Tubing, oil casing, seamless steel pipe

28/02/2026

Cangzhou Zhongshun Steel Pipe Trade Co., Ltd.
Professional industry and trade integrated supplier & exporter of oil pipes, oil casing pipes, alloy steel pipes from China.
We focus on stable quality, large stock, fast delivery and full-service export for global customers.
Our main products:
Oil pipes
Oil casing pipes (OCTG)
Alloy steel pipes
Seamless steel pipes
Precision steel pipes
Markets: Middle East, Southeast Asia, Europe, Americas
We provide professional packaging, complete export documents, and reliable logistics support.
Welcome bulk orders, long-term cooperation and global distributors.
casing steel pipe, manufacturer Zhongshun Steel Pipe
pipe steel pipe steel pipe and trade integration direct East Asia

04/01/2026

**【China Made, Drilling Deeper】Tubing & Casing: Your Standard Solutions & Customized Answers**

In the quest for energy deep within the earth, you need the most reliable partner. China-made tubing and casing provide the core support for global energy development with top-tier craftsmanship and flexible service.

**1. Standard Products: The Solid Foundation**
We offer a comprehensive range of API-standard products, ensuring immediate availability, reliability, and efficiency.
* **Main Standards:** Strictly compliant with API 5CT, API 5DP, and other international specifications.
* **Core Materials:** Steel grades including J55, K55, N80, L80, P110, meeting various strength and corrosion resistance needs.
* **Common Specifications:**
* **O.D. Range:** Tubing: 2-3/8″ to 4-1/2″; Casing: 4-1/2″ to 13-3/8″ and above.
* **Wall Thickness:** Diverse options for different well depths and pressures.
* **Length:** Standard ranges: R1 (4.88-7.62m), R2 (7.62-10.36m), R3 (≥10.36m).
* **Advantages:** **Stable quality, fast delivery, excellent cost-effectiveness**—the economical choice for conventional field development.

**2. Customization: The Key to Extreme Challenges**
For ultra-deep, high-pressure, high-corrosion (e.g., sour service) environments, we provide end-to-end customized engineering solutions.
* **Material Upgrade:** **High-alloy steels (e.g., L80-13Cr, Super Duplex), high-toughness, and specially heat-treated materials** for harsh conditions.
* **Special Specifications:** Production of **non-standard O.D./wall thickness, special thread connections (e.g., premium gas-tight threads)**.
* **Length Optimization:** Custom long-length threads or near-transport-limit lengths to reduce downhole connections and enhance wellbore integrity.

**3. Why Choose Us?**
* **Dual-Mode "Standard + Custom":** Capable of large-scale standard supply and powerful R&D for flexible custom production.
* **Full-Cycle Technical Support:** Professional service from geological data analysis to product selection and after-sales support.

**We don't just supply steel pipes; we deliver secure pathways to subsurface energy.** Whether for standard needs or unique challenges, China Manufacturing delivers trustworthy answers.

**Contact Us for Your Project:**
**Email:** [email protected]
**Phone/WhatsApp:** +86 1890 3179 061

** **

31/12/2025

31/12/2025

# L80 13Cr Steel Pipe Product Introduction

# # Product Overview
The L80 13Cr stainless steel tubing is specifically developed for moderately corrosive oil and gas environments, particularly suitable for service conditions containing CO₂. This product complies with the API 5CT standard and achieves an optimal balance between corrosion resistance and economic efficiency, serving as an ideal alternative to traditional carbon steel and higher-grade alloy materials.

# # Key Features
- **Excellent CO₂ Corrosion Resistance**: Performs exceptionally well in environments with CO₂ partial pressures up to 1-2 bar.
- **Good Mechanical Properties**: Yield strength of 80-95 ksi, meeting the requirements of most downhole operations.
- **Moderate High-Temperature Resistance**: Suitable for well conditions with temperatures not exceeding 250°C.
- **Cost-Effective**: More economical compared to duplex stainless steels and nickel-based alloys.

# # Typical Applications
- CO₂ flooding wells and natural gas wells
- Production tubing and casing in oil and gas wells containing moderate concentrations of CO₂
- Tubing and casing in corrosive environments
- Long-term production wells under marginal corrosive conditions

# # Technical Specifications
- **Material**: 13% Chromium Martensitic Stainless Steel
- **Hardness**: ≤23 HRC
- **Heat Treatment**: Quenched and Tempered
- **Connection Types**: Various API and premium threading options available
- **Size Range**: Outer diameter from 2-3/8" to 7", meeting the requirements of most wellbores

# # Quality Control
- Strictly manufactured in accordance with API 5CT standards
- Comprehensive non-destructive testing (ultrasonic, electromagnetic inspection)
- Complete traceability system
- Compliant with ISO 9001 Quality Management System

# # Service Environment Limitations
- Not suitable for environments with high concentrations of H₂S (recommended limit: ≤0.3 psi partial pressure)
- Chloride concentration should be kept within reasonable limits
- Extreme acidic pH conditions should be avoided

# # Why Choose Our L80 13Cr?
With over 20 years of experience in specialty steel pipe manufacturing, we provide comprehensive services ranging from material selection and product manufacturing to on-site support. Our L80 13Cr products have been successfully applied in oil and gas fields worldwide, demonstrating significant effectiveness in extending equipment lifespan and reducing maintenance costs.

**Obtain Customized Solutions**: Our technical team can provide material selection advice and technical support based on your specific well conditions.

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*This product complies with API 5CT and related international standards. Please consult our technical engineers to evaluate suitability before specific application.*

05/12/2025

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18/11/2025

27/10/2025

What's the foundation of your toughest projects? 🏗️
For countless clients worldwide, it's the reliability of our steel pipes and tubing, supported by a complete ecosystem of pipe fittings. Think seamless pipes for high-pressure applications, structural pipes for framework, and all the necessary flanges, unions, and valves to complete your system.
At [Your Company Name], we offer a trustworthy one-stop solution. Get standard or custom-made products, all backed by our commitment to quality and fair pricing.
Comment below with your industry, and we'll tell you how our pipes can help!

21/10/2025

China's Seamless Steel Pipes: Built Strong. Priced Smart. 🚀

Looking for reliability without the high cost?

Our seamless steel pipes offer the perfect balance:
✅ Top-tier quality for demanding projects.
✅ Factory-direct pricing for better value.

Get the durability you need and the price you want.

👉 Tap "Learn More" for a direct quote!

28/09/2025

True seamless steel pipe: 73*5.51/88.9*6.45
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28/08/2025

304 Stainless Steel Honed Tube, Cylinder Tube, Stainless Steel Cylinder Barrel Steel Honed Tube Tube
E-mail:[email protected]
WhatsApp: +86 189 0317 9061