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How is the resisting weight for API-650 Section 3.11 determined?

April 26, 2017api-650 resisting section weight

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How is the resisting weight for API-650 Section 3.11 determined?

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The resisting weight is the sum of the corroded shell weight, plus the weight of any shell attachments, plus a percentage of the roof framing and roof. This sum is then reduced by the internal pressure force. (The percent of the roof and framing weight supported by the shell can be determined by the software if a supported cone roof has been selected.