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


Pipeline Welding - Spatter

Pipeline Welding - Spatter

Pipeline Welding - Spatter

Hi to everyone, I'm having a problem with an approved WPS for welding a 18" 7.92mm pipeline.
WPS have SMAW for the root and FCAW-S for the Fill and Cap. The first x-rays showed too many spatter in the bottom, that makes the film impossible to interpret. I know that this is a issue already known when using the SMAW process and not having access to the inside to clean. But now we are having a very big problem... can someone give me some advices?

RE: Pipeline Welding - Spatter

If the problem is spatter inside the pipe from depositing the root bead, and if you are still depositing the root using SMAW, the problem is a change in how the root bead is being deposited. So, the question you need to answer is "What has changed when the welder deposits the root bead?"

Is the welder using the same electrode for the root pass?
Is the welder using the same parameters when depositing the root pass?
Has the configuration of the groove been changed?
Has the root opening or root face been increased or decreased?

If you were getting acceptable results before, but now you are getting unacceptable results, something has changed.

Since the root is deposited with SMAW, the root bbead should be the same as before if there are no changes. Next, ask the welder if the initial weld bead deposited with FCAW is "blasting" through the root bead. In other words, is the welder remelting and burning through the root bead deposited with SMAW?

Best regards - Al

RE: Pipeline Welding - Spatter

We are just starting. Those were the first welds.

RE: Pipeline Welding - Spatter

See my response in the ASME section

RE: Pipeline Welding - Spatter

Could the amperage be set too high?


RE: Pipeline Welding - Spatter

WPS specify 90-140A. They were using 120A more or less. The 4.0 rods are specified for 120-180A.
It's very strange that they can't do the work with the approved WPS.

RE: Pipeline Welding - Spatter

Excessive spatter is usually associated with high voltage and that is then related to excessive arc length.
Are they welding vertical up or down ?

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!


Research Report: State of IoT Adoption in Product Development 2019
This research report, based on a survey of 234 product development professionals, examines the current state of Internet of Things (IoT) adoption by product design teams, its perceived importance, and what features and capabilities teams consider important when making decision about adding IoT functionality to their products. Download Now
Research Report: Augmented Reality for Maintenance, Repair and Overhaul (MRO)
The term Industry 4.0 denotes a cluster of technologies that’s poised to fundamentally reshape manufacturing and bring about a new industrial revolution. These include 3D printing (AM), the Industrial Internet of Things (IIoT), artificial intelligence (AI) and mixed reality technologies, more commonly known as virtual reality (VR) and augmented reality (AR). 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