Chapter 2: Code Calculations - ASME Section 1 Flashcards
Calculate the minimum required thickness for an un-stayed, full-hemispherical head with the pressure on the concave side if the head has the following specifications:
Inside diameter = 1.0 m
Pressure = 1500 kPa
Temperature = 285°C
Plate specification: SA-285 C
The head is fabricated from seamless material and is double butt welded to the shell. All weld reinforcement is removed and has a flanged-in manhole that complies with the code. Use S = 107.
Select one:
A.
13.13 mm
B.
38.45 mm
C.
14.68 mm
D.
28.59 mm
E.
18.46 mm
C.
14.68 mm
A2C02Q12 Using Section I, PG-27, determine the temperature factor y for ferritic stainless steel pipe operating at 510°C.
Select one:
a.
0.7
b.
0.5
c.
0.6
d.
0.4
b.
0.5
A2C02Q01 What is the name for steels with more than 12% chromium?
Select one:
a.
Stainless steel
b.
Tool steel
c.
Mild steel
d.
Cast iron
a.
Stainless steel
A watertube boiler is gas-fired and has 50 m² of boiler heating surface, plus 70 m² of waterwall surface. What is the minimum required relieving capacity for all the PRVs?
Select one:
a.
5452 kg/h
b.
6500 kg/h
c.
9800 kg/h
d.
7910 kg/h
e.
8260 kg/h
d.
7910 kg/h
Calculate the maximum allowable working pressure, in kPa, for a watertube boiler tube, which has an outside diameter of 73.5 mm and a minimum wall thickness of 4.71 mm. The tube is strength-welded into place in the boiler and is located in the furnace area of the boiler. Tube material is carbon steel, SA-192, with a mean wall temperature of 280°C.
Select one:
a.
8.52 MPa
b.
11.54 MPa
c.
10 MPa
d.
22 MPa
e.
6.54 MPa
b.
11.54 MPa
A2C02Q10 Determine the maximum allowable stress for a boiler tube with material SA-209-T1 and a temperature 425°C.
Select one:
a.
110 MPa
b.
106 MPa
c.
113 MPa
d.
103 MPa
d.
103 MPa
Calculate the minimum required wall thickness of a superheater tube. The tube is 100mm in OD and is connected to a header by strength welding. The maximum allowable working pressure is 2430 kPa gauge and the average tube temperature is 350°C. The tube material is alloy steel with specification SA-192. Use S = 81 MPa.
Select one:
a.
5.025 mm
b.
1.58 mm
c.
3.258 mm
d.
1.978 mm
e.
2.897 mm
d.
1.978 mm
A stoker-fired firetube boiler has 62 m² of heating surface. How much steam must the PRVs on this boiler be capable of discharging per hour?
Select one:
a.
1587 kg/h
b.
2815 kg/h
c.
2539 kg/h
d.
3269 kg/h
e.
2108 kg/h
e.
2108 kg/h
Calculate the minimum required wall thickness of a superheater tube. The tube is 76 mm in OD and is connected to a header by strength welding. The maximum allowable working pressure is 4150 kPa gauge and the average tube temperature is 400°C. The tube material is alloy steel, SA-213-T11. Use S = 103 MPa.
Select one:
a.
2.125 mm
b.
1.88 mm
c.
1.5 mm
d.
1.0 mm
e.
0.975 mm
b.
1.88 mm
Calculate the minimum thickness required for a seamless steel feedwater pipe of SA-209, grade T1 material. The outside diameter of the pipe is 323.85 mm, the operating pressure is 5200 kPa, and the temperature is 500°C. The pipe is plain-ended. Assume that the material is austenitic steel. Use S = 72.1.
Select one:
a.
10.37 mm
b.
11.12 mm
c.
9.85 mm
d.
11.27 mm
e.
11.99 mm
d.
11.27 mm
