Do you want heat treatment?
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Receiving a certain order: Amine-containing gas buffer tank; medium: amine-containing gases (water vapor, ammonia, hydrogen sulfide). Of which, the hydrogen sulfide content is about 60%) ； Design pressure: 0.25 MPa; Design temperature: 100°C; Volume: 15 cubic meters; Material: 20R. It is supposed that this environment does not involve wet H2S stress corrosion, nor is there any risk of poisoning, so heat treatment is not necessary. However, the customer insists on heat treatment – what should the designers do in such a situation? If the customer’s request is followed and heat treatment is carried out, should the material and welding processes also meet the requirements associated with wet H2S stress corrosion? This post was last edited by Lan Meng on 2009-3-5 15:13.]
There’s no way to guarantee that stress corrosion won’t occur, so the user’s request is reasonable. Do not look at the wet hydrogen sulfide stress corrosion environment specified in the tolerance standards.
Safety regulations are part of the safety technical standards; they are mandatory and represent the minimum requirements. As users, one can have higher standards, so there is no issue with these requirements – it’s just a matter of complying with them.
Users put forward their requirements based on actual production experience, and standards also need to be improved
The standards represent the minimum requirements; you can go above them, but not below. Generally, meeting those standards is sufficient – there’s no need to be overly strict (considering cost factors). However, if the user has higher expectations and isn’t afraid to spend money, then there’s nothing to argue about :lol Last edited by gzk1986 on 2009-3-5 10:41
Is it only natural to serve users? Since such a requirement exists, and given that the standards have been raised, it can be clearly specified in the technical requirements.
This user’s request is legitimate; generally, heat treatment in an H2S environment is reasonable
Heat treat according to the stress corrosion situation
I haven’t learned what you’re discussing yet; I don’t know if I’ll ever learn this knowledge – there’s nothing I can do about it.
There is water vapor in it, so it’s not wet hydrogen sulfide; moreover, its concentration has exceeded the specified limit, so heat treatment is necessary. Moreover, the users also require heat treatment
Heat treatment will be carried out according to the conditions of stress corrosion to meet the user’s requirements.
In a wet hydrogen sulfide environment where the concentration exceeds the specified level, heat treatment should be carried out in accordance with the standards and the user’s requirements.
Since it is the client’s request, and as long as it does not violate relevant regulations, of course it’s possible