What considerations should be taken when choosing hydrogen-resistant plates?
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What considerations should be taken when using hydrogen-resistant plates such as Q245R(HIR) and Q345R(HIR)?
For those with specific technical requirements, there are quite a number of aspects that need to be met
1. Low hardness 2. Deoxidized steel 3. CLR
For specific requirements, refer to SH-T 3193-2017, Guidelines for the Design of Petrochemical Equipment in Wet Hydrogen Sulfide Environments. Q245R (HIC), Q345R (HIC), 20 forged (HIC), and 16Mn forged (HIC) are all well-established steel grades suitable for use in wet hydrogen sulfide environments. If the manufacturer’s production processes have been verified through HIC and SSCC tests, and the operating conditions are not as severe as those tested, it is not necessary to require HIC and SSCC testing for each batch of material； When the operating conditions are more severe than the test conditions, HIC and SCC tests under the operating conditions should be conducted on each batch of material. The same requirement applies to equipment manufacturers; it is not necessary to conduct HIC and SSCC tests on every piece of equipment.
The owner can take a look at the standards mentioned on floor 6; the requirements are very clear.
Many teachers have already explained the key points clearly: welding hydrogen-resistant steel involves purifying the weld seam, and what we can do is to use high-quality welding materials that are resistant to hydrogen.