API 653 Refresher Course - Kishore Karuppaswamy



ASME B 31.3 PROCESS PIPING

Final Exam (Open Book)

1. For calculating reinforcement pad requirements for 24" NB Plant piping the diameter of finished opening for a certain branch is 150 mm and required thickness of header pipe is 10 mm. What will be reinforcement area required?

(a) 750 sq. mm (b) 1,500 sq. mm

(c) 3,000 sq.mm (d) 1,000 sq. mm

2. Suitable rating for pipe flanges (A105) for Design pr = 400 psi, design temp = 400oF will be:

a. 600 lb min

b. 300 lb min

c. 400 lb min

d. None of the above

3. A carbon steel ASTM A 53 Grade B material is being impact tested. What is the minimum average energy requirement for this material (average for 3 specimens-fully deoxidized steel)?

a. 7 ft-lbs

b. 10 ft-lbs

c. 13 ft-lbs

d. 15 ft-lbs

4. Where the design temperature of the system is the same as the hydrostatic test temperature, the hydrostatic test pressure shall not be less than: (Yield stress during hydrotest is not governing factor.)

a. 1.15 times design pressure

b. 1.1 times the design pressure

c. 1.25 times the operating pressure

d. 1.5 times the design pressure

5. A 106 gr B pipe after installation, required pneumatic leak test. Design pr = 300 psi. What is first stage pressure for preliminary check and final test pressure for final check?

a. 150 psi and 330 psi

b. 25 psi and 330 psi

c. 150 psi and 450 psi

d. 25 psi and 450 psi

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