Citation Details

Back to citations

Section: 56.13011
Date: 06/24/2011
District: NC
Negligence: Low
Injury or Illness: Unlikely
Injury or illness could be expected to be: Lost Workdays or Restricted Only
Significant and Substantial: No

Condition or Practice: The operator had an air pressure tank with a pressure gauge that was located along an air line past a gate valve. This gauge could not continuously give an accurate reading of the pressure within the tank should the gate valve be closed. At that point when this gate valve is closed the gauge would only be reading the pressure with the air line. A miner not knowing what the accurate air pressure is within the tank could have it rupture resulting in lost work days or restricted duty type injuries. Miner have an outside source check the air compressor unit for safety and did not notice the discrepancy.

Action to Terminate: The operator placed a properly functioning gauge on the end of the tank which will give continuously correct reading of the pressure within the unit.

Why this concerns you: The gauge was in a tee directly after the gate valve that was plumbed into the tank. This compressor/receiver tank plumbing has been in service for many years and inspected multiple times. The only condition that would dictate shutting the valve is when the air system is being serviced or repaired.

Abatement Suggestions From Industry

Take this to contest and argue that the standard does not require continuous monitoring, only 'accurate' monitoring of the pressure in the tank. Open the valve, and the pressure in the tank can be determined. Arguing that the device is not functional unless it is continually performing/measuring can be countered by asking the inspector, at court, about backflow preventers on water systems.

Backflow preventers are required on many water systems, and they must work. However, they are not required to work continuously, ie, you don't have to always run water through a backflow preventer for it to be legal, and more than you have to constantly run air through a pressure gauge for it to be legal.

Same for pressure gauges on compressed gas cylinders. They only accurately monitor the pressure in the tank when the valve is open. Must I retrofit my compressed gas cylinders with a special gauge to read the pressure continuously inside them?
- posted on 06/30/2011

Post a Comment

We have provided a place where you can post your professional comment or add additional information regarding this citation. Before doing so, please read the following guidelines:

Be nice!
If you are angry, step back and take a breath.

Post like you are talking to someone face-to-face. Better yet, post it like your mother is going to read it.

Don't discuss anything that might be construed as restraining trade. Nothing about boycotts and we certainly don't want to read about the price of rock.

Be honest!
Keep it factual. There is absolutely no need to exaggerate; some citations are hard enough to believe as is. Mine safety is important and those who visit the site must be able to rely on posts being accurate.

We review all posts
Sorry, but all posts come to us first. We want this site to be effective, and we want you to use it. The site can only be effective if it is legal and professional. If we get something that isn't both, we won't post it. None of us want that to happen.

No Guarantees
Anyone who has been a mine safety professional for long knows what one inspector approves, another may consider a violation. As much as we would like to, we cannot guarantee any solution offered here will work for your situation. We certainly hope what others have done provides helpful ideas, but we aren't willing to bet the farm on it passing an inspection and you shouldn't either.

Your name and email will not be shown when you post your comment. We ask for these fields because it helps us identify association members and keeps spam off the website.

Your Name

Your Email

Member Of



Any comments or opinions shown on this website reflect the views and opinions of the individuals or organization who posted them and do not necessarily reflect the views of any of the parties sponsoring or supporting this website. The sponsors are not responsible for the content of any comment posted on this website.