There is no uniform standard for the size of dredging grabs, and they need to be selected based on the operating scenario, capacity requirements, and the tonnage of the compatible crane. Typical parameters are as follows:
Capacity range: 1 cubic meter (soft mud) to 9 cubic meters (rock/wreck)
Applicable cranes: 6 tons to 200 tons
Typical dimensions (taking the EJ series clamshell grab as an example):
Small (1 cubic meter): 2380mm×3458mm×3533mm (self-weight 4 tons)
Large (9 cubic meters): 5465mm×7202mm×8666mm (self-weight 110 tons)
| Type | Applicable scenarios | Features of the dredging grabs |
|---|---|---|
| Heavy-duty Dredging Grab | Port and waterway dredging | Comply with national standard GB/T 39622-2020, simple structure and durable |
| (Clam Shell) | River and port mud/sand dredging | High efficiency, easy maintenance, capacity range 1-9 cubic meters |
| (Orange Peel) | Rock, iron plate sand, shipwreck salvage | Tooth-shaped edge, suitable for heavy cranes (30-200 tons) |
