This issue includes the following articles:
- Setting Up the Fin Section
- Answers from the Doctor: The Real Cause of Edge Splitting and What Remedial Measures Can Be Taken
- Roll-Kraft’s Vice President of Tube Mill Engineering, Robert A. Sladky will be presenting, “Tube and Pipe Mill Set Up” on Wednesday, March 21st. from 10:15AM—12:15PM at Fabtech’s first conference in Canada - Fabtech Canada 2012
- Join Roll-Kraft at Fabtech Canada 2012
- Tech Video: Tube and Pipe Training Seminar
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- Tech Articles
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Setting Up the Fin Section
The primary job of the fin section on any tube or pipe mill is to prepare the edges of the strip (parallel) for welding, and set the body of the tube. The only way this will take place, is if we properly set (work) each and every driven and side pass station in the fin section as per the tooling design and set up chart.
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Symptoms:
We are using hot rolled coils for steel pipe manufacturing. The hot rolled coils are slitted depending upon the pipe diameter and the helix angle calculation. We often encounter edge-like cracking up to 25 mm at slitted edges of hot rolled coils. Edge splitting of slitted coils was also observed.
The slitting problem was encountered in hot rolled coils when these are sent for slitting. Edge-like cracking was observed at slitted coils’ edges before welding.
Kindly advise what could be the real cause of edge splitting and what remedial measures can be taken?
Medicine:
Normally hot roll product is very easy to slit, and results in very few difficulties, especially in regard to cracking.
The first thing to check would be the chemistry of the material itself.
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