fusible plugs Location

[Mohamed]

what is the principle behind the choosing location and distribution of fusible plugs at offshore process area

[ravisasi]

Requirement of fusible plugs and its location is clearly indicated in the API 14J guideline

[Mohamed]

Requirement of fusible plugs and its location is clearly indicated in the API 14J guideline

Very thanks for your help but when i have a look on API 14J Recommended Practice for Design and Hazards Analysis for Offshore Production Facilities i don't found it cover the fusible loop distribution and choosing location.

[f81aa]

Well, the original thread was short-lived.

I could not find in API RP 14J (2001) any guideline regarding to the location of fusible plugs in offshore process area, just a comment of protecting the plugs from mechanical damage, especially in well bays and another one hinting that the plugs are strategically located.

API RP 14G (2007) also mentions that fusible plugs are strategically located and has the remark (Appendix A) "Used in compressor and equipment buildings and areas around production equipment and wellheads".

However, in API RP 14C (2001, reaffirmed 2007) you will find detailed information in Table C-1 (Component, Fusible Plug Arrangement, Minimum Number of Plugs) as well as in different sections.

Regards

[Mohamed]

Well, the original thread was short-lived.

I could not find in API RP 14J (2001) any guideline regarding to the location of fusible plugs in offshore process area, just a comment of protecting the plugs from mechanical damage, especially in well bays and another one hinting that the plugs are strategically located.

API RP 14G (2007) also mentions that fusible plugs are strategically located and has the remark (Appendix A) "Used in compressor and equipment buildings and areas around production equipment and wellheads".

However, in API RP 14C (2001, reaffirmed 2007) you will find detailed information in Table C-1 (Component, Fusible Plug Arrangement, Minimum Number of Plugs) as well as in different sections.


Regards

first we are sorry for closing the threads by the wrong

i look in API RP 14C (2001, reaffirmed 2007) and that exactly that i want , table c-1 cover the guidelines for fusible plug 1nstallations

also brother can guide me to the API cover installing and design considerations for open and close drain system at oil offshore platform

[link Point to another website Only the registered members can access]

[f81aa]

Hi:

I found information related to offshore drainage in the following API documents:

API RP 14C (2001, reaffirmed 2007) “Recommended Practice for Analysis, Design, Installation, and Testing of Basic Surface Safety Systems for Offshore Production Platforms”

API RP 14E (1991) “Recommended Practice for Design and Installation of Offshore Production Platform Piping Systems”

API RP 14J (2001) “Recommended Practice for Design and Hazards Analysis for Offshore Production Facilities”

If you are not constrained to API, there is more information in:

NORSOK
Standard S-001 (2008) "Technical safety" has some information on drains and mentions that the drainage systems shall be designed in accordance with NORSOK P-100 and ISO 13702.

SAUDI ARAMCO
SAES-B-009 (2006) “Fire Protection and Safety Requirements for Offshore Production Facilities”
SAES-S-020 (2006) “Industrial Drainage and Sewers” <<--- very detailed

SHELL
DEP 37.14.10.10-Gen. (February 2011) “Drain systems for offshore installations” <<--- very detailed

BP
RP 44-11 (1992) “Guide to the selection, arrangement and specification of offshore platform drainage” <<--- very detailed

CHEVRON
Guideline 3100 (2001) "Offshore Producing and Drilling Facilities" has some information on Drainage.

I checked up EXXON. The documents I have cover drainage but offshore is out of their scope.

Regards

[Mohamed]

very thanks for this useful survey

[sudharshanan]

Hi,

Regarding the fusible loop installation can anyone guide me on the following?

What is the maximum distance a fusible loop can be?
What are the limitations regarding the response time and length of the fusible loops?
Is there any standard specifying the length, response time and deluge actuation through fusible loop pressure?

Thanks a lot,

Sudharsanan

[f81aa]

Hi sudharshanan:

It seems to me that nobody knows the answers to your questions. I belong to that group; however, I´ll make some comments that, I hope, will help you.

One reliable and widely used method of automatically detecting fires on an offshore platform fires is a pneumatic line containing strategically located fusible elements.

Fusible elements normally are metallic plugs that melt at designed temperature or a section of fusible synthetic tubing. So they are fixed temperature fire detectors.

Fire plugs may be installed in the various pneumatic line of the safety system if the signal generated initiates the proper shuting functions except for equipment required to control the fire. And another use for fire plugs is activating fire control/extinguishing systems.

Regarding your questions:

• What is the maximum distance a fusible loop can be?
• What are the limitations regarding the response time and length of the fusible loops?

I would say that the limitations (distance, response time) are imposed by the constraints of the ESD system.

Now, let´s see your questions in terms of fire control/extinguishing systems:

• What is the maximum distance a fusible loop can be?
• What are the limitations regarding the response time and length of the fusible loops?
• Is there any standard specifying the length, response time and deluge actuation through fusible loop pressure?

NFPA 15 (2007) states in Chapter 10 "System Acceptance", 10.4.2.1 "Under test conditions, the heat detection system, where exposed to a heat source or pilot sprinkler line test valve opened, shall operate the system actuation valve within 40 seconds." So this requirement will have an impact on the length of the fusible loops. Think of the most remote (in hydraulic terms) fire plug being activated.

Most deluge systems provided at process facilities are activated by a heat detection system. Fusible plugs are the simplest, most reliable, and least expensive fire detection and shutdown system commonly used. If you need a faster opening of the deluge valve, you should consider another type of detection such as Ultraviolet and Infrared Flame Detection.

Regards

[sudharshanan]

Thanks f81aa,

Can you give me your contact details to discuss with you furtehr on this?

Sudharsanan