Steamfitter Safety Regulations and Compliance 3 — Questions and Answers
Question 1: Under the OSHA Process Safety Management (PSM) standard (29 CFR 1910.119), which condition typically triggers PSM coverage for a steam system?
- Any boiler exceeding 100 HP
- Use of highly hazardous chemicals above threshold quantities (Correct answer)
- Steam pressure above 150 psig in any piping
- Systems with more than 500 feet of pipe
Correct answer: Use of highly hazardous chemicals above threshold quantities
PSM (29 CFR 1910.119) applies when highly hazardous chemicals (including certain flammables) are present at or above OSHA-specified threshold quantities.
Question 2: Which NFPA code specifically addresses installation of steam and hot water heating systems in buildings?
- NFPA 13
- NFPA 31
- NFPA 54
- NFPA 85 (Correct answer)
Correct answer: NFPA 85
NFPA 85 (Boiler and Combustion Systems Hazards Code) governs the safe design and operation of boiler systems including steam generation equipment.
Question 3: A steamfitter is required to wear a supplied-air respirator. Under OSHA 1910.134, what must occur before first use?
- A 30-minute trial wear period on the job
- Medical evaluation and fit testing (Correct answer)
- Supervisor approval only
- Annual retraining every 12 months
Correct answer: Medical evaluation and fit testing
OSHA 1910.134 requires medical evaluation to ensure the worker can safely wear a respirator and fit testing to confirm the respirator seals properly.
Question 4: What is the primary purpose of a safety relief valve on a steam system, and what code governs its sizing?
- Control normal operating pressure; ASME B16.34
- Prevent overpressure beyond MAWP; ASME BPVC Section I (Correct answer)
- Reduce energy consumption; ASHRAE 90.1
- Prevent water hammer; ASME B31.1
Correct answer: Prevent overpressure beyond MAWP; ASME BPVC Section I
Safety relief valves protect against overpressure by opening before system pressure exceeds MAWP, and must be sized per ASME BPVC Section I.
Question 5: Per OSHA regulations, what is the maximum permissible noise exposure level for an 8-hour workday without hearing protection?
- 75 dBA
- 85 dBA
- 90 dBA (Correct answer)
- 95 dBA
Correct answer: 90 dBA
OSHA 29 CFR 1910.95 sets the permissible exposure limit at 90 dBA for an 8-hour time-weighted average without required hearing protection.
Question 6: Which pipe marking system per ASME A13.1 identifies steam supply piping?
- Blue label with white text
- Yellow label with black text (Correct answer)
- Green label with white text
- Red label with white text
Correct answer: Yellow label with black text
ASME A13.1 designates flammable and oxidizing materials (including steam) with yellow labels and black text to indicate hazardous contents.
Question 7: What does a Job Hazard Analysis (JHA) require workers to identify before beginning a steamfitting task?
- The cost estimate for the task
- Potential hazards and corresponding controls for each work step (Correct answer)
- The names of all workers on the crew
- The manufacturer of each fitting used
Correct answer: Potential hazards and corresponding controls for each work step
A JHA systematically examines each step of a job to identify hazards and establish controls before work begins, reducing injury risk.
Steamfitter Safety Regulations and Compliance 3
Under the OSHA Process Safety Management (PSM) standard (29 CFR 1910.119), which condition typically triggers PSM coverage for a steam system?