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🚫 LF vs IP, Welding Failure!🚫 Poor Fusion? Poor Penetration? Distinguishing in 3 Seconds! 4 years ago

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🚫 LF vs IP, Welding Failure!🚫 Poor Fusion? Poor Penetration? Distinguishing in 3 Seconds!

🎯 Recommended for these people ✅ Welding technician/industrial engineer written/practical exam candidates ✅ Beginners to non-destructive testing (NDT, RT, UT, VT, etc.) ✅ Field welding quality management/QC engineer ✅ Those who want to know the causes of welding defects frequently encountered in the field 👨‍🏭 Today, we will learn about two frequently confused welding defects! The difference between lack of fusion (LF) and incomplete penetration (IP) I have prepared a time to completely conquer them in 3 minutes with a memorization method. If you were wondering, "If both are not welded, what's the difference?", check it out right now! 📚 Key Summary: Summary of the Differences Between LF and IP 🔻 Lack of Fusion (LF) A condition in which the base metal and the weld metal are not properly melted Mostly occurs on the side wall and between beads Causes: Low heat input, unbalanced arc position, base metal oxide film, etc. Phenomenon: Appears to be welded on the surface, but not internally fused → Internal defect 🔻 Incomplete Penetration (IP) A condition in which the weld does not reach the root Mostly occurs in the center and backside of the groove weld Causes: Narrow root gap, excessive root face, narrow angle, insufficient current, etc. Phenomenon: Failure to secure strength due to weld metal not penetrating 💡 Memorization Tip: Let's distinguish by location! **IP is a problem in the center (Root)**, **LF is a problem in the wall (Side wall)**! 📌 Summary of related keywords LF: poor fusion, sidewall defect, arc failure phenomenon IP: poor penetration, root failure, center failure Both ASME, AWS codes have strict allowance standards It is important to secure appropriate current, angle, and opening angle for prevention 📌 Plant Kim So-jang Channel is a knowledge sharing channel that provides practical tips centered on the field to enhance your practical skills. Like 👍 Subscribe ❤️ Notification settings 🔔 Please! We will come back with more tips! Thank you 🙏 ✅ Hashtags #weldingdefect #FusionFailure #IncompletePenetration #LF #IP #LackOfFusion #IncompletePenetration #PlantEducation #WeldingDefect #NDT #VT #RT #UT #RootFailure #SideFailure #weldroot #weldtoe #weldinspection #asme #aws #weldingfailure #pipewelding #weldingtips #weldingquality #PlantLecture #WeldingTechnician #WeldingFunctionalist #PlantKimSoJang #QualityDefect #weldingpractice

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