Pipefitter Safety Procedures and Codes 2

Question 1

Under OSHA's Process Safety Management (PSM) standard (29 CFR 1910.119), what type of facility is subject to PSM requirements?

Accepted Answer

Facilities that handle highly hazardous chemicals above threshold quantities defined in Appendix A

Answer

OSHA PSM (29 CFR 1910.119) applies to facilities that handle, use, store, or produce highly hazardous chemicals in quantities at or above the threshold quantities listed in Appendix A.

Question 2

What is the minimum air quality requirement for 'safe for entry' into a confined space for oxygen content per OSHA 1910.146?

Accepted Answer

19.5% to 23.5%

Answer

OSHA 1910.146 defines an acceptable atmosphere in a permit-required confined space as having an oxygen concentration between 19.5 percent and 23.5 percent. Below 19.5 percent is oxygen-deficient; above 23.5 percent is oxygen-enriched (increased fire risk).

Question 3

What does ASME B31.3 require for a 'Category D' fluid service piping system regarding leak testing?

Accepted Answer

Initial service leak test (system may be inspected during first pressurization to operating conditions)

Answer

ASME B31.3 Category D fluid service (non-flammable, non-toxic fluid at design pressure 150 psi or less and temperature between -20 and 366 degrees F) permits an initial service leak test rather than requiring a pre-service hydrostatic test.

Question 4

Under OSHA's hot work permit system, which actions are required BEFORE beginning torch cutting on a pipe in an active refinery?

Accepted Answer

Obtain a written hot work permit signed by a responsible individual, verify the area is cleared of flammables, and have a fire watch in place

Answer

OSHA 1910.252(a) and PSM require a written hot work permit for any arc welding, cutting, or grinding that could ignite a fire in hazardous locations, with the permit signed by an authorized person, the area cleared of flammables, and a trained fire watch stationed.

Question 5

What is the purpose of a 'line break permit' when a pipefitter must open an existing in-service piping system?

Accepted Answer

A controlled work authorization that verifies the line is properly isolated, de-pressured, drained, and safe to open before breaking into any piping

Answer

A line break permit (also called a line opening permit) is a work authorization that confirms the piping has been properly isolated, de-pressured, drained or purged, and is safe to open, protecting workers from hazardous fluid or gas release.

Certified Pipefitter Practice Test

Certified Pipefitter Practice Test

Pipefitter Safety Procedures and Codes 2