Section 215.40  Container Appurtenances

a)         All appurtenances of each system shall be approved.

b)         All appurtenances shall be designed for no less than the maximum working pressure of the portion of the system on which they are installed.  All appurtenances shall be fabricated from materials proved suitable for anhydrous ammonia service.

c)         All connections to containers except connections for pressure relief devices, thermometer well, liquid level gauging devices, or connections fitted with No. 54 (0.055 inches) drill size orifice or those plugged shall have shutoff valves located as close to the container as practical.

d)         Excess flow valves shall close automatically at the rated flows of vapor or liquid as specified by the manufacturer.  The piping, including valves and fittings in the same flow path as the excess flow valve, shall have a greater capacity than the rated flow of the excess flow valve. 

e)         Liquid level gauging devices that require bleeding of the product to the atmosphere and that are so constructed that outward flow will not exceed that passed by a No. 54 (0.055 inches) drill size opening need not be equipped with excess flow valves.

f)          An opening in a container to which a pressure gauge connection is made need not be equipped with an excess flow valve if the opening is not larger than No. 54 (0.055 inches) drill size.

g)         An excess flow or back-pressure check valve, when required in this Section, shall be installed directly in the container opening or a point outside where the line enters the container.  In the latter case the installation shall be made in such a manner that any undue strain beyond the excess flow or back-pressure check valve shall not cause breakage between the valve and the container.

h)         Excess flow valves shall be designed with a by-pass, not to exceed a No. 60 (0.040 inches) drill size opening, to allow equalization of pressure.

i)          Shutoff valves with an integral excess flow valve shall be designed for proper installation in a container opening so that the excess flow valve will close in the event that the valve body, extending above the coupling, is sheared or broken off.

j)          All excess flow valves shall be plainly and permanently marked with the name or trademark of the manufacturer, the catalog number, and the rated capacity.

k)         Each filling connection on non-refrigerated containers shall have a positive shutoff valve in conjunction with either an approved internal back-pressure check valve or an approved internal excess flow valve.  Vapor connections on non-refrigerated containers shall have a positive shutoff valve together with an approved internal excess flow.

(Source:  Amended at 27 Ill. Reg. 9922, effective July 1, 2003)