Import Coupling — Buy in Bulk from Supplier in China
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Couplings from Dongying Lake Petroleum Technology Co., Ltd are short lengths of pipe designed to connect two joints of tubing or casing, featuring painted colour codes on their external surface to indicate grade compliance. The products adhere to API 5CT and 5B specifications, ensuring compatibility with standard oilfield tubing and casing systems. These couplings are manufactured for use in demanding downhole environments where structural integrity is critical.
The material composition typically includes carbon or alloy steel, with colour codes applied to signify grade variations such as H-40, J-55, K-55, N-80, or P-110, in line with API standards. Standard dimensions range from 4.5 to 20 inches in outer diameter, with wall thicknesses varying to match the connected pipe’s specifications. The couplings are threaded internally to match the external threads of the tubing or casing, ensuring a secure, pressure-tight connection.
These couplings are primarily used in oil and gas extraction, where they facilitate the assembly of drill strings and production tubing. Buyers typically include oilfield service companies, drilling contractors, and equipment distributors sourcing for exploration or production projects. The couplings are supplied in bulk, with packaging and lead times determined by the project scale and specific grade requirements.
| Product Type | Short-length pipe coupling for tubing or casing |
| Standard Compliance | API 5CT and 5B |
| Grade Identification | Painted colour codes (e.g., H-40, J-55, K-55, N-80, P-110) |
| Material | Carbon or alloy steel (typical for API grades) |
| Outer Diameter Range | 4.5 to 20 inches (standard for API couplings) |
| Thread Type | Internal threads (API standard) |
| Wall Thickness | Varies by connected pipe specification (typical) |
| Application | Oilfield tubing and casing connections |
| Surface Finish | Painted (colour-coded by grade) |
| Pressure Rating | Varies by grade and API standard (confirm with supplier) |
Dongying Lake Petroleum Technology Co., Ltd is based in Dongying, Shandong Province, China, with its registered address at Huanghe Road, 257000. The company operates as an imported-tier supplier, specialising in oilfield equipment and accessories, including couplings manufactured to API standards.
The supplier’s trust tier is classified as harbor, indicating a verified operational presence, though the response rate and average response hours are currently recorded as zero. The company’s profile does not provide additional details on history, production capacity, or certifications beyond the API compliance stated in the product description.
| 企业类型 | Supplier |
| 成立年份 | Contact Supplier |
| Employees | Contact Supplier |
| Annual Revenue | Contact Supplier |
| Main Products | View Products Tab |
| Major Markets | Global |
| 响应时间 | <4h |
| 响应率 | Contact Supplier |
Sourcing Coupling from Dongying Lake Petroleum Technology Co., Ltd - China Import Guide
Before ordering, verify the coupling grade and its compatibility with your tubing or casing specifications, as mismatched grades can lead to connection failures. Confirm that the colour-coded grade matches the API standard required for your project, and request material test reports to ensure compliance with mechanical properties.
Discuss logistics details such as packaging, which is typically bulk for oilfield projects, and confirm lead times, as these can vary based on order volume and production schedules. Clarify Incoterms, with FOB or CFR being common for international shipments from China, and agree on payment terms to avoid delays in delivery.
Inspect the couplings upon arrival for dimensional accuracy, thread integrity, and surface finish, using calipers and thread gauges to verify compliance with API standards. Request hydrostatic test certificates to confirm pressure resistance, and ensure all documentation, including mill test reports and API compliance certificates, is provided for quality assurance.
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30 suppliersBuy & Import Coupling — Wholesale Supply from China
Securing a reliable supply chain for Coupling is critical for maintaining your business operations. Dongying Lake Petroleum Technology Co., Ltd, a verified supplier located in China, provides high-quality Coupling ready for international export. By connecting directly with this supplier, buyers can bypass intermediaries, negotiate custom wholesale pricing, and arrange bulk shipments. This product is a key offering within the Industrial Couplings industry, catering to distributors, wholesalers, and importers worldwide.
Request Wholesale Pricing & Bulk Trade Terms
Navigating the complexities of global sourcing is easier when you have direct access to the right manufacturers and exporters. When importing Coupling from China, buyers can discuss shipping logistics, packaging requirements, and preferred payment terms directly with Dongying Lake Petroleum Technology Co., Ltd. This seamless communication is powered by EximNext, a premier online B2B marketplace that connects ambitious buyers with verified global sellers across every major industry.
About Dongying Lake Petroleum Technology Co., Ltd — Verified Supplier in China
We understand that verifying supplier credentials is a top priority for importers. Dongying Lake Petroleum Technology Co., Ltd is part of our extensive network of vetted international exporters. Browse more products in the Industrial Couplings category or discover new suppliers across the Industrial Couplings sector. Expand your sourcing capabilities through our trusted B2B marketplace — the import export marketplace built for serious international trade.
International Shipping & Import Guidelines for Coupling
When importing Coupling from China, buyers should consider shipping terms (FOB, CIF, EXW), customs documentation requirements, and payment security. Contact the supplier to discuss the best logistics options for your destination country.
Frequently Asked Questions About Coupling
How can I get the wholesale price for Coupling?
Click the "Request Quotation" button to contact Dongying Lake Petroleum Technology Co., Ltd directly. The supplier will provide a custom quote based on your required bulk quantity and shipping destination.
Can I buy Coupling in bulk from China?
Yes, Dongying Lake Petroleum Technology Co., Ltd provides Coupling for bulk export from China. You can negotiate the MOQ, packaging details, and shipping terms directly with the supplier.
What shipping terms are available for this product?
Shipping terms such as FOB, CIF, or EXW can be negotiated directly with Dongying Lake Petroleum Technology Co., Ltd. Contact the supplier to discuss the best logistics options for importing Coupling to your country.
How do I request a sample of Coupling?
Send a direct message to Dongying Lake Petroleum Technology Co., Ltd through our platform to request a product sample before committing to a large wholesale order.
Is it safe to source products from this supplier?
Dongying Lake Petroleum Technology Co., Ltd is a registered and verified supplier on EximNext. We recommend using our secure messaging system and standard international payment methods (L/C, T/T, Escrow).
What specifications should I ask for when importing Coupling?
Request a detailed product data sheet including grade, purity, dimensions, material composition, and applicable industry standards from Dongying Lake Petroleum Technology Co., Ltd.
Does Dongying Lake Petroleum Technology Co., Ltd offer custom packaging or private labeling?
Many suppliers on EximNext, including Dongying Lake Petroleum Technology Co., Ltd, offer custom packaging and private label options for bulk wholesale orders.
What payment methods are accepted for international orders?
Common payment methods include Letter of Credit (L/C), Telegraphic Transfer (T/T), Documents against Payment (D/P), and Escrow services.
Can I find more Industrial Couplings suppliers on EximNext?
Yes, EximNext hosts a wide network of verified Industrial Couplings manufacturers, exporters, and wholesalers across 200+ countries.
How do I contact Dongying Lake Petroleum Technology Co., Ltd for a bulk trade inquiry?
Click "Request Quotation" or "Contact Supplier" on this page. Include your required quantity, destination country, and preferred shipping terms. All communications are managed securely through our online B2B marketplace.
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