Overview of DIN 30678 Polypropylene Coated Spiral Weld Pipe

The DIN 30678 Polypropylene (PP) Coated Spiral Weld Pipe is a premium-grade steel pipe used in oil & gas pipelines, water transmission, industrial piping, offshore projects, and buried pipeline applications. The polypropylene (PP) coating provides exceptional corrosion resistance, UV resistance, and mechanical strength, making it ideal for high-temperature environments, aggressive soil conditions, and subsea applications.

Key Features of DIN 30678 Polypropylene Coated Spiral Weld Pipe

✔ Spiral Submerged Arc Welded (SSAW) steel pipe
✔ DIN 30678-compliant polypropylene (PP) coating
✔ Superior resistance to high temperatures and mechanical damage
✔ Available in diameters from 6 inches to 144 inches (150mm to 3658mm)
✔ Complies with DIN 30678, API 5L, ASTM A252, and GB/T9711 standards
✔ Ideal for offshore applications, oil & gas pipelines, and industrial projects

This guide will cover manufacturing processes, applications, price trends, suppliers, and quality standards for DIN 30678 Polypropylene Coated Spiral Weld Pipes.

Top DIN 30678 Polypropylene Coated Spiral Weld Pipe Manufacturers in 2025

Selecting a reliable manufacturer ensures high-quality materials, precise coating applications, and compliance with DIN 30678 standards. Below are some of the leading manufacturers of DIN 30678 Polypropylene Coated Spiral Weld Pipes:

1. Cangzhou Spiral Steel Pipes Group Co., Ltd

✔ 27 years of experience in steel pipe manufacturing
✔ 13 production lines for Φ219–Φ3500mm spiral welded pipes
✔ Annual production capacity: 400,000 tons
✔ ISO 9001, API 5L, ASTM-certified DIN 30678 Polypropylene Coated Pipes
✔ Custom coatings for offshore, oil & gas, and industrial pipelines

2. EUROPIPE (Germany)

A leading European manufacturer of large-diameter spiral welded pipes, specializing in DIN 30678 coatings for high-temperature applications.

3. Jindal SAW Ltd (India)

Provides high-performance spiral pipes with DIN 30678 polypropylene coatings for industrial, offshore, and oil & gas applications.

4. Nippon Steel (Japan)

A global leader in high-strength, corrosion-resistant spiral welded pipes for marine, subsea, and industrial projects.

5. Tenaris (Italy)

Manufactures premium-quality spiral welded pipes with DIN 30678 polypropylene coatings for high-pressure and offshore pipeline projects.

Each of these manufacturers ensures strict compliance with DIN 30678 standards, guaranteeing high durability and corrosion resistance.

DIN 30678 Polypropylene Coated Pipe vs Other Coated Spiral Weld Pipes

Choosing the right coating type depends on project requirements, cost, and durability. Below is a comparison between DIN 30678 Polypropylene Coated Spiral Weld Pipe and other coated pipes:

Feature	DIN 30678 Polypropylene Coated Pipe	DIN 30670 PE Coated Pipe	AWWA C214 3LPE Coated Pipe
Coating Type	Polypropylene (PP)	Polyethylene (PE)	Three-layer Polyethylene (3LPE)
Corrosion Resistance	Very High	High	Very High
Mechanical Protection	Very High	High	Very High
Best Use Case	Offshore, high-temperature pipelines	Underground pipelines, oil & gas transmission	High-pressure and subsea applications
Lifespan	50+ years	50+ years	50+ years
Temperature Resistance	Up to 140°C	Up to 85°C	Up to 85°C
Cost	Higher	Moderate	Higher

Why Choose DIN 30678 Polypropylene Coated Spiral Weld Pipe?

✔ Outstanding resistance to high temperatures and chemical exposure
✔ Long-lasting protection in aggressive soil and offshore environments
✔ Ideal for deep-sea, high-pressure, and industrial applications

DIN 30678 Spiral Weld Pipe Price Per Ton in 2025

The price of DIN 30678 Polypropylene Coated Spiral Weld Pipes varies based on factors such as pipe diameter, wall thickness, steel grade, and coating thickness. Below is an estimated pricing chart for 2025:

Wall Thickness (mm)	Steel Grade	Price Per Ton (USD)
6 – 10 mm	API 5L X42 – X65	5,500−5,500 – 5,500−7,500
12 – 18 mm	API 5L X65 – X70	6,800−6,800 – 6,800−8,800
20 – 40 mm	API 5L X70 – X80	8,000−8,000 – 8,000−11,000

Factors Affecting Price:

✔ Pipe Diameter & Wall Thickness – Larger and thicker pipes require more material.
✔ Coating Type – Polypropylene coating thickness impacts cost.
✔ Bulk Orders – Large quantity orders receive better pricing.

