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Di Stepped Coupling by Jilin Senfeng Pipe Co., Ltd.
Harbor
Di Stepped Coupling - Image 1

Di Stepped Coupling

🕐Last updated: Jul 21, 2026
$1,200 - $2,200 / MT (Approx. Negotiable)/ Unit
Min. Order: 1 Unit
💱₹12,002,200.00/ Unit
Live rate: 1 USD = 1.00 INR
🔢HS Code7307.11
⚙️MaterialDuctile Iron (EN-GJS-450-10 / ASTM A536 65-45-12)
📁CategoryFlanges
💳Payment TermsT/T · L/C · D/P
Escrow Payment Available on EximNext
Pay your way — T/T, L/C, or opt for Escrow for full protection. Your deal, your choice.
Buy & Import Di Stepped Coupling from Jilin Senfeng Pipe Co., Ltd. - Wholesale Supply

The Di Stepped Coupling from Jilin Senfeng Pipe Co., Ltd. is a ductile iron fitting designed to connect pipes of differing diameters in water, sewage, and industrial systems. It conforms to DN50 sizing standards and is manufactured from EN-GJS-450-10 / ASTM A536 65-45-12 ductile iron, offering tensile strength of at least 450 MPa and elongation of 10% minimum. The coupling features a machined sealing surface and internal grooves compatible with rubber gaskets to ensure leak resistance under operational pressures up to 16 bar.

This fitting is produced using sand-cast ductile iron with controlled cooling to achieve a uniform microstructure, minimizing internal porosity. The surface finish is typically ground to a Ra value of 3.2 µm for optimal gasket seating. While the supplier does not specify coating, standard industry practice for such couplings includes internal epoxy lining or external bituminous coating for corrosion resistance in aggressive soils or wastewater environments. Variants may include flanged ends for direct bolt-on connections to standard ISO 7005-2 flanges.

These couplings are commonly purchased by municipal utilities, civil contractors, and industrial plant engineers for pipeline rehabilitation and new infrastructure projects. Buyers typically order in quantities of 50 to 500 units per shipment, packed in wooden crates or palletized with plastic caps to protect sealing surfaces. Trade terms are commonly FOB Dalian or CIF port of destination, with lead times averaging 25 to 40 days after order confirmation.

Technical Specifications for Jilin Senfeng Pipe Co., Ltd. Di Stepped Coupling
MaterialDuctile Iron (EN-GJS-450-10 / ASTM A536 65-45-12)
Nominal SizeDN50
Pressure Rating16 bar
Tensile Strength450 MPa minimum
Elongation10% minimum
Surface FinishGround to Ra 3.2 µm typical
Sealing MethodRubber gasket, compatible with ISO 4633
Flange CompatibilityISO 7005-2 Class 16 typical
WeightApproximately 4.2 kg per unit typical
CoatingInternal epoxy or external bituminous coating standard for wastewater applications
About Jilin Senfeng Pipe Co., Ltd. - Pipe Fittings Supplier in China
🏭
Jilin Senfeng Pipe Co., Ltd.
China Harbor
4.5(0)

Jilin Senfeng Pipe Co., Ltd. is a manufacturer based in Panshi, Jilin Province, China, specializing in ductile iron pipe fittings for water and industrial systems. The company operates from a facility with casting, machining, and quality control lines, and its trust tier is listed as harbor, indicating verified business registration and export capability. The supplier does not publish certifications, production volume, or client lists, and response metrics are not available on the listing.

The company focuses on producing fittings such as elbows, tees, and stepped couplings for export markets, with no public claims about years in operation, employee count, or domestic market presence. All product information derives from the technical specifications provided, with no additional claims about certifications, awards, or in-house testing facilities. Buyers should verify capabilities directly with the supplier before placing bulk orders.

The DI Stepped Coupling is a ductile iron pipe fitting designed for joining pipes of different diameters in water, sewage, and industrial pipeline systems. Engineered to DN50 sizing standards, this stepped coupling ensures a secure, leak-proof connection in demanding environments. Ideal for import and export trade, it meets international flange standards and is widely used in municipal water supply, construction, and oil and gas infrastructure projects worldwide.

Business TypeSupplier
Year EstablishedRecently Joined
EmployeesContact Supplier
Annual RevenueContact Supplier
Main ProductsView Products Tab
Major MarketsGlobal
Response Time<4h
Response RateNew Supplier
Frequently Asked Questions About Di Stepped Coupling from Jilin Senfeng Pipe Co., Ltd.
The material complies with ASTM A536 65-45-12, which requires a minimum elongation of 10%. This ensures the fitting can withstand ground movement and thermal stress without brittle fracture. Buyers should request a mill test report verifying this value for each production batch.

Sourcing Di Stepped Coupling from Jilin Senfeng Pipe Co., Ltd. - China Import Guide

Before ordering, verify the material certification for EN-GJS-450-10 or ASTM A536 65-45-12, and request a mill test report showing tensile strength, elongation, and chemical composition. Confirm the surface finish meets Ra 3.2 µm and that the internal bore tolerances are within ±0.5 mm. Insist on a pressure test certificate for each batch, as this is critical for pipeline integrity. Do not accept products without documented compliance to these standards.

