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Seamless Pipes & Tubes

ZHEJIANG CHANGFENG NEW MATERIALS CO., LTD. – PED 97/23/EC Approved Supplier & Exporter of Industrial Raw Materials. Trusted provider of complete piping solutions for Oil & Gas, Petrochemical, and Power industries.

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Industrial Piping Solutions

Complete range of high-standard seamless and welded pipes for critical applications.

PED 97/23/EC Certified

Compliant with European Pressure Equipment Directive for safety and reliability.

Global Exporter

Serving clients across Asia, Europe, Middle East, and North America.

About ZHEJIANG CHANGFENG

ZHEJIANG CHANGFENG NEW MATERIALS CO., LTD. is a professional manufacturer and exporter specializing in stainless steel seamless pipes, welded pipes, seamless tubes, alloy steel seamless pipes, and stainless steel bars.

With advanced production equipment and a strict quality control system, we ensure every product meets international standards such as ASTM, ASME, ISO, and GOST. Our factory is PED 97/23/EC approved, guaranteeing compliance with European safety regulations.

We are committed to providing high-quality industrial raw materials and complete piping solutions to the Oil & Gas, chemical, power generation, and shipbuilding industries worldwide.

PED 97/23/EC Certified ISO 9001:2015 GOST Certified ASTM Standards

Established: 2003

Location: Zhejiang, China

Our Product Range

High-performance stainless steel and alloy pipes engineered for durability, corrosion resistance, and extreme conditions.

Thick Wall Stainless Steel Seamless Pipes

High-pressure resistance for oil & gas, petrochemical, and boiler applications.

Standard: ASTM A312, ASME SA312
Grade: TP304/L, TP316/L, TP321, TP347
OD: 6.0mm – 630mm
Wall: Up to 80mm

ASTM A312 TP316L Seamless Pipes

Excellent corrosion resistance, ideal for marine and chemical environments.

Standard: ASTM A312 / ASME SA312
Grade: SUS316L, TP316L
Schedule: SCH10, SCH20, SCH40, SCH80
Surface: Pickled, Bright Annealed

Seamless Stainless Steel Pipes

Precision-engineered for high-temperature and high-pressure systems.

Type: Seamless (Hot Finished / Cold Drawn)
Grades: 304, 304L, 316, 316L, 321, 347
Length: 5.8m, 6m, or as required
Application: Heat exchangers, boilers

Stainless Steel Welded Pipes

Cost-effective solution for medium-pressure applications with excellent weldability.

Standard: ASTM A312, A778
Grades: 304, 304L, 316, 316L
OD: 10.3mm – 1219mm
Wall: 0.8mm – 25.4mm

Alloy Steel Seamless Pipes

Designed for high-temperature service in power plants and refineries.

Standard: ASTM A335, ASME SA335
Grades: P1, P5, P9, P11, P22, P91
Application: Superheaters, boilers
Heat Treatment: Normalized & Tempered

Austenitic Stainless Steel Pipes

Non-magnetic, highly ductile, and excellent corrosion resistance.

Structure: Face-Centered Cubic (FCC)
Grades: 304, 316, 321, 347, 904L
Key Feature: Cryogenic toughness
Uses: Chemical, food, pharmaceutical

ASTM B167 UNS N06600 Seamless Pipe

Nickel-chromium alloy with outstanding resistance to high-temperature oxidation.

Standard: ASTM B167, ASME SB167
Alloy: Inconel 600
Applications: Furnace components, heat treatment
Temp Resistance: Up to 2000°F

Stainless Steel Bar

High-strength round, hex, and square bars for machining and structural use.

Standards: ASTM A276, A484
Grades: 304, 304L, 316, 316L, 410, 420
Diameter: 5mm – 500mm
Finish: Hot Rolled, Cold Drawn, Turned

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Our Quality Commitment

Every product undergoes rigorous testing and inspection to ensure compliance with international standards.

Certifications & Standards

PED 97/23/EC Approved

European Pressure Equipment Directive compliance for safe operation under pressure.

ISO 9001:2015 Certified

Quality Management System ensuring consistent product excellence.

GOST Certified

Approved for use in Russian and CIS markets.

ASTM & ASME Standards

Full adherence to American Society for Testing and Materials specifications.

Advanced Quality Control Process

Material Testing

Chemical composition analysis, mechanical property testing, and hardness checks.

Dimensional Inspection

Precise measurement of OD, ID, wall thickness, and straightness.

NDT Testing

Eddy current, ultrasonic, hydrostatic, and X-ray inspection.

Latest News

Mar 29, 2019

Sincerely Invite You to Visit Our Booth

We Changfeng New Materials will treasure every opportunity to meet with our valued customer. Sincerely invite you and your company representatives to visit our booth.

Apr 09, 2019

Conventional Standards of Pipes & Tubes

Overview of international standards including ASTM, ASME, ISO, DIN, JIS, and GOST for seamless and welded pipes.

Mar 27, 2019

About Austenitic Stainless Steel

Stainless steels classified by crystalline structure. Austenitic types offer excellent formability and corrosion resistance.

Get in Touch

For inquiries, quotes, or technical support, please reach out through the official website.

Visit Official Website to Contact

We respond to all inquiries promptly through our official communication channels.

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