For 0Cr18Ni9 steel pipes with a diameter of 377 mm and a wall thickness of 28 mm, how should the allowable stress be determined?
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We have a device made of S30408 material, with a main diameter of 377 mm and a wall thickness of 28 mm. It is intended to use 0Cr18Ni9 steel pipes as a substitute, but the allowable stress specified in the standards is only below 18 mm; so how should the allowable stress for 28 mm be determined?
This post was last edited by Wen Bing on 2011-6-21 at 10:49. It should be a forged piece; is it possible to buy seamless tubes of such thickness? You can’t calculate it without the allowable stress
Please refer to the material section of the GB150 approval draft, or the attachments containing the relevant technical measures from Document No. 86 of the Solid Content Regulations
Thank you all. Also, for stainless steel pipes with a wall thickness of 45 mm, what should be used as the allowable stress? It’s possible that no products are manufactured using this type of tube; however, according to the size series specified in the tube standard GB/T17395-2008, such tubes do exist. The maximum wall thickness of the tube can reach 80 mm.
I think they might all be thick-walled pipes, that is, forgings