SlideShare a Scribd company logo
Teori inspeksi Las-lasan
menggunakan Ultrasonik
Teori Inspeksi Las-lasan
• Tipe-tipe Discontinuity
– Porosity, Lack of Fusion, Incomplete Penetration, Slag
Inclusions, Toe Cracks, Root Cracks, Laminasi
• Teknik Inspeksi
– Inspeksi dengan Probe Normal/Straight Beam
– Inspeksi dengan Probe Sudut/Angle Beam
Lack of Fusion
Porosity Slag Inclusions
Incomplete Penetration
Toe Crack
Root Crack
Types of Discontinuities
Cacat Las-lasan (Tampilan Cross-Sectional)
Lack of Fusion
Slag
Lack of Penetration
Crack
Memeriksa dengan Straight Beam/Probe Normal
• Menghasilkan sebuah gelombang longitudinal pada
keadaan normal
• Mendeteksi Laminasi didalam atau didekat daerah
yg dipengaruhi oleh panas
• Memeriksa dengan Probe Normal/Straight beam
biasanya dilakukan di daerah sambungan
digabung dengan pemeriksaan dengan probe
sudut/angle beam karena tidak ada metode yg
dapat mencari semua jenis cacat dengan satu
metode saja.
Memeriksa Laminasi menggunakan Straight Beam/Probe Normal
Multiple echoes di kedalaman yg berbeda-beda
Mengindikasikan adanya laminasi
Berkurangnya amplitude echo
Mengindikasikan adanya laminasi
Memeriksa dengan Straight Beam/Probe Normal
Memeriksa Laminasi menggunakan Angle Beam/Probe Sudut
Laminasi tidak terdeteksi dengan inspeksi menggunakan angle beam
 Tidak ada Cacat
• Suara merambat melewati material dan dipantulkan kembali.
Backwall Echo
Memeriksa dengan Straight Beam/Probe Normal
 Ada Cacat
• Beberapa suara merambat melewati seluruh material dan
dipantulkan kembali, sementara beberapa dipantulkan kembali
karena adanya cacat.
• Echo amplitude berhubungan dengan ukuran cacat.
Flaw
Echo
Backwa
ll
Echo
Flaw
Memeriksa dengan Straight Beam/Probe Normal
Memeriksa dengan Angle Beam/Probe Sudut
• Prinsip pembiasan dan mode konversi menghasilkan
gelombang shear atau longitudinal di test material.
• Dapat juga menginspeksi pada: Root, Sidewall, Crown, Heat
Effected Zones
• Las-lasan “crown” dan orientasi cacat tidak dapat
menggunakan teknik straight beam/probe normal.
Weld Scanning Technique
• Komponen Angle Beam/Probe Sudut:
• R = Sudut Bias
• LEG = T/(Cos R)
• T = Tebal Material
• V-Path = 2T/(Cos R)
• Skip Distance = 2T x Tan R
Skip Distance
Or
V-Path
T
Beam Index Point
Memeriksa dengan Angle Beam/Probe Sudut
• Surface Distance = Sin R x Soundpath
• Depth (1st Leg) = Cos R x Soundpath
• Depth (2nd Leg) = 2T-[Cos R x Soundpath]
Surface Distance
Or T
Depth
Reflector Components
Memeriksa dengan Angle Beam/Probe Sudut
• Komponen Angle Beam/Probe Sudut:
Aplikasi Angle Beam/Probe Sudut
Gerakkan probe maju dan mundur untuk scan sampai ke sisi
bawah las-lasan dan disepanjang las-lasan
Teknik Scanning Las-lasan
Weld Scanning Technique
Weld Scanning Technique
Aplikasi Angle Beam/Probe Sudut
Las-lasan yg Bagus
(Tidak ada Suara yg dipantulkan)
Weld Scanning Technique
Weld Scanning Technique
Tidak ada Tampilan Echo
Aplikasi Angle Beam/Probe Sudut
Las-lasan yg Tidak Bagus
(Pantulan dari lubang yg ada didalam)
Weld Scanning Technique
Weld Scanning Technique
LUBANG
“Penghitung Sound Path”
Menunjukkan lokasi cacat
Echo Cacat

More Related Content

Featured

Skeleton Culture Code
Skeleton Culture CodeSkeleton Culture Code
Skeleton Culture Code
Skeleton Technologies
 
PEPSICO Presentation to CAGNY Conference Feb 2024
PEPSICO Presentation to CAGNY Conference Feb 2024PEPSICO Presentation to CAGNY Conference Feb 2024
PEPSICO Presentation to CAGNY Conference Feb 2024
Neil Kimberley
 
Content Methodology: A Best Practices Report (Webinar)
Content Methodology: A Best Practices Report (Webinar)Content Methodology: A Best Practices Report (Webinar)
Content Methodology: A Best Practices Report (Webinar)
contently
 
How to Prepare For a Successful Job Search for 2024
How to Prepare For a Successful Job Search for 2024How to Prepare For a Successful Job Search for 2024
How to Prepare For a Successful Job Search for 2024
Albert Qian
 
Social Media Marketing Trends 2024 // The Global Indie Insights
Social Media Marketing Trends 2024 // The Global Indie InsightsSocial Media Marketing Trends 2024 // The Global Indie Insights
Social Media Marketing Trends 2024 // The Global Indie Insights
Kurio // The Social Media Age(ncy)
 
Trends In Paid Search: Navigating The Digital Landscape In 2024
Trends In Paid Search: Navigating The Digital Landscape In 2024Trends In Paid Search: Navigating The Digital Landscape In 2024
Trends In Paid Search: Navