||
| span of sampel supports(mm) | 254±1.5 | ||||
| Sample specifications(mm) | （305±5）×（76.2±1.5）×（3～40） | ||||
1. Instroduction
The testing machine is mainly used for drop weight tear test of pipeline and in thick steel ferritic steel, namely DWTT test. The test machine intergrating mechanical, electrical, automatic control technology to one, and to achieve fully automated process of feeding, lifting hammer, impact, fracture specimen collection, grab the hammer. In addition, this test machine has multi-channel protection measures, greatly improve the safety of operating personnel and equipment use. It is commonly used test equipment by the pipeline manufacturer, large steel mills, Iron and Steel Institute and other enterprises and research institutes.
2. Test standard
GB/T 8363-2007 “ferritic steel drop weight tear test method”
ASTM E436-03 “Standard Test Method for Drop-Weight Tear Tests of Ferritic Steels”
API RP*5L3-96 “Conducting Drop-Weight Tear Tests on Line Pipe”
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