46 CFR §162.050-17

1. (a)This section contains requirements for test rigs used in approval testing of separators. A diagram of a typical test rig is shown in Figure 162.050-17(a).
2. (b)Each mixture pump on a test rig must—
   1. (1)Be a centrifugal pump capable of operating at 1,000 revolutions per minute or more;
   2. (2)Have a delivery capacity of at least 1.5 times the maximum throughput at which the separator being tested is designed to operate;
   3. (3)Have a maximum delivery pressure that is equal to or greater than the maximum influent pressure at which the separator is designed to operate; and
   4. (4)Have either bypass piping to its suction side or a throttle valve or orifice on its discharge side.
3. (c)The inlet piping of the test rig must be sized so that—
   1. (1)Influent water flows at a Reynolds Number of at least 10,000;
   2. (2)The influent flow rate is between one and three meters per second; and
   3. (3)Its length is at least 20 times its inside diameter.
4. (d)Each sample point on a test rig must meet the design requirements described in Figure 162.050-17(d) and must be in a vertical portion of the test rig piping.