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Weld Neck Flanges
Dongying Lake Petroleum Technology Co., Ltd manufactures API 6A weld neck flanges from carbon steel, stainless steel grades 304/316 and various alloy steels. The flanges are engineered for high‑pressure and high‑temperature oil and gas service, with pressure classes of 1500, 2500 and 5000 psi available across diameters from 1 inch to 24 inch. Each unit complies with API 6A standards and can be supplied with custom machining or finishing to meet project‑specific requirements.
Carbon steel versions typically follow ASTM A105, while stainless steel options adhere to ASTM A182 specifications, providing corrosion resistance in aggressive environments. Typical flange thickness follows standard schedule 40 dimensions, and the flat‑face design ensures a uniform sealing surface. Temperature ratings generally span - 100 °C to 400 °C for carbon steel and up to 600 °C for alloy steel, matching industry expectations for upstream petroleum applications.
These flanges are essential components for pipelines in oil and gas extraction, petrochemical processing and power generation facilities. Dongying Lake Petroleum Technology can accommodate flexible minimum order quantities and ships under FOB or CIF terms after buyer confirmation. Prospective buyers should request the supplier’s material test certificates and verify compliance with API 6A before finalising a contract.
| Material | Carbon steel, stainless steel 304/316, alloy steel (standard grades) |
| Standard | API 6A (mandatory compliance) |
| Pressure class | 1500, 2500, 5000 psi (typical range) |
| Diameter range | 1 in - 24 in (standard sizes) |
| Flange thickness | Schedule 40 (typical for API 6A) |
| Temperature rating | - 100 °C to 400 °C for carbon steel, up to 600 °C for alloy steel (typical limits) |
| Facing type | Flat face (standard for API 6A) |
| Bolt circle diameter | Typical range per size, per API 6A tables (standard) |
| Number of bolt holes | Typical 4‑8 holes depending on size (standard) |
| Certification | ISO and SGS certifications claimed (confirm with supplier) |
Dongying Lake Petroleum Technology Co., Ltd is based on Huanghe Road in Dongying, China and is classified under the imported supplier tier with a harbor trust tier. The profile shows a response rate of 0.00 and no recorded average response time, so buyers should verify current communication responsiveness before initiating negotiations.
The company specialises in supplying petroleum‑industry components, with a focus on API‑compliant flanges for high‑pressure applications. While the listing mentions flexible MOQ and competitive pricing, no specific order quantities or price points are disclosed; interested buyers must request a formal quotation and any applicable quality certificates such as ISO 9001 or SGS inspection reports.
API 6A weld neck flanges are engineered for high-pressure and high-temperature oil and gas applications, offering superior structural integrity through a buttweld connection that minimizes stress concentration. These flanges meet stringent industry standards and are widely sourced for upstream petroleum, refinery, and petrochemical projects. As a high-demand industrial import commodity, weld neck flanges are traded globally with competitive pricing influenced by material grade, pressure class, and size specifications.
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Sourcing Weld Neck Flanges from Dongying Lake Petroleum Technology Co., Ltd - China Import Guide
When ordering weld neck flanges, first confirm the exact material grade, pressure class and diameter required for your pipeline, and request the supplier’s material test reports to verify compliance with API 6A. Validate that the flange face type (flat‑face) matches your system design and that the bolt circle dimensions align with your bolting hardware. Asking for a mill test report will help ensure the product meets the mechanical properties you expect.
Discuss shipping logistics early, specifying whether you prefer FOB from the Dongying port or CIF to your destination port, and clarify the expected production lead‑time for the chosen size and material. Confirm the Incoterm, payment method and any required advance deposits, as these terms affect cash flow and risk allocation. Aligning on these details before contract signing reduces the chance of unexpected delays or cost overruns.
Arrange for an independent inspection agency to perform a pre‑shipment check, focusing on dimensions, material composition and weld quality. Request the supplier’s certification package, including ISO, SGS and any third‑party test results, to support your quality assurance process. Maintaining rigorous inspection and documentation practices will help you receive flanges that fulfil the performance and safety standards required for critical oil and gas infrastructure.
