High-energy drop-weight testers

Zwick DWT high-energy drop-weight testers are used for testing and evaluating fracture surfaces of ferritic steels to test methods described in API-RP 5L3, EN 10274 and ASTM-E 436.

• DWTs are available in 20, 30, 40, 60, 80 and 100 KJ sizes.
• The standard maximum drop-height for all sizes is 5m. DWT 20 - 40 are alternatively available with a maximum drop-height of 2.5 m.
• Test fixtures are fitted outside the test area. High specimen throughput is ensured by pneumatic specimen feed within 10 seconds.
• The test area is electrically and mechanically protected via a safety circuit. The test is not performed until all safety contacts have been monitored.
• In the test, weights fall on to a specimen supported at both ends and break it. The specimen is provided with a cold-pressed notch, this being the point at which it breaks under the impact effect.