NEWS

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Precautions for the use of headers

Time:

Jul 07,2023

Author:

Henan Huayang Head Co.

Source:

Henan Huayang Head Co.

1、Please measure the outer circumference of the head.

2、Mark the cylinder and head.

3、Position welding in the order shown in the drawing.

4、Positioning welding is completed.

5、Pay attention to the protection of the surface of stainless steel head.

6、After group welding of head and cylinder, clean up welding slag, spatter and pollutants in weld seam, heat-affected zone and its surrounding in time, and carry out PT inspection and surface pickling.

Prevent the surface of stainless steel head from bumping and scratching.

8, avoid forced group welding. Structural design to prevent excessive constraint stress.

9, the chlorine ion content of the water used for hydraulic test shall not be greater than 25mg/L, and shall be blown dry in time after the test.

10, stainless steel pickling can not use hydrochloric acid and other reducing acids.

11、Carbon steel head will be cracked under the environment of nitrate, ammonia, alkaline sodium, etc. Please state the elimination of residual stress when ordering the head.

12、Austenitic stainless steel will have stress corrosion cracks under specific environment with chloride ion, please choose suitable material when designing.

13、Carbon steel containers which need hot-dip galvanizing or aluminum infiltration, please do heat treatment first to remove residual stress.

14、Prevent direct contact with carbon steel, avoid iron ion pollution.

15、Not stored in the open air, prevent from rain.

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