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Ductile Cast Iron Pipe
Runhai supplies ductile cast iron pipes in diameters ranging from DN80 to DN2000, with internal cement mortar lining and external coatings of epoxy paint or zinc, conforming to K9, C25, C30, and C40 pressure class standards. These pipes are manufactured using spheroidal graphite iron, which provides superior tensile strength and elongation compared to conventional grey iron, making them suitable for high-pressure water and sewage systems. The exact dimensions and wall thicknesses follow ISO 2531 and EN 545 standards, with pressure ratings verified by hydrostatic testing.
The material composition adheres to standard spheroidal graphite iron with magnesium treatment to achieve a nodular graphite microstructure. Typical elongation ranges from 10% to 15%, and tensile strength exceeds 420 MPa, consistent with industry benchmarks for ductile iron. Coating options include zinc at 130 g/m² minimum for corrosion resistance, epoxy paint for chemical environments, and cement lining to prevent internal scaling. These are not generic pipes but engineered for long-term underground use in municipal infrastructure.
These pipes are primarily purchased by government water authorities, utility contractors, and infrastructure developers in Southeast Asia, Africa, and the Middle East. Buyers typically order in bulk for pipeline networks, with standard packaging on wooden pallets or in bulk shipload quantities. Trade terms commonly include FOB Qingdao or CIF destination ports, with lead times averaging 30 to 45 days after deposit. MOQ is negotiable based on diameter and coating type.
| Material | Ductile cast iron (spheroidal graphite iron) |
| Diameter range | DN80 to DN2000 |
| Pressure class | K9, C25, C30, C40 |
| Internal lining | Cement mortar (standard per ISO 2531) |
| External coating | Zinc (min 130 g/m²), epoxy paint, or optional bitumen |
| Tensile strength | Minimum 420 MPa (typical for grade K9) |
| Elongation | Minimum 10% (typical for ductile iron under ISO 2531) |
| Wall thickness | Varies by diameter and pressure class; standard per ISO 2531 tables |
| Joint type | Push-on rubber ring joints (standard for water applications) |
| Testing | Hydrostatic pressure test at 1.5x working pressure (typical industry requirement) |
Runhai is a manufacturer based in Jinan City, Shandong Province, China, with production facilities focused on ductile iron pipe casting and coating. The supplier has a harbor trust tier, indicating verified export activity and logistics capability, though no public data confirms factory size, workforce, or years in operation. Response rate and average response time are not available, suggesting limited digital engagement but not necessarily operational capacity.
The listing confirms active export of ductile iron pipes but does not state certifications such as ISO 9001, WRAS, or NSF. No client names, project references, or third-party audit reports are provided. Buyers should treat this as a direct manufacturer with proven production capability but unverified quality management systems unless independently confirmed.
Ductile cast iron pipes are widely used in water transmission, sewage systems, and industrial fluid conveyance. Available in diameters from DN80 to DN2000 with cement lining, epoxy painting, or zinc coating options, they meet K9, C25, and C30 grade standards for pressure and load-bearing performance. These pipes are a staple in infrastructure projects globally and are actively traded for import/export due to their durability, corrosion resistance, and cost-effectiveness in municipal and industrial applications.
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Sourcing Ductile Cast Iron Pipe from Runhai - China Import Guide
Before placing an order, verify the exact pressure class (K9, C25, etc.) and coating type against your project specifications. Request material test certificates for tensile strength, elongation, and graphite nodularity. Confirm the cement lining thickness matches your hydraulic design requirements, as under-lining can lead to premature corrosion and over-lining reduces flow capacity. Do not assume compliance with international standards unless explicitly documented by the supplier.
Confirm the Incoterms offered - FOB Qingdao is common, but CIF terms require clarification of insurance coverage. Lead time typically ranges from 30 to 45 days after deposit, depending on diameter and coating complexity. Payment terms are usually 30% advance with balance against shipping documents. Ask for a production schedule and inspection window before shipment, especially for large orders exceeding 500 tons.
Conduct pre-shipment inspection for coating adhesion, joint alignment, and internal lining integrity. Use a hammer test to detect delamination in cement lining and a thickness gauge for zinc or epoxy. Request a copy of the hydrostatic test log and batch traceability numbers. Ensure the supplier provides a packing list with pipe IDs, diameters, and coating types, and that all documentation aligns with your import customs requirements.
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30 suppliersBuy Ductile Cast Iron Pipe in Bulk — Supplier in China
When sourcing Ductile Cast Iron Pipe for your business, securing the right balance of quality and cost is essential. Runhai, a supplier based in China, offers this product with key specifications including K9, C25, C30 (ISO 2531 / EN 545 pressure classes), Ductile Iron with spheroidal graphite, high tensile strength, and DN80, DN100, DN150, DN200, DN250, DN300, DN350, DN400, DN500, DN600, DN700, DN800, DN900, DN1000, DN1200, DN1600, DN1800, DN2000. By purchasing directly from the manufacturer or authorized exporter, buyers can negotiate favorable FOB prices starting at $400485/Bags and manage bulk orders with a minimum order quantity (MOQ) of 1 Bags. This product is actively traded under HS Code 7303.00, making it a staple in the Iron Pipes sector with strong demand from importing countries worldwide.
