API 570 Piping Classes (Onsite vs. Offsite) Flashcards

0
Q

H2, Fuel Gas, Natural Gas

Onsite - Offsite?

A

Class 2

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1
Q

Class of piping with C2-4, H2S, HC (hydrocarbons auto refrigerate, or Boiling point < 50 *F

Onsite - Offsite?

A

Class 1

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2
Q

Hydrocarbons - slowly vaporize (operate > flash point)

Onsite - Offsite?

A

Class 2 (Onsite) - Class 3 (Offsite)

Class 1(over road or water)

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3
Q

Acids & Caustics

Onsite-Offsite?

A
Class 2 (Onsite) - Class 3 (Offsite) 
Class 1 (over road or water)
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4
Q

Hydrocarbons - No significant vaporization, Operate below flashpoint

Onsite - Offsite?

A

Class 3 in both Onsite & Offsite!

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