【Daily Question】【AC Version for Static Equipment...Question 164】June 13, 2019 Multiple-choice questions...Essay questions
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bg4.png 【Daily Question】 【AC Version for Static Equipment...Question 164】 June 13, 2019 Multiple-choice questions...Essay questions .............................................................Reward rules: 3 Wealth for participation, 5–10 Wealth for answers that are close to the correct ones. ........................................................................... GB151 specifies under what circumstances carbon steel tube boxes require stress-relief heat treatment? ...................................................................... Answer: 1) Those with partition diaphragms 2) Those with lateral openings whose diameter exceeds 1/3 of the cylinder’s inner diameter 3) Floating head covers
1) ??Those with intermediate partition plates 2) Those with lateral openings whose diameter exceeds 1/3 of the inner diameter of the cylinder 3) Floating head covers
1) Those with segmented partitions； 2) Those with a lateral opening diameter exceeding 1/3 of the cylinder’s inner diameter ； 3) Floating head cover.
With partition diaphragms, floating head covers, and lateral openings with a diameter greater than 1/3 of the cylinder’s inner diameter
1) ??Those with segmented partitions； 2) Those with a lateral opening diameter exceeding 1/3 of the cylinder’s inner diameter ； 3) Floating head cover.
With partition plates, where the diameter of the lateral openings exceeds 1/3 of the inner diameter of the cylinder, floating head cover
Answer: Stress-relief heat treatment is required for carbon steel tube boxes in the following situations: 1. When equipped with partition diaphragms； 2. The diameter of the lateral opening exceeds 1/3 of the inner diameter of the cylinder.
a) For tube boxes and floating head covers made of carbon steel or low-alloy steel, as well as those with lateral openings exceeding 1/3 of the cylinder’s inner diameter, stress-relief heat treatment shall be carried out after welding; the sealing surfaces of the equipment flanges must be processed after heat treatment. b) Unless otherwise specified in the drawings, austenitic stainless steel tube boxes and floating head covers do not require heat treatment. The purpose of heat treatment is to eliminate welding stresses and prevent deformation of the sealing surfaces of the tube box partitions
There are partitions, with lateral openings exceeding 1/3 of the inner diameter; the deformation rate of the cylinder exceeds the standard requirements
GB151 stipulates that stress-relief heat treatment is required for carbon steel tube boxes in the following 3 situations: 1) Those with section dividers； 2) Those with a lateral opening diameter exceeding 1/3 of the cylinder’s inner diameter ； 3) Floating head cover.
1. Welded with step partition plates； 2. The diameter of the lateral opening exceeds 1/3 of the inner diameter of the cylinder.