Ductile Cast Iron Pipe Specifications, Trade Terms & Pricing
Importing Ductile Cast Iron Pipe requires careful attention to shipping logistics, customs compliance, and secure payment terms. Runhai offers flexible shipping options such as Full Container Load (FCL) or Less than Container Load (LCL) via sea freight. To ensure a smooth transaction, buyers should verify import duties for HS Code 7303.00 in their destination country. Common payment methods for international B2B transactions include Letter of Credit (L/C), Telegraphic Transfer (T/T), and Documents against Payment (D/P). All transactions and RFQs are facilitated through EximNext, a leading global B2B marketplace designed to make cross-border trade secure and efficient.
About Runhai — Supplier in China
Finding trustworthy partners is the foundation of successful importing. Ask the supplier of this Ductile Cast Iron Pipe for business registration and quality documents before ordering. Whether you are a distributor, wholesaler, or procurement manager, you can request a free quotation, ask for product samples, and finalize your bulk purchase with confidence. EximNext hosts thousands of manufacturers and exporters across 200+ countries. Explore similar products in the Iron Pipes category and connect with top-tier exporters on our comprehensive import export marketplace. Start your sourcing journey today.
Import Ductile Cast Iron Pipe — Shipping, Logistics & Customs
Importing Ductile Cast Iron Pipe requires careful attention to shipping logistics, customs compliance, and secure payment terms. Common shipping options include Full Container Load (FCL) or Less than Container Load (LCL) via sea freight. Buyers should verify import duties for HS Code 7303.00 in their destination country. Common payment methods include Letter of Credit (L/C), Telegraphic Transfer (T/T), and Documents against Payment (D/P).
Frequently Asked Questions About Ductile Cast Iron Pipe
What is the wholesale price of Ductile Cast Iron Pipe?
The current listed wholesale price for Ductile Cast Iron Pipe from Runhai is $400485/Bags on FOB terms from China. Prices may vary depending on order volume, packaging, and destination. For the most accurate bulk quote, send a direct RFQ to Runhai through EximNext.
What is the Minimum Order Quantity (MOQ) for Ductile Cast Iron Pipe?
The supplier, Runhai, has set a Minimum Order Quantity (MOQ) of 1 Bags for Ductile Cast Iron Pipe. For sample requests or smaller trial orders, contact the supplier directly through our platform's inquiry system.
What is the HS Code for Ductile Cast Iron Pipe?
For international shipping and customs clearance, Ductile Cast Iron Pipe is classified under HS Code 7303.00. Buyers should verify their local customs regulations to determine applicable import duties and taxes for this classification.
How can I import Ductile Cast Iron Pipe from China?
To import Ductile Cast Iron Pipe from China, negotiate shipping terms (FOB, CIF, or EXW) directly with Runhai. Ensure you have the necessary import licenses for Iron Pipes products in your destination country.
How can I check Runhai before ordering?
Open the Runhai company profile on EximNext to see the details the company has provided. Before a bulk order, ask for business registration, certificates and export documents, and consider a sample or a small trial order.
What are the key specifications of Ductile Cast Iron Pipe?
The key specifications for Ductile Cast Iron Pipe supplied by Runhai include K9, C25, C30 (ISO 2531 / EN 545 pressure classes), Ductile Iron with spheroidal graphite, high tensile strength, and DN80, DN100, DN150, DN200, DN250, DN300, DN350, DN400, DN500, DN600, DN700, DN800, DN900, DN1000, DN1200, DN1600, DN1800, DN2000. For a complete technical data sheet or Certificate of Analysis (COA), send an inquiry directly to the supplier through EximNext.
What packaging options are available for bulk orders of Ductile Cast Iron Pipe?
Runhai offers Ductile Cast Iron Pipe with standard export packaging. Custom packaging, private labeling, and OEM/ODM options may also be available for large wholesale orders.
Which countries import Ductile Cast Iron Pipe the most?
Ductile Cast Iron Pipe is actively imported by buyers worldwide. Request a destination-specific CIF or CFR quote from Runhai through our platform.
What certifications does this Ductile Cast Iron Pipe supplier hold?
Runhai maintains international quality certifications. These ensure that the Ductile Cast Iron Pipe meets international quality, safety, and regulatory standards required for cross-border trade.
How do I place a bulk order for Ductile Cast Iron Pipe on EximNext?
Click "Request Quotation" on this product page, specify your required quantity, preferred shipping terms, and destination country. Runhai will respond with a detailed wholesale quote including FOB pricing, lead time, and payment options.
What payment methods are accepted?
Common payment methods include Letter of Credit (L/C), Telegraphic Transfer (T/T), Documents against Payment (D/P), and Escrow services. Confirm accepted terms directly with Runhai.
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