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Weld Neck Flange
The weld neck flange offered by Dongying Lake Petroleum Technology Co., Ltd is a forged joining component designed for high‑pressure piping. It is supplied in carbon steel ASTM A105 and stainless steel ASTM A182 F304, conforming to API 6A. The product covers nominal pipe sizes from ½ in to 60 in and pressure classes 150 to 2500. The long tapered hub is welded directly to the pipe, providing leak‑proof and vibration‑resistant connections.
Carbon‑steel grades meet the requirements for oil‑field service, while the 304 stainless version resists corrosion in petrochemical environments. Typical industry practice calls for a face finish of class 2B and a bolt circle drilled to ASME B16.5 tolerances. These flanges are commonly forged and heat‑treated to achieve a minimum tensile strength of 70 % of the material’s yield point. The API 6A design is recognised for upstream, mid‑stream and downstream applications worldwide.
Major users include EPC contractors, refinery operators and pipeline installers who need reliable connections in high‑temperature, high‑pressure lines. The supplier ships the flanges in bundled crates with FOB or CIF options, though exact incoterms should be confirmed per order. No minimum order quantity is disclosed, so buyers should request a quotation for their required sizes and pressure class. Prospective purchasers are advised to verify the material certificates and forging test reports before finalising the contract.
| Material | Carbon Steel ASTM A105 / Stainless Steel ASTM A182 F304 |
| Standard | API 6A (oil and gas flange standard) |
| Size range | Nominal pipe size ½ in to 60 in |
| Pressure class | Class 150 to 2500 |
| Hub type | Long tapered hub, butt‑welded to pipe |
| Typical face finish | Class 2B face finish (typical) |
| Typical bolt circle tolerance | Bolt circle tolerance ±0.1 mm (standard for ASME B16.5) |
| Typical material tensile strength | Minimum tensile strength 70 % of yield (typical for API 6A flanges) |
| Typical packaging | Crated in wooden pallets, each pallet holding up to 20 flanges (typical) |
| Typical inspection | Visual and ultrasonic inspection per API 6A (standard) |
Dongying Lake Petroleum Technology Co., Ltd is based at Huanghe Road, Dongying, Shandong Province, China. The company is listed as an imported supplier with a harbor trust tier, indicating compliance with basic verification standards on the platform. Its response metrics show a 0 % response rate and no recorded average response time, suggesting that enquiries may require follow‑up through alternative contact channels.
The firm specialises in manufacturing and exporting API‑compliant pressure‑equipment, including weld neck flanges for oil‑field and petrochemical projects. While the product page confirms material grades and API 6A compliance, the supplier does not disclose production capacity, lead time or certification details, so buyers should request those documents directly. The listing does not mention any ISO or CE certificates, therefore verification of quality certificates is advisable before purchase.
API 6A Weld Neck Flanges are engineered for high-pressure oil and gas, petrochemical, and refinery piping systems, providing leak-proof and vibration-resistant connections. These forged flanges feature a long tapered hub that welds directly to the pipe, ensuring maximum strength under demanding conditions. Widely traded internationally, weld neck flanges are essential for upstream, midstream, and downstream energy applications and are typically sourced in sizes ranging from 1/2 inch to 60 inches in pressure classes 150 through 2500.
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Sourcing Weld Neck Flange from Dongying Lake Petroleum Technology Co., Ltd - China Import Guide
Before placing an order with Dongying Lake Petroleum Technology Co., Ltd, importers should obtain the mill test report and forging inspection certificate to confirm the ASTM A105 or ASTM A182 F304 grades. Request the API 6A compliance stamp and verify that the pressure class and size markings match the engineering drawings. Because the supplier’s response rate is recorded as zero, establishing a reliable point of contact through email or phone is essential.
The company lists FOB and CIF terms, but the precise incoterm, vessel schedule and freight charges must be agreed in the sales contract. Buyers should clarify the lead time for forging, machining and final inspection, as these stages affect project timelines. For large‑diameter flanges, discuss the availability of custom crating or container loading to avoid damage during transit.
It is advisable to arrange a third‑party inspection at the factory, covering dimensional verification, surface finish and pressure testing in accordance with API 6A. Obtain the inspection report and retain it for customs clearance and quality assurance. Ensure that the supplier can provide the required documentation, such as CE or ISO certificates, if those standards are part of the buyer’s procurement policy.
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30 suppliersBuy Weld Neck Flange in Bulk — Supplier in China
When sourcing Weld Neck Flange 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 Weld Neck Flange (WN), API 6A / ASME B16.5 / ANSI B16.47, and Class 150 to Class 2500 (or API 6A PSL1/PSL2). By purchasing directly from the manufacturer or authorized exporter, buyers can negotiate favorable FOB prices starting at $8 – $45 / kg 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 Flange Specifications, Trade Terms & Pricing
Importing Weld Neck Flange 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 global 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 Flange 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 import export marketplace. Start your sourcing journey today.
Import Weld Neck Flange — Shipping, Logistics & Customs
Importing Weld Neck Flange 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 Flange
What is the wholesale price of Weld Neck Flange?
The current listed wholesale price for Weld Neck Flange from Dongying Lake Petroleum Technology Co., Ltd is $8 – $45 / kg 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 Flange?
The supplier, Dongying Lake Petroleum Technology Co., Ltd, has set a Minimum Order Quantity (MOQ) of 1 Unit for Weld Neck Flange. 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 Flange?
For international shipping and customs clearance, Weld Neck Flange 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 Flange from China?
To import Weld Neck Flange 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 Flange?
The key specifications for Weld Neck Flange supplied by Dongying Lake Petroleum Technology Co., Ltd include Weld Neck Flange (WN), API 6A / ASME B16.5 / ANSI B16.47, and Class 150 to Class 2500 (or API 6A PSL1/PSL2). 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 Flange?
Dongying Lake Petroleum Technology Co., Ltd offers Weld Neck Flange 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 Flange the most?
Weld Neck Flange 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 Flange supplier hold?
Dongying Lake Petroleum Technology Co., Ltd maintains international quality certifications. These ensure that the Weld Neck Flange meets international quality, safety, and regulatory standards required for cross-border trade.
How do I place a bulk order for Weld Neck Flange 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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