Introduction
A two-piece extended boom is the most common type of extended attachment for excavators. It consists of an extended main boom and an extended stick, which replace the excavator's original standard boom to increase the operating radius and digging depth.
Fabricated from high-strength steel and equipped with the necessary pins and hydraulic lines, these booms can be customized based on the excavator's tonnage. While they offer a significantly larger operating range compared to standard booms, their digging force is reduced, making them unsuitable for heavy-duty applications like rock breaking.
Standard Configuration
1 set boom and arm, 1 digging bucket,1 bucket cylinder,1 linkage assembly,6 pins, 4 high‑pressure hoses, 3 grease tubes, 6 steel pipes.
Working condition
Primarily used for river dredging, deep foundation excavation, slope trimming, and long-distance earthmoving operations
Advantages
1. Main material Q355B from Shaogang Steel; optional Q690D high‑strength steel for severe heavy‑duty conditions.
2.Full‑groove welding, strict NDT non‑destructive test for all welding seams.
3.Adopt seamless cold‑drawn steel pipes and standard union joints to minimize oil‑leak risk.
4.Optimized plate thickness and reinforcing plates on high‑stress zones to avoid weld cracking
ZHONGHE triple quality control system
1.The first system is the technical design drawing review mechanism.
2.The second system is the semi-finished product review mechanism.
(each process has a detection testing for the previous process)
3.The third system is the finished product testing.
(Before painting, the overall inspection is carried out to check whether the design size matches the welding size, and whether the installation size meets the design requirement.)
To sum up, every single ZHONGHE product has been passed the above three-stage inspection system to ensure that is qualified before shipping.
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