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Tube wall thickness depends on the cor-rosiveness of the fluids and their operating pressure & temperature and is specified by Birmingham wire gauge (B.W.G)-a number which varies from 8 to 18 with the numbers 14 and 16 being more commonly used. Outside diameter of tubes varies from about 15 to 50 mm; however a tube of less than __________ mm outside diameter is generally not recommended for fouling fluids. | |
A. | 16 [Wrong Answer] |
B. | 19 [Correct Answer] |
C. | 28 [Wrong Answer] |
D. | 38 [Wrong Answer] |