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  1. Zzelk

    Youngs modulus of CFRP tank

    Hi I am trying to calculate the displacement of the top of a 14 m tall CFRP tank. The manufacturer doesn't tell us what the Young's modulus of the material is. What is a reasonable range of values to assume? I find conflicting information online. In the ASME-RTP-1 code, table 2A-3, it says it...
  2. Zzelk

    API 650 Storage Tank made from CFRP --- help calculating longitudinal compressive stress

    Hi all According to the API 650 E.6.2.2.3, the allowable longitudinal shell membrane compression stress is Fc = 883*t/(2.5D)+7.5*sqrt(GH) (assume that GHD^2/t^2 <44) It demands that this value is less than 0.5Fy. What is Fy for CFRP? Thanks!!
  3. Zzelk

    api 650 uplift section unclear with units

    Hi all Im confused about this sentence written in section E.6.2.1.2: "When tanks are anchored, the resisting weight of the product shall not be used to reduce the calculated uplift load on the anchors. The anchors shall be sized to provide for at least the following minimum anchorage...
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