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What is Differences between ASME 31.1 & 31.3?

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There are so many differences which can be observed after the deep study of two code, however I would like to highlight some differences between the above two code-

B3 1.3 deals with process piping: piping typically found in petroleum, refineries, chemical, pharmaceutical, textile, paper, semiconductor, and cryogenic plants, and related processing plants and terminals.

The factor of safety considered is 3, so thickness is less and more risk is involved.
Normal designed life of the plant is approx. 20-25 years.

B3 1.1 deals with power piping: piping typically found in electric power generating stations, in industrial and institutional plants, geothermal heating systems, and central and district heating and cooling systems.

The factor of safety considered is 4, so thickness is more and less risk is involved. Normal designed life of the plant is approx. 40-45 Years. However there is also difference in the way the “stress intensification factor” is considered in both the code. In 31.3 stress intensification factor is distinguished in two part i.e In-plane stress and out plane stress, however in 31.1 both are same.

There are so many differences. However, the above are some important one. Please correct me if I am wrong.
RK-
technip

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5 Comments on "What is Differences between ASME 31.1 & 31.3?"

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Ahmed Alaa
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Ahmed Alaa
2 months 3 days ago

Good job🖒💪

Dharmendra singh
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Dharmendra singh
1 year 27 days ago

Dear sir
ut,mpt,dpt techinican job

karthick
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karthick
1 year 11 months ago

downstream and upstream means…please

jaleel
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jaleel
2 years 7 days ago

ASME mainly used for downstream operations and API Used for upstream operations

usf
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usf
2 years 7 days ago

what is the major difference between API & ASME standards

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