12 Transmission Line Emergencies

Question 1

Transmission lines can range up to _____ and operate at approximately ________.

Answer 1

42” diameter / 1,000 psi

Question 2

Transmission lines measuring 12-42” in diameter use compressors to maintain the pressure needed to keep the gas moving at about 20 mph over thousands of miles. The compressors are generally situated every __________ along the pipeline.

Answer 2

50-100 miles

Question 3

Process of compressing the natural gas raises the temp 7-8 degrees for every _______ of added pressure.

Answer 3

100 psi

Question 4

A minimum of _____ inspection a year is the NG industry standard.

Answer 4

1; The actual number depends on pipelines location, age, and type.

Question 5

Lessons FDs can learn from previous cases:

Answer 5

1. Identify critical and dangerous infrastructure in your area.
2. Use political leaders as planning and response team members
3. Preplan shelter sites
4. Evacuation notice
5. Interactive and hard-copy maps
6. Unified command