Basic Reqir Of Specialty Piping Systems - Part B

Question 1

What variation of NTP thread form was introduced to overcome the problem of spiral leakage

Answer 1

Dry seal threads

Question 2

How is net positive suction head of the transfer pumps in a tank farm maximized.

Answer 2

Pumps are located close to the tank to provide head pressure

Question 3

What process maybe required to internally blast away any surface rust and flaking inside the piping in hydraulic or lube oil system

Answer 3

Line cleaning by hydro blasting

Question 4

What is the purpose if berms and dikes immediately around the tanks

Answer 4

To protect the environment from a tank rupture

Question 5

What is the purpose of using double wall containment system

Answer 5

To protect the environment from a leak in the main line

Question 6

What is the effect af difference I temperature between the process system and the secondary containment system

Answer 6

It creates diggerent rates of expansion and contraction with the corresponding stresses and strains imposed at anchor points between the two systems

Question 7

Why is it less practicable to install a 3”welded elbow inside a 4” casing elbow than it is to install a 4”welded elbow inside a 6” casing elbow

Answer 7

Usually requires more time consuming procedures for assembly

Question 8

What may may be done if it is not practicable to fit a manufactured elbow of the containment pipe system over the elbow of the primary pipe on a welded double pipe system.

Answer 8

Cut and fabricate mittered 90° elbow

Question 9

If the escape of a moderate amount of vapor dose not constitute a hazard, how should the gravity drainage secondary system be vented

Answer 9

To atmosphere on the upstream end of the secondary system.

Question 10

What is done with a fully enclosed containment system to sense product leaks.

Answer 10

Install the probe points in each segment

Question 11

What is the purpose of the weldolets on the clamshell around the flange on a containment pipe

Answer 11

For installation on sensing probes or for the attachment of vent or drain

Question 12

What is used to connect the primary pipe inside a spill tank with the line to the engine or boiler fuel tanks.

Answer 12

A bulkhead fitting through the wall of the spill tank.

Question 13

Where are fully closed containment system required

Answer 13

Where the primary pipe is carrying highly volatile, reactant or toxic fluids

Question 14

What is involved in choosing the best material for a service

Answer 14

Careful consideration of such factors as cost availability, service, life expectancy and practical installation procedures.

Question 15

What is the best way of determining the condition of the hydraulic system and its probable future performance?

Answer 15

By analyzing through hydrolic fluid

Question 16

When should samples be taken from a circulating hydraulic system

Answer 16

When fluid is with In 5°c of operating temp

Question 17

What condition should be maintained when fliching bacterial contamination from

Answer 17

Flush with new flushing oil with oil at 71°c (160°f) minimum and flow rate above 1.22 m/sec (4ft/sec).

Question 18

What may occur if a biocide is added to the oil without performing any of the other cleaning activities.

Answer 18

The biocide will kill the bacteria and release a tremendous biomass that will plug filters, control lines and other equipment.

Question 19

What type ofnpipe thread is designed to eliminate spiral leakage along yhr crest of the threads.

Answer 19

Dryseal

Question 20

What process may be required to internally blast away any surface rust and flaking inside the piping in a hydrolic or lube oil system.

Answer 20

Pickling

Question 21

Which of the following configuration allows for equal annular space between the primary pipe and the elbow fornthe secondary casing with the primary run centered in the casing.

Answer 21

4”LR in 6”SR

Question 22

What is the differences In Temperature between. The process system and the secondary containment system.

Answer 22

Different rates of expansion and contraction impos4 stress at the anchor points.

Question 23

What is the most common spill containment method used for tank farm?

Answer 23

Dyke wall berms banks

Question 24

What is the probable cause of component malfunction, improper valve seating, wear in components and an increase in the response time of servo valves in hydraulic system.

Answer 24

Fluid contamination

Question 25

What would the symptoms of oil film strength loss, rusting and other serious mechanproblems indicate on a circulating lube oil system.

Answer 25

Excessive water

Question 26

What condition in the hydraulic system causes the formation of sludge, gums, carbon or other deposits that clog openings, cause valves and pistons to stick or leak and give poor lubrication to moving parts.

Answer 26

Exposure to excessive heat and pressure

Question 27

What is the most likely cause od a cloud-like film forming below the old level on the inside of an oil reservoir sight glass

Answer 27

Bacterial contamination

Question 28

What should be done to open ends of pipe, tubing, hose fittings if they are to be stored for any considerable period.

Answer 28

Cap or plug with the appropriate fittings

Question 29

What is used to connect the primary pipe inside a spill tank with the line to the engine or boiler fuel tanks.

Answer 29

A bulkhead fitting through the wall of the spill tank