Import 508mm Diameter Seamless Steel Pipe — Buy in wholesale FOB from Supplier in China
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508mm Diameter Seamless Steel Pipe
The 508mm diameter seamless steel pipe is a large-bore carbon steel tube manufactured by Dongying Lake Petroleum Technology Co., Ltd in Dongying, China. With a 508mm (20 inch) outer diameter, this pipe is produced in carbon steel Grade B conforming to API 5L Gr B and ASTM A106 Grade B specifications. The seamless construction eliminates the longitudinal weld seam found in welded pipe, providing uniform circumferential strength throughout the wall thickness.
Seamless pipe of this diameter and grade is typically supplied in random lengths of 6 to 12 metres, though exact length tolerances and end finishes should be confirmed with the supplier. The Grade B carbon steel composition offers a minimum yield strength of 241 MPa and tensile strength of 414 MPa under ASTM A106, with similar mechanical properties under API 5L. Wall thickness options vary by schedule, with heavy wall configurations available for high-pressure service. The pipe may be supplied plain end, bevelled, or with threaded and coupled ends depending on order requirements.
This 508mm seamless pipe serves oil and gas transmission pipelines, water distribution networks, structural piling, and mechanical engineering projects where pressure containment and structural integrity are critical. Buyers include pipeline contractors, municipal water authorities, oilfield service companies, and heavy construction firms. For import procurement, confirm the applicable standard (API 5L PSL1/PSL2 or ASTM A106), heat treatment condition, hydrostatic test pressure, and any supplementary NDE requirements with Dongying Lake Petroleum Technology before finalising specifications.
| Outer Diameter | 508 mm (20 inches) - nominal |
| Material Grade | Carbon Steel Grade B / API 5L Gr B / ASTM A106 Grade B |
| Manufacturing Process | Seamless (hot-finished or cold-drawn, confirm with supplier) |
| Typical Length Range | 6,000 - 12,000 mm (standard random lengths, typical) |
| Minimum Yield Strength | 241 MPa (35,000 psi) for ASTM A106 Grade B (standard) |
| Minimum Tensile Strength | 414 MPa (60,000 psi) for ASTM A106 Grade B (standard) |
| Wall Thickness Options | Multiple schedules available; heavy wall options confirmed on enquiry |
| End Finish | Plain end, bevelled, or threaded and coupled (confirm with supplier) |
| Applicable Standards | API 5L (line pipe), ASTM A106 (seamless carbon steel pipe for high-temperature service) |
| Typical Hydrostatic Test | 100% hydrostatic testing to standard requirements (standard); test pressure varies by wall thickness and grade (confirm with supplier) |
Dongying Lake Petroleum Technology Co., Ltd is located on Huanghe Road in Dongying, Shandong Province, with the postal code 257000. The company operates in China's petroleum equipment manufacturing corridor, a region with established supply chains for oilfield services and pipeline materials. The supplier's profile indicates an imported tier classification and harbour trust tier, though the response rate is recorded at 0.00% with no response time data available.
The listing positions the company as a source for 508mm seamless steel pipe targeting oil and gas transmission, water pipeline, structural construction, and mechanical engineering applications. No specific factory certifications, production capacity figures, years in operation, or named client references appear in the available profile data. Buyers should verify the company's manufacturing scope, whether it mills pipe directly or sources from partner mills, and its quality management system certification status before committing to orders.
The 508mm seamless steel pipe is a heavy-duty carbon steel tube suitable for oil and gas transmission, water pipelines, structural construction, and mechanical engineering applications. With a 508mm outer diameter, this large-bore seamless pipe meets international standards such as API 5L or ASTM A106. Ideal for import-export traders sourcing industrial piping at competitive bulk rates for infrastructure and energy sector projects worldwide.
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Sourcing 508mm Diameter Seamless Steel Pipe from Dongying Lake Petroleum Technology Co., Ltd - China Import Guide
Before placing an order with Dongying Lake Petroleum Technology Co., Ltd, verify the company's manufacturing credentials and quality management system certification. Request a current mill test certificate from a recent production batch to assess chemical and mechanical property consistency. Confirm that the pipe will be produced to the specific standard edition (API 5L 46th edition or ASTM A106/A106M latest revision) required by your project specification. If third-party inspection is needed, agree on the inspection body, scope, and witnessing protocol before production commences. Also clarify whether the supplier holds API monogram licence or other recognised manufacturing approvals relevant to pipeline materials.
