Is 304 material available for pressure vessel classified equipment?
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Can 304 material be used for pressure vessel classified equipment? During the supervisory inspection of our company's pressure vessel equipment, 304 is not allowed to replace OCr18Ni9. It is said that 304 material is not included in GB150. What do you think?
Which supervisory inspection is this? Always swim against the current. I do not use 304 when designing drawings. I always use 0Cr18Ni9, but manufacturing is allowed to use 304 instead.
It should be possible, but it requires corresponding welding evaluation according to JB4708. Nowadays, most manufacturers, especially thin plates below 10, are mostly 304 grade. Shanggang and Taigang have the grade 0Cr18Ni9.
Domestic brands should be used when designing. In our company, 304 is just the abbreviation of 0C18Ni9. Grade 304 is rarely used nowadays.
Total nonsense, 304 is 0Cr18Ni9, the two are connected, 304 is just a simplified code name.
It should be possible, but you must refer to the relevant regulations for using foreign brand materials!
完全胡说，304就是0Cr18Ni9，这两个是相通的，304只不过是个简化代号罢了================================================================ 304只是相当于0Cr18Ni9,并不能完全等同化学成分就有点差别
I have never heard that pressure vessels cannot be made of 304 material! The evaporators and sugar boilers we make use 304. 304 is the abbreviation of 0C18Ni9. People in the supervisory inspection unit should go to elementary school!
Please don't mislead people. You don't have a clear understanding of material standards. 304 is the American standard brand and 0Cr18Ni9 is the national standard brand. Their mechanical properties are similar and sometimes they can be substituted. There are some differences in chemical composition.
This is a matter of material substitution of domestic and foreign brands. As long as the formal substitution procedures are completed, it can be used. The specific operation methods are clearly written in the regulations. For details, see Articles 22 and 23 of the regulations! This post was last edited by appletnt on 2009-3-27 15:49 ]
One is the American standard, the other is the national standard, and the ingredients are basically the same. As the pot inspection department should be deemed equal. Otherwise, a large number of imported equipment or equipment made of imported materials would not be able to pass.
It should be possible, but the standards used are different. In fact, in essence, they are the same thing.
Not substituted. 304 is only equivalent to 0Cr18Ni9, not completely equivalent. When the drawing requires it to be used for 0Cr18Ni9, the design institute can issue a modification order.
It is not called 0Cr18Ni9 now, it should be called 06Cr19Ni10
I agree with what the 9th floor said. The chemical composition of 304 is very close to that of 0Cr18Ni9, so 304 is used to replace 0Cr18Ni9.； However, during the supervisory inspection of the National Inspection Institute, the staff of the National Inspection Institute did not agree to pass it because the manufacturing unit manufactured it in accordance with GB150, and GB150 did not have supervisory inspection content for 304 materials. In other words, the 304 material is an American brand. In our case, * * Manufacturing and production should also follow our * * relevant standards.