pipeline system

Question 1

What is the purpose of the pipeline system?

Answer 1

• carry medical gas from bulk system to point of administration

Question 2

Is there regulation around the use of it?

Answer 2

yes, its government regulated

Question 3

Which standard is applied?

Answer 3

CSA standard Z305.1 (only standard that is legislated)

Question 4

What are the components of the pipeline?

Answer 4

• Seamless copper/brass

- fittings are copper, brass, bronze

Question 5

Where does the main line come from?

Answer 5

• from the bulk system

Question 6

Where does the main riser come from?

Answer 6

• the ascending pipeline that runs from bottom to the top

Question 7

Where does the lateral line come from?

Answer 7

• goes to the patient room on the floor from the main riser

Question 8

Where does the riser and drop come from

Answer 8

• come from the lateral line
  Riser: from ground up
  Drop: Goes down from ceiling

Question 9

What is the wall outlet located?

Answer 9

the end of the pipeline

–>terminal unit

Question 10

What are the safety systems in pipelines?

Answer 10

1) zone valves
2) pressure sensing device
3) pressure warning devices
- –Alarm goes off if there is decrease or increase in pressure (45- 50 psi)

Question 11

What does the initial testing compose of?

Answer 11

1) Lines are filled with dry nitrogen to 1.5 times (75 psi)
- pressure is checked several hours to determine whether it is maintained or not
- > checking leakage

2) purge pipeline and cover all the wall outlets with white cloth to ensure no discoloration –> filter is working
3) 1 set of pipelines are test at a time to ensure no cross-connection (O2, C/A, N2O, N2, vaccum)

Question 12

What is testing after wall are closed composed of?

Answer 12

System verification

• test are repeated
• alarm are tested
• purge gas outlet and analyze its content or purity

Question 13

What is the purpose of wall outlets(terminal unit, station outlet)? How?

Answer 13

• locate at the end of a pipeline, used to dispense gas
• a 1 way valve that allows gas to flow when equipment is connected
  e. g. flowmeters , high pressure hoses that lead to ventilators

Question 14

What are the 2 components of an outlet?

Answer 14

1. Wall plate

2. Keyed outlet

Question 15

What is included in the wall plate?

Answer 15

1) ID, warnings
2) protection for valves
3) locking mechanism or release
- -> each type of flowmeter has unique thread that connect to the outlet that associated with it

Question 16

What are 2 different types of outlet?

Answer 16

1) DISS

2) Quick-release

Question 17

What is the feature of DISS?

Answer 17

• Diameter indexed safety system
• DISS connectors are threaded and have a unique diameter for each type of gas flowmeter/regulator to prevent erroneous connection
• -> mated nut, nipple and seat
• -> # of threads/inch varies between gases
• -> bore size varies

Question 18

How many valves are installed in the medial gas outlet?

Answer 18

2 valves

• outer valve –> primary valve (usually closed)
• inner valve –> secondary valve (usually opened, close when fixing primary valve)

Question 19

Does vaccum outlet has 2 valve?

Answer 19

no, it only has the primary valve