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Author Question: A cylinder has DOT 3AL 2015 stamped on it. What does the 3AL stand for? a. Manufacturer's ... (Read 55 times)

SO00

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on: Jul 16, 2018
A cylinder has DOT 3AL 2015 stamped on it. What does the 3AL stand for?
 
  a. Manufacturer's initials
  b. Constructed of heat-treated, high-strength steel
  c. Required to undergo hydrostatic testing every 3 years
  d. Constructed of specially prescribed seam-less aluminum alloys

Question 2

the maximum filling pressure is marked as 2050 lb-force per square inch gauge (psig), this cylin-der is capable of holding _____ psig.
 
  a. 1845 c. 2255
  b. 2050 d. 2460


robbielu01

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Reply #1 on: Jul 16, 2018
Answer to Question 1

ANS: D
3AL means that the cylinder is constructed of specially prescribed seamless aluminum alloys and must be examined every 5 years to test its expansion characteristics. Type 3AA is constructed of heat-treated, high-strength steel.

Answer to Question 2

ANS: C
Compressed gas cylinders should be capable of holding up to 10 more than the maximum fill-ing pressure as marked. 10  2050 = 205 + 2050 = 2255 psig.


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