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a) The entering of pigs into the system by providing the means to <br />induce flow from an external source, independent of the flows and <br />pressures immediately available from the system, on the back of <br />the pig to develop suffici <br />system. ent pressure to force the pig through the <br />b) A means to control and regulate this flow. <br />c) A means to mo <br />system. nitor the flows and pressures introduced into this <br />d) A means to connect to and subsequently be disconnected from the <br />system without any mechanical dis <br />Of this system, ruption of the operational ability <br />5. As an alternative to item #3 above, other means can be utilized to <br />enter the pigs into the system required for this cleaning procedure. <br />These means can include: <br />a) Hand insertion <br />b) Insertion of the series of <br />system by the use of a pTry <br />ss -required u,to another portion of this <br />diverting of the pirig launching assembly and subsequent <br />pi from that portion of the system into the <br />Portion now to be cleaned. <br />C) Loading of the pigs into the piping as it is being installed for the <br />use once the system is on line. <br />d) Dismantling or opening of the system mechanically to provide <br />access for the insertion of the pigs. <br />NOTE: All of these methods should be done with a close adherence as <br />possible to items b, c, and d, of item #3 above. <br />6• The poly pigs shall be removed or discharged from the system at a <br />point as near to the end of the system as is logistically and <br />mechanically feasible. This discharge point may take the form of a <br />fitting installed into the system specifically for this purpose or may be <br />any line size existing port which can accommodate the reduction <br />capability of the poly pig. This port will serve as a means for the poly <br />Pig to be discharged from the system. <br />7• The poly pigs shall be then entered into a Pig trapping <br />assembly which will allow for the passage or discharge o th the <br />used for the pressurizing of the pig through the system, but will <br />capture or contain the poly pig within this pig trapping assembly and <br />not allow it to proceed. This pig trapping assembly will allow for: <br />a) The discharge of the poly pigs from the system being cleaned by <br />providing the means to control the flow at this point in the system <br />so that the pig must enter the poly pig trap. <br />b) A means to control and regulate this flow. <br />02002-2 <br />