Piping Max Working Pressure

In summary, the maximum working pressure for 3" diameter schedule 80S piping at an operating temperature of 100 deg celcius is 262 Barg according to piping tables. However, this pressure may be exceeded if it still complies with ASME B31.3 standards, which require identification of the material and other factors to determine the design pressure. It should also be noted that any modifications to the pipe, such as threading or welding, can affect the pressure rating. The safety factor for this type of piping is generally 1.5 to yield and 3.5 to ultimate.
  • #1
alandone
1
0
What is the maximum working pressure of 3" diameter schedule 80S piping at an operating temperature of 100 deg celcius.
According to my piping tables it is 262 Barg, ,but i want to know if this pressure can be exceeded and still comply with ASME B31.3
Also what is the safety factor in the design.
 
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  • #2
What material?
 
  • #3
Hi alandone. In order to determine design pressure for a pipe, you have to identify the material (including ASTM spec and grade), figure out the wall tolerance (usually 12%) and a few other things, then go to one of the 3 equations given in ASME B31.3, para. 304.1.2. Note that if you thread the pipe or cut holes/weld on it, that changes the pressure rating (reduces it). So the values given in para 304.1.2 are only for straight pipe, butt welded or socket weld.

Regarding safety factor, it's generally 1.5 to yield and 3.5 to ultimate.
 

What is Piping Max Working Pressure?

Piping max working pressure refers to the maximum pressure that a piping system can withstand while in operation without causing damage or failure.

How is Piping Max Working Pressure determined?

Piping max working pressure is determined by factors such as the material, size, and temperature of the piping system, as well as the type of fluid or gas being transported through it.

Why is Piping Max Working Pressure important?

Piping max working pressure is important because it ensures the safe and efficient operation of a piping system. If the pressure exceeds the maximum limit, it can lead to leaks, ruptures, or other failures that can be hazardous to both the system and those around it.

What happens if the Piping Max Working Pressure is exceeded?

If the piping max working pressure is exceeded, it can lead to leaks, ruptures, or other failures, which can result in downtime, costly repairs, and potentially dangerous situations.

How can Piping Max Working Pressure be increased?

Piping max working pressure can be increased by using stronger materials, increasing the thickness or diameter of the pipes, or implementing pressure-reducing devices such as regulators or relief valves.

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