Pressure Testing Equipment

Question 1

Analog gauges should have a full-scale range no more than _________ the nominal test pressure.

Answer 1

2x

Question 2

Test pressures should read in the ________ of the test equipment gauge.

Answer 2

Center half 1/2

Question 3

A pressure recording chart is used under what circumstances?

Answer 3

• Length of pipe is greater than 1000 ‘
• Test duration is 8 hrs
• Test pressure is equal to or greater than 150 PSI

Question 4

All chart recorder reading must be verified with a ______

Answer 4

Pressure gauge

Question 5

Air compressors can generate __________ which may be detrimental to plastic pipe.

Answer 5

High temperature

Question 6

When the hot air from the compressor cools it may cause a decrease in pressure, as long as the pressure remains constant and above the minimum for the minimum test time, this test can be used to validate MAOP and produce a successful test, TRUE or False?

Answer 6

TRUE

Question 7

Before the pressure test is initiated at the required pressure, the test medium must be allowed to what?

Answer 7

Settle, hot compressed air needs to cool or you will see a decrease in pressure during the test period

Question 8

During a pressure test, the temperature of a plastic pipe may not exceed _______ degrees.

Answer 8

100

Question 9

What are two conditions that can lead to higher temperatures in plastic pipe?

Answer 9

• A pressure test of more than 2500’ of pipe
• Continuous compressor use lasting more than 60 minutes

Question 10

What are some way to mitigate high temperatures?

Answer 10

• Use aftercoolers
• Take pauses while using the compressor

Question 11

Steel pipe requires a hoop stress of _____ or more of the specified minimum yield strength (SMYS)

Answer 11

20%

Question 12

What end caps are used for test pressures exceeding 100 PSI?

Answer 12

Welded or Butt-fused End Caps

Question 13

On 2” IPS pipe, when pressure is 150 PSI or less what end caps are used?

Answer 13

Non-bolted, Positive-Restraint Mechanical End Caps

Question 14

When using only pressure gauges for a pressure test, you need to record at least _____ pressure/time readings, one at the start and one at the end of the test period.

Answer 14

Two

Question 15

If a main is not placed in service the next day following a pressure test, how much pressure should be left inside the pipe segment?

Answer 15

30 PSI + / - 3 PSI