Xi'an Dongmeng Group Co., Ltd. is one of the most reliable manufacturers and suppliers of large diameter stainless steel pipe in China, also supports customized service. With abundant experience, we warmly welcome you to wholesale cheap products in stock here and get free sample from our factory. For price consultation, contact us.
Large diameter stainless steel pipe is a heavy-duty industrial piping solution designed for transporting fluids, gases, and corrosive media in large-scale engineering systems.
These pipes are widely used in oil and gas transmission, chemical processing plants, power generation facilities, offshore platforms, desalination plants, and infrastructure projects where high flow capacity and corrosion resistance are required.
Manufactured in both welded and seamless types, large diameter stainless steel pipes are available in grades such as 304, 304L, 316, 316L, 321, and 347, meeting international standards including ASTM, ASME, and EN specifications.
Compared with standard stainless steel pipes, large diameter pipes offer higher flow efficiency, reduced pressure loss, and improved system performance for industrial-scale applications.
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High Quality
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Advanced Equipment
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Professional Team
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Custom Service
What is Large Diameter Stainless Steel Pipe?
Large diameter stainless steel pipe refers to industrial pipes typically above DN350 (14 inches), designed for high-capacity fluid transport and heavy-duty structural applications.
These pipes are commonly used where standard pipe sizes cannot meet flow, pressure, or engineering requirements
Types of Large Diameter Stainless Steel Pipe
Welded Stainless Steel Pipe
EFW (Electric Fusion Welded)
ERW (Electric Resistance Welded)
Spiral Welded Pipe
Straight Seam Welded Pipe
Seamless Stainless Steel Pipe
High pressure resistance
Critical industrial applications
Premium cost grade
Sizes & Dimensions
Outer Diameter: 14" – 120"+
DN Range: DN350 – DN3000+
Wall Thickness: SCH 5S – SCH XXS
Length: 6m / 12m / Custom
End Types: Beveled / Plain / Flanged
Standards & Compliance
ASME SA312
EN 10217-7
JIS G3459
Why Large Diameter Stainless Steel Pipe?
High flow capacity for industrial systems
Excellent corrosion resistance in harsh environments
Suitable for high temperature and pressure conditions
Reduced maintenance cost
Long service life (20–50 years design life)
Custom fabrication for EPC projects
Global Supply & Export Markets
Our large diameter stainless steel pipes are widely exported to:
United States
Canada
Mexico
UAE
Saudi Arabia
Vietnam
Malaysia
Australia
South Africa
Turkey
Welded vs Seamless Stainless Steel Pipe
| Type | Cost | Strength | Application |
|---|---|---|---|
| Welded Pipe | Lower | Medium | Large diameter systems |
| Seamless Pipe | Higher | High | High-pressure systems |
FAQ
What is large diameter stainless steel pipe?
It refers to stainless steel piping systems above DN350 used for high-capacity industrial fluid transport.
What is the standard size of large diameter stainless steel pipe?
Typically ranges from 14 inches to over 120 inches in outer diameter.
What is the difference between welded and seamless large diameter pipe?
Welded pipes are cost-effective for large sizes, while seamless pipes are used for high-pressure applications.
What industries use large diameter stainless steel pipe?
Oil & gas, chemical processing, power generation, marine engineering, and water treatment industries.
Which stainless steel grade is best?
316L is widely used due to its excellent corrosion resistance and durability.
Inspection & Quality Assurance
All large diameter stainless steel pipes are tested under strict quality control systems:
Ultrasonic Testing (UT)
Radiographic Testing (RT)
Hydrostatic Testing
PMI Material Testing
Dimensional Inspection
Weld Seam Quality Inspection
Third-party inspection available (SGS, BV, TUV).
What is considered a large diameter stainless steel pipe?
A large diameter stainless steel pipe is an industrial piping product with an outer diameter typically above 14 inches (DN350), designed for high-capacity fluid transport in oil, gas, chemical, and infrastructure systems. It is commonly manufactured in welded or seamless forms using stainless steel grades such as 304, 316L, 321, and 347.
What are large diameter stainless steel pipes used for?
They are widely used in oil and gas pipelines, chemical processing plants, power generation systems, desalination plants, marine engineering, and large-scale industrial infrastructure
How to Choose Large Diameter Stainless Steel Pipe
When selecting large diameter stainless steel pipe, consider the following factors:
1. Application Environment
Corrosive media → 316L / 904L
High temperature → 321 / 347
General industrial → 304 / 304L
2. Pressure Requirements
High pressure → Seamless pipe
Medium/low pressure → Welded pipe
3. Pipe Size Requirements
Flow capacity
System design diameter
Project engineering standards
4. Cost Efficiency
Welded pipe = lower cost
Seamless pipe = higher performance
Technical Performance Table
| Property | Value |
|---|---|
| Density | 7.93 g/cm³ |
| Melting Point | 1400–1450°C |
| Tensile Strength | ≥ 515 MPa (304) |
| Yield Strength | ≥ 205 MPa |
| Corrosion Resistance | Excellent |
| Weldability | Excellent |
Contact Us
Get a Quote for Large Diameter Stainless Steel Pipe
Looking for a reliable supplier of large diameter stainless steel pipes for your project?
We provide factory-direct supply, customized manufacturing, and global export service for EPC contractors, distributors, and industrial buyers.
Phone / WhatsApp / WeChat
+86 15769214734
Email
office@dongmjd.com
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