Iowa farmers have been advised by the state agriculture department to check their anhydrous ammonia nurse tanks for pinhole leaks or faulty welds that could undermine the integrity of the tank, because several tanks from American Welding & Tank were found by inspectors to have leaks. But American Welding is insisting that while it’s necessary to inspect tanks regularly, it is not aware of any incidents of serious injury from a pinhole leak in one of the company’s tanks or of any instance in which pinhole leaks led to a rupture or larger release of ammonia.
“Farmers will soon be taking anhydrous tanks out to the field for fall fertilizer applications, so it is important they take the time to look over their tanks and report any leaks to their local provider,” Iowa Secretary of Agriculture Bill Northey warned. “We have been in contact with fertilizer dealers across the state to share our concerns about these tanks, but wanted to share with farmers as well so they can take steps to check their tanks and make sure they are not leaking.”
Northey reported that several tanks from American Welding were found during annual inspections at commercial fertilizer dealers to have leaks. He added that “stop use” orders have been issued on 15 tanks found to be leaking during the inspection. “The department has sent a letter to all anhydrous dealers to share their concerns about the tanks, but wanted to communicate with farmers as well who will soon be starting fall fertilizer applications,” he explained. The U.S. Department of Transportation, which is also responsible for regulation of nurse tanks, has been informed of the findings.
In its statement, American Welding recommended that customary procedures be followed to make sure tanks are properly secured at all times and inspected daily before use for signs of a leak or any other damage, and that users should step away and have the equipment supplier contact the manufacturer. American Welding can be reached toll free at 866-431-8288. “Because anhydrous ammonia is stored under pressure, ice often forms at or around the area of the leak,” AWT cautioned. “If you notice a small patch of ice on the outside of your tank, step away from the tank and contact your equipment supplier, who will contact the manufacturer of the tank.”