Cangzhou Spiral Steel Pipes Group offers high-quality DIN 30678 Polypropylene Coated Spiral Weld Pipes at competitive prices.

DIN 30678 Polypropylene Coated Spiral Weld Pipe Manufacturing Process & Quality Control

How Are DIN 30678 Polypropylene Coated Spiral Weld Pipes Manufactured?

The manufacturing process of DIN 30678 Polypropylene Coated Spiral Weld Pipes follows strict DIN, API 5L, ASTM A252, and GB/T9711 standards to ensure high durability, corrosion resistance, and mechanical protection. Below is a step-by-step breakdown of the production process:

1. Raw Material Selection

• High-quality steel coils (API 5L, ASTM A252, GB/T9711) are carefully selected to meet chemical and mechanical composition requirements.
• The steel undergoes chemical and mechanical testing to verify yield strength, tensile strength, and impact resistance.

2. Pipe Forming & Spiral Welding

• The steel plates are rolled into a spiral shape using advanced forming machines.
• The edges are submerged arc welded (SAW) using double-sided automatic welding to ensure defect-free, high-strength weld seams.
• This welding method ensures full penetration and structural stability, making it ideal for offshore, oil & gas, and industrial applications.

3. Hydrostatic Pressure Testing

• Each pipe undergoes high-pressure hydrostatic testing to verify leak-proof and structural reliability.

4. Ultrasonic & Radiographic Testing

• Non-destructive testing (NDT) is performed to detect internal or external defects in the weld seam.
• Ultrasonic, X-ray, and magnetic particle testing are conducted based on pipe grade and project requirements.

5. Surface Preparation

• The pipe surface is thoroughly cleaned by sandblasting or shot blasting to remove rust, scale, and contaminants.
• Proper surface preparation ensures better adhesion of the polypropylene coating.

6. Polypropylene (PP) Coating Application (DIN 30678)

• Preheating: The pipe is preheated to the required temperature to ensure proper adhesion of the polypropylene.
• Primer Application: A fusion bonded epoxy (FBE) primer layer is applied to enhance the bond between the steel surface and the polypropylene.
• Polypropylene Layer Application:
  • A thick layer of polypropylene coating is applied using extrusion or spray-coating methods.
  • The coating is evenly distributed to provide full surface coverage.
  • The thickness is controlled based on project specifications.
• Curing Process: The coated pipe is heated to a specific temperature to allow the polypropylene to cure and harden, forming a highly protective layer.

7. Beveling & Cutting

• Pipes are cut into required lengths using automated machinery.
• The pipe ends are beveled for easy welding and connection.

8. Final Inspection & Packaging

• Pipes are marked, inspected, and bundled according to customer requirements.
• Each pipe is labeled with batch numbers, specifications, and manufacturer details for full traceability.

Why DIN 30678 Polypropylene Coated Spiral Weld Pipes Are Preferred?

✔ Designed for high-pressure offshore and oil & gas pipeline systems
✔ Manufactured with advanced welding and coating processes
✔ High resistance to corrosion, abrasion, and environmental stress
✔ Long-lasting protection in buried and subsea environments

Cangzhou Spiral Steel Pipes Group Co., Ltd follows strict quality control procedures to ensure high-performance DIN 30678 Polypropylene Coated Spiral Weld Pipes.

DIN 30678 Polypropylene Coated Spiral Weld Pipe Applications & Industry Uses

Where Are DIN 30678 Polypropylene Coated Spiral Weld Pipes Used?

DIN 30678 Polypropylene Coated Spiral Weld Pipes are widely used in offshore pipelines, oil & gas transmission, industrial projects, and marine environments.

Industry	Application	Why DIN 30678 Spiral Weld Pipe?
Offshore Pipelines	Subsea oil & gas pipelines, deepwater transmission	High temperature and corrosion resistance
Water Transmission	Municipal water supply, potable water pipelines	Leak-proof, corrosion-resistant, and long service life
Industrial Pipelines	Power plants, chemical processing, and desalination plants	Handles high pressures and corrosive environments
Oil & Gas	Crude oil, natural gas transmission pipelines	Superior chemical resistance and long lifespan
Marine & Coastal	Coastal water transmission systems, offshore desalination plants	Resistant to seawater and extreme marine conditions

Why DIN 30678 Spiral Weld Pipes Are Ideal for Offshore & High-Temperature Applications?

✔ High resistance to chemical corrosion and environmental exposure
✔ Available in large diameters for deep-sea and industrial projects
✔ Cost-effective solution for long-distance transmission pipelines

Cangzhou Spiral Steel Pipes Group supplies customized DIN 30678 Polypropylene Coated Spiral Weld Pipes for offshore oil & gas, industrial pipelines, water transmission, and marine projects.

Final Thoughts

For high-quality DIN 30678 Polypropylene Coated Spiral Weld 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!