Overview
Made via one-piece hot piercing forming, this pipe has zero welded seams across the whole tube. It holds steady mechanical strength, performs well in cold environments, and can be welded easily on site. It stands up to high internal pressure and mild corrosion, suited for continuous service in complicated energy and industrial pipeline sites. Every pipe goes through controlled heat treatment and surface finishing after rolling. All batches complete mandatory hydrostatic pressure checks and ultrasonic scanning. This thorough testing locks in uniform quality and prevents leakage risks for all fluid transport jobs.
Pipe Specifications
We tailor sizes of this API 5L X65 seamless pipe to match all kinds of engineering installation rules.
Outer diameters run from 21.3mm up to 1219mm, paired with wall thickness between 2.5mm and 100mm to cover all project needs.
Stock lengths are 6m, 9m and 12m. We can also cut tubes to custom exact lengths as buyers request for their projects.
We supply plain, beveled or threaded pipe ends, and fit plastic caps on each pipe to shield edges from scratches and dents.
All measurements stick to tolerance limits laid out in API 5L, so pipes fit together perfectly during field assembly.
Key Product Features
Integral Seamless Structure
Built with one-piece seamless forming technology without any welds. This solid structure removes leakage and cracking risks, guaranteeing high structural integrity and long-term operational safety.
Precise & Smooth Pipe Surface
Features uniform wall thickness and smooth inner and outer surfaces. It lowers fluid transmission resistance, avoids medium buildup and pipe blockage, and ensures steady, efficient pipeline operation.
Superior Environmental Adaptability
Retains stable mechanical strength and rigidity under high-pressure, low-temperature and mildly corrosive conditions. It delivers excellent fatigue resistance for long-duration, uninterrupted pipeline service.
Excellent Construction Adaptability
Boasts great processing performance and supports common on-site operations like cutting, bending and welding, fitting various engineering installation needs and boosting construction efficiency.
Chemical Composition (Mass Fraction, %)
API 5L X65 seamless pipe adopts standardized low-carbon steel formulation with strictly controlled trace elements, which ensures pure material texture, stable structure and excellent comprehensive performance. The standard chemical composition is shown in the table below:
|
Element |
Standard Content (%) |
|---|---|
|
Carbon (C) |
≤0.28 |
|
Manganese (Mn) |
1.15 – 1.40 |
|
Phosphorus (P) |
≤0.030 |
|
Sulfur (S) |
≤0.030 |
|
Silicon (Si) |
0.15 – 0.35 |
Mechanical Properties
After precise heat treatment, API 5L X65 seamless pipe delivers stable and qualified mechanical properties, adapting to long-term high-pressure and low-temperature service conditions. Core mechanical performance parameters comply with official API 5L standards, as detailed below:
|
Mechanical Property |
Standard Value |
|---|---|
|
Yield Strength |
448 MPa (65 ksi) Min |
|
Tensile Strength |
586 – 758 MPa |
|
Elongation |
≥18% |
|
Low-temperature Impact Toughness |
Qualified for -29℃ standard test |
Applications
Boasting great pressure resistance, solid structural stability and strong environmental adaptability, this pipe fits well in various high-standard industrial projects. It is most commonly used for onshore and offshore oil and gas transportation, perfectly suited for long-distance delivery of crude oil, natural gas and coalbed methane. It works reliably even in low-temperature and sour service environments.
Outside the energy industry, this pipe is also widely adopted for chemical fluid conveyance, municipal gas pipeline systems, thermal power projects and industrial pressure piping systems. Its robust build lowers daily maintenance needs, prolongs overall pipeline service life, and effectively helps clients reduce operational costs while improving overall project safety.
Business Scope
Jiangsu Cunrui Metal Products Co., Ltd. develops, manufactures and exports premium seamless steel tubes and steel profiles. Our main product lineup includes standard and custom high-strength line pipes, industrial seamless pipes and matching pipe fittings.
We welcome bulk orders, custom machining, trial sample purchases and long-term OEM & ODM partnerships. Our steel goods ship to Southeast Asia, the Middle East, Europe, Africa and more international markets, earning consistent trust from engineering firms, energy operators and industrial manufacturers worldwide.
We offer full one-stop service covering product inquiries, technical size matching, on-site factory visits, official test certificates and ongoing after-sales technical guidance.
Quality Assurance & Why Choose Us
Every batch of our API 5L X65 seamless pipe follows API 5L and ISO standards closely. We run full checks at every production stage: chemical composition tests, mechanical performance tests, hydrostatic pressure tests and ultrasonic flaw detection to guarantee each pipe passes international safety rules.
At Jiangsu Cunrui Metal Products Co., Ltd., we stick to standardized manufacturing and tight quality control. We only use qualified raw steel and strictly eliminate flawed semi-finished goods, supplying consistent, long-lasting, dimensionally accurate pipes for global energy and industrial pipeline jobs.
We offer custom sizes, quick lead times, full official test certificates and all-round after-sales support. No matter standard stock orders or special project customizations, we deliver stable, budget-friendly piping solutions. Feel free to reach out for specs, factory tours or long-term partnership talks.