Lead time is typically 25 to 40 days after order confirmation, depending on production scheduling. Confirm Incoterms with the supplier - FOB Dalian is common, but CIF or CFR may be available. Packaging is usually in wooden crates with plastic caps to protect sealing surfaces. Payment terms are typically 30% advance, 70% against BL copy. Always clarify who is responsible for customs clearance and import duties at destination.

Perform a visual inspection upon receipt for surface cracks, machining burrs, or coating defects. Use a hardness tester to verify ductile iron properties, and check gasket seating surfaces for flatness. Request a certificate of conformity and packing list matching the order. For large shipments, consider third-party inspection at origin, especially for projects requiring compliance with municipal or engineering codes.

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Jilin Senfeng Pipe Co., Ltd.
China
Harbor
<4h
Response Time
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Products
4.5(0)
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Buy Di Stepped Coupling in Bulk — Verified Supplier in China

When sourcing Di Stepped Coupling for your business, securing the right balance of quality and cost is essential. Jilin Senfeng Pipe Co., Ltd., a verified supplier based in China, offers this product with key specifications including DI Stepped Coupling, Ductile Iron (EN-GJS-450-10), and DN50 (2 inch). By purchasing directly from the manufacturer or authorized exporter, buyers can negotiate favorable FOB prices starting at $1,2002,200./Unit and manage bulk orders with a minimum order quantity (MOQ) of 1 Unit. This product is actively traded under HS Code 7307.11, making it a staple in the Flanges sector with strong demand from importing countries worldwide.

Di Stepped Coupling Specifications, Trade Terms & Pricing

Importing Di Stepped Coupling requires careful attention to shipping logistics, customs compliance, and secure payment terms. Jilin Senfeng Pipe Co., Ltd. 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 7307.11 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 B2B marketplace designed to make cross-border trade secure and efficient.

About Jilin Senfeng Pipe Co., Ltd. — Supplier in China

Finding trustworthy partners is the foundation of successful importing. The supplier of this Di Stepped Coupling has been verified on our platform. 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 verified manufacturers and exporters across 200+ countries. Explore similar products in the Flanges category and connect with top-tier exporters on our comprehensive global B2B marketplace. Start your sourcing journey today.

Import Di Stepped Coupling — Shipping, Logistics & Customs

Importing Di Stepped Coupling 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 7307.11 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 Di Stepped Coupling

What is the wholesale price of Di Stepped Coupling?

The current listed wholesale price for Di Stepped Coupling from Jilin Senfeng Pipe Co., Ltd. is $1,2002,200./Unit 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 Jilin Senfeng Pipe Co., Ltd. through EximNext.

What is the Minimum Order Quantity (MOQ) for Di Stepped Coupling?

The supplier, Jilin Senfeng Pipe Co., Ltd., has set a Minimum Order Quantity (MOQ) of 1 Unit for Di Stepped Coupling. For sample requests or smaller trial orders, contact the supplier directly through our platform's inquiry system.

What is the HS Code for Di Stepped Coupling?

For international shipping and customs clearance, Di Stepped Coupling is classified under HS Code 7307.11. Buyers should verify their local customs regulations to determine applicable import duties and taxes for this classification.

How can I import Di Stepped Coupling from China?

To import Di Stepped Coupling from China, negotiate shipping terms (FOB, CIF, or EXW) directly with Jilin Senfeng Pipe Co., Ltd.. Ensure you have the necessary import licenses for Flanges products in your destination country.

Is Jilin Senfeng Pipe Co., Ltd. a verified supplier?

Yes, Jilin Senfeng Pipe Co., Ltd. is a verified supplier on EximNext. You can view their complete company profile, business registration details, certifications, and export history before placing a bulk order.

What are the key specifications of Di Stepped Coupling?

The key specifications for Di Stepped Coupling supplied by Jilin Senfeng Pipe Co., Ltd. include DI Stepped Coupling, Ductile Iron (EN-GJS-450-10), and DN50 (2 inch). 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 Di Stepped Coupling?

Jilin Senfeng Pipe Co., Ltd. offers Di Stepped Coupling with standard export packaging. Custom packaging, private labeling, and OEM/ODM options may also be available for large wholesale orders.

Which countries import Di Stepped Coupling the most?

Di Stepped Coupling is actively imported by buyers worldwide. Request a destination-specific CIF or CFR quote from Jilin Senfeng Pipe Co., Ltd. through our platform.

What certifications does this Di Stepped Coupling supplier hold?

Jilin Senfeng Pipe Co., Ltd. maintains international quality certifications. These ensure that the Di Stepped Coupling meets international quality, safety, and regulatory standards required for cross-border trade.

How do I place a bulk order for Di Stepped Coupling on EximNext?

Click "Request Quotation" on this product page, specify your required quantity, preferred shipping terms, and destination country. Jilin Senfeng Pipe Co., Ltd. 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 Jilin Senfeng Pipe Co., Ltd..

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