Ductile Iron Manhole Cover, Stainless Steel Manhole Cover, Ductile Iron Drain Grate Manufacturer & Supplier

Professional Cast Iron Drainage Solutions

Professional manhole cover products with reliable load-bearing capacity

WHO WE ARE

We have been engaged in the cast iron drainage industry for many years. Committed to manufacturing high-quality piping and drainage products, we have established a solid reputation among international buyers. All products are manufactured in compliance with global industry standards to guarantee outstanding durability and safety. We always prioritize clients' needs and strive to deliver maximum value to every partner.

Customers

Years Experience

Types of Products

CORE PRODUCT CATEGORIES

We produce a full range of ductile iron manhole covers, drainage gratings, trench covers and other related products with exquisite craftsmanship and reliable quality.

Anti-settling Manhole Cover

Ductile Iron Round Manhole Cover Φ700 D400

Ductile Iron Square Manhole Cove

Ductile Iron Drain Grate with Frame 450 750 E600

Ductile Iron Channel Grating300 500 30

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WHY PARTNER WITH JINZHIJIANG

Integrity Is The Foundation

Adhere to honest business operation and abide by the bottom line of commercial ethics.

Quality First

We regard quality as our life, and establish a full process control system.

Customer First

Demand is the first priority, providing personalized solutions.

Win-win Cooperation

Cherish the cooperative relationship and pursue long-term mutually beneficial development.

SOLUTIONS

Our products are widely used in various sectors such as water supply, power supply, gas supply, telecommunications, expressway construction and other infrastructure fields.

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Drainage Trenches of BMW Brilliance Automotive Factory
For Use in Production Workshops of Newly Built Factories
Pavement for parks delivers superior aesthetic effects
Rainwater and Sewage Inspection Wells for Urban Roads, and Other Related Facilities

TECHNOLOGY & INNOVATION

Quality raw materials: carefully selected domestic high-quality cast iron, scientifically proportioned, ensuring the density and composition stability of castings from the source.

Melting iron water: equipped with an intelligent temperature control melting system, the purity of iron water reaches the industry's first-class standard, and each batch is retained for inspection and traceability.

Mold molding: Using high-precision mold combined with pneumatic micro-shock compaction technology, the sand is compacted evenly and the corners are clear, providing precise molding guarantee for pouring iron water.

How to Select a Reliable Casting Manhole Cover Manufacturer Internationally

2026-08-15

Yantai Jinjiang Building Materials Co., Ltd. – your reliable partner for compliant, high‑performance casting solutions.

2026-08-15

Design Principles of Anti-Settlement Manhole Covers and Road Scenarios That Deserve Attention

2026-10-13

In urban road networks, sinking, cracking, or uneven pavement around manhole covers not only affects vehicle traffic but also increases long-term maintenance costs. Anti-settlement manhole covers are designed to help reduce the risk of uneven settlement around the manhole. So how are they designed,

2026-10-13

Why Horizontal Static Pressure Molding Produces Better Ductile Iron Manhole Covers？

2026-09-21

Ductile iron manhole covers may look similar on the surface, yet their prices and performance can vary widely. The key difference is not only the raw material. It is also the manufacturing process.

2026-09-21

VOICES OF TRUST

"We bought ductile iron manhole covers for municipal projects. Precise workmanship, complete CE certificates, and delivery schedules are fully guaranteed."

Marcelo Rossi
"As a real estate developer, we love their trench gratings. Stable quality, thoughtful after-sales service, and the team fully understands our infrastructure demands."

Sarah Chen
"This supplier holds ISO9001 and AAA credit certifications. Their full product range saves our sourcing cost, and every cooperation is smooth and reassuring."

Dr. Hans Weber

READY TO UPGRADE YOUR PRODUCTION?

If you have any questions or needs regarding our products or services, please feel free to contact us. We look forward to cooperating with you and providing you with the best solutions.

PHONE

+86-13405356277

EMAIL

info@jinjiangbuilding.com

ADDRESS

Room 1, No. 83 Kunlun Mountain Road, Fulaishan Subdistrict, Yantai Area, China (Shandong) Pilot Free Trade Zone