cnstainlesstube.com | Stainless Steel & Nickel Alloy Tubes | Heat Exchanger, Seamless, Coiled Tubing

About Zhejiang Max Stainless Steel Co., Ltd.

Established in 2005, Zhejiang Max Stainless Steel Co., Ltd. is a modern enterprise integrating scientific research, production, and sales. We specialize in stainless steel, nickel alloy, and duplex steel piping systems, serving industries such as oil & gas, chemical processing, power generation, and marine engineering.

Our mission is to provide safe, reliable, and high-quality steel pipes and fittings that meet international standards. We use premium base materials from Walsin Lihwa and Yongxing Special Steel to ensure consistent performance and durability.

Advanced cold-drawing and cold-rolling production lines

CNC machining centers for precision components

Custom design and engineering support

Our Product Range

High-performance tubing and fittings engineered for extreme environments. All products are manufactured under strict quality control to meet ASTM, ASME, and other international standards.

Incoloy 825 Downhole Tubing

Corrosion-resistant alloy tubing ideal for hydraulic control lines in oil & gas downhole applications.

• ASTM B163 / ASME SB163
• Seamless construction
• High resistance to pitting and crevice corrosion

ASTM A213 TP304 Seamless Boiler Tube

High-temperature boiler tubing with excellent oxidation resistance and creep strength.

• ASTM A213 / ASME SA213
• Bright annealed finish
• Used in power plants and industrial boilers

Seamless Heat Exchanger Tube

Precision-engineered tubes for shell and tube heat exchangers in chemical and petrochemical industries.

• ASTM A213 / A269
• Cold drawn or cold rolled
• Available in U-bent and straight configurations

Inconel 718 Heat Exchanger Tube

High-strength nickel-chromium alloy tube for high-pressure, high-temperature heat transfer systems.

• ASTM B167 / ASME SB167
• Excellent fatigue and creep resistance
• Aerospace and gas turbine applications

Stainless Steel Bright Annealed Tube

High-purity, oxide-free surface finish ideal for instrumentation, pharmaceutical, and food processing lines.

• ASTM A270 / A269
• Electropolished or mechanical polish
• Low surface roughness for clean flow

Monel 400 B163 Pipe

Nickel-copper alloy pipe with outstanding resistance to seawater and acidic environments.

• ASTM B163 / ASME SB163
• Marine and offshore applications
• Resistant to chloride stress corrosion

Stainless Steel U-Bent Tube

Pre-bent heat exchanger tubes for easy installation in shell and tube heat exchangers.

• Custom bend radii available
• Seamless or welded construction
• TP304, TP316L, and duplex grades

Super Duplex Steel Tube

High-strength duplex stainless steel with superior corrosion resistance in aggressive environments.

• UNS S32750 / S32760
• High chloride resistance
• Oil & gas, desalination, and chemical plants

Hastelloy C276 Fittings

Hastelloy C276 Pipe Fittings

Corrosion-resistant alloy fittings for high-performance piping systems in extreme conditions.

• ASME B16.9 / B16.28
• Buttweld, elbows, tees, reducers
• Resistant to oxidizing and reducing acids

View Full Product Catalog

Why Choose CNSTainlessTube?

We combine advanced manufacturing, rigorous quality control, and customer-focused service to deliver reliable piping solutions.

Quality Assurance

Every product undergoes rigorous testing including hydrostatic, eddy current, and dimensional inspection.

Fast Delivery

Efficient production and logistics network ensures on-time delivery across the globe.

Custom Solutions

We offer tailored designs, sizes, and materials to meet your specific engineering requirements.

Global Support

Dedicated service team available in multiple languages to support your projects worldwide.

Frequently Asked Questions

Everything you need to know about our products and services.

What materials do you manufacture?

We produce stainless steel (304, 316L, 321, etc.), duplex/super duplex (2205, 2507), nickel alloys (Inconel 625, 718, Incoloy 825, Monel 400, Hastelloy C276), and carbon steel tubes and fittings.

What standards do your products comply with?

Our products meet ASTM, ASME, DIN, JIS, and GB standards, including ASTM A213, A269, A312, B163, B167, and ASME B16.9, B16.28.

Can you provide custom sizes and specifications?

Yes, we offer full customization including outer diameter, wall thickness, length, end finish, packaging, and special testing requirements.

What is your production capacity?

We operate multiple cold-drawing and cold-rolling lines with a combined annual capacity exceeding 10,000 metric tons.

Do you offer U-bent or coiled tubing?

Yes, we manufacture both U-bent heat exchanger tubes and stainless steel coiled tubing in various alloys and dimensions.

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