Emergency Shutdown Valves, Preventive Maintenance 2

[Mohammed Abdalla]

Dear Colleagues,

I believe that this topic ( thread284-215345 ) has been closed without determining any preventive maintenance actions to the ESDVs. could you please assist in determining the preventive maintenance required for the ESDVs?

Your support will be highly appreciated.

 

[gerhardl]

You are correct in your comment that the thread is not conclusive. The reason is that 'emergency shutdown valve' is a general description, and a general description of maintenance would not give a very precise answer.


General: Test and inspect as often as required by any standards or instruction for factory, valve and safety rules valid for the factory. More often proportional to higher risk and cost if failure. No longer between checks than for any other critical or central components at the factory.


Actual physical maintenance will depend on quality, experience, type, construction, materials of valve and actuator and accessories and redundancy in/for the system.

If very critical: One complete ESDV as spare to be changed regulary and inspected, repaired and tested separately.

 

[Mohammed Abdalla]

gerhardl,thank you for the explanations.

Particularly, where can i find a guidance for the partial stroke test of the esdv?

Do you have any ESDV iom to share with me?

 

[gerhardl]

Hi Mohammed Abdalla,

If you want to make a given test of a given valve you would either find test particulars via the original supplier, or, if to a given standard, by the standards' text.

You will anyway have to go to the source with exact technical details and description of the valve, not to an open forum, if you want quality assurance in your work.

Good luck!

 

[danw2]

Natural gas fuel lines for boilers/furnaces/heaters use quick-close Safety Shut-off Valves (SSV) when tripped on loss of combustion flame detection.

In the USA, NFPA 85 is the standard for boilers, NFPA 86 for devices with burners over 400,000 BTU.

Here's a summary of NFPA 86 from the section on Inspection, Testing and Maintenance from a decade ago (NFPA updates on a 4 year interval).

Maxon manufacturers SSVs. Maxon's recommended functional test is described in this document:
Link

 

[Mohammed Abdalla]

gerhardl, Hi!

Thank you for the support.

The problem is that I have the FLOWSERVE ESDVs that appear in the attached photo

, but I am waiting the vendor to send the IOM to check the required planned maintenance. Meanwhile, I want to check the other vendors recommendations for the same type.

If you could support by sending the IOM for other vendors, it will be highly appreciated

 

[gerhardl]

You should not have to wait for the IOM, that is a required standard following each single product of the FLOWSERVE and other quality class products from similar manufacturers.

The vendor, letting you wait for this, is giving a poor service. Complain, and if necessary go direct to the producer, or if not available in your language, ask for the English/US version, or for each components if not ready for the complete assembly.