What is blinding and deblinding? | What is spading and despading?
 |
Blinding and Deblinding procedure |
Blinding means stopping a process flow by placing a properly rated obstruction in a line.
It is the preferred method of positive isolation by stopping the process flow line.
Note:- Blinding is also known as Spading and Deblinding is known as Despading.
If want to see the video of the particular Blinding & Deblinding Procedure please click Here.
Before starts Blinding check the Following…
1. Check the permit is correct for blinding.
2. Get the checklist in which mentioned that the particular line which has to be blind that is properly isolated, drained & depressurized. If not then go for it.
3. Check CTRA that is Critical Task Risk Assessment.
4. The most important thing is the blind list.
Note- Always do blinding according to the list provided by plant Operator or Process Engineer.
Do some Arrangements
1. Always barricade the particular area where you are going to do maintenance activities or Spading & Despading Procedure.
2. Always keep water hose & Fire extinguisher for emergency if some hazard happened during Spading & Despading Procedure.
3. Keep tip tray for collection of fluid which comes during Spading & Despading Procedure.
4. Check your tools properly. Always use brass hammer🔨.
5. Use breathing apparatus if required.
Note- Breathing apparatus is used for safety of dangerous gases like H2S. If H2S gas is more than 15 ppm then you should you Breathing apparatus.
 |
Blinding and de-blinding arrangements |
Let’s Start
1. For blinding & Deblinding procedure always loose bottom side bots of flange. So that if any fluid present in that line that will drained or depressurised properly.
 |
Always loose bottom side bolt first. |
2. Clean the gasket area properly. So that gasket will fix in proper way.
 |
Gasket area of flange |
3. Insert Blind according to instructions like Tale blind, Spectacle blind, End blind or Temporary blind.
4. Insert gasket. Use proper ratings of gasket.
watch a video
5. Tight all the Bolts.
Note- Always tight opposite bolts of flange.
- For Deblinding procedure follow the same instructions.
6. Keep proper Housekeeping.
 |
Housekeeping after blinding and de-blinding |
If want to see the video of the particular Blinding & Deblinding Procedure please click Here.
If you find the article is helpful to you then keep visiting our page for more articles. Our team is highly motivated to work on writing articles according to your demanded topics.
Blinding and De-blinding procedure is the very first process during maintenance or any shutdown activities in refinery, oil & gas or any Engineering, Procurement & Construction industry. You can comment below the topic name which you want to cover in next article our team is constantly working on demands.
Disclaimer- This content keeps copy rights so please don’t try to publish at other places.
You can watch videos here https://youtu.be/2lIbSMJNYKc
Very helpful dear
The post is written in very a good manner and it contains many useful information for me. oil and gas
Positive site, where did u come up with the information on this posting? I'm pleased I discovered it though, ill be checking back soon to find out what additional posts you include. oil and gas
Thanks brother for your appreciation…keep supporting
This comment has been removed by the author.
good article brother
Hey brother i really appreciate you for your comment, why did you remove the comment.
Eldhose Mathew Thank you very much would you like to link my site i will give you backlink
Thanks for the blog loaded with so many information. Stopping by your blog helped me to get what I was looking for. gilgameshindustrial services
Wow! Such an amazing and helpful post this is. I really really love it. It's so good and so awesome. I am just amazed. I hope that you continue to do your work like this in the future also gilgameshindustrial oil and gas