Material selection for vinyl spherical tanks

2020-06-10View Original

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In GB12337 "Steel Spherical Storage Tanks" and the standard interpretation, 15MnNiNbDR and 07MnNiMoDR have been successfully used in ethylene spherical tanks. However, in reality, I have seen many sets of 2000 cubic ethylene spherical tanks, basically using 07MnNiMoDR. I would like to ask: 1. Why is 07MnNiMoDR preferred? Because of its high strength and thin thickness, it is more economical? However, it is said that steel plates with high strength are more prone to cracks, although 07MnNiMoDR is a low welding crack sensitivity steel. 2. What is the reason why 15MnNiNbDR is not preferred? Is the welding rod difficult to match?

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Material selection for vinyl spherical tanks

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