With the owner’s approval, an alternative leak test is permitted when neither a hydrostatic nor a pneumatic leak test would be possible or safe. An alternative leak test contains the following required elements:
A catastrophic pipe failure during a pneumatic pressure/leak test could result in an explosive release of energy. For example, did you know…
At 4:15 p.m. on December 6, 2021, a contractor, 26, removed transmitters from tanks to winterize the facilities. As the employee removed the bolts and loosened the transmitter from a tank, the contents (50% concentration of Sodium Hydroxide) sprayed out and onto the employee’s eyes, face, head, and chest (upper torso). The employee attempted to
You may remember the 2019 event where the worker left home for the facility to check on an alarm in a pump house. He did not return, so the wife put their children in their child seats and went to the facility to check on her husband. She arrived and found him unconscious inside a
For those new to working in Hazardous Locations (HAZLOCs), the very best resource for the “lay person” is from the US Coast Guard “Drill Down” series. They published eight (8) documents that explains:
On March 4, 2005, Employee #1 (leadman) performed a hydrostatic pressure test on a large stainless steel pressure vessel at a plant manufacturing pressure vessels. The tank was cylindrical, about 14 in. diameter and 24 in. long. The tank was pressurized to 150 number for the test. Upon completing the test, he was draining the
ASME B31.9 requires that utility piping be leak tested BEFORE initial operation. Hydrostatic testing shall be employed when possible. Pneumatic testing may be used instead of hydrostatic testing only under the limitations provided in para. 937.4.
ASME B31.9 covers “utility piping.” The Code DEFINES and QUANTIFIES the phrase “utility piping.” We use this code for utilities associated with our PSM/RMP-covered processes WHEN the utility either PREVENTS, PROTECTS, or MITIGATES an event. Specifically, the code applies to the following services, except as excluded in para. 900.1.3:
We have discussed all the requirements for transferring flammable liquids and gases (i.e., NFPA Flammable “4”); however, I have not mentioned the requirements for transferring TOXIC and HIGHLY TOXIC LIQUIDS that have an NFPA 704 Health Rating of 3 or 4. We see these issues in our Chlorine work where Cl2 is a “utility” to
The question was asked… If the underground piping is protected by a cathodic protection system, does this system need to be turned OFF and Locked Out before workers begin working on the pipe?
On May 3, 2006, Employee #1 was in a trench (approximately 37″ deep and 44 to 46″ wide), digging dirt from around a 10″ diameter PVC water pipeline to locate a water leak. The pipeline was pressurized to approximately 125-130 psi with compressed air.
We have discussed these safety-critical valves extensively here at SAFTENG. I am a huge proponent of these valves, and they are required by most State Fire Codes and RAGAGEPs. Yet, we still find far too many processes handling Highly Hazardous Chemicals/Extremely Hazardous Chemicals that are missing this critical safety feature. As we have also discussed,
