Do the pipe fittings required for carbon dioxide stripping urea have to be imported?
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The design documents of the design institute indicate that the pipe fittings, valves and regulating valves required for the high-pressure ring of urea in the carbon dioxide stripping method must be imported. Can they be made domestically? Please feel free to enlighten me! This post was last edited by lxq700918 on 2009-3-4 20:45 ]
We cannot say whether it will work or not. The key is to consider the service life, quality, operating dynamics, etc., and purchase the spare parts you need based on your actual situation!
The selection of high-voltage coil material equipment mainly depends on the corrosion resistance of the material. Currently, 316mod grade material is usually used. Or 25-22 dual-phase steel material. If you have enough funds, you can also use Sandvic’s new material safurex ； At present, 316mod and 25-22 can be produced in China, and they also have application performance. When you consider importing, it mainly depends on what you think, but the price difference is huge.
The selection of high-voltage coil material equipment mainly depends on the corrosion resistance of the material. Currently, 316mod grade material is usually used. Or 25-22 dual-phase steel material. If you have enough funds, you can also use Sandvic’s new material safurex ； At present, 316mod and 25-22 can be produced in China, and they also have application performance. When you consider importing, it mainly depends on what you think, but the price difference is huge.
The pipes and regulating valves required for the high-pressure ring of urea in the carbon dioxide stripping method are best imported. The quality of domestic products is unstable, especially the resistance to intergranular corrosion is poor. According to the information, Sandvik's new material safurex has very excellent performance. However, as for whether Sandvik's new material safurex can be used, it is understood that the use of Snamika Bang's process package is required before the use of this material is allowed. Therefore, it’s not just what you want to use! This is the so-called technological monopoly, but I don’t know if similar restrictions have been relaxed in the past two years.
The pipe fittings, valves, and regulating valves required for the urea high-pressure ring of the carbon dioxide stripping method do not have to be all imported. As long as the quality meets the requirements, they are completely fine. But the quality of domestic products is worrisome, so it’s no wonder that design institutes don’t trust them. 316 mod-level materials can only be used as 316. In the same way, 316L (mod) should be replaced with 25-22-2 material. In short, if you want to meet the corrosion resistance requirements, you need to purchase it at a higher level. If you are "not short of money", it is certainly better to choose imported materials. ;P
The pipe fittings, valves, and regulating valves required for the high-pressure ring of urea in the carbon dioxide stripping method do not have to be all imported. Our factory uses 316L for some parts, and 25-22-2 materials are rarely used, mainly depending on the influence of temperature.； Corrosion resistance requirements require a higher level of procurement. This post was last edited by lxq700918 on 2009-3-4 12:33 ]