Anhydrous Ammonia Health hazards v Irritant to mucous

Anhydrous Ammonia

Health hazards v Irritant to mucous membranes v Corrosive effects from high v Coughing and bronchial spasms levels 1 a

Health hazards v Edema, strangulation, asphyxia v Rapidly fatal when concentrations are 5, 000 to 10, 000 ppm v Immediately fatal when concentration is greater than 10, 000 ppm 1 b

Health hazards v Chemical burn from vaporization of liquid ammonia v Workers with chronic respiratory problems/sensitivity should avoid ammonia exposure 1 c

Tank preparation for unloading operations v Reliable, v Set trained workers only brake, block wheels 2 a

Tank preparation for unloading operations v Caution • Size signs – At least 12 inches (30 cm) by 15 inches (38 cm) • Material – Metal or comparable material 2 b

Tank preparation for unloading operations v Caution signs • Wording – STOP - Tank Car Connected – STOP - Men at Work • Lettering – White on blue background – At least 3. 9 inches (10 cm) high – Other words at least 2 inches (5 cm) high 2 c

Tank preparation for unloading operations v Tank level car must be substantially 2 d

Unloading tank cars v Do not unload unless consigned for delivery and unloaded on private track v Lading must be piped from car to permanent storage tanks when private track is not available 3 a

Unloading tank cars v Delivery and removal of loaded unit tanks from a tank car DOT 106 A or 110 A is not allowed on carrier tracks v Attendant must be present at all times during unloading, while connections are in place 3 b

Unloading tank cars v Equipment for ammonia service • Pumps • Compressors • Backflow check valves • Excess flow valves 3 c

Unloading tank cars v Connections must be securely attached before unloading starts v Remove unloading connection after completion of loading 3 d

Emergency procedures v Ammonia odor leaks detected by v Know employee procedures in event of a leak 4 a

Emergency procedures v Ammonia is lighter than air • Stay low to the ground, and move upwind 4 b

Emergency procedures v Wear an emergency escape respirator, if available 4 c

Summary of main points v Hazards involved v Preparation tank car v Unloading for unloading of procedures v Emergency procedures 5 a