Overview of Q355B Spiral Weld Pipe

Q355B Spiral Weld Pipe is a high-strength, low-alloy structural steel pipe widely used in infrastructure, bridge construction, piling, and oil & gas transportation. Manufactured using submerged arc welding (SAW) in a spiral formation, this pipe ensures excellent durability, flexibility, and mechanical performance.

Key Features of Q355B Spiral Weld Pipe

✔ Made from Q355B steel, known for high strength and impact resistance
✔ Spiral welding process enhances structural integrity
✔ Ideal for heavy-load applications like bridges, piling, and oil & gas pipelines
✔ Available in large diameters and various thicknesses
✔ Can be coated for corrosion resistance in harsh environments
✔ Complies with GB/T9711, API 5L, ASTM A252, and other international standards

This guide will cover everything about Q355B Spiral Weld Pipes, including manufacturing processes, specifications, applications, price trends, and suppliers.

Top Q355B Spiral Weld Pipe Manufacturers in 2025

Selecting a trusted manufacturer ensures high-quality materials, precision welding, and compliance with global standards. Below are some of the leading Q355B Spiral Weld Pipe manufacturers:

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 Q355B spiral welded pipes
✔ Custom coatings: 3LPE, FBE, and Epoxy Coal Tar

2. Baosteel Group (China)

A leading steel producer specializing in high-strength Q355B spiral welded pipes for various applications.

3. Tianjin Steel Pipe Co. (China)

A major supplier of Q355B spiral welded pipes for construction, piling, and pipeline projects.

4. Jindal SAW Ltd (India)

Provides high-performance Q355B spiral pipes for infrastructure development and industrial applications.

5. Nippon Steel (Japan)

A global leader in high-strength, corrosion-resistant spiral welded pipes for marine, oil & gas, and structural uses.

Each of these manufacturers ensures strict compliance with industry standards, guaranteeing high durability and performance.

Q355B Spiral Weld Pipe vs Other Steel Pipes

Selecting the right pipe type depends on application, cost, and durability. Below is a comparison between Q355B Spiral Weld Pipe and other steel pipes:

الميزة	Q355B Spiral Weld Pipe	Q235B Spiral Weld Pipe	أنابيب الصلب غير الملحومة	أنابيب الصلب LSAW
عملية التصنيع	Submerged Arc Welding (SAW)	Submerged Arc Welding (SAW)	No welding (extruded from billets)	Longitudinal Submerged Arc Welding (LSAW)
القوة	Higher than Q235B	Medium	Very High	Very High
Tensile Strength (MPa)	470-630	375-500	550+	550+
Diameter Range	Medium to Large	Medium to Large	Small to Medium	Medium to Large
Wall Thickness	Medium to Thick	Medium to Thick	Thin to Medium	Medium to Thick
التكلفة	Higher than Q235B	Cost-effective	باهظة الثمن	Higher than Spiral Weld
Best Use Case	Bridges, piling, oil & gas, structural	Water transmission, general construction	High-pressure pipelines, precision applications	Oil & gas pipelines, pressure applications

Why Choose Q355B Spiral Weld Pipe?

✔ Higher strength and impact resistance than Q235B
✔ Best for heavy-load applications like bridges, deep foundations, and marine piling
✔ Complies with GB/T9711, API 5L, and ASTM A252 standards
✔ Available in large diameters and customizable thicknesses

Q355B Spiral Weld Pipe Price Per Ton in 2025

The price of Q355B Spiral Weld Pipes varies based on factors such as pipe diameter, wall thickness, steel grade, and coatings. Below is an estimated pricing chart for 2025:

قطر الأنبوب (مم)	سُمك الجدار (مم)	Steel Grade	سعر الطن (بالدولار الأمريكي)
219 – 600	6 – 10	Q355B	1,100−1,100 – 1,100−1,700
610 – 1200	8 – 14	Q355B	1,600−1,600 – 1,600−2,300
1220 – 1800	10 – 18	Q355B	2,200−2,200 – 2,200−3,000
2000 – 3500	12 – 25	Q355B	2,900−2,900 – 2,900−4,200

العوامل المؤثرة في السعر:

✔ Pipe Diameter & Wall Thickness – Larger and thicker pipes require more material.
✔ نوع الطلاء – 3LPE, FBE, and other coatings increase costs.
✔ Bulk Orders – Large quantity orders receive better pricing.

Cangzhou Spiral Steel Pipes Group offers high-quality Q355B Spiral Weld Pipes at competitive prices.

Q355B Spiral Weld Pipe Manufacturing Process & Quality Control

How Are Q355B Spiral Weld Pipes Manufactured?

The manufacturing process of Q355B Spiral Weld Pipes is designed to ensure high durability, strength, and precision. Below is a step-by-step breakdown of how these pipes are produced:

1. Raw Material Selection

• High-quality Q355B hot-rolled steel coils are selected based on GB/T9711, API 5L, or ASTM A252 standards.
• The steel undergoes chemical composition analysis to ensure uniform mechanical properties such as yield strength and tensile strength.

2. Pipe Forming & Spiral Welding

• The steel plate is formed into a spiral shape using specialized rolling machines.
• The edges are submerged arc welded (SAW) to create a continuous, high-strength weld seam.
• The welding process ensures full penetration and defect-free welds.

3. Heat Treatment & Strength Testing

• Pipes undergo heat treatment to improve tensile strength and load-bearing capacity.
• Each pipe is tested for bending strength, impact resistance, and structural integrity.

4. Hydrostatic Pressure Testing

• Each pipe undergoes high-pressure water testing to verify leak-proof and structural performance.

5. 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 used based on pipe grade and project requirements.

