Records must be retained in accordance with ConocoPhillips’ Document Retention Schedule.
POSITIVE ISOLATION
Rev Date: March 2015
Page 7 of 8
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Canada
Appendix A – Definitions
Blind Flange: A flange used to seal off and isolate the open end of a flanged pipe or flanged fitting. It is rated to the
design pressure of the piping system or equipment being isolated.
Blind Skillet/Blank: Also referred to as a blind, steel line blank or paddle blank. This refers to a solid metal plate
engineered and manufactured to form isolation between the faces of two flanges rated to the design pressure of the
piping system or equipment being isolated. These fittings are pressure‐containing devices and they must be
engineered with respect to proper size, thickness, metallurgy and method of manufacture in order to
ensure
integrity.
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