Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here


Hole in Pipeline -Dl DN 600

Hole in Pipeline -Dl DN 600

RE: Hole in Pipeline -Dl DN 600

Bit difficult to tell but looks like a manufacturing defect to me ( slag or similar inclusion)

Or a corrosion hole.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

RE: Hole in Pipeline -Dl DN 600

Is it possible the pipe was dented from outside first, and then corroded?

RE: Hole in Pipeline -Dl DN 600

Dear jithin john,

The pit initiated from the surface that is shown in the photograph. Refracory material is visible. Was it a case of improper refractory application?

Material, service, years, required for further guidance.


Kolkata, India

RE: Hole in Pipeline -Dl DN 600

thank you every one for your replies ,
its a ductile iron pipe with cement lining .DN 600
pressure in pipe around 8-12 bar
flow 500-600 m3/h

the pipe was laid 3 meters below the ground
service ; more than 10 years

recently there was a leak .while trenching we found heavy rocks

RE: Hole in Pipeline -Dl DN 600

Dear jithin john,

Service is water?

Length of pipe?

You are doing the right thing, putting a patch is fine.

Sometimes you weld a box with a valve at 6 o'clock which drains out the water during welding and you close it after you finish welding.


Kolkata, India

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


White Paper - Smart Manufacturing for Semiconductor
New technologies and approaches present great opportunities for semiconductor manufacturers to achieve high levels of innovation, yield and improvement. This white paper explores some of these cutting-edge technologies and how they can be applied effectively in the semiconductor industry. Read about how Smart Manufacturing is transforming the semiconductor industry. Download Now
White Paper - Analysis and Simulation in Aircraft Structure Certification
Organizations using simulation and analysis tools effectively see the benefits in their ability to achieve certification faster and with drastically less total cost than those who do not maximize these tools. Read this White Paper to learn about how digital tools such as analysis and simulation help in aircraft structure certification. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close