• In: Training | On: Jul 28, 2020

API (SIFE) Pressure Testing Quiz



Our API SOURCE INSPECTOR (SIFE) technical quizzes are compiled to give you an insight into the technical coverage of codes and standards included in the SIFE Body of Knowledge.

Try these five quiz questions about the technical aspects of pressure testing. You can find the answers at the end but have a go at them first!


Qu1. Pressure testing of ASME pipework

According to ASME B31.3 terminology, a pressure test using water at 1.5 x MAWP is called a:


a) Proof test

b) Sensitive leak test

c) Hydraulic test

d) Hydrostatic leak test


Qu2. Test pressures

What pressure would be used for a B31.3 hydrostatic leak test on pipework with a design (MAWP) pressure of 500 psi and a maximum design temperature of 800 degF?


a) It can vary, but definitely less than 500psi

b) 650 psi

c) 750 psi

d) Greater than 750 psi


Qu3. Code-specified test pressures

Test pressures listed in ASME pressure equipment codes are ______.


a) Minimum pressures allowed for the test

b) Maximum pressures allowed for the test

c) Allowed a +/- 3% tolerance

d) Allowed a +/- 10% tolerance


Qu 4: Testing of storage tanks

What is the duration of a full hydrostatic test on a large above-ground cylindrical storage tank?


a) 4 hours

b) 8 hours

c) 24 hours

d) 48 hours


Qu5. Pressure testing temperature

The chances of brittle fracture during hydrostatic testing of a pressure equipment component are minimised by performing the test at what temperature?


a) Below MDMT

b) Above the grain transformation temperature

c) Above the FATT transition temperature

d) Below the FATT transition temperature



Here’s the answers:

Qu 1: Answer (d)

General point from B31.3 terminology


Qu 2: Answer (d)

Hydrotests (called a leak test under B31.3) use the S ratio so for 700DegF the pressure would be higher than 500 x 1.5


Qu 3: Answer (a)

This is the general principle. There are often maximums listed for safety purposes


Qu 4: Answer (c)

Ref API 653


Qu 5: Answer (c)

Above the Ductile-Brittle (Charpy) transition temperature as determined by FATT test. Transformation test is related to Normalising, not impact testing

Testing below MDMT will increase the risk of brittle fracture