A lot of time our customers are searching for certain quality grades but do not understand or get confused by the name of the grade and their equivalent. To clarify some of it and to simplify by the same, the below information will be useful:
Steels produced to EN standards – for example pressure vessel steels such as P355 or structural steels S275 have names that tell you a lot about the steel without having to look the details up in the relevant standard. The way that they are named in set out in EN 10027/EN 10210 and by following a few simple rules you should soon be a master of know steel properties from the grade alone.
This page tells you about how to decipher these steel names for some common grade of pressure vessel and structural steels that we have in stock. Once you know how it works it is easy to use. Structural and pressure vessel steels have a standardised naming convention and this is laid out in /EN 10210 Designation System for Steels.
Whilst both are similar they are each subtly different and it is important to know what all the components of a steel name mean
EN STRUCTURAL STEEL NAMES TO EN 10027/EN 10201
The first letter S standards for Structural. P stands for Pressure and this is the way you initially tell the grades apart.
The next set of 3 digits gives the steel’s minimum yield strength. So S355 has a minimum yield strength of 355 MPa for the smallest thickness range covered by the relevant standard – i.e. EN10025.
These are the basics. You can then have up to 3 groups of characters providing more information.
The first group concerns the impact testing of the steel – what joule value (J, K or L) and at what temperature. (R,0,2,3,4,5,6)

• J = 27J
• K = 40J
• L = 60J

and

• R = 20 °C (Room Temperature)
• 0 = 0 °C
• 2 = -20 °C
• 3 = -30 °C
• 4 = -40 °C
• 5 = -50 °C
• 6 = -60 °C

An easy way of remembering the temperatures is that each increase in the digit means another 10 degrees below zero. At Trio Steel, we stock plates and hollow pipes in the below above grades. You can visit the below link for details:
https://www.triosteel.com/en-10210-1-grade/
https://www.triosteel.com/s335n-plates-2/

Carbon Steel Pipes & Its Uses:

Carbon Steel Pipes is the most commonly used material in all industries for process piping. It is preferred due to its wide availability, high strength, and good weldability, for example, screwed, socket-welded, and butt-welded. They are known as carbon steel pipes as carbon is the main alloying element and its properties are defined by the amount of carbon it has. Carbon Steel pipe should be selected for the required strength and durability required for the application checking the requirement of Yield Strength, Tensile Strength, ductility, and machinability required to join it. The pipe must withstand the pressure, temperature, and corrosion conditions of the application. These requirements are met by selecting a pipe made to an appropriate ASTM or API standard. 

 

In the API categories you have the following options:

1. API 5L GR B PSL1/PSL2 Seamless & Welded Pipes
2. API 5L GR X42 PSL1/PSL2 Seamless & Welded Pipes
3. API 5L GR X46 PSL1/PSL2 Seamless & Welded Pipes
4. API 5L GR X52 PSL1/PSL2 Seamless & Welded Pipes
5. API 5L GR X56 PSL1/PSL2 Seamless & Welded Pipes
6. API 5L GR X60 PSL1/PSL2 Seamless & Welded Pipes
7. API 5L GR X65 PSL1/PSL2 Seamless & Welded Pipes
8. API 5L GR X70 PSL1/PSL2 Seamless & Welded Pipes
9. API 5L GR X80 PSL1/PSL2 Seamless & Welded Pipes
10. API 5L GR X100 PSL1/PSL2 Seamless & Welded Pipes
11. API 5L GR X120 PSL1/PSL2 Seamless & Welded Pipes

 

In the ASTM Categories you have the following options:

1. ASTM A106 GR B Seamless & Welded Pipes
2. ASTM A106 GR C Seamless & Welded Pipes
3. Low Temp ASTM A333 GR 6 Seamless & Welded Pipes
4. ASTM A671/A672 CB/CC 60/65/60 EFW Pipes.

 

Uses & Applications:

Industries across the world in different fields use various carbon steel pipes in seamless/welded options depending on the use. Some of the uses are:

1. Transporting Oil & Gas
2. Drilling & Offshore Applications
3. FPSOs & Building foundations
4. High-Pressure Applications
5. Transporting water & wastewater underground
6. Chemical Processing
7. Rigs Building

 

At Rexal Tubes, we offer a wide variety of these carbon steel pipes along with the technical advice on what material will be suitable depending on the use.