Seamless Pipes and Tubes Manufacturer
Engineering-Grade Seamless Tubes and Pipes for Corrosion & Pressure Critical Applications.
Austenitic | Duplex | Super Duplex | Nickel Alloy
High Performance Stainless Steel /Duplex Steel and Nickel Alloy Pipes and Tubes
 
Manufacturer compliant with EN & ASTM …. standards with full traceability
 
Experience of Stainless Steel Filed
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Global Expertise
Professional Team
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About Us

Leveraging 40 years of expertise to deliver reliable, bespoke solutions

Zhejiang Xintongda Special Steel Manufacturing Co., Ltd. is an engineering-grade seamless tubes and pipes manufacturer for corrosion and pressure-critical applications, covering Austenitic, Duplex, Super Duplex, and Nickel Alloy grades. Located in Songyang, Zhejiang Province, China, the company has been serving industries since 1985.
  • Qualified Manufacturer of Stainless Steel Seamless Pipes and Tubes
  • Specializing in high-performance stainless steel, duplex steel, and nickel alloy pipes and tubes for demanding industrial applications.
  • Certified by internationally recognized authorities, including ABS, BV, CCS, DNV, LR, NORSOK M650, EAC (CU-TR), PED, AD2000, and ISO 9001 / 14001 / 45001.
40+Years of Experience
Factory
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Our Products

Our Seamless Pipe & Tube Products

Seamless Stainless Steel Pipe

Seamless Stainless Steel Pipe

Seamless stainless steel pipe is a high-integrity tubular product manufactured from a solid stainless steel billet through hot rolling, cold rolling, cold drawing processes, without any welding joints.
Seamless Stainless Steel Tube

Seamless Stainless Steel Tube

Seamless stainless steel tubes are widely used in high-pressure piping systems, heat exchanger applications, petrochemical processing plants, offshore platforms, and power generation facilities where structural reliability and corrosion resistance are critical to operational safety.
Duplex Steel Seamless Pipe

Duplex Steel Seamless Pipe

Seamless duplex steel pipe is a high-strength stainless steel pipe manufactured with a balanced dual-phase microstructure consisting of approximately 50% austenite and 50% ferrite.
Duplex Steel Seamless Tube

Duplex Steel Seamless Tube

Duplex Stainless Steel Seamless Tubes (such as S31803 / S32205) offer a dual-phase microstructure designed for extreme environments. These pressure-rated tubes provide excellent resistance to stress corrosion cracking (SCC) and high mechanical strength.
Seamless Nickel Alloy Steel Pipe

Seamless Nickel Alloy Steel Pipe

Seamless Nickel Alloy Pipes such as Inconel 625, Monel 400 & Alloy C276 deliver high tensile strength and excellent resistance to sulfuric acid and chloride stress corrosion. Designed for demanding industries, they ensure durable, Leak-proof transport of volatile, corrosive fluids.
Seamless Nickel Alloy Steel Tube

Seamless Nickel Alloy Steel Tube

Engineered for extreme sour service (H₂S), volatile organic compounds (VOCs), and corrosive acids, our tubing solutions (including Incoloy,Inconel,Monel,and Hastelloy) deliver unmatched resistance to Sulfide Stress Cracking (SSC) and high-temperature oxidation.
Grades & Materials

Varieties of Materials

With strategically integrated production facilities, Xintongda Special Steel efficiently serves domestic and international markets with high-performance stainless steel, duplex, super duplex, nickel alloy, Monel, and Inconel pipes and tubes engineered for critical industrial applications.
Accredited by globally recognized certification bodies and strictly compliant with international standards across all processes.
ABS
BV Certificate
LR Certificate
ISO 9001 - 2015
GOST
DNV
TUV

The Oil and Gas Industry: Integrated Solutions Across Upstream, Midstream, and Downstream

The oil and gas value chain has three sectors: Upstream (exploration and production of oil and gas), Midstream (transportation and storage via pipelines and terminals), and Downstream (refining and processing into products like gasoline, lubricants, and petrochemicals).

What Our Clients Say

Frequently Asked Questions

  • What is the price per kilogram, meter, or foot?
    The price of pipes and tubes depends on the size and material grade. We can quote prices per kilogram (KG), per ton, or per meter, based on your requirement.
  • Do you offer ex-stock material or only made-to-order products?
    We offer both ex-stock and made-to-order options. We maintain stock in various sizes and grades, and we also support customized orders.
  • How do you handle international shipping and customs documentation?
    We manage international shipping professionally and provide complete documentation, including Bill of Lading (BOL), Packing List (PL), Commercial Invoice (CI), Certificate of Origin (CO), Insurance documents, and EN 10204 3.1 MTC.
  • What certifications does your company hold?
    We are certified under ISO 9001, ISO 45001, ISO 14001, PED AD2000, BV, NORSOK M-650, LR, DNV, ABS, and EAC GOST, among others.
Our Latest Blogs

Expert guides for grades, standards, industrial applications, and much more.

contact us

Let’s Work Together

Call Us +86-577-88877003
Email Us info@xtd-ss.com
Opening Hours Mon - Fri: 09am - 07pm
Location No. 209 Ruiyang Road, Xiping Street, Songyang County, Lishui City, Zhejiang Province Zip Code: 323400
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Our News & Events

Keep yourself connected with our growth, global presence, and industry achievements.

ABS Logo

Zintongda Achieves 2026 ABS Assessment

March 2026

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SS World

Stainless Steel World Asia Singapore

14th - 15th Oct 2026

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Tube Shanghai

Tube Shanghai 2026

21st - 24th Sep 2026

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Tube India

Tube India 2026

30th Nov – 2nd Dec 2026

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Dusseldorf

Wire and Tube Dusseldorf 2026

13th – 17th April 2026

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ONS Norway

Zhejiang XTD at ONS 2026 Norway

Nov, 14, 2025

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