At the end of this module, you will be able to:
- Define "line break"
- List line break hazards
- Describe isolation methods
- List hot work precautions
- Describe confined space dangers
- Identify proper personal protective equipment to use during a line break
- Describe safe line breaking practices
- Identify the components of the line break permit
The following key questions are answered in this module:
What is a line break?
The opening of a pipe, line, duct, or vessel that contains or has contained hazardous material. This can be an accidental or intentional opening.
What are some line break hazards?
Flammable or combustible materials, oxidizing materials, corrosive materials, toxic materials, carcinogens, very cold materials, very hot materials, pressurized fluids and gases, steam, and strong vacuum.
What should be done before starting a line break?
Making a job plan and getting an approved line break permit.
What does a job plan include?
Reason line break is being made, potential hazards, plan for isolating or clearing line or equipment, PPE needed, personnel roles and responsibilities, and an emergency plan.
Should lockout/tagout procedures be used during a line break?
Yes, follow standard lockout/tagout procedures.
What are four methods for reducing the chances of an accidental release of hazardous materials?
Isolating, venting, draining, and purging.
What are two methods of isolation?
Blanking and double-block and bleed.
Below is a transcript of the video sample provided for this module:
The double block and bleed is a common method of isolation. It involves closing two valves that are upstream from the location of the planned line break and then bleeding out the material between these valves. If the first closed valve malfunctions or leaks, the second closed valve will still protect workers from the material in the line. There are also standalone double block and bleed devices that incorporate the necessary two levels of blocking protection in one device.
Use the additional resources and links below to learn more about this topic:
- U.S. Department of Labor’s Occupational Safety & Health Administration (OSHA) – www.osha.gov
- OSHA eTools - https://www.osha.gov/dep/etools/eprcs/prcsappendices.pdf
- Bodine Services of the Midwest – www.bodineservices.com
- Safety Manual - http://www.bodineservices.com/Safety_Manual/Pages/Lockout.htm#sequence