Hotline
+86 13184988688
Hotline
+86 13184988688
[20,000] MT
Annual Capacity
A15 – F900
Load Classes
[800]+
Patterns on File
[30]+
Export Markets
Product
Single Gully Grating
Single gratings and multi-unit sets for kerb inlets, carriageways and yards — cast in ductile iron so the bars resist impact instead of snapping.
Ductile Iron Single Gully Grating
Single gratings and multi-unit sets for kerb inlets, carriageways and yards — cast in ductile iron so the bars resist impact instead of snapping.
Customized cast iron grate
Single gratings and multi-unit sets for kerb inlets, carriageways and yards — cast in ductile iron so the bars resist impact instead of snapping.
Cast iron single grate workshop
Single gratings and multi-unit sets for kerb inlets, carriageways and yards — cast in ductile iron so the bars resist impact instead of snapping.
Ductile iron Double & Triple Sets
Single gratings and multi-unit sets for kerb inlets, carriageways and yards — cast in ductile iron so the bars resist impact instead of snapping.
Spectro analysis on every heat
Chemistry recorded against the batch number cast into the cover.
Nodularity check
Metallographic sample kept for each production run.
Load test to the specified class
D400 means 400 kN, not "40 tonnes".
Independent test report
issued by the Cangzhou Municipal Product Quality Supervision & Inspection Institute.
ABOUT US
Introduction
Founded in 2023 in the heart of Hebei Province's renowned casting belt, Hebei Qianshen Metal Products Co., Ltd. has grown into a trusted supplier of municipal ironwork. Drawing on the region's rich foundry heritage and our own commitment to precision ...
NEWS
Learn more
Which load classes can you supply?
A15 (15 kN), B125 (125 kN), C250 (250 kN), D400 (400 kN), E600 (600 kN) and F900 (900 kN). If you are unsure, tell us where it will be installed and we will advise.
2026-10-27
What coating do you offer?
Black bitumen as standard. Epoxy, powder coating or hot-dip galvanising on request; RAL colours available.
27
2026-10
What sizes are available?
Round clear openings DN300–DN900; square 300×300 to 1,000×1,000 mm; gratings in lengths up to [1,000] mm. Custom sizes to drawing.
27
2026-10
How can I be sure the cover is really ductile iron?
Every heat is spectro-analysed before pouring and recorded against the batch number cast into the cover. The spectrometer printout and the independent load test report from the Cangzhou Institute of Product Quality Supervision and Inspection can be supplied with your shipment. On request we cast tensile test bars from the same heat.
27
2026-10
Why ductile iron rather than grey iron, steel or composite?
Ductile iron has nodular graphite, so it bends and absorbs impact instead of cracking. Against grey iron it gives roughly twice the tensile strength and far higher impact resistance — which is what lets a [40] mm cover take a 400 kN test load. Against steel it does not dent and does not rust through from the inside. Against composite covers it keeps its shape under sustained wheel loads and does not creep on hot asphalt.
27
2026-10
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