Stainless Steel Pipes
Stainless steel pipes are manufactured according to ASTM A312 standard. The material is available in grade SS316/316L and made in standard length of 6 meters long. Dual grade SS316/316L stainless steel pipes are known to deliver exceptional performance and are generally developed for meeting the market demands.
SS316 stainless steel has more carbon than SS316L. Nickel and molybdenum are the main chemical ingredients which are used in manufacturing process of stainless steel SS316 pipes. With adding molybdenum in the producing process, it effectively improves alloy corrosion resistance, specifically in the environment that is highly exposed to crevice corrosion in chloride based environments.
SS316 stainless steel has more carbon than SS316L. Nickel and molybdenum are the main chemical ingredients which are used in manufacturing process of stainless steel SS316 pipes. With adding molybdenum in the producing process, it effectively improves alloy corrosion resistance, specifically in the environment that is highly exposed to crevice corrosion in chloride based environments.
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Material Specifications |
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Dimension Specifications |
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Finishing |
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What are Stainless Steel Pipes Specifications
1. What are stainless steel pipes used for?
Piping is used in various industries as below:
Piping is used in various industries as below:
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Annealed & Pickled Stainless Steel Pipe
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2. What is dual grade stainless steel?
The austenitic structure helps the pipes to get excellent toughness even if it reaches cryogenic temperature. This is the main reason why stainless steel material is a common choice for piping applications. It has excellent forming and welding characteristics which allows different flexibility during installation.
The austenitic structure helps the pipes to get excellent toughness even if it reaches cryogenic temperature. This is the main reason why stainless steel material is a common choice for piping applications. It has excellent forming and welding characteristics which allows different flexibility during installation.
Chemical Element |
SS316 |
SS316L |
Carbon (C), % |
0.08 |
0.035 |
Manganese (Mn) , % |
2.00 |
2.00 |
Silicon (Si), % |
1.00 |
1.00 |
0.045 |
0.045 |
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Sulphur (S), % |
0.030 |
0.030 |
16.0 - 18.0 |
16.0 - 18.0 |
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Nickel (Ni), % |
11.0 - 14.0 |
10.0 - 14.0 |
2.0 - 3.0 |
2.0 - 3.0 |
Table 1: Chemical element of ASTM A312 dual spec SS316/316L pipe
3. What is difference between tubes and pipes?
Tubes and pipes are difficult to identify occasionally and some people use the name of tube and pipe interchangeably. However, there are significant differences between tubes and pipes. Tubes are measured in outer diameter and wall thickness. The tube is produced with close tolerance range and requires precise outer diameter and wall thickness to identify its working pressure.
While pipes are specified by nominal pipe size and schedule wall thickness. It has two different nominal pipe size measurement standard which is American National Standard Institute (ANSI) and Japanese Industrial Standard (JIS). Both pipes and tubes have their respective measurement chart to determine its outer diameter size.
Tubes and pipes are difficult to identify occasionally and some people use the name of tube and pipe interchangeably. However, there are significant differences between tubes and pipes. Tubes are measured in outer diameter and wall thickness. The tube is produced with close tolerance range and requires precise outer diameter and wall thickness to identify its working pressure.
While pipes are specified by nominal pipe size and schedule wall thickness. It has two different nominal pipe size measurement standard which is American National Standard Institute (ANSI) and Japanese Industrial Standard (JIS). Both pipes and tubes have their respective measurement chart to determine its outer diameter size.
Description |
Pipe |
Tube |
Size chart |
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Wall thickness |
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Production range |
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Production precision |
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Production process |
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Production time |
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Market material cost |
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Table 2: Different criteria for pipe and tube
4. What is the wall thickness of a Schedule 40 stainless steel pipe?
Stainless Steel Pipe "SCH" Thickness
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Schedule (SCH) is the term used to measure the
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The schedule thickness will affect the inner diameter (ID) of a pipe. The inner diameter measures when the outer dimeter minus two times the schedule in wall thickness. The piping working pressure can be determined by the schedule wall thickness.
5. How do you join a stainless steel pipe?
There are several types of pipe connection and the pipe end connection can be customized according to the installation method. There are 3 different types of pipe end connection: plain end, threaded end and bevel end connection.
There are several types of pipe connection and the pipe end connection can be customized according to the installation method. There are 3 different types of pipe end connection: plain end, threaded end and bevel end connection.
Connection Types |
Features |
Plain End |
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Threaded End |
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Bevel End |
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Table 3: 3 Types of pipe end connection
To ensure pipe joining quality, the pipe tolerance have to be taken into consideration. The pipe made according to ASTM A312 has outer diameter and wall thickness tolerance as follows:
Pipe Outer Diameter |
Outer Diameter Tolerance |
Wall Thickness Tolerance |
1/8”NB – 1 1/2”NB |
+0.40mm, -0.8mm |
+/- 12.50% |
2”NB – 4”NB |
+/-0.8mm |
+/- 12.50% |
5”NB – 8”NB |
+1.6mm, -0.8mm |
+/- 12.50% |
Table 4: ASTM A312 pipe manufacture tolerance
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