【Daily Question】【Static Equipment AC Version...Question 138】August 6, 2019 Multiple-choice questions...Essay questions
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bg4.png【Daily Question】【AC Version for Static Equipment...Question 138】 August 6, 2019 Multiple-choice questions...Essay questions...........................................................................Reward rules: 3 Wealth points for participation, 2 Wealth points for getting one question right; up to a maximum of 10 Wealth points. No scoring will be given after two days, with holidays being an exception. ...........................................................................1. What requirements should be met in design and manufacturing when the medium poses extreme or high hazards?........................................................................... Answer: a) The material used for the equipment must be of grade at least Q235-C. Welded steel pipes shall not be used for takeover ； b) The flange type shall be of the long-diameter butt-weld type, and the sealing surface shall preferably be of the male-female type. Its pressure rating: the equipment flanges must be at least 1.6 MPa, and the pipe flanges must also be at least 1.6 MPa (when additional bending moments are considered, the value should be at least 2.5 MPa). Try to choose manholes with a smaller nominal diameter ； c) The welded structure of the container shall adopt a fully penetrated design ； d) For the longitudinal weld joints of Class A cylinders in container, a welding test plate shall be prepared for each manufactured product ； e) 100% radiographic or ultrasonic testing shall be conducted on Class A and Class B weld joints of the container. For weld joints where the pipe fitting has a nominal diameter of less than 250 mm is connected to a long-diameter flange or to another pipe fitting, only magnetic particle or penetrant testing is performed. Class C and D weld joints are subject to 100% magnetic particle or penetrant testing ； f) Glass tube level gauges are generally not used for level measurement ； Safety relief devices must use rupture disc assemblies ； g) Non-stainless steel containers shall undergo post-weld stress-relief heat treatment ； h) Conduct a airtightness test after the voltage withstand test is passed. Its test pressure, test medium, and inspection requirements shall be specified in the drawing. ..............................................................
a) The material used for the equipment shall not be lower than Q235-C. Welded steel pipes shall not be used for takeover ； b) The flange type shall be of the long-diameter butt-weld type, and the sealing surface shall preferably be of the male-female type. Its pressure rating: the equipment flanges must be at least 1.6 MPa, and the pipe flanges must also be at least 1.6 MPa (when additional bending moments are considered, the value should be at least 2.5 MPa). Try to choose manholes with a smaller nominal diameter ； c) The welded structure of the container shall adopt a fully penetrated design ； d) For the longitudinal weld joints of Class A cylinders in container, a welding test plate shall be prepared for each manufactured product ； e) 100% radiographic or ultrasonic testing shall be conducted on Class A and Class B weld joints of the container. For weld joints where the pipe fitting has a nominal diameter of less than 250 mm is connected to a long-diameter flange or to another pipe fitting, only magnetic particle or penetrant testing is performed. Class C and D weld joints are subject to 100% magnetic particle or penetrant testing ； f) Glass tube level gauges are generally not used for level measurement ； Safety relief devices must use rupture disc assemblies ； g) Non-stainless steel containers shall undergo post-weld stress-relief heat treatment ； h) Conduct a airtightness test after the voltage withstand test is passed. Its test pressure, test medium, and inspection requirements shall be specified in the drawing.
a) The material used for the equipment shall not be lower than Q235-C. Welded steel pipes shall not be used for takeover ； b) The flange type shall be of the long-diameter butt-weld type, and the sealing surface shall preferably be of the male-female type. Its pressure rating: the equipment flanges must be at least 1.6 MPa, and the pipe flanges must also be at least 1.6 MPa (when additional bending moments are considered, the value should be at least 2.5 MPa). Try to choose manholes with a smaller nominal diameter ； c) The welded structure of the container shall adopt a fully penetrated design ； d) For the longitudinal weld joints of Class A cylinders in container, a welding test plate shall be prepared for each manufactured product ； e) 100% radiographic or ultrasonic testing shall be conducted on Class A and Class B weld joints of the container. For weld joints where the pipe fitting has a nominal diameter of less than 250 mm is connected to a long-diameter flange or to another pipe fitting, only magnetic particle or penetrant testing is performed. Class C and D weld joints are subject to 100% magnetic particle or penetrant testing ； f) Glass tube level gauges are generally not used for level measurement ； Safety relief devices must use rupture disc assemblies ； g) Non-stainless steel containers shall undergo post-weld stress-relief heat treatment ； h) Conduct a airtightness test after the voltage withstand test is passed. Its test pressure, test medium, and inspection requirements shall be specified in the drawing.
