R&T 2009 - IRC Examples of MOC Triggers - Reindl

7/31/2019 R&T 2009 - IRC Examples of MOC Triggers - Reindl

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Case Descr ip t ionMOC

Requ i red?Yes No

Ex a m p l e s o f Te ch n o l o g y Ch a n g e s

9 Conversion of a glycol system to a direct-refrigerant system9

10 Conversion of a direct-refrigerant system to aglycol system9

11 Conversion of ceiling-hung to penthouse air units 9

12 Conversion of an atmospheric pressure relief vent system to an internal relief system9

13 Replacement of a 100 ton screw compressor with100 ton reciprocating compressor9

Ex a m p l e s o f Eq u i p m e n t Ch a n g e s

14Replacing carbon steel piping with stainless steeltubing

9

15 Replacing an vessel with a larger vesselconstructed of the same material9

16 The addition of a transfer system to a plantcurrently without one9

17 Adding a pump-out connection to a valve group 9

18Replacing a section of 6 schedule 40 A106 hightemperature piping with a 6 schedule 40 A53pipe

9

19The change out of evaporator or condenser fansfrom fixed speed to variable speed

9

20 Changing an air unit from carbon steel tostainless steel9

21

Replacing a Refrigerating Specialties evaporatorpressure regulator (A4A) with a Hansenevaporator pressure regulator (HA4A) of equalsize

9

22Replacing a Hansen hand-expansion valvewith a Refrigerating Specialties hand-expansion valve

9

23Replacing a Hansen H5600A x pressurerelief valve (250 psi set pressure) with a HansenH5600R x pressure relief valve (250 psiset pressure)

9

24 Replacing a clear sight glass with a reflex lenssight glass both of the same material9

25 Replacing a screw compressor (e.g. a FrickRWFII 399) with a factory re-built screw9


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Requ i red?Yes No

compressor on the same package.

26 Adding a Bourdon tube pressure gauge to aregulator temporarily in order to set theregulator

9

27Adding a Bourdon tube pressure gauge to aregulator permanently in order to set theregulator

9

28 Replacement of equipment that is no longermade be the original manufacturer9

29 Large scale replacement of an insulation systemEx a m p l e s o f Pr o c e d u r e a n d Org a n i z a t i o n a l Ch a n g e s

30Re-setting suction pressure control set point butstill within the limits of operation as-defined inthe process safety information

9 9

31Re-setting suction pressure control set point butoutside of the limits of operation as-defined inthe process safety information

9

32 Modifying a standing operating procedure (SOP) 9

33 Revisions to the inspection and test interval foran ammonia detection system9

34 Outsourcing refrigeration operations and/ormaintenance9

35 Reductions of refrigeration staffing levels 9

36Reducing the frequency of preventivemaintenance intervals for refrigerationequipment

9

Ex a m p l e s of c h a n g e s t o Fa ci l i t i e s t h a t c a n i m p a c t a co v e r e dprocess

37 Modifying racking in a warehouse equipped withceiling-hung evaporators9

38 The purchase and use of high lift fork trucks ina refrigerated dock or warehouse9

39 Addition of battery chargers in or adjacent to amachinery room9

40 Addition of a new non-refrigerated process linewithin a plant9

41 Reconfiguring office spaces in a plant 9

42 Addition of an overhead crane in the engineroom9


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Requ i red?Yes No

43

Addition or re-arrangement of equipment within

a plant (if it changes or affects escape paths foremployees)9

O t h e r

44Any changes that are generated as a result of aPHA, incident investigation, general safetyreview, or pre-startup safety review

9

45 Replacement of equipment that is no longermade be the original manufacturer

9

R&T 2009 - IRC Examples of MOC Triggers - Reindl

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