Matching principle between elbow pressure rating and pipeline system design pressure

The pressure rating of the elbow (such as Class 150/300/600) needs to be strictly matched with the design pressure, temperature, and medium characteristics of the pipeline system to ensure safe operation of the system. The following are the specific matching logic and key points:

1、 Definition and classification of pressure levels

Class series standards

Comparison of nominal pressure (PN)

2、 Matching principle: Design pressure ≤ MAWP elbow

Core Logic

Temperature correction method

3、 Selection steps and precautions

Selection steps

Precautions

4、 Common Misconceptions and Case Analysis

Misconception 1: Only select based on design pressure, ignoring the influence of temperature

Misconception 2: Confusing Class and PN series