API N80 Oil casing
We supply API 5CT-certified oil country tubular goods (OCTG) designed to meet the stringent demands of downhole environments. Manufactured to precise chemical, mechanical, and dimensional specifications, our casing and tubing pipes deliver consistent performance in corrosive, high-pressure, and high-temperature oil and gas well applications.
+86 19163584547
+86 19163584547
+86 19163584547
info@hds-steels.com
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Product Description

碳钢 拷贝


  • Grade-Specific Performance: Includes J55, K55, N80, L80, P110, and higher grades with tailored yield strengths and toughness

  • Enhanced Downhole Durability: Optimized for resistance to sulfide stress cracking (SSC), CO₂ corrosion, and wear

  • Precision Threading: Available with API and premium connections to ensure sealing integrity and running performance

  • Full Traceability: Each batch supported by mill test reports, chemical analysis, and mechanical testing per API 5CT

Ideal for surface, intermediate, and production casing; tubing strings; and specialized well completions. We offer threading, coupling, heat treatment, and non-destructive testing with documentation compliant with API, ISO, and customer-specific requirements.



StandardAPI 5CT, GB, ISO11960, GOST
MaterialH40, J55, K55, N80-1, N80-Q, L80-1,L80-9Cr, L80-13Cr, P110, Q125 etc.
Outside Dia(mm)114.3MM -508MM(4 1/2"--20")
Wall Thickness(mm)5.21MM-16.13MM(9.5PPF--133PPF)
LengthR1, R2, R3
Thread TypesSTC, LTC, BTC, XC and Premium connection
InspectionNDT and other related rules specified in API 5CT and 5B
PackagingLoose package, Packaged in bundles(3Ton Max) , bundled pipes with two slings at the both end for easy loading and discharging, End
with Plastic caps or as per requirement
Application1. Fluid pipe
2. Power Plant
3. Structure pipe
4. High and low pressure Boiler tube
5. Seamless pipe /tube for petroleum cracking
6. Conduit pipe
7. Scaffolding pipe pharmaceutical andship,building etc.
Payment30% T/T deposit in advance, 70% T/T balance within 5 days after B/L copy or 70%T/T balance, 100% Irrevocable L/C at sight, 100%
Irrevocable L/C after receive B/L in 15 days
Advantages1. Reasonable price with excellent quality
2. Abundant stock and prompt delivery
3. Rich supply and export experience, sincere service

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Product Show

详情标题1-产品详情1


Our petroleum pipelines are manufactured from high-grade carbon and micro-alloyed steels, delivering exceptional yield strength and collapse resistance. Through precision wall thickness control and full-length quench & tempering treatment, the pipes achieve uniform mechanical properties with superior resistance to sulfide stress cracking (NACE MR0175 compliant). Our product range covers casing, tubing, and line pipes with various threading types and anti-corrosion coatings (FBE/3LPE). All products strictly comply with API 5CT/5L, ISO 11960 and customer-specific standards, ensuring reliability in drilling, extraction and transmission applications.


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详情标题1-产品详情2


Our oil pipelines are produced using state-of-the-art JCOE forming technology and submerged arc welding (SAW) processes. The manufacturing process features automated ultrasonic testing systems, full-length X-ray inspection, and computer-controlled hydrostatic testing up to 30 MPa. Additionally, the production line includes in-line heat treatment for stress relief and precision end-facing equipment, ensuring strict dimensional tolerances (OD ±0.5%, WT ±5%) are consistently met.


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详情标题1-产品详情3


In order to ensure product quality, we will arrange professional personnel to check product quality, packaging, weight, hardness, etc., according to customer requirements of product specifications, looking for high-quality and cheap cooperative factories in China, to provide customers with one-stop procurement services and quality assurance.


3石油管-检验 拷贝



详情标题1-产品详情4


Excellent packaging: waterproof paper and plastic film + iron cover + at least three strapping straps + strapping straps fixed on iron or wood pallets can effectively protect products from corrosion and various climate changes during transportation. Generally speaking, we ship from Shanghai, Tianjin, Qingdao and Ningbo ports. We have worked with many experienced shipping companies for a long time to find the most suitable mode of transportation for you.


4石油管-包装运输 拷贝

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