Introduction to Spiral Steel Pipe Manufacturing

Spiral steel pipes, also known as spiral welded pipes or SSAW (Spiral Submerged Arc Welded) pipes, are widely used in oil & gas pipelines, water transmission, piling, construction, and industrial applications. The spiral welding process allows for large-diameter, high-strength, and cost-effective pipe production, making it a preferred choice for long-distance transportation of fluids and structural applications.

Why Choose Spiral Steel Pipes?

✔ Manufactured with advanced spiral submerged arc welding (SSAW) technology
✔ Compliant with API 5L, ASTM A252, GB/T9711, and EN standards
✔ Available in large diameters (219mm – 3658mm) and wall thicknesses (6mm – 40mm)
✔ Cost-effective alternative to seamless and ERW pipes
✔ High corrosion resistance with various coatings (3LPE, FBE, galvanized, etc.)

This guide covers the complete spiral steel pipe manufacturing process, quality control measures, applications, pricing trends, and how to choose the best manufacturer.

Spiral Steel Pipe Manufacturing Process

Step-by-Step Manufacturing Process of Spiral Steel Pipes

Chinese factories follow strict quality control measures to ensure high-performance spiral welded pipes. Below is a step-by-step breakdown of the manufacturing process:

1. Raw Material Selection

• High-quality steel coils (API 5L, ASTM A252, GB/T9711) are selected from certified steel mills.
• The steel undergoes chemical composition and mechanical property testing to meet project specifications.

2. Steel Strip Preparation

• The steel coil is uncoiled and leveled to ensure uniform thickness.
• Edge preparation is performed to remove impurities and ensure a strong weld.

3. Spiral Forming Process

• The steel strip is fed into a forming machine and shaped into a spiral.
• The edges are aligned precisely to prepare for welding.

4. Spiral Submerged Arc Welding (SSAW)

• Inside and outside welding is performed using submerged arc welding technology.
• Automatic welding ensures full penetration and high-strength weld seams.

5. Ultrasonic & X-Ray Testing (NDT – Non-Destructive Testing)

• Ultrasonic Testing (UT) – Detects internal defects in the weld seam.
• Radiographic Testing (X-ray) – Ensures 100% weld quality for critical applications.
• Magnetic Particle Testing (MT) – Identifies surface cracks and imperfections.

6. Hydrostatic Testing

• Each pipe undergoes high-pressure hydrostatic testing to check for leaks or structural weaknesses.

7. Surface Preparation & Coating Application

• Pipes are cleaned using sandblasting or shot blasting to remove rust and contaminants.
• Protective coatings (FBE, 3LPE, 3LPP, Coal Tar Epoxy) are applied for corrosion resistance.

8. Final Inspection & Packaging

• Pipes are measured, marked, labeled, and bundled for shipment.
• Each pipe is tagged with batch numbers, steel grade, and production details for traceability.

Quality Control in Spiral Steel Pipe Manufacturing

How Do Manufacturers Ensure Quality?

✔ Strict adherence to API 5L, ASTM A252, GB/T9711, and ISO standards
✔ 100% weld seam inspection using ultrasonic and X-ray testing
✔ Hydrostatic pressure testing to ensure no leaks
✔ Surface inspection to detect any visual defects
✔ Coating adhesion testing to ensure long-term corrosion resistance

Why Choose a Certified Manufacturer?

✔ Ensures compliance with international standards
✔ Reduces risk of defects, leaks, and failures
✔ Guarantees long-term durability and reliability

Cangzhou Spiral Steel Pipes Group follows strict quality control measures to ensure high-quality spiral steel pipes for global projects.

Applications of Spiral Steel Pipes

Where Are Spiral Steel Pipes Used?

Industry	Application	Why Spiral Steel Pipes?
Oil & Gas Pipelines	Crude oil, natural gas, offshore pipelines	High-pressure resistance and long-distance transmission
Water Transmission	Municipal water supply, wastewater pipelines	Leak-proof, corrosion-resistant, and cost-effective
Industrial Pipelines	Power plants, chemical processing, and refineries	Handles high pressures and corrosive environments
Construction & Structural	Piling, bridge foundations, structural supports	High strength and load-bearing capacity
Marine & Offshore	Coastal water transmission, offshore oil rigs	Resistant to seawater and extreme marine conditions

Cangzhou Spiral Steel Pipes Group is a trusted supplier for oil & gas, water transmission, construction, and industrial projects globally.

