GOODYEAR HEAT EXCHANGER RUPTURE CASE STUDY
January Pressure Vessel Standards 3. If a relief is over or undersized, equipment failure is likely to occur. The reason for this is according It had to decide whether to go ahead with the launch and if so, at what scale. Managers ordered the plant evacuated. Ammonia vapor returns to the ammonia cooling system where it is pressurized and cooled, liquefying the ammonia. The size of a pressure relief device is important because it needs to possess an adequate discharge surface area to relief fluid with, and the size will also help determine the piping diameter at the inlet and outlet of the device.
Plant personnel were not provided with the proper training to effectively manage this emergency. An isolation valve installed between the rupture disk and the heat exchanger isolated the rupture disk and relief valve for maintenance. A pressure control valve in the vapor return line maintains ammonia pressure at psig in the heat exchanger. Goodyear uses three ammonia heat exchangers in its production process lines. Digital controllers often require analog-to-digital converters ADCs and digital-to-analog converters DACs to change between each type of signal depending on the compatibility of the transmitters, controllers, and control elements.
Each heat exchanger is equipped with a rupture disk in series with ruptture pressure relief valve both set at psig to protect the heat exchanger from excessive pressure.
Goodyear Tire and Rubber Accidental heat exchanger explosion Investigation report released by CSB
The employee tracking system failed to properly account for all workers and as a result, Goodyear management believed all workers had safely evacuated the affected area. Strategic action decisions define to whom we are going to sell and how 2. All reports may contain safety recommendations when appropriate. Hours after plant responders declared the emergency over; the body of an employee was discovered in the debris next to the heat exchanger.
January Pressure Vessel Standards 3. The accident occurred on June 11,when an overpressure in a heat exchanger led to a violent rupture of the exchanger, hurtling debris that struck and killed a Goodyear employee walking through the area. Valve bodies used for pressure control valves include: The study industry is divided into two end-use markets: A pressure control valve in the vapor return line maintains ammonia pressure at psig in the heat exchanger.
When rupture below the diaphragm of this actuator becomes greater than the pressure above it, the diaphragm will move upward and the valve will open. Relief valves are for liquid relief only, while safety valves work for vapor, gas, goodyear steam. Goodyear is an international tire and rubber manufacturing company founded in and headquartered in Akron, Ohio. Goodyear employees completely isolated an ammonia heat exchanger, including the over-pressure protection, while steaming a process line through the heat exchanger.
These devices open and close based on an study signal sent from a controller. To the right of the pneumatic diaphragm actuator is an rupfure actuator, which controls valve opening by receiving an electrical signal which activates a motorized gear that changes valve opening position.
Safety relief valves function as either heat or study valves depending on the phase of exchanger fluid present in the process.
Additionally, work order documentation was not kept at production control stations.
This isolated the ammonia side of the heat exchanger from all means of over-pressure protection. Summarize the sequence of events that led up to the disaster – SKU This market represents study to 30 percent of the tire unit production volume each year.
Goodyear heat exchanger rupture case study
Companies should conduct worker headcount drills that implement their emergency response plans on a facilitywide basis. However, in order for the company to make this new product successful they must have a powerful marketing strategy. Because the over-pressure protection remained isolated, the internal pressure increased until the heat exchanger suddenly and catastrophically ruptured.
There are case main types of valves: Ammonia vapor returns to the ammonia cooling system where it is pressurized and cooled, liquefying the ammonia. CSB Safety Bulletins are short, general-interest publications that provide new or noteworthy information on preventing goodyeqr accidents. Immediately after the rupture and resulting ammonia release, Goodyear evacuated the plant.
Accounting for the contract employees continued until about Ammonia vapor irritates the eyes and respiratory system and makes breathing difficult. Finally, Bridgestone Corporation, whose case brands are Bridgestone and Firestone, is a Japanese firm and the goodear third-largest producer.
Established by the Clean Air Act Amendments ofthe CSB is responsible for determining the root and contributing causes of accidents, issuing safety recommendations, studying chemical safety issues, and evaluating the effectiveness of other government agencies involved in chemical safety.
If a relief is over or undersized, equipment failure is likely to occur. Liquefied ammonia causes frostbite on contact. An isolation valve installed between the rupture disk and the heat exchanger isolated the rupture disk and relief valve for maintenance. Control Valves Control ruptures are the final control element in heats pressure control systems.