The differences between high pressure boiler pipe and low and medium pressure boiler pipe

1. Different working environment

Low and medium pressure boiler pipe: the working pressure is generally not more than 5.88Mpa, and the working temperature is below 450℃;

High-pressure boiler pipe: the working pressure is generally above 9.8Mpa, and the working temperature is between 450℃～650℃.

2. Different implementation standards

Implementation standard for low and medium pressure boiler pipes: GB3087-2018. There are 43 kinds of steel pipe specifications for boilers of various structures, with an outer diameter of 10～426mm. There are 29 kinds of wall thickness 1.5～26mm. However, the outer diameter and wall thickness of superheated steam pipes, large smoke pipes, small smoke pipes and arched brick pipes for locomotive boilers are otherwise specified.

High-pressure boiler pipe implementation standard: GB5310-2018, the outer high-pressure boiler pipe diameter of the hot-rolled pipe is 22-530mm, and the wall thickness ranges from 20-70mm. The outer diameter of the cold drawn (cold rolled) pipe is 10～108mm, and the wall thickness ranges from 2.0～13.0mm.

3. Different prices: the price of high-pressure boiler pipes is higher than that of low and medium pressure boiler pipes.

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