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Son Ha SSP Stainless Steel Pipe Thickness Chart 2025

27/07/2025

The thickness of stainless steel pipes is a crucial factor determining their durability, load-bearing capacity, applications, and lifespan in both civil and industrial projects. As a pioneering manufacturer of stainless steel pipes in Vietnam, Son Ha SSP presents the most detailed, accurate, and updated stainless steel pipe thickness chart for 2025 – catering to all usage needs, from decorative to heavy industrial applications.

1. Understanding Symbols in the Stainless Steel Pipe Thickness Chart

When consulting a stainless steel pipe thickness chart, you’ll often encounter abbreviations representing important technical specifications. A clear understanding of these symbols will help you easily select the correct pipe type for your specific needs. Here are some key symbols:

OD (Outside Diameter): This indicates the nominal outside diameter of the pipe, measured from its outermost edge. This metric is fundamental for determining the overall size, with common units being millimeters (mm) or inches.
Phi (Ø): In Vietnam, the Phi (Ø) symbol is also commonly used to denote the outside diameter, equivalent to OD but often rounded for easier readability and use.
- Example: An OD of 21.34mm according to ASME standards will be commonly referred to as Phi 21.
NPS (Nominal Pipe Size): Alongside the above two symbols, NPS refers to the nominal size of the pipe. While it doesn’t represent the actual physical diameter, it plays a vital role in classifying and connecting pipes within industrial systems.
WT (Wall Thickness): This parameter indicates the thickness of the material forming the stainless steel pipe wall. This thickness directly determines the pipe’s pressure resistance, durability, and lifespan during use. WT is typically expressed in millimeters (mm) or inches, clearly distinguishing between pipes with the same outside diameter but different wall thicknesses.
Inch (in or “): A common unit of length in the imperial system, often used to specify the length or thickness of stainless steel pipes.

Millimeter (mm): A unit of length in the metric system, equivalent to 1/1,000 of a meter. Millimeters are used for measuring small dimensions, especially material thickness in technical specifications.

Description of stainless steel pipe thickness

2. Latest Son Ha SSP Industrial Stainless Steel Pipe Thickness Chart

Accurately selecting the correct stainless steel pipe thickness for industrial applications is crucial for ensuring the operational efficiency and long-term durability of the entire system.

2.1. Domestic Industrial Stainless Steel Pipe Thickness Chart

Below is the standard thickness chart for Son Ha SSP industrial stainless steel pipes, manufactured in Vietnam under strict quality control processes.

Thickness

1.5

1.8

2.0

2.5

3.0

3.5

4.0

5.0

6.0

7.0

8.0

Outer diameter

NPS

1/8

10.29

✔

1/4

13.73

✔

3/8

17.15

✔

1/2

21.34

✔

27.2

✔

33.34

✔

42.7

✔

1-1/2

48.26

✔

50.8

✔

60.5

✔

76.2

✔

89.1

✔

3-1/2

101.6

✔

100

114.3

125

141.3

✔

150

168.28

✔

200

219.08

✔

30×30

✔

40×40

✔

50×50

✔

60×60

✔

80×80

✔

20×40

✔

25×50

✔

30×60

✔

40×80

✔

50×100

✔

2.2. Industrial Stainless Steel Pipe Dimensions According to ASTM A778 – A312 Standards

ASTM A778 and ASTM A312 standards set rigorous technical requirements for industrial stainless steel pipes to ensure optimal mechanical strength and corrosion resistance in harsh working conditions. Based on these standards, Son Ha SSP has developed a detailed industrial stainless steel pipe thickness chart, assisting users in selecting products suitable for various applications, from food processing and chemicals to construction and energy.

Thickness			SCH5S	SCH10S	SCH40S
Outer diameter
NPS	in	Outside Diameter (mm)
1/8	0.405	10.29		1.24	1.73
1/4	0.540	13.73		1.65	2.24
3/8	0.657	17.15		1.65	2.31
1/2	0.840	21.34	1.65	2.11	2.77
0.75	1.050	26.67	1.65	2.11	2.87
1.0	1.315	33.4	1.65	2.77	3.38
0.75	1.660	42.16	1.65	2.77	3.56
0.5	1.900	48.26	1.65	2.77	3.68
2.0	2.375	60.33	1.65	2.77	3.91
2.0	2.375	60.5	1.65	2.77	3.91
2.0-1/2	2.875	73.03	2.11	3.05	5.16
3.0	3.500	88.9	2.11	3.05	5.49
3.0	3.500	89.1	2.11	3.05	5.49
3-1/2	4.000	101.6	2.11	3.05	5.75
4.0	4.500	114.3	2.11	3.05	6.02
5.0	5.563	141.3	2.77	3.4	6.55
6.0	6.625	168.28	2.77	3.4	7.11
8.0	8.625	219.08	2.77	3.76	8.48

3. Son Ha SSP Decorative Stainless Steel Pipe Thickness Chart

Below is the Son Ha SSP decorative stainless steel pipe thickness chart:

Thickness

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.2

1.5

1. 8

2.5

Outer diameter

✔

3/8

9.5

✔

1/2

12.7

✔

5/8

15.9

✔

3/4

19.1

✔

7/8

22.2

✔

25.4

✔

1-1/14

27.2

✔

1-1/14

31.8

✔

33.34

✔

1-1/2

38.1

✔

41.3

✔

42.7

✔

48.26

✔

50.8

✔

60.5

✔

2-1/2

63.5

✔

76.2

✔

89.1

✔

101.6

✔

4. Why Consider Stainless Steel Pipe Thickness?

Choosing the right stainless steel pipe thickness not only ensures aesthetic appeal but also directly impacts the quality and efficiency of the project. Here are the reasons why you shouldn’t overlook it:

Impact on Load-Bearing Capacity: Thin stainless steel pipes are prone to dents and deformation under heavy loads or strong impacts.
Increased Project Lifespan: Thicker pipes generally offer better corrosion resistance and leak prevention in harsh environments.
Reduced Maintenance Costs: Using products with the correct thickness for their application helps prevent damage, reducing repair or replacement costs.
Meeting Technical Requirements: Many industrial projects, factories, and fluid transfer systems have specific thickness standards to ensure operational safety.

Stainless steel pipe thickness directly affects the quality of the project.

5. Manufacturer and Distributor of Diverse, Quality Stainless Steel Pipes

Sơn Hà SSP is a leading brand in the manufacturing and supply of high-quality industrial stainless steel pipes, meeting stringent international standards. With over 25 years of development, Sơn Hà SSP consistently delivers stainless steel pipes with superior durability, excellent corrosion resistance, and diverse applications – from industrial piping systems to large-scale projects across various sectors.

Sơn Hà SSP Stainless Steel Pipes

Our products are not only diverse in size, design, and stainless steel pipe thickness but also fully meet the rigorous technical requirements of our customers. When you choose Sơn Hà SSP, you will find a wide range of stainless steel pipe designs and sizes, engineered and manufactured to cater to your diverse needs at highly competitive prices.

Through this article, you have surely gained a better understanding of the symbols and thickness of stainless steel pipes. If you are looking to purchase stainless steel pipes, please contact Sơn Hà SSP via Hotline 1800 6566 or our official website sonhassp.com for free consultation and to learn more about industrial stainless steel pipe solutions suitable for your project!