Spiral Steel Pipe Price Trends in 2025

The price of spiral steel pipes depends on factors such as pipe diameter, wall thickness, steel grade, and coating type. Below is an estimated pricing chart for 2025:

Wall Thickness (mm)	Steel Grade	Price Per Ton (USD)
6 – 10 mm	API 5L X42 – X65	600−600 – 600−900
12 – 18 mm	API 5L X65 – X70	850−850 – 850−1,200
20 – 40 mm	API 5L X70 – X80	1,100−1,100 – 1,100−1,500

Factors Affecting Price:

✔ Steel Grade: Higher grades (X70, X80) cost more.
✔ Coating Type: FBE, 3LPE, and PP coatings add extra cost.
✔ Order Quantity: Bulk orders receive better pricing.

Cangzhou Spiral Steel Pipes Group offers high-quality spiral steel pipes at competitive prices.

China Spiral Steel Pipe: Coating & Anti-Corrosion Treatments

What Are the Best Coating Options for Spiral Steel Pipes?

To enhance corrosion resistance and mechanical durability, Chinese manufacturers offer various protective coatings suitable for different environments. Below is a detailed comparison of the most commonly used coatings:

Coating Type	Best For	Corrosion Resistance	Temperature Resistance	Advantages
Fusion Bonded Epoxy (FBE)	Water pipelines, oil & gas	High	Up to 85°C	Strong adhesion, smooth surface, high chemical resistance
3-Layer Polyethylene (3LPE)	Underground pipelines, oil & gas	Very High	Up to 85°C	Excellent corrosion protection, long service life
3-Layer Polypropylene (3LPP)	Offshore pipelines, high-temperature applications	Very High	Up to 140°C	High resistance to impact, excellent mechanical strength
Coal Tar Epoxy (CTE)	Buried pipelines, marine environments	Very High	Up to 100°C	Effective in high-moisture environments, cost-effective
Galvanized Coating	Structural applications, fencing	Moderate	Up to 60°C	Affordable, durable, suitable for general-purpose use

How to Choose the Right Coating?

✔ For underground pipelines → Choose 3LPE or 3LPP.
✔ For offshore applications → 3LPP or Coal Tar Epoxy is best.
✔ For industrial water pipelines → FBE provides excellent protection.

Cangzhou Spiral Steel Pipes Group provides customized coating solutions based on project requirements.

How to Choose the Best China Spiral Steel Pipe Manufacturer?

Selecting the right manufacturer is crucial for project success, cost-effectiveness, and long-term durability. Here are the key factors to consider when choosing a China Spiral Steel Pipe manufacturer:

1. Quality Standards & Certifications

• Look for manufacturers that comply with API 5L, ASTM A252, GB/T9711, and ISO standards.
• Ensure they have quality certifications (ISO 9001, API 5L, CE, etc.).

2. Production Capacity & Experience

• Choose a manufacturer with large-scale production capabilities for bulk orders.
• Experience matters – manufacturers like Cangzhou Spiral Steel Pipes Group have 27+ years of expertise.

3. Customization & Coating Options

• Ensure the manufacturer offers custom pipe sizes, wall thicknesses, and coatings.
• Ask about Fusion Bonded Epoxy (FBE), 3LPE, 3LPP, and Coal Tar Epoxy coatings.

4. Competitive Pricing & Payment Terms

• Compare pricing among top manufacturers to get the best deal.
• Look for flexible payment options, bulk order discounts, and shipping terms.

5. Delivery Time & Logistics

• Choose manufacturers with fast production and global shipping capabilities.
• Ensure they provide proper packaging, documentation, and export services.

FAQ:

Question	Answer
What is the difference between SSAW and ERW pipes?	SSAW (spiral welded pipes) are made using a continuous spiral welding process, while ERW pipes are made with longitudinal electric resistance welding. SSAW pipes are better for large-diameter applications.
What industries use spiral steel pipes?	Oil & gas, water transmission, construction, piling, and industrial applications.
Can spiral steel pipes be custom-made?	Yes, manufacturers offer custom sizes, wall thicknesses, and coatings.
What coatings are available for spiral steel pipes?	3LPE, 3LPP, FBE, Coal Tar Epoxy, and Galvanized coatings.
How long does it take to manufacture and ship?	Production time varies (typically 15-45 days), with global shipping options available.
Which is the best manufacturer in China for spiral steel pipes?	Cangzhou Spiral Steel Pipes Group Co., Ltd is a trusted manufacturer with 27+ years of experience.

Final Thoughts

For premium-quality China Spiral Welded Steel Pipes, Cangzhou Spiral Steel Pipes Group Co., Ltd is your best choice in 2025!

Need a quote or more technical details? Contact Cangzhou Spiral Steel Pipes Group today!