Logistics for 508mm diameter pipe require careful planning due to the substantial dimensions and weight per metre. Confirm lead time from order confirmation to ex-works availability, as seamless pipe of this diameter may be produced to order rather than stocked. Sea freight from Dongying or nearby port (Qingdao, Tianjin, or Rizhao) will utilise breakbulk or containerised shipment depending on length and quantity. Negotiate Incoterms, with FOB or CIF being common for Chinese pipe exports, though DAP may be preferable for buyer control of inland destination haulage. Payment terms typically involve letter of credit or documentary collection, with T/T advance sometimes accepted for established relationships. Request the supplier's standard packing method, whether pipe is bundled with steel strapping or shipped as loose lengths, and how end protection is maintained.
Quality assurance on arrival begins with dimensional verification, measuring OD, wall thickness at multiple clock positions, and length against the mill certificate and purchase order. Perform visual inspection for surface defects, straightness, and end condition. Review the MTC for compliance with ordered grade, heat number traceability, and test result conformance. If specified, witness or review NDE records and Charpy test data. For pipeline projects, pre-inspection at the mill or third-party inspection before shipment is strongly recommended given the 0.00% response rate observed, which may indicate communication challenges requiring proactive quality planning. Retain samples for independent laboratory verification if certificate authenticity is in question, and ensure all documentation aligns with customs clearance and project quality file requirements.
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30 suppliersBuy 508mm Diameter Seamless S in Bulk — Verified Supplier in China
When sourcing 508mm Diameter Seamless Steel Pipe for your business, securing the right balance of quality and cost is essential. Dongying Lake Petroleum Technology Co., Ltd, a verified supplier based in China, offers this product with key specifications including API 5L Grade B / ASTM A106 Grade B / S355J2H equivalent, 508 mm (20 Inch Nominal), and SCH 30 / SCH 40 (8-12 mm typical, confirm with supplier). By purchasing directly from the manufacturer or authorized exporter, buyers can negotiate favorable FOB prices starting at $10700/Bags and manage bulk orders with a minimum order quantity (MOQ) of 1 Bags. This product is actively traded under HS Code 7304.23, making it a staple in the Steel Pipes sector with strong demand from importing countries worldwide.
508mm Diameter Seamless S Specifications, Trade Terms & Pricing
Importing 508mm Diameter Seamless S 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 7304.23 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 Dongying Lake Petroleum Technology Co., Ltd — Supplier in China
Finding trustworthy partners is the foundation of successful importing. The supplier of this 508mm Diameter Seamless S 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 Steel Pipes category and connect with top-tier exporters on our comprehensive global B2B marketplace. Start your sourcing journey today.
Import 508mm Diameter Seamless S — Shipping, Logistics & Customs
Importing 508mm Diameter Seamless S 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 7304.23 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 508mm Diameter Seamless S
What is the wholesale price of 508mm Diameter Seamless Steel Pipe?
The current listed wholesale price for 508mm Diameter Seamless Steel Pipe from Dongying Lake Petroleum Technology Co., Ltd is $10700/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 Dongying Lake Petroleum Technology Co., Ltd through EximNext.
What is the Minimum Order Quantity (MOQ) for 508mm Diameter Seamless S?
The supplier, Dongying Lake Petroleum Technology Co., Ltd, has set a Minimum Order Quantity (MOQ) of 1 Bags for 508mm Diameter Seamless S. For sample requests or smaller trial orders, contact the supplier directly through our platform's inquiry system.
What is the HS Code for 508mm Diameter Seamless Steel Pipe?
For international shipping and customs clearance, 508mm Diameter Seamless Steel Pipe is classified under HS Code 7304.23. Buyers should verify their local customs regulations to determine applicable import duties and taxes for this classification.
How can I import 508mm Diameter Seamless S from China?
To import 508mm Diameter Seamless S 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 Steel Pipes products in your destination country.
Is Dongying Lake Petroleum Technology Co., Ltd a verified supplier?
Yes, Dongying Lake Petroleum Technology 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 508mm Diameter Seamless Steel Pipe?
The key specifications for 508mm Diameter Seamless Steel Pipe supplied by Dongying Lake Petroleum Technology Co., Ltd include API 5L Grade B / ASTM A106 Grade B / S355J2H equivalent, 508 mm (20 Inch Nominal), and SCH 30 / SCH 40 (8-12 mm typical, confirm with supplier). 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 508mm Diameter Seamless S?
Dongying Lake Petroleum Technology Co., Ltd offers 508mm Diameter Seamless S with standard export packaging. Custom packaging, private labeling, and OEM/ODM options may also be available for large wholesale orders.
Which countries import 508mm Diameter Seamless S the most?
508mm Diameter Seamless S 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 508mm Diameter Seamless S supplier hold?
Dongying Lake Petroleum Technology Co., Ltd maintains international quality certifications. These ensure that the 508mm Diameter Seamless S meets international quality, safety, and regulatory standards required for cross-border trade.
How do I place a bulk order for 508mm Diameter Seamless Steel Pipe 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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