To: Stephen Crimaudo FW: RFI submitted - Publication [521] Subject: From: Sent: Thursday, March 29, 2012 12:03 PM Standards OnlineApp To: Subject: RFI submitted - Publication [521] A user has submitted a RFI via the RFI website on 03/29/2012 at 11:02 AM Publication Type: API Publication 521 Number: Edition: June 2007 Addendum/Errata: Number: Section 5.20 Vapourdep Referenced: Slug Catcher Subject: Depressurization My company is working on the construction of a Background: gas plant. There is an existing finger-type slug catcher in the Is there any inlet section of requirement to this plant that Question: depressurize this receives a system in case of gas stream fire detection? If Name: Hector from a 30-inch yes, please let pipeline. This me know if the Last Name: Rodriguez slug catcher has criteria are based been designed on API 521, based on ASME Section 5.20, or B31.8 but its Company: VEPICA are there other design pressure criteria for this Phone: 582122043540 is different with case? the incoming pipeline. I have the following Proposed Response: question regarding of It is up to the User to determine not only which equipment is included in the depressuring system, if any, but also the depressurization design of the depressuring system including activation method(s), depressuring rates, etc. system for this part of the plant.
To: Stephen Crimaudo Subject: FW: RFI submitted - Publication [521] From: Sent: Thursday, March 29, 2012 12:03 PM To: Standards OnlineApp Subject: RFI submitted - Publication [521] A user has submitted a RFI via the RFI website on 03/29/2012 at 11:02 AM Publication Type: API Publication Number: 521 Edition: June 2007 Addendum/Errata: Number: Section Referenced: 5.20 Vapourdep Subject: Slug Catcher Depressurization Background: My company is working on the construction of a gas plant. There is an existing finger-type slug catcher in the inlet section of this plant that receives a gas stream from a 30-inch pipeline. This slug catcher has been designed based on ASME B31.8 but its design pressure is different with the incoming pipeline. I have the following question regarding of depressurization system for this part of the plant. Question: Is there any requirement to depressurize this system in case of fire detection? If yes, please let me know if the criteria are based on API 521, Section 5.20, or are there other criteria for this case? Name: Hector Last Name: Rodriguez Company: VEPICA Phone: 582122043540 Proposed Response: It is up to the User to determine not only which equipment is included in the depressuring system, if any, but also the design of the depressuring system including activation method(s), depressuring rates, etc.
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