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30 suppliersBuy Weld Neck Flanges in Bulk — Supplier in China
When sourcing Weld Neck Flanges for your business, securing the right balance of quality and cost is essential. Dongying Lake Petroleum Technology Co., Ltd, a supplier based in China, offers this product with key specifications including API 6A / ANSI B16.5 / ASME B16.47, 2000 PSI - 15000 PSI (Class 150 - Class 1500), and 1/2 inch - 24 inches (DN 15 - DN 600). By purchasing directly from the manufacturer or authorized exporter, buyers can negotiate favorable FOB prices starting at $15 – $450 / pc and manage bulk orders with a minimum order quantity (MOQ) of 1 Unit. This product is actively traded under HS Code 7307.91, making it a staple in the Flanges sector with strong demand from importing countries worldwide.
Weld Neck Flanges Specifications, Trade Terms & Pricing
Importing Weld Neck Flanges requires careful attention to shipping logistics, customs compliance, and secure payment terms. Dongying Lake Petroleum Technology 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 7307.91 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 online B2B marketplace designed to make cross-border trade secure and efficient.
About Dongying Lake Petroleum Technology Co., Ltd — Supplier in China
Finding trustworthy partners is the foundation of successful importing. Ask the supplier of this Weld Neck Flanges 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 Flanges category and connect with top-tier exporters on our comprehensive B2B marketplace. Start your sourcing journey today.
Import Weld Neck Flanges — Shipping, Logistics & Customs
Importing Weld Neck Flanges 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 7307.91 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 Weld Neck Flanges
What is the wholesale price of Weld Neck Flanges?
The current listed wholesale price for Weld Neck Flanges from Dongying Lake Petroleum Technology Co., Ltd is $15 – $450 / pc 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 Dongying Lake Petroleum Technology Co., Ltd through EximNext.
What is the Minimum Order Quantity (MOQ) for Weld Neck Flanges?
The supplier, Dongying Lake Petroleum Technology Co., Ltd, has set a Minimum Order Quantity (MOQ) of 1 Unit for Weld Neck Flanges. For sample requests or smaller trial orders, contact the supplier directly through our platform's inquiry system.
What is the HS Code for Weld Neck Flanges?
For international shipping and customs clearance, Weld Neck Flanges is classified under HS Code 7307.91. Buyers should verify their local customs regulations to determine applicable import duties and taxes for this classification.
How can I import Weld Neck Flanges from China?
To import Weld Neck Flanges from China, negotiate shipping terms (FOB, CIF, or EXW) directly with Dongying Lake Petroleum Technology Co., Ltd. Ensure you have the necessary import licenses for Flanges products in your destination country.
How can I check Dongying Lake Petroleum Technology Co., Ltd before ordering?
Open the Dongying Lake Petroleum Technology Co., Ltd 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 Weld Neck Flanges?
The key specifications for Weld Neck Flanges supplied by Dongying Lake Petroleum Technology Co., Ltd include API 6A / ANSI B16.5 / ASME B16.47, 2000 PSI - 15000 PSI (Class 150 - Class 1500), and 1/2 inch - 24 inches (DN 15 - DN 600). 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 Weld Neck Flanges?
Dongying Lake Petroleum Technology Co., Ltd offers Weld Neck Flanges with standard export packaging. Custom packaging, private labeling, and OEM/ODM options may also be available for large wholesale orders.
Which countries import Weld Neck Flanges the most?
Weld Neck Flanges is actively imported by buyers worldwide. Request a destination-specific CIF or CFR quote from Dongying Lake Petroleum Technology Co., Ltd through our platform.
What certifications does this Weld Neck Flanges supplier hold?
Dongying Lake Petroleum Technology Co., Ltd maintains international quality certifications. These ensure that the Weld Neck Flanges meets international quality, safety, and regulatory standards required for cross-border trade.
How do I place a bulk order for Weld Neck Flanges on EximNext?
Click "Request Quotation" on this product page, specify your required quantity, preferred shipping terms, and destination country. Dongying Lake Petroleum Technology 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 Dongying Lake Petroleum Technology Co., Ltd.
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