【Daily Question】【Static Equipment AC Version...Question 124】July 23, 2019 Multiple-choice...Fill-in-the-blank

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【Daily Question】【Static Equipment – AC Version...Question 124】July 23, 2019: Multiple-choice questions...Fill-in-the-blank questions...........................................................................Reward rules: 3 Wealth points for participation, 10 Wealth points for correct answers. No scoring will be given after two days, except during holidays. ...........................................................................a. For the welds on the sphere shell and those that are directly welded to it, ( ) flux-coated electrodes should be used, and ( ) re-inspection should be carried out according to the batch numbers. b. A ( ) hole should be provided at the center of the bottom plate of the spherical tank pillar, and the foundation bolt holes should be ( ) holes. ...........................................................................Comment: The most basic welding requirements for spherical tanks. Comment: Refer to GB12337-5.4.5 and 5.4.6 for the basic requirements regarding the structure of spherical tanks. Many people make the mistake of not specifying the \"radial\" nature of these elongated circular holes; it is precisely by having radial elongated holes that their purpose is fulfilled, allowing the support legs to slide radially and thereby reducing stress concentration. Fun answer: “A manhole should be installed at the center of the floor of the spherical tank support,” and the experts carefully considered how to climb in through that manhole. Answer: For the welds of the sphere shell and those that are welded directly to it, (low-hydrogen) flux-cored electrodes should be used, and tests for (diffused hydrogen) should be conducted on a batch basis. A (through) hole should be provided at the center of the spherical tank support base plate, and the anchor bolt holes should be (radially oblong) holes.