Industrial stainless steel welded pipes are widely used in petroleum, chemical processing, natural gas, water treatment, food processing, pharmaceutical engineering, and structural applications. Due to their excellent corrosion resistance, smooth surface finish, and cost-effective production process, stainless steel welded pipes have become an essential material in modern industrial systems.
At Union Steel Industry, industrial stainless steel welded pipes are supplied according to ASTM, ASME, API, DIN, GB, and JIS standards to meet global engineering requirements.
What Is Industrial Stainless Steel Welded Pipe?
Industrial stainless steel welded pipe is manufactured by forming stainless steel coil or plate into a tubular shape and welding the seam through automatic welding processes.
Industrial Stainless Steel Welded Pipe Standards
According to the specification sheet, the main implementation standards include:
ASTM A312
ASTM A358
ASTM A789
ASTM A790
ASTM A928
API 5LC / 5LD
DIN 17471
HG 20537
GB/T21832.2
SY/T6601
Common Stainless Steel Grades
The image specification lists several commonly used stainless steel grades:
|
Grade
|
Material Type
|
Main Features
|
|
304
|
Austenitic Stainless Steel
|
General corrosion resistance
|
|
304L
|
Low Carbon Stainless Steel
|
Better weldability
|
|
316L
|
Molybdenum Stainless Steel
|
Improved chloride resistance
|
|
310S
|
Heat Resistant Stainless Steel
|
High-temperature resistance
|
|
2205
|
Duplex Stainless Steel
|
High strength and corrosion resistance
|
|
TiGr.2
|
Titanium Alloy
|
Excellent seawater resistance
|
|
B10
|
Copper-Nickel Alloy
|
Marine and desalination applications
|
ASME B36.10 / B36.19 Stainless Steel Pipe Size Table
The following specification table summarizes the industrial stainless steel welded pipe dimensions shown in the image.
Stainless Steel Pipe Dimension Table
|
DN
|
NPS
|
Outside Diameter (mm)
|
SCH 5S
|
SCH 10S
|
SCH 40S
|
SCH 80S
|
|
6
|
1/8
|
10.3
|
—
|
1.24
|
1.73
|
2.41
|
|
8
|
1/4
|
13.7
|
—
|
1.65
|
2.24
|
3.02
|
|
10
|
3/8
|
17.1
|
—
|
1.65
|
2.31
|
3.20
|
|
15
|
1/2
|
21.3
|
1.65
|
2.11
|
2.77
|
3.73
|
|
20
|
3/4
|
26.7
|
1.65
|
2.11
|
2.87
|
3.91
|
|
25
|
1
|
33.4
|
1.65
|
2.77
|
3.38
|
4.55
|
|
32
|
1-1/4
|
42.2
|
1.65
|
2.77
|
3.56
|
4.85
|
|
40
|
1-1/2
|
48.3
|
1.65
|
2.77
|
3.68
|
5.08
|
|
50
|
2
|
60.3
|
1.65
|
2.77
|
3.91
|
5.54
|
|
65
|
2-1/2
|
73
|
2.11
|
3.05
|
5.16
|
7.01
|
|
80
|
3
|
88.9
|
2.11
|
3.05
|
5.49
|
7.62
|
|
90
|
3-1/2
|
101.6
|
2.11
|
3.05
|
5.74
|
8.08
|
|
100
|
4
|
114.3
|
2.11
|
3.05
|
6.02
|
8.56
|
|
125
|
5
|
141.3
|
2.77
|
3.40
|
6.55
|
9.53
|
|
150
|
6
|
168.3
|
2.77
|
3.40
|
7.11
|
10.97
|
|
200
|
8
|
219.1
|
2.77
|
3.76
|
8.18
|
12.70
|
|
250
|
10
|
273
|
3.40
|
4.19
|
9.27
|
12.70
|
|
300
|
12
|
323.8
|
3.96
|
4.57
|
9.53
|
12.70
|
|
350
|
14
|
355.6
|
3.96
|
4.78
|
9.53
|
12.70
|
|
400
|
16
|
406.4
|
4.19
|
4.78
|
9.53
|
12.70
|
|
450
|
18
|
457
|
4.19
|
4.78
|
9.53
|
12.70
|
|
500
|
20
|
508
|
4.78
|
5.54
|
9.53
|
12.70
|
|
550
|
22
|
559
|
4.78
|
5.54
|
—
|
—
|
|
600
|
24
|
610
|
5.54
|
6.35
|
9.53
|
12.70
|
|
650
|
26
|
660
|
—
|
7.92
|
—
|
—
|
|
700
|
28
|
711
|
—
|
7.92
|
—
|
—
|
|
750
|
30
|
762
|
6.35
|
7.92
|
—
|
—
|
|
800
|
32
|
813
|
—
|
7.92
|
17.48
|
—
|
|
850
|
34
|
864
|
—
|
7.92
|
17.48
|
—
|
|
900
|
36
|
914
|
—
|
7.92
|
19.05
|
—
|
|
950–3000
|
38–120
|
965–3048
|
Customizable
|
Customizable
|
Customizable
|
Customizable
|
Applications of Industrial Stainless Steel Welded Pipe
According to the specification sheet, industrial stainless steel welded pipes are widely used in:
Petroleum industry
Natural gas transportation
Chemical processing
Electric power engineering
Thermal engineering
Nuclear power systems
Shipbuilding industry
Marine engineering
Water treatment systems
Bio-chemical industry
Pharmaceutical processing
Food industry
Desalination projects
LNG systems
Urban pipe gallery projects
Advantages of Stainless Steel Welded Pipe
Excellent Corrosion Resistance
Stainless steel pipes perform well in acidic, alkaline, chloride, and humid environments.
Wide Size Range
Industrial welded pipes are available from small diameter precision tubing to large-diameter transmission pipelines.
Smooth Surface Finish
The internal surface helps reduce fluid resistance and improves transportation efficiency.
Good Weldability
Low-carbon stainless steel grades such as 304L and 316L provide stable welding performance.
Long Service Life
Compared with ordinary carbon steel pipes, stainless steel welded pipes offer better durability and reduced maintenance costs.
How to Select the Right Stainless Steel Welded Pipe
Choose the Correct Material Grade
304/304L for general industrial applications
316L for chloride or marine environments
2205 duplex for high-pressure corrosive systems
310S for high-temperature service
Confirm Pipe Dimensions
Select suitable:
Outside diameter
Wall thickness
Pressure rating
Schedule number
Verify Standards
Ensure the pipe complies with:
ASTM
ASME
API
DIN
GB
Project specifications
Evaluate Operating Environment
Consider:
Temperature
Pressure
Corrosion medium
Transportation fluid
FAQ
1. What is stainless steel welded pipe?
It is a stainless steel pipe manufactured by rolling and welding stainless steel plate or coil.
2. What is the difference between welded pipe and seamless pipe?
Welded pipe is formed through welding processes, while seamless pipe is produced without a weld seam.
3. Which stainless steel grade is best for corrosion resistance?
316L and duplex stainless steel grades provide better corrosion resistance than standard 304 stainless steel.
4. What standards are commonly used for stainless steel welded pipe?
Common standards include ASTM A312, ASTM A358, ASME B36.10, and ASME B36.19.
5. Where are stainless steel welded pipes used?
They are widely used in oil & gas, chemical plants, water treatment, shipbuilding, food processing, and LNG systems.
English
Español
Tel : +86-18565811709
Email : 
News