6. Beveling & Cutting

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

7. Coating & Anti-Corrosion Treatment

• Pipes can be coated with 3LPE, FBE, Epoxy Coal Tar, or Polyurethane coatings to enhance corrosion resistance.

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 Q355B Spiral Weld Pipes Are Preferred?

✔ Designed for structural, bridge construction, and oil & gas applications
✔ Manufactured with advanced welding and heat treatment processes
✔ High resistance to bending, compression, and environmental exposure
✔ Custom coatings available to extend lifespan in marine and underground conditions

شركة مجموعة تشانغتشو للأنابيب الفولاذية الحلزونية المحدودة follows strict quality control procedures to ensure high-performance Q355B Spiral Weld Pipes.

Q355B Spiral Weld Pipe Applications & Industry Uses

Where Are Q355B Spiral Weld Pipes Used?

Q355B Spiral Weld Pipes are widely used in construction, infrastructure, and oil & gas projects that require high-strength, durable pipes.

Industry	التطبيق	Why Q355B Spiral Weld Pipe?
Bridge Construction	Bridge supports, deck supports	High-strength, impact-resistant, and long-lasting
Structural Applications	Building columns, crane booms	Excellent load-bearing capacity and durability
Oil & Gas Transportation	Crude oil, natural gas, and fuel pipelines	Complies with API 5L standards for high-pressure transport
Pile Foundations	Deep foundation support for bridges and buildings	High load-bearing capacity and seismic resistance
Marine & Offshore	Subsea pipelines, offshore drilling platforms	Resistant to seawater and extreme marine conditions

Why Q355B Spiral Weld Pipes Are Ideal for Structural & Bridge Construction Projects?

✔ High resistance to corrosion and environmental exposure
✔ Available in long lengths for pipeline and foundation applications
✔ Can be coated with 3LPE or Epoxy Coal Tar for extended durability

Cangzhou Spiral Steel Pipes Group supplies customized Q355B Spiral Weld Pipes for bridge construction, structural applications, oil & gas transmission, and deep foundation piling.

Q355B Spiral Weld Pipe Coating & Anti-Corrosion Treatment

To ensure long-lasting performance, Q355B Spiral Weld Pipes can be coated with various anti-corrosion treatments.

نوع الطلاء	مقاومة التآكل	Best Applications
3LPE Coating	Very High	Water pipelines, oil & gas transport
FBE (Fusion Bonded Epoxy) Coating	High	Underground pipelines, structural applications
Epoxy Coal Tar Coating	Excellent	Industrial pipelines & marine piling
طلاء البولي يوريثان	High	Offshore drilling & marine structures

Why Coating is Essential for Q355B Spiral Weld Pipes?

✔ Prevents rust and corrosion in marine and underground environments
✔ Reduces maintenance costs and extends service life
✔ Enhances resistance against chemicals, seawater, and extreme temperatures

Cangzhou Spiral Steel Pipes Group provides custom coating services to meet industry-specific requirements.

Q355B Spiral Weld Pipe Suppliers & Exporters

If you are looking to import Q355B Spiral Weld Pipes, working with a reliable supplier ensures quality, competitive pricing, and timely delivery.

Top Chinese Exporters of Q355B Spiral Weld Pipes

Company Name	الموقع	Annual Production Capacity
شركة مجموعة تشانغتشو للأنابيب الفولاذية الحلزونية المحدودة	Hebei, China	400,000 طن
مجموعة باوستيل	Shanghai, China	500,000+ tons
Tianjin Steel Pipe Co.	Tianjin, China	300,000 طن

Why Choose Cangzhou Spiral Steel Pipes Group for Q355B Spiral Weld Pipes?

✔ 27 years of experience in steel pipe manufacturing
✔ ISO 9001, API 5L, and ASTM-certified products
✔ 13 production lines, covering diameters from 219mm to 3500mm
✔ Custom coatings and anti-corrosion treatments available
✔ Strong export network to North America, Europe, and Asia

For high-quality Q355B Spiral Weld Pipes, شركة مجموعة تشانغتشو للأنابيب الفولاذية الحلزونية المحدودة is a trusted supplier.

FAQ:

سؤال	الإجابة
What is Q355B Spiral Weld Pipe used for?	Used for bridge construction, piling, oil & gas pipelines, and structural applications.
How does Q355B compare to Q235B?	Q355B has higher strength, toughness, and impact resistance than Q235B.
What is the lifespan of a Q355B Spiral Weld Pipe?	50-100 years, depending on coating and environmental exposure.
Who is the best supplier?	شركة مجموعة تشانغتشو للأنابيب الفولاذية الحلزونية المحدودة is a leading supplier with ISO & API-certified products.
What is the price per ton in 2025?	Prices range from 1,100to1,100 to 1,100to4,200 per ton, depending on size and steel grade.
Can Q355B Spiral Weld Pipes be used for high-pressure applications?	Yes, its high strength makes it suitable for high-pressure and heavy-load applications.
What coatings are available for Q355B Spiral Weld Pipes?	3LPE, FBE, Epoxy Coal Tar, and Polyurethane coatings.
Are Q355B Spiral Weld Pipes suitable for offshore use?	Yes, with proper anti-corrosion coating, they are widely used in marine projects.

Final Thoughts

Q355B Spiral Weld Pipes are essential for bridge construction, piling, oil & gas pipelines, and structural applications. They offer higher strength and durability than Q235B, making them ideal for heavy-load projects.

For premium quality Q355B Spiral Weld Pipes, شركة مجموعة تشانغتشو للأنابيب الفولاذية الحلزونية المحدودة is your best choice in 2025! 🚀

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