En124 D400 Anti-Theft Square Ductile Iron Manhole Cover

• Customization: Available
• After-sales Service: Compensation for Quality Problems, 24h Service
• Warranty: 2 Years
• Material: Iron
• Shape: Square
• Certification: ISO
• Transport Package: Wooden Pallets/Steel Pallets/as Your Request
• Specification: EN124 E600/D400 / C250 / B125/A15
• Trademark: CNBM
• Origin: China
• HS Code: 732510900
• Production Capacity: 5000/Month

Product Description

Product Description

Basic Information

Our Square Ductile Iron Manhole Cover is engineered for utility access, telecommunication, power cable trenches, and industrial flooring where square or rectangular configurations are preferred for easy alignment and modular installation. With EN124 D400 standard, it supports up to 40 tons of load, making it ideal for areas requiring frequent access and uniform load distribution.

Model NO.	SQ-D400-1 / SQ-C250-1 / SQ-B125-1 / SQ-A15-1
Shape	Square / Rectangular
Load Rating	A15, B125, C250, D400, E600, F900
Standard	EN124
Material	High-quality Ductile Iron (QT500-7 / QT600-3)
Surface Treatment	Anti-rust bitumen coating / Epoxy powder coating (RAL colors available)
Features	Anti-theft hinge system, uniform load distribution, corrosion resistant, quiet operation
Application	Telecommunication vaults, power cable trenches, water meter pits, gas valve boxes, industrial plant floors, municipal utility access
Customization	Logo engraving, size, color, coating, hinge type
Warranty	2 years

Key Advantages

√  Anti-Theft Hinge System

Heavy-duty concealed hinge on one side allows the cover to swing open smoothly while remaining securely attached to the frame—ideal for applications requiring frequent access.

√ Corrosion & Rust Resistance

Advanced anti-rust coating + ductile iron material ensures long service life even in harsh underground environments.

√ Quiet & Anti-Slip

Rubber gasket reduces noise during vehicle passage; anti-slip pattern enhances pedestrian and vehicle safety.

√Customizable for Multi-Section Applications

Available in single, dual, or multi-section configurations to accommodate large access points or trench systems. Logo, color, size, and coating available.

Specification

                                                                                          More sizes available upon request.

Certifications

Company Profile

CNBM International Corporation (CNBM INTERNATIONAL CORP.) is a trusted global supplier of high-quality iron castings and comprehensive building materials. As a key subsidiary of China National Building Materials Group (CNBM Group) —one of the world's largest building materials enterprises and a Fortune Global 500 company for eleven consecutive years—we combine vast industrial resources with professional export capabilities to serve customers worldwide 

Our Core Business
We specialize in the manufacturing and international trade of:

Ductile iron manhole covers, gully grates, surface boxes, and pipe fittings

Steel, aluminum, and construction machinery & equipment

Fiberglass products, solar modules, and green energy solutions

Refractory materials, insulation materials, and hardware products 

......

Our Markets
Our products have been successfully exported to markets including:

Middle East & Africa: Panama, Israel, Algeria, Iraq, Jordan, Tunisia, Serbia, Palestine, South Africa, Libya

Asia Pacific: Philippines, Vietnam, India, Indonesia, Russia

Europe & Americas: Select clients across Europe and North America

Domestic: Extensive presence in the China market

                     Vision

                        Mission

                         Culture

Create a new global trade model and deliver exceptional value to all stakeholders 

Lead the transformation of the foreign trade industry and become a globally influential comprehensive building materials service provider 

We embrace a culture of "Broad-mindedness, Tolerant Environment, and Forgiving Disposition"—creating a workplace where innovation thrives and customer focus guides everything we do 

Strength	Details
Global Reach	Established business relations with clients in 140+ countries and regions worldwide, with 6,934 export shipments (2021–2024) valued at over USD 300 million
Own Manufacturing	Factory located in Handan City, Hebei Province, covering 13,000 m² with an annual production capacity of 10,000 tons for iron castings
Quality Certifications	ISO9001:2015 certified; AEO Advanced Certified Enterprise (Beijing Customs); Tax Credit A-Level Enterprise (2013); D-U-N-S Rating 4AA2
Financial Strength	AA- bank rating with credit line exceeding RMB 7 billion; long-term strategic partner of China Export & Credit Insurance Corporation (Sinosure)
Supply Chain Integration	Strategic partnerships with 100+ domestic manufacturers, enabling reliable sourcing and competitive pricing
One-Stop Service	Integrated solutions covering procurement, sales, logistics, financing, and risk control—your single point of contact for complex supply chains
Overseas Presence	Wholly-owned subsidiaries and branch offices in five countries, implementing localized operations to ensure agile supply chain and rapid response
Global Recognition	Recognized as one of China’s first National-Level Pilot Enterprises for Comprehensive Foreign Trade Services (2016); awarded “E-Commerce Demonstration Unit” by the Ministry of Commerce for four consecutive years

FAQ

Q1: What is your MOQ?
A: Our MOQ is 100 pieces per size, but we accept mixed sizes for trial orders.

Q2: Can I get a sample?
A: Yes, samples are available. Sample cost is refundable upon bulk order.

Q3: What is the delivery lead time and minimum order quantity?

A: Regular specifications (e.g. Φ650mm, Class D400) are in stock and can be shipped within 7–10 days after order placement. Custom specifications (special sizes, load classes, surface markings) require mold opening, with a lead time of 15–25 days.The minimum order quantity depends on the specification: 100 sets for regular products and 200 sets for custom products, and is negotiable.

Q4: Do you provide OEM service?
A: Yes, we offer full OEM and ODM support to meet your branding and project requirements. Our capabilities include:

√ Customization Option
√ Coating & Color
√ Size & Shape
√ Load Rating
√ Hinge & Locking
Q5: How do you ensure quality?
A: Quality is our top priority. We operate a multi-layer quality control system covering raw materials, production process, and final inspection:

1. Raw Material Control

Use of high-grade ductile iron (QT500-7 / QT600-3) sourced from certified mills

Incoming material testing for chemical composition via spectrometer analysis.

2. In-Process Control

Real-time monitoring of melting temperature, pouring process, and molding

Dimensional checks during production to ensure fit between cover and frame.

3. 100% Final Inspection Before Shipment
Every product undergoes:

Inspection Item
Method
Load Capacity
Hydraulic press testing per EN124 standard (e.g., D400 = 400 kN)
Coating Quality
Thickness measurement, adhesion test, and visual inspection
Fit & Clearance
Gauge checks on cover-to-frame fit, hinge operation, and locking mechanism
Dimensional Accuracy
Caliper and template verification for outer size, clear opening, and depth
4. Third-Party Inspection
We welcome SGS, BV, TÜV, or client-nominated third-party inspections prior to shipment. All inspection records and test reports are retained for traceability.

5. Certifications

ISO9001:2015 certified for quality management

EN124 compliant (test reports available upon request)

Factory audited by major clients from Europe, Middle East, and Southeast Asia