Basic Info.
Model NO.
L245 / Gr. B, L290 / X42, L320 / X46, L360 / X52
After-sales Service
24h Online
Technique
Hot/Cold Rolled, Cold Draw, ERW, Saw, Efw, Extrude
Material
Carbon, Stainless, Alloy
Surface Treatment
Black/Varnishing/Polished/Oiled/Galvanized
Usage
Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Food/Beverage/Dairy Products, Machinery Industry, Chemical Industry, Mining, Construction & Decoration, Special Purpose
Price Terms
EXW/Fob/CIF/CFR
Grade
L245 / Gr.B L290 / X42 L320 / X46 L360 / X52 L390
Delivery
at Stock or 7-15 Days According to The Quantity
Certificate
CCS, ABS, ISO9001
Standard and Grade-01
L245 / Gr.B, L290 / X42, L320 / X46
Standard and Grade-02
L360 / X52, L390 / X56, L415 / X60, L450 / X65, L4
Secondary or Not
Non-Secondary
Transport Package
Neutral Standard Export Seaworthy Packing
Specification
customizable
Product Description
Product Description
We supply high-quality seamless steel tubes specifically engineered for oil and gas downhole applications, including casing and tubing. Our products are manufactured to meet stringent international standards, ensuring superior performance in demanding environments. Key grades include J55, K55, N80 (including N80Q), L80, C90, T95, P110, and Q125, covering a wide range of mechanical and corrosion-resistant properties. These tubes are available in various configurations such as EUE (External Upset End) and NUE (Non-Upset End) threading, including Buttress Thread profiles for enhanced connection integrity. Ideal for standard, high-pressure, deep well, and sour service conditions, our tubes deliver reliable strength, durability, and resistance to collapse and corrosion. Trust our seamless solutions for efficient and safe operations in your next drilling or completion project.
Standard:
GB/T9711--Conforming to the esteemed China National Standard, our products reflect superior craftsmanship and precision.
Uses:
Specifically designed for the seamless transportation of oxygen, water, and oil, these pipes are a cornerstone in the oil and gas industry, ensuring safe and efficient conveyance.
Main production steel pipe grades:
We offer an extensive range of steel pipe grades including L245 / Gr.B, L290 / X42, L320 / X46, L360 / X52, L390 / X56, L415 / X60, L450 / X65, and L485 / X70, each tailored to meet diverse industry requirements with precision.
Dimensional tolerances:
| Pipe Types | Diameter(D) | Wall thickness(S) |
| Outer diameter of steel pipe(mm) | Permissible deviation(mm) | Wall thickness of steel pipe(mm) | Permissible deviation(mm) |
| Steel Pipes | ≥60.3,S<20 | ±0.75% | ≤73.0 | +15%,-12.5% |
| ≥60.3,S≥20 | ±1.00% | >73.0,S<20 | +15%,-12.5% |
| | | >73.0,S≥20 | +17.5%,-10 |
Chemical composition:
| Standard | Grade | Chemical Components(%) |
| C | Si | Mn | P | S | Cr | Ni | Cu |
| GB/T9711.2 | L245 /Gr.B | ≤0.28 | / | ≤1.2 | ≤0.03 | ≤0.03 | ≤0.50 | ≤0.50 | ≤0.50 |
| L290 / X42 | ≤0.28 | / | ≤1.3 | ≤0.03 | ≤0.03 | ≤0.50 | ≤0.50 | ≤0.50 |
| L320 / X46 | ≤0.28 | / | ≤1.4 | ≤0.03 | ≤0.03 | ≤0.50 | ≤0.50 | ≤0.50 |
| L360 / X52 | ≤0.28 | / | ≤1.4 | ≤0.03 | ≤0.03 | ≤0.50 | ≤0.50 | ≤0.50 |
| L390 / X56 | ≤0.28 | / | ≤1.4 | ≤0.03 | ≤0.03 | ≤0.50 | ≤0.50 | ≤0.50 |
| L415 / X60 | ≤0.28 | / | ≤1.4 | ≤0.03 | ≤0.03 | ≤0.50 | ≤0.50 | ≤0.50 |
| L450 / X65 | ≤0.28 | / | ≤1.4 | ≤0.03 | ≤0.03 | ≤0.50 | ≤0.50 | ≤0.50 |
| L485 / X70 | ≤0.28 | / | ≤1.4 | ≤0.03 | ≤0.03 | ≤0.50 | ≤0.50 | ≤0.50 |
Mechanical properties:
| Standard | Grade | Tensile strength (MPa) | Yield strength (MPa) | Elongation (%) |
| GB/T9711.2 | L245 / Gr.B | ≥415 | ≥245 | ≥18 |
| L290 / X42 | ≥415 | ≥290 | ≥18 |
| L320 / X46 | ≥435 | ≥320 | ≥18 |
| L360 / X52 | ≥460 | ≥360 | ≥18 |
| L390 / X56 | ≥490 | ≥390 | ≥18 |
| L415 / X60 | ≥520 | ≥415 | ≥18 |
| L450 / X65 | ≥535 | ≥450 | ≥18 |
| L485 / X70 | ≥570 | ≥485 | ≥18 |
Detailed Photos
Certifications
Packaging & Shipping
Packing Details:
1. Secure Export Packaging: Utilizing sea-worthy methods combined with water-proof paper to ensure maximum protection.
2. Professional Loading and Fixing: Entrust our skilled teams to handle safe loading and secure fixing, guaranteeing your products are well-protected during transportation.
Delivery Detail: Expect swift delivery within 7-10 working days after the deposit is received, or as per the quantity specified in your order.
Company Profile
Wuxi Tongno Special Steel Co., Ltd. Established in 2013 with a registered capital of 5 million yuan, Wuxi Tongno Special Steel Co., Ltd. has swiftly become a leader in the professional manufacture of seamless steel pipes. Over the years, Wuxi Tongno Special Steel Co., Ltd. has expanded to operate three cutting-edge seamless steel pipe production lines, each designed to meet the highest standards of quality and efficiency.
Wuxi Tongno Special Steel Co., Ltd. stands by its unwavering commitment to the 'quality first, customer first' business philosophy. Our innovative production processes ensure products of superior precision, accommodating a diverse range of wall thicknesses and offering small-batch, wide-variety options with rapid delivery. We are proud to be at the forefront of domestic production, particularly excelling in the manufacture of small-diameter medium-thick-walled and large-calibre thin-walled alloy seamless steel pipes. Our exceptional products are renowned both nationally and internationally, playing a pivotal role in diverse project constructions and showcasing our unrivaled manufacturing prowess.
Our Advantages
1. Exceptional Service Excellence: We ensure a prompt response to all inquiries within a remarkable 12-hour timeframe.
2. Industry-Leading Certifications: We proudly maintain prestigious certifications, including ISO 9001, CE, and SGS.
3. Cost-Effective Quality Assurance: Experience the perfect blend of competitive pricing and premium quality, as our products are sourced directly from our factory.
4. Impressive Production Capacity: Boasting a substantial monthly output of 20,000 tons, we guarantee efficient and seamless production.
5. Flexible Payment Options: We offer a variety of payment methods, including T/T and L/C, for your convenience.
6. Rapid Delivery & Standard Export Packaging: Anticipate swift delivery and packaging that adheres to international export standards.
7. Factory-Direct Pricing Advantage: Our in-house factory enables us to provide competitive pricing without sacrificing quality.
8. Comprehensive Third-Party Testing: We welcome any third-party testing to ensure the superior quality of our products.
9. Expert Team and Support: Our professional sales team and dedicated factory provide unwavering support.
10.Commitment to Customization: Your unique specifications are not just accepted-they're integral to our service. We are dedicated to fulfilling every customized request.
FAQ
Q1: What are your primary product offerings?
A1: We are a leading manufacturer and supplier of high-quality steel products, specializing in:Stainless Steel & Carbon Steel: Sheets/plates, coils, and pipes/tubes (both seamless and welded)Structural Components: Various bar profiles (round, square, hexagonal, flat, angle), C-channels, and H/I-beamsCustom Fabrications: Tailored solutions to meet specific project requirementsQ2: What quality assurance measures do you have in place?
A2: We maintain stringent quality control through:Comprehensive Mill Test Certificates provided with all shipmentsOptional third-party inspection services (SGS, BV, etc.)ISO-certified manufacturing processesRigorous in-house testing and quality checksQ3: What are your standard packaging terms?
A3: Our standard packaging includes:Bundled or coiled goods secured with steel rods/strapsCustom packaging solutions available per customer specificationsExport-grade packaging to ensure optimal protection during transitQ4: What is your typical delivery timeline?
A4: We offer flexible delivery options:Stock items: Ready for shipment within 3 business days after deposit confirmationMade-to-order items: Production typically completed within 7-15 working days post-depositExpedited options available for urgent requirementsQ5: What competitive advantages does your company offer?
A5: We differentiate ourselves through:A team of highly skilled professionals and technical expertsIndustry-leading pricing without compromising qualityUnparalleled after-sales support and customer serviceExtensive inventory and reliable supply chain managementQ6: Do you provide product samples?
A6: Yes, we're pleased to offer:Complimentary small samples from existing inventoryCustomer only responsible for shipping costsCustom samples available for specific project needsQ7: What are your payment terms?
A7: Our standard payment structure:30% advance payment via T/T to initiate production/orderRemaining 70% balance due prior to shipmentFull documentation including product photos and packaging details provided before final paymentWhy Choose Us?
√ Quality Assurance: Rigorous testing and certification
√Competitive Pricing: Cost-effective solutions without compromise
√ Reliable Delivery: On-time fulfillment guaranteed
√ Custom Solutions: Tailored to your exact specifications
√ Expert Support: Technical guidance at every stageFor further inquiries or specific requirements, please contact our sales team. We're committed to providing exceptional service and top-quality steel products for your projects.
Address:
1-1910 Fengbin Road, Liangxi District, Wuxi, Jiangsu, China
Business Type:
Manufacturer/Factory, Trading Company
Business Range:
Auto, Motorcycle Parts & Accessories, Chemicals, Construction & Decoration, Industrial Equipment & Components, Instruments & Meters, Manufacturing & Processing Machinery, Metallurgy, Mineral & Energy, Tools & Hardware
Management System Certification:
ISO 9001, ISO 9000, ISO 14001, ISO 14000, ISO 20000, OHSAS/ OHSMS 18001, IATF16949, HSE, ISO 14064, QC 080000, GMP, BSCI, BRC, SA 8000, QHSE, HACCP, BS 25999-2, ISO 13485, EICC, ANSI/ESD, SEDEX, ISO 22000, AIB, WRAP, GAP, ASME, ISO 29001, BREEAM, HQE, SHE Audits, IFS, QSR, ISO 50001, LEED, PAS 28000, FSC, ISO 10012, ISO 17025
Company Introduction:
WUXI TONGNO SPECIAL STEEL Co., Ltd is an Industry Group Company. It is a professional company in designing, producing and selling steel pipe, pipefittings and prefabricated house. We have our own big factories with modern machine line to make high quality products, which is mainly to be exported to oversea markets.
We have factories located in wuxi city, it was established in 1989. This factory is a leading seamless stainless steel pipe and pipefitting manufacturer in China. It occupied 114, 000 square meters, with fixed capital over 200 million and total amount 300 million. It owns 500 staffs including 80 advanced engineers. It owns perfect management system, vigorous technology supports, advanced production equipment and completed inspection equipment. The factory pay highly attention to enterprise foundation establishment, successfully was approved the authentication of PED and AD by TUV from German company, and the national special equipment license. Our products greatly provide for petroleum chemical, metallurgy, pharmaceutical machinery, paper making, food, shipbuilding, environmental protection, boiler, heater exchanger, pressure container, condensation, water, electricity and so on. The mainly grades we can provide are 304, 304L, 316, 316L, 321, 321H, 317L, 310S, 347H, 31803 etc.
At the same time, we also are the agency of Bao Steel, Hengyang, Tianjin, Anshan, Pangang etc. Big group steel company. We offer the seamless carbon, welded carbon steel pipe, GI pipe, and special pipe. Fittings elbow, tee, reducer, cap, lap joint, flanges etc...This is better for our customer to buy the different products from China, while they are saving their time, but they can enjoy in our best serves.
We have advanced technology of management, we win the trust because of our good quality.
We have clannish conscientious and passionate salesman, we gladden and steady the customers with our best service.
We are pure-hearted and awaiting for your kind attention to our company.