Storm Drain Grate

Storm Drain Grate Manufacturer & Wholesale Supplier

Shanxi Yuanhang Machinery Construction Industry and Trade Co., Ltd. manufactures and supplies industrial-grade storm drain grates and catch basin covers engineered for municipal drainage, road construction, industrial yards, and heavy-load infrastructure. Our production capabilities cover resin sand casting, automated molding, high-frequency resistance welding, and anti-corrosion coating, serving global civil contractors, drainage distributors, and municipal project procurement teams.

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Product Range

Ductile Iron Drainage Grates

Heavy-duty ductile iron grates and frames manufactured to EN 124 (Classes C250, D400, E600) and AASHTO standards, built for vehicular roadways, ports, and industrial zones.

Anti-Slip Steel Bar Gratings

Pressure-welded carbon steel bar gratings featuring serrated load-bearing bars for enhanced slip resistance in wet and high-traffic pedestrian or vehicular paths.

Trench & Catch Basin Covers

Modular trench covers and drop-in basin grates designed for surface water interception along highways, building perimeters, and parking facilities.

Hinged & Lockable Drainage Units

Security-engineered drain grates equipped with integrated hinge mechanisms and bolted locking systems to prevent theft and unauthorized access.

Materials & Technical Specifications

Category	Parameter	Specifications
Ductile Iron Storm Drain Grates	Standard / Grade	EN 124, BS 5834, ASTM A536 (Grade 65-45-12 / GGG50)
	Material Options	Ductile Cast Iron (Spheroidal Graphite Iron)
	Size / Dimension Range	Clear Opening 300 mm x 300 mm to 1000 mm x 1000 mm / Load Class: C250, D400, E600
	Surface Finish Options	Black Bitumen Paint, Anti-Rust Primer, Epoxy Coating
Steel Bar Gratings	Standard / Grade	ANSI/NAAMM MBG 531, BS EN ISO 14122, YB/T 4001.1
	Material Options	Carbon Steel (Q235B / ASTM A36)
	Size / Dimension Range	Bearing Bar Depth 25 mm–65 mm / Thickness 3 mm–6 mm / Mesh Pitch Custom
	Surface Finish Options	Hot-Dip Galvanized (>= 65 um), Mill Finish, Painted
Catch Basin Frames & Grates	Standard / Grade	EN 124-2, AASHTO M306
	Material Options	Gray Iron (GG20/HT200) or Ductile Iron (GGG50)
	Size / Dimension Range	Frame Depth 75 mm–150 mm / Custom Rebate Profiles
	Surface Finish Options	Asphaltic Bituminous Coating, Coal Tar Epoxy
Heavy-Duty Trench Gratings	Standard / Grade	EN 1433, AS 3996 (Classes B to G)
	Material Options	Ductile Iron or Welded Heavy Steel
	Size / Dimension Range	Standard Widths 200 mm–600 mm / Length 1000 mm
	Surface Finish Options	Hot-Dip Galvanized, Anti-Slip Bituminous Paint

Manufacturing Standards & Quality Control

Every production batch undergoes structured quality verification gates to inspect dimensions, structural load capacity, and material composition prior to dispatch:

Standard Compliance: Manufacturing follows EN 124, EN 1433, ASTM, AASHTO, and ISO specifications.

Material Traceability: Spectrometric analysis verifies carbon, silicon, and nodular graphite rates in molten iron prior to pouring. Mill Test Certificates (MTC) conforming to EN 10204 3.1 are provided with shipments.

Load-Bearing Proof Testing: Hydraulic compression testing machines apply proof loads according to EN 124 standards to verify deflection limits and prevent structural failure under heavy traffic.

Dimensional & Fit Inspection: Routine checks on frame-to-grate seating clearance, flatness, and locking mechanism tolerances to prevent rattling and displacement under vehicle vibration.

Serrated Surface Galvanized Ductile Iron Grating For Container Terminals

Customization & Supply Options

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Custom Fabrication: Tailored load capacities, customized logo castings, specific drainage hole patterns, and non-standard clear opening dimensions.

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OEM Branding & Marking: Cast-in project names, load class indicators, standard compliance legends, and weather-resistant pallet packaging.

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Minimum Order Quantity (MOQ): Production runs starting from 50 sets for standard municipal items; trial orders supported for custom design configurations.

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Lead Time & Logistics: Standard inventory items ship within 7 to 10 days. Custom casting or hot-dip galvanized batches typically require 20 to 30 days. Shipped via FOB Tianjin/Qingdao, CIF, or DDP to destination ports.

Our Factory

FAQ

Q: What EN 124 load classes do your ductile iron storm drain grates support?

A: We manufacture and test drainage grates spanning Class C250 (parking lots and curbs), Class D400 (heavy traffic roadways and commercial streets), and Class E600 (dockyards and industrial loading areas).

Q: Can you provide proof-load test reports for our municipal project submittal?

A: Yes. Each production batch can be subjected to certified proof-load compression testing, and full test reports are included alongside EN 10204 3.1 material certificates upon request.

Q: What is the average hot-dip galvanized coating thickness for your steel bar gratings?

A: Our standard hot-dip galvanizing process complies with ASTM A153 and ISO 1461, ensuring a minimum average coating thickness of 65 microns for long-term outdoor weather and corrosion resistance.

Q: How do you prevent the drain grates from rattling and shifting under heavy traffic?

A: Frames and grates are machined to precise seating tolerances. We also offer impact-absorbing elastomer or rubber gaskets fitted into the frame rebate to eliminate traffic noise and displacement.

Q: Are your drainage grates equipped with anti-theft locking systems?

A: Yes. Many of our heavy-duty ductile iron grates incorporate bolt-down locking mechanisms or hinged designs secured with specialized security fasteners to prevent unauthorized removal.

Q: What is the lead time for custom-cast drain grates featuring our municipal logo or specific dimensions?

A: Pattern making and sample verification require 10 to 14 working days, followed by 20 to 25 days for mass production and batch load testing.

Request a Quote

Need storm drain grates, ductile iron catch basin covers, or custom trench gratings for your civil infrastructure project? Send us your load class requirements, clear opening dimensions, quantities, and engineering drawings.
Direct Email: anzhiyuan@yhmadeinprc.com.cn
Required Inquiry Details: Item description, load class (e.g., D400), size/dimension, material grade, coating specifications, and target order quantity.
Response Time: Technical specification verification and commercial quotations provided within 12 hours.

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