01
Austenitic Stainless Steel Pipe
Grade Family
304
304L
304H
310S
310H
316
316L
316H
316Ti
317L
321
321H
347
347H
Established 1985 / 40+ Years / Global Manufacturer
About Xintongda Special Steel Seamless Pipe and Tube Manufacturer
Zhejiang Xintongda Special Steel Manufacturing Co., Ltd. is a professional manufacturer of seamless stainless steel pipe, duplex stainless steel pipe, super duplex pipe, and nickel alloy pipe based in Zhejiang Province, China.
Engineering-Grade Manufacturer
Engineering-Grade Seamless Tubes and Pipes Manufacturer
With over 40 years of manufacturing experience (was built in 1985), XTD supplies corrosion-resistant seamless pipes for oil & gas, petrochemical, offshore, LNG and power generation industries worldwide.
40+
Years of
Engineering
Expertise
Engineering
Expertise
Seamless Pipe Product Range
A complete range of seamless pipe & tube products
We manufacture a wide range of seamless pipe and tube products, including:
02
Super Austenitic Stainless Steel Pipe
Grade Family
904L
S30815 (253MA)
S31254 (254SMO)
S32654 (654SMO)
03
Duplex & Super Duplex Stainless Steel Pipe
Grade Family
UNS S31803
UNS S32205 (Duplex 2205)
UNS S32750 (Super Duplex 2507)
UNS S32760
UNS S32550
04
Nickel Alloy Pipe
Grade Family
UNS N08800 (Incoloy 800)
UNS N08810 (800H)
UNS N08825 (825)
UNS N06600 (600)
UNS N06625 (625)
UNS N04400 (Monel 400)
Alloy C276
Alloy C22
Alloy B2
Custom sizes and cut-to-length services are available according to project requirements.
Manufacturing Capability
Manufacturing Capability of Seamless Pipes
XTD operates a complete seamless pipe production system including:
STEP 01
Piercing
STEP 02
Cold Drawing
& Cold Rolling
& Cold Rolling
STEP 03
Bright Annealing
Heat Treatment
Heat Treatment
STEP 04
Straightening
& Finishing
& Finishing
Production Lines
With more than 20 cold drawing and cold rolling production lines, our annual production capacity reaches approximately 25,000 tons.
In-Stock Grades
We maintain regular stock of common grades such as 304L, 316L, 2205, 2507, 904L, 254SMO, 625 and C276 to ensure fast delivery for international customers.
OD Range
6 mm — 1016 mm
Annual Capacity
25,000 tons
Large Diameter Production
Large Diameter Seamless Pipe Production (Up to 1016 mm)
Our subsidiary, Fujian Tengqi Pipe Tech Co., Ltd., specializes in large diameter seamless stainless steel pipe production. This facility supports offshore and project-based requirements for heavy wall and large OD seamless pipes.
International-Standard Manufacturing Facilities
Our seamless pipes are manufactured in accordance with:
All products are supplied with EN 10204 3.1 certification. 3.2 certification is available upon request.
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Manufacturing Standards 13 standards
ASTM A312
ASTM A213
ASTM A269
ASTM A789
ASTM A790
ASTM B622
ASTM B163
ASTM B167
ASTM B444
EN 10216-5
GB/T 21833
GB/T 13296
GB/T 14976
Certifications Include 13 accreditations
PED
AD 2000
ISO 9001
ISO 14001
ISO 45001
ABS
BV
CCS
DNV
LR
NORSOK M650
EAC (CU-TR)
GOST
Industries We Serve
Applications of Stainless Steel & Nickel Alloy Seamless Pipes
Our seamless stainless steel pipe, duplex pipe and nickel alloy pipe products are widely used in:
Oil and Gas
Offshore Platforms
Petrochemical Plants
LNG Facilities
Desalination Systems
Power Generation
Globally Recognized Approvals
Certifications Include
Our manufacturing operations are accredited and verified by leading international certification bodies, ensuring compliance with the most stringent quality, safety, and environmental standards.
PED
AD 2000
ISO 9001
ISO 14001
ISO 45001
ABS
BV
CCS
DNV
LR
NORSOK M650
EAC (CU-TR)
GOST
Quality is at the core of our operations, and integrity guides every cooperation. Our objective is to build long-term global partnerships by delivering reliable seamless pipe solutions in austenitic stainless steel, duplex stainless steel, and nickel alloys for corrosion- and pressure-critical applications.