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Seamless Pipes & Tubes

High-performance stainless steel seamless pipes, heat exchanger tubes, and precision tubing engineered for industrial, construction, and food processing applications. ISO9001, TUV, CE certified.

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About Zhejiang Senyu Stainless Steel Co., Ltd

With over a decade of experience in the stainless steel industry, Zhejiang Senyu Stainless Steel Co., Ltd is a trusted manufacturer of high-quality seamless and welded stainless steel pipes, tubes, and fittings. We specialize in precision-engineered solutions for demanding industrial environments.

Our mission is built on honesty, excellence, and mutual benefit. We serve global markets with products that meet ASTM, DIN, EN, JIS, and GOST standards, ensuring reliability and performance across sectors including energy, construction, food processing, and chemical engineering.

33+
Seamless Pipe Models
10+
Global Certifications
Stainless Steel Pipe Manufacturing

Our Product Range

Engineered for performance, durability, and precision. All products are manufactured under strict quality control and available in custom dimensions.

Stainless Steel Seamless Pipe

Stainless Steel Seamless Pipe

  • Grade: AISI 304, TP304L, TP316L
  • OD: 6mm – 610mm
  • WT: 1mm – 24mm
  • Standard: ASTM A312, GOST 9941
Best Seller
Polished Stainless Steel Tubing

Polished Stainless Steel Tubing

  • Grade: TP304/TP316L
  • Surface: 180#, 240#, 320# polished
  • Size: 12.7mm – 101.6mm
  • Application: Food, Sanitary, Decoration
Mirror Finish
Stainless Steel Square Pipe

Stainless Steel Square Pipe

  • Process: Plasma Welding, Cold Drawing
  • Size: 1/8'' – 16''
  • Surface: 2B or Polished
  • Use: Construction, Buildings
Structural Grade
Duplex Stainless Steel Pipe

Duplex Stainless Steel Pipe

  • Grade: 2205, 2507, S31803
  • Standard: ASTM A789, A790
  • Feature: High strength, corrosion resistance
  • Application: Fertilizer, Oil & Gas
High Strength
Heat Exchanger Tube

Stainless Steel Heat Exchanger Tube

  • Grade: TP304, TP316L, TP321
  • Standard: ASTM A213, GB/T13296
  • OD: 6mm – 101.6mm
  • Surface: AP (Annealed & Pickled)
High Pressure
Heavy Wall Seamless Pipe

Heavy Wall Seamless Pipe

  • Grade: TP304L, TP316L
  • Process: Cold Rolled, Cold Drawn
  • Application: High pressure vessels, boilers
  • Standard: ASTM A312, MTC EN10204.3.1
Industrial Grade
Small Diameter Tubing

Small Diameter Stainless Steel Tubing

  • Grade: TP304/304L/316L
  • Size: 1/8'' – 12''
  • Process: Cold Drawing, Polished
  • Standard: ASTM A269/A213
Precision Tubing
Stainless Steel U Bends

Stainless Steel U Bends

  • Grade: TP304/TP316L
  • Standard: ASTM A213
  • Feature: High temp & pressure resistance
  • Use: Heat exchangers, boilers
Custom Sizes
View All 100+ Products

Why Choose Senyu Steel?

✅

Certified Quality

ISO9001, TUV, CE, TS certified manufacturing. Full MTC EN10204.3.1 traceability for every batch.

🌍

Global Reach

Trusted by clients in over 50 countries. Multilingual support in English, Russian, Turkish, and Thai.

🔧

Custom Solutions

Custom lengths, diameters, finishes, and packaging. OEM/ODM services available.

10+
Years in Business
100+
Global Clients
300+
Product Variants
50+
Countries Served

Strict Quality Control

Every pipe and tube undergoes rigorous inspection at multiple stages: raw material verification, dimensional accuracy, mechanical testing, non-destructive testing (NDT), and final surface inspection.

  • ✔ 100% Eddy Current Testing
  • ✔ Hydrostatic & Pneumatic Testing
  • ✔ Chemical Composition Analysis
  • ✔ Tensile & Hardness Testing
  • ✔ Full Traceability with MTC
Quality Control Lab

What Our Clients Say

"Good price, good quality, good service. Let us win a good market!"

— Mr. Umar Fizta

"You always ship container in time, your quality never let us down. I'd like to do business with you."

— Mr. Scott Jones

"Nice factory, nice to meet all of you, kind and professional sales person. Looking forward to meeting you in my country next time."

— Dipika Sanghvi

"To our 10 years relationship, strengthen Senyu brand, let us win the best market together!!!"

— AZAR

Get in Touch

For inquiries, quotes, or technical support, visit our official website to connect with our sales team.

Visit Official Website

We respond to all inquiries within 24 hours. Multilingual support available.

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