API-577 Exam - Topic 9 Question 14 Discussion

Actual exam question for API's API-577 exam

Question #: 14
Topic #: 9

When performing a carbon steel to carbon steel hot tap where the CE of one of the metals is greater than 0.42%, which of the following electrodes should be used?

AE7048-H4

BE7048

CE7018-A1

DE7018

Show Suggested Answer

Suggested Answer: D

by Alease at Jul 07, 2025, 11:22 AM

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Rickie

3 months ago

Surprised E7018 isn't recommended, thought it was a go-to.

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Harley

3 months ago

I think E7018 would work too, right?

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Gaynell

4 months ago

I disagree, E7018-A1 could be a solid option as well.

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Tawny

4 months ago

Definitely E7048-H4, no doubt about it.

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Chantay

4 months ago

E7048-H4 is the right choice for high CE!

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Latrice

4 months ago

I recall something about E7048 being better for hot taps, especially with a CE over 0.42%. I think that’s what I’d go with.

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Dulce

5 months ago

I’m a bit confused. I know E7018 is commonly used, but I feel like it might not be suitable for this situation.

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Derick

5 months ago

I practiced a similar question, and I believe E7048-H4 is specifically designed for higher CE materials. That might be the right answer.

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Francoise

5 months ago

I think I remember that for higher carbon equivalents, we should be cautious about cracking. E7018 might be a safe choice, but I'm not entirely sure.

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An

5 months ago

Based on the information provided, I believe the correct answer is E7048-H4. The high-hydrogen coating should help manage the higher carbon content.

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Tarra

5 months ago

I'm a bit confused on the difference between the electrode options. I'll need to review the properties of each one to make the best choice.

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Zena

5 months ago

Okay, I remember learning about this in class. I think the key is to use an electrode that can handle the higher carbon content.

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Rashida

6 months ago

Hmm, this seems like a tricky one. I'll need to think carefully about the carbon equivalent (CE) and how that relates to the electrode choice.

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Fatima

7 months ago

E7018? More like E7-NOPE! Gotta go with the H4 for that high-carbon steel, my friends.

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Alica

7 months ago

Is it just me, or does this question have a hint of 'carbon' in it? E7048 all the way!

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Miesha

6 months ago

I agree, E7048 is the best choice for high carbon steel.

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Tamekia

8 months ago

I believe E7048-H4 is the correct electrode to use in this case

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Anglea

8 months ago

I'm not sure, but I think E7018-A1 might also work

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Diane

8 months ago

I agree with Coral, E7018 is the best choice for this scenario

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Filiberto

9 months ago

Hmm, I'd say E7018-A1 for that CE above 0.42%. Sounds like the perfect match to me.

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Vincent

9 months ago

E7048-H4 is the way to go! Gotta handle that high-carbon steel with care.

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Sunny

8 months ago

Using E7048-H4 is crucial for a successful hot tap on high-carbon steel.

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Fausto

8 months ago

I agree, E7048-H4 is designed to handle those high CE levels.

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Osvaldo

8 months ago

E7048-H4 is definitely the best choice for high-carbon steel.

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Coral

9 months ago

I think the correct electrode to use is E7018

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