Pressure Testing

Question 1

Pressure testing is accomplished using two different test mediums, liquid and gas. Which one is more dangerous?

Answer 1

Pneumatic testing since it has the potential to explode (measured in TNT).

Question 2

What is used to safely couple hydraulic hoses together?

Answer 2

Whip Check

Question 3

When using a hydrostatic pump, it is imperative that you check the electrical rating, why?

Answer 3

They come in different voltages. Use the rating plate for proper configurations.

Question 4

What components are required to preform a pressure test?

Answer 4

Hoses/fittings, pumps, compressors, pressurized gas cylinders, gauges/recorders.

Question 5

When preforming the test who or what needs to be consulted for the proper execution of the test?

Answer 5

Authority having jurisdiction.

Question 6

When increasing the test pressure, it should be brought up in stages why?

Answer 6

For safety purposes. Check for leaks and reduce damage that may occur as pressure increases.

Question 7

When preforming a hydro test, as much air as possible needs to be vented. True or false?

Answer 7

True, allows you to reach test pressure and reduces chance of explosion.

Question 8

6” pipe 500ft in length pressurized with air to 150lbs of pressure holds the equivalent of what force?

Answer 8

5lbs of TNT

Question 9

What are the hazards of pressure testing?

Answer 9

Flying objects (flanges, valves, gauges, fittings….)
Flying shrapnel (shattered pipe or components from exploding)
Oxygen displacement from inert gas testing
Flooding in areas with electrical
Spills or leaks making ice in the cold

Question 10

What is the purpose of a hydrostatic test on a piping assembly?

Answer 10

To ensure that the system can more than adequately carry its design pressure.

Question 11

What is the most popular method of testing piping systems?

Answer 11

Hydrostatic Test

Question 12

Why is it necessary to install spill pans or other collection devices before a hydrostatic test?

Answer 12

To prevent environmental damage.

Question 13

What should be the maximum pressure rating for a hose used on the discharge of a pressure test pump?

Answer 13

Greater than the maximum rated discharge pressure of the pump.

Question 14

What type of pressure gauge is usually used for pressure testing?

Answer 14

Bourdon Tube

Question 15

What components are used to make up a pressure test harness?

Answer 15

Union, pump shut off valve, pressure bleed valve, pressure gauge, recorder connection outlet.

Question 16

What should be done to prevent a universal coupling from coming apart while in use?

Answer 16

Install a safety pin across the mating halves of the connectors.

Question 17

What determines the maximum output pressure that a 100:1 ratio pneumatic diagram pump is capable of producing?

Answer 17

Input air pressure to the pump.

Question 18

What should the enclosure rating read on an electric motor used to drive a test pump in an area restricted for entry due to the possibility of an explosive or flammable atmosphere?

Answer 18

TEXP

Question 19

What gas may be connected to a set of regulators having a CGA-540 connection?

Answer 19

Oxygen

Question 20

What type of gauge could be used on a line subject to moderate vibration during a hydrostatic test?

Answer 20

Oil filled.

Question 21

What is the primary purpose of a pressure test?

Answer 21

To ensure a component assembly will not fracture under its maximum rated working pressure.

Question 22

What is the minimum time required for a hydrostatic leak test according to the ASME B31 codes?

Answer 22

10 minutes