×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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

Jobs

Repair of CRA Clad Pipeline

Repair of CRA Clad Pipeline

Repair of CRA Clad Pipeline

(OP)
Hi,

As anybody come across a repair method for a Subsea Corrosion Resistance Alloy [CRA] internal clad pipeline? Please describe your experience.

Rgds Naren

Narendranath R
Pipeline engineering is made easy with state of the art computer software, visit www.narendranath.itgo.com.

RE: Repair of CRA Clad Pipeline

(OP)
This is for planning emergency repair spares. The pipeline could be damaged by anchor drops/pulls or due to corrosion failure at welds etc.

Narendranath R
Pipeline engineering is made easy with state of the art computer software, visit www.narendranath.itgo.com.

RE: Repair of CRA Clad Pipeline

BTW there are some versions (If not Oceaneering, I forget who makes them) with hydraulic actuated sealing and misalignment fittings, etc. usually for deeper water, easier to install with ROVs.

http://virtualpipeline.spaces.msn.com

RE: Repair of CRA Clad Pipeline

(OP)
Split sleeves and Mechanical connectors work well with carbon steel pipeline. Repairs for CRA clad pipeline needs to maintain corrosion resistant after repair.

Narendranath R
Pipeline engineering is made easy with state of the art computer software, visit www.narendranath.itgo.com.

RE: Repair of CRA Clad Pipeline

There should be approved weld and weld repair procedures debeloped at the time of project start-up. If the damage is corrosion failure at a weld then the weld repair procedure should be followed and hyperbaric welding may be necessary.

If its a section of pipeline which has suffered mechanical damage bad enough to require full replacement of the damaged section then have fabrcated a clad pup-piece of sufficient length to replace the damaged area. Then hyperbarically cut the latter and weld in place the pup-piece using the approved weld procedure.

Nigel Armstrong
Karachaganak Petroleum
Kazakhstan

RE: Repair of CRA Clad Pipeline

narenr,

I thought you knew that and were looking for something suitable for an emergency repair.  Not to say that a claded repair clamp could not be developed.  


Nigel,

The clamp system was designed as a more cost effective alternative to divers and hyperbaric welding, but if the water depth allows, why not?

http://virtualpipeline.spaces.msn.com

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!


Resources