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Premium Stainless & Alloy Steel Pipes & Fittings

Wenzhou Kaixin Metal Co., Ltd – ISO9001 Certified Manufacturer. High-quality stainless steel, Monel, Hastelloy, and pipe fittings for global industrial applications.

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About Wenzhou Kaixin Metal Co., Ltd

Wenzhou Kaixin Metal Co., Ltd is located on the bank of the East China Sea, with a standard factory base. Just 8km from Wenzhou Airport and 18km from Wenzhou Railway Station, our strategic location ensures fast and efficient logistics.

Since inception, we have expanded our scale and expertise in producing stainless steel welded pipe, seamless pipe, sanitary pipe, shaped steel tubes, round steel, and pipe fittings. Our products are sold worldwide and are recognized and praised by customers for their durability and precision.

ISO9001:2008
Quality Certified
Global
Export Network
Factory and Pipes

Our Advantages

Modern Factory

State-of-the-art production and testing equipment, including 800-ton hydraulic molding machines.

Expert Team

Professional technical staff and dedicated service team with complete testing capabilities.

Quality Assurance

Strict implementation of national GB/T12771-2008 standard and ISO9001:2008 certification.

Global Reach

Products sell well at home and abroad, trusted by customers across industries.

Our Premium Products

304L Stainless Steel Pipe

304L Stainless Steel Pipe

Low-carbon variant of SS304, excellent for welding and corrosion resistance.

  • Standard: ASTM A312
  • Grade: SS 304L
  • Type: Seamless/Welded
Polished Stainless Pipe

Polished Stainless Pipe

High-gloss finish ideal for architectural, medical, and food-grade applications.

  • Finish: Mirror Polish (Ra ≤ 0.4μm)
  • Uses: Sanitary, Decorative
  • Standards: ASTM, DIN, JIS
Stainless Steel Rectangular Pipe

Stainless Steel Rectangular Pipe

Precision-formed rectangular tubes for structural and industrial use.

  • Shape: Rectangular
  • Material: SS304, SS316
  • Applications: Construction, Furniture
SS 304 Square Pipe

SS 304 Square Pipe

High-temperature resistant square tubing with excellent weldability.

  • Grade: ASTM A312 TP304
  • Shape: Square
  • Finish: 2B, BA, No.4
Hastelloy C22 Seamless Tube

Hastelloy C22 Seamless Tube

Nickel-chromium-molybdenum alloy with outstanding corrosion resistance.

  • Alloy: Hastelloy C-22
  • Type: Seamless
  • Standard: ASTM B622
Marine Grade Stainless Steel Pipe

Marine Grade Stainless Pipe

SS316/L grade pipes ideal for boat parts and offshore applications.

  • Grade: 316/L
  • Feature: Saltwater Resistant
  • Use: Marine, Offshore
Stainless Steel Oval Pipe

Stainless Steel Oval Pipe

Specialized oval-shaped stainless tubes for custom engineering needs.

  • Shape: Oval
  • Material: SS304, SS316
  • Custom: Available
Pipe Fittings

Pipe Fittings

Comprehensive range including elbows, tees, reducers, and flanges.

  • Standards: ASTM, DIN, JIS
  • Types: Welded, Threaded
  • Materials: SS, Alloy, Nickel

Why Choose KN-Tube?

ISO9001 Certified

We strictly follow ISO9001:2008 standards and national GB/T12771-2008 for consistent quality assurance.

Advanced Manufacturing

Equipped with 800-ton hydraulic molding machines and full testing facilities for precision production.

Global Exporter

Trusted by clients across Asia, Europe, North America, and the Middle East for reliable delivery and service.

15+
Years in Industry
50+
Countries Served
10,000+
Tons Annual Output
99.8%
Customer Satisfaction

Frequently Asked Questions

What materials do you manufacture?

We produce stainless steel (304, 304L, 316, 316L), alloy steel, nickel alloys, Monel, Hastelloy, and various pipe fittings in welded and seamless forms.

Are your products certified?

Yes, our company has passed ISO9001:2008 quality system certification and strictly implements national GB/T12771-2008 standards.

Can you provide custom sizes and shapes?

Yes, we offer custom manufacturing for oval, rectangular, square, and other shaped tubes based on customer specifications.

What are your main export markets?

Our products are exported to Southeast Asia, Europe, North America, the Middle East, and Australia.

What is the production lead time?

Typically 15-30 days depending on order size and customization. We provide updates throughout the production cycle.

Get in Touch

For inquiries, quotes, or technical support, visit the official KN-Tube website to connect with the Wenzhou Kaixin Metal team.

+8615968750098
info@kntube.com
No.3 East Lantian Area, Longwan District, Wenzhou City, China
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