Automation Applications in Bio-Pharmaceuticals

Chapter 3.4 - Steam-In-Place: SIP

SIP Process Description and Challenges

The Steam-In-Place (SIP) System is responsible for repeatedly steaming
areas of product contact, including vessels, flow paths, and sample ports.
This may be done to reduce the bio-burden on the system, or to kill harmful
materials at the end of a batch.

A typical SIP system will ensure that all areas being steamed have been
exposed to live steam for an adequate time to ensure the desired "kill"
effect.

The steam system must be able to measure and control steam temperature,
pressure, and/or flow to ensure adequate steaming. Calculation of Fo
or other measures is often required to meet process needs.

The SIP sequence usually involves the following steps:

  • Path confirmation
  • Purge of non-condensables
  • Steaming
  • Cool-down
  • Hold in steamed state

These sequences are covered in more detail below.

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