safety and valves
What is the purpose of a valve?
To release pressure out of the bottle
What does a + stamp mean?
You can overfill the bottle by 10%
What does dot stand for?
Department of transportation
What is the name of the part that actually sends the sound out
Transducer
What is the difference between a single a cylinder and a double a
Single A cylinders are tested at a higher standard (they are thicker)
Select the correct answer.
A. aluminum cylinders cannot use teflon tape and are only sealed
B. Aluminum cylinders only use teflon tape on the calves
C. Aluminum cylinders can use both teflon tape and O-Rings for sealing purposes
C
What does the star stamp mean
The test is good for 10 years
What does cga stand for
Compressed gas association
What scan would an C crack appear in and why
Axial. Because a c crack is a horizontal crack
What is the rule with cylinders made before 1946
No star
What kind of valve does an oxygen cylinder use?
Cga 540
What would you stamp on an aluminum cylinder you have tested?
Date rin year UE
What does TC stand for?
(why will we never look at this?)
Transport Canada. We will never look at this because we go by dot standards
Whats the purpose of the water in ue testing?
The purpose of water is to eliminate any air space
What is the max temperature a cylinder can get before its condemned?
(Aluminum and steel)
Aluminum- 350
Steel- 650
What are the rules with Co2 safetys?
Co2 safety can be 3000psi regardless of service pressure. Or the correct pressure it is rated for. There can be some exceptions depending on customer.
What would you stamp on a c25 bottle? And what is the exception to this rule?
C25 cylinders can get a plus and star unless they are pack bottles?
What does tw stand for?
Tear weight
What is the part that send the electronic signal so that the sound can be sent out? (And also receives reflected sound waves and sends it back to the computer)
Pulser/reciever
Where do we stamp a bottle?
Under or near the previous stamp (should have been a free 400 points)
How is the safety of a cylinder calculated? (Hint the same way your test pressure is calculated on most high pressure cylinders.)
5/3 of the service pressure
What is the purpose of a rin stamp?
A rin stamp identifies who tested the cylinder and basically states that this company says that this bottle is good
What does ue stand for
Ultrasonic examination
Explain why each transducer is at a different angle
To ensure any defect is found. As certain angles cannot pick up on certain flaws
How would we figure out if an external pit is too deep and needs to fail visually or if it is not deep enough and good to pass?
Using the pit guage and using calculation on white board