Installing tumbler tanks
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Published by SALUSRisk Assessment for Installing Tumbler Tanks
Potential Hazards
- Fire and Explosion: Tumbler tanks may store flammable liquids, posing a risk of fire or explosion if not properly managed.
- Static Electricity: The process of filling tanks can generate static electricity, which can ignite flammable vapors.
- Structural Failure: Improper installation can lead to tank collapse or leakage.
- Environmental Contamination: Leaks or spills can contaminate soil and water sources.
- Physical Injury: Handling heavy equipment and materials can result in physical injuries.
Risk Assessment
- Likelihood: Moderate, given the presence of flammable materials and heavy equipment.
- Severity: High, due to potential for fire, explosion, and environmental damage.
Control Measures
- Elimination/Substitution: Use non-flammable liquids if possible.
- Engineering Controls:
- Administrative Controls:
- Implement strict procedures for handling and filling tanks, including grounding and bonding to prevent static discharge.
- Train workers on emergency response and spill containment.
- Personal Protective Equipment (PPE):
- Provide flame-resistant clothing, gloves, and eye protection for workers.
Monitoring and Review
- Regularly inspect tanks and associated piping for leaks or damage.
- Conduct periodic safety audits and drills to ensure compliance with safety protocols.
Recommendations
- Install automatic-closing heat-actuated valves on tanks to prevent flow in case of fire [1].
- Ensure tanks are anchored securely to prevent movement during floods or seismic activity [3].
- Maintain a safe distance from ignition sources, at least 5 feet from any building opening [1].
By implementing these measures, the risks associated with installing tumbler tanks can be significantly reduced, ensuring a safer working environment.
Sources used for this answer
[1] Safety Standards for General Safety and Health Standards (Chaper 296-24 WAC)
Page 130
Open source documentSource excerpt
\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ ground water or flood waters. - (vii) You must ensure that at locations where there is an ample and dependable water supply available, underground tanks containing flammable liquids, so installed that more than 70% of their storage capacity will be submerged at the maximum flood stage, are so anchored, weighted, or secured by other means, as to prevent movement of such tanks when filled with flammable liquids, and submerged by flood waters to the established flood stage. - (viii) You must provide pipe connections below the allowable liquid level in a tank with valves or cocks located as closely as practicable to the tank shell. Such valves and their connections to tanks must be of steel or other material suitable for use with the liquid being stored. You must not use iron. - (ix) At locations where an independent water supply is required, it must be entirely independent of public power and water supply. Independent source of water must be available when flood waters reach a level not less than 10 feet below the bottom of the lowest tank on a property. - (x) You must locate or design self-contained power and pumping unit so that pumping into tanks may be carried on continuously throughout the rise in flood waters from a level 10 feet below the lowest tank to the level of the potential flood stage. - (xi) Capacity of the pumping unit must be such that the rate of rise of water in all tanks must be equivalent to the established potential average rate of rise of flood waters at any stage. - (xii) You must test each independent pumping unit periodically to ensure that it is in satisfactory operating condition. - (xiii) You must ensure that structural guides for holding floating tanks above their foundations are designed so that there will be no resistance t…
[2] Safety Standards for General Safety and Health Standards (Chaper 296-24 WAC)
Page 127
Open source documentSource excerpt
\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ - above 100°F (37.8°C) or Category 4 flammable liquids must terminate outside of the building and higher than the fill pipe opening. Vent outlets must be above normal snow level. They may be fitted with return bends, coarse screens or other devices to minimize ingress of foreign material. - (iv) Vent piping must be constructed in accordance with WAC 296-24-[redacted postal code]. Vent pipes must be laid so as to drain toward the tank without sags or traps in which liquid can collect. You must locate them so that they will not be subjected to physical damage. The tank end of the vent pipe must enter the tank through the top. - (v) When tank vent piping is manifolded, pipe sizes must be such as to discharge, within the pressure limitations of the system, the vapors they may be required to handle when manifolded tanks are filled simultaneously. ## (e) Tank openings other than vents . - (i) Connections for all tank openings must be vapor or liquid tight. - (ii) You must provide openings for manual gauging, if independent of the fill pipe, with a liquid-tight cap or cover. If inside a building, you must protect each such opening against liquid overflow and possible vapor release by means of a spring- loaded check valve or other approved device. - (iii) Fill and discharge lines must enter tanks only through the top. Fill lines must be sloped toward the tank. - (iv) For Category 2 flammable liquids and Category 3 flammable liquids with a flashpoint below 100°F (37.8°C), other than crude oils, gasolines, and asphalts, you must design and install the fill pipes as to minimize the possibility of generating static electricity by terminating within six inches of the bottom of the tank. - (v) You must locate filling and emptying connections which are made and br…
[3] Safety and Health Regulations for Construction (OSHA)
Page 47
Open source documentSource excerpt
## 29 CFR 1926 (OSHA) - (v) Tank openings other than vents. (A) Connections for all tank openings shall be vapor or liquid tight. - (B) Openings for manual gaging, if independent of the fill pipe, shall be provided with a liquid-tight cap or cover. If inside a building, each such opening shall be protected against liquid overflow and possible vapor release by means of a spring loaded check valve or other approved device. - (C) Fill and discharge lines shall enter tanks only through the top. Fill lines shall be sloped toward the tank. - (D) For Category 2 flammable liquids, or Category 3 flammable liquids with a flashpoint below 100 °F (37.8 °C), other than crude oils, gasolines, and asphalts, the fill pipe shall be so designed and installed as to minimize the possibility of generating static electricity by terminating within 6 inches (15.24 cm) of the bottom of the tank. - (E) Filling and emptying connections which are made and broken shall be located outside of buildings at a location free from any source of ignition and not less than 5 feet (1.52 m) away from any building opening. Such connection shall be closed and liquidtight when not in use. The connection shall be properly identified. - (4) Installation of tanks inside of buildings -(i) Location. Tanks shall not be permitted inside of buildings except as provided in paragraphs (e), (g), (h), or (i) of this section. - (ii) Vents. Vents for tanks inside of buildings shall be as provided in paragraphs (i)(2) (iv), (v), (vi)(B), and (3)(iv) of this section, except that emergency venting by the use of weak roof seams on tanks shall not be permitted. Vents shall discharge vapors outside the buildings. - (iii) Vent piping. Vent piping shall be constructed in accordance with paragraph (c) of this section. - (iv) Tank openings other than vents. (A) Connections for all tank openings shall be vapor or liquidtight. Vents are covered in paragraph (i)(4)(ii) of this section. - (B) Each connection to a tank inside of buildi…
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