Q235B and grade 20 steel per GB8163 cannot be selected
a) The material used for the equipment shall not be lower than Q235-C. Welded steel pipes shall not be used for takeover ； b) The flange type shall be of the long-diameter butt-weld type, and the sealing surface shall preferably be of the male-female type. Its pressure rating: the equipment flanges must be at least 1.6 MPa, and the pipe flanges must also be at least 1.6 MPa (when additional bending moments are considered, the value should be at least 2.5 MPa). Try to choose manholes with a smaller nominal diameter ； c) The welded structure of the container shall adopt a fully penetrated design ； d) For the longitudinal weld joints of Class A cylinders in container, a welding test plate shall be prepared for each manufactured product ； e) 100% radiographic or ultrasonic testing shall be conducted on Class A and Class B weld joints of the container. For weld joints where the pipe fitting has a nominal diameter of less than 250 mm is connected to a long-diameter flange or to another pipe fitting, only magnetic particle or penetrant testing is performed. Class C and D weld joints are subject to 100% magnetic particle or penetrant testing ； f) Glass tube level gauges are generally not used for level measurement ； Safety relief devices must use rupture disc assemblies ； g) Non-stainless steel containers shall undergo post-weld stress-relief heat treatment ； h) Conduct a airtightness test after the voltage withstand test is passed. Its test pressure, test medium, and inspection requirements shall be specified in the drawing.
a) The material used for the equipment shall not be lower than Q235-C. Welded steel pipes shall not be used for takeover ； b) The flange type shall be of the long-diameter butt-weld type, and the sealing surface shall preferably be of the male-female type. Its pressure rating: the equipment flanges must be at least 1.6 MPa, and the pipe flanges must also be at least 1.6 MPa (when additional bending moments are considered, the value should be at least 2.5 MPa). Try to choose manholes with a smaller nominal diameter ； c) The welded structure of the container shall adopt a fully penetrated design ； d) For the longitudinal weld joints of Class A cylinders in container, a welding test plate shall be prepared for each manufactured product ； e) 100% radiographic or ultrasonic testing shall be conducted on Class A and Class B weld joints of the container. For weld joints where the pipe fitting has a nominal diameter of less than 250 mm is connected to a long-diameter flange or to another pipe fitting, only magnetic particle or penetrant testing is performed. Class C and D weld joints are subject to 100% magnetic particle or penetrant testing ； f) Glass tube level gauges are generally not used for level measurement ； Safety relief devices must use rupture disc assemblies ； g) Non-stainless steel containers shall undergo post-weld stress-relief heat treatment ； h) Conduct a airtightness test after the voltage withstand test is passed. Its test pressure, test medium, and inspection requirements shall be specified in the drawing.
Answer: a) The material used for the equipment must be of grade Q235-C or higher. Welded steel pipes shall not be used for takeover ； b) The flange type shall be of the long-diameter butt-weld type, and the sealing surface shall preferably be of the male-female type. Its pressure rating: the equipment flanges must be at least 1.6 MPa, and the pipe flanges must also be at least 1.6 MPa (when additional bending moments are considered, the value should be at least 2.5 MPa). Try to choose manholes with a smaller nominal diameter ； c) The welded structure of the container shall adopt a fully penetrated design ； d) For the longitudinal weld joints of Class A cylinders in container, a welding test plate shall be prepared for each manufactured product ； e) 100% radiographic or ultrasonic testing shall be conducted on Class A and Class B weld joints of the container. For weld joints where the pipe fitting has a nominal diameter of less than 250 mm is connected to a long-diameter flange or to another pipe fitting, only magnetic particle or penetrant testing is performed. Class C and D weld joints are subject to 100% magnetic particle or penetrant testing ； f) Glass tube level gauges are generally not used for level measurement ； Safety relief devices must use rupture disc assemblies ； g) Non-stainless steel containers shall undergo post-weld stress-relief heat treatment ； h) Conduct a airtightness test after the voltage withstand test is passed. Its test pressure, test medium, and inspection requirements shall be specified in the drawing.
a) The material used for the equipment shall not be lower than Q235-C. Welded steel pipes shall not be used for takeover ； b) The flange type shall be of the long-diameter butt-weld type, and the sealing surface shall preferably be of the male-female type. Its pressure rating: the equipment flanges must be at least 1.6 MPa, and the pipe flanges must also be at least 1.6 MPa (when additional bending moments are considered, the value should be at least 2.5 MPa). Try to choose manholes with a smaller nominal diameter ； c) The welded structure of the container shall adopt a fully penetrated design ； d) For the longitudinal weld joints of Class A cylinders in container, a welding test plate shall be prepared for each manufactured product ； e) 100% radiographic or ultrasonic testing shall be conducted on Class A and Class B weld joints of the container. For weld joints where the pipe fitting has a nominal diameter of less than 250 mm is connected to a long-diameter flange or to another pipe fitting, only magnetic particle or penetrant testing is performed. Class C and D weld joints are subject to 100% magnetic particle or penetrant testing ； f) Glass tube level gauges are generally not used for level measurement ； Safety relief devices must use rupture disc assemblies ； g) Non-stainless steel containers shall undergo post-weld stress-relief heat treatment ； h) Conduct a airtightness test after the voltage withstand test is passed. Its test pressure, test medium, and inspection requirements shall be specified in the drawing.
1. Carbon steel and low-alloy steel containers should be heat-treated； 2. Welding test plates need to be prepared ； 3. The thickness of the steel plate used for the housing shall be ≥12 mm, and ultrasonic testing shall be conducted ； 4. 100% surface inspection of container welds ； 5. 100% RT or UT for Class A and B welds
There are too many requirements here as well: material selection, structural design, production of test specimens, choice of gaskets and fasteners, flaw detection, heat treatment, and pressure testing are all necessary
Answer: a) The material used for the equipment must be of grade Q235-C or higher. Welded steel pipes shall not be used for takeover ； b) The flange type shall be of the long-diameter butt-weld type, and the sealing surface shall preferably be of the male-female type. Its pressure rating: the equipment flanges must be at least 1.6 MPa, and the pipe flanges must also be at least 1.6 MPa (when additional bending moments are considered, the value should be at least 2.5 MPa). Try to choose manholes with a smaller nominal diameter ； c) The welded structure of the container shall adopt a fully penetrated design ； d) For the longitudinal weld joints of Class A cylinders in container, a welding test plate shall be prepared for each manufactured product ； e) 100% radiographic or ultrasonic testing shall be conducted on Class A and Class B weld joints of the container. For weld joints where the pipe fitting has a nominal diameter of less than 250 mm is connected to a long-diameter flange or to another pipe fitting, only magnetic particle or penetrant testing is performed. Class C and D weld joints are subject to 100% magnetic particle or penetrant testing ； f) Glass tube level gauges are generally not used for level measurement ； Safety relief devices must use rupture disc assemblies ； g) Non-stainless steel containers shall undergo post-weld stress-relief heat treatment ； h) Conduct a airtightness test after the voltage withstand test is passed. Its test pressure, test medium, and inspection requirements shall be specified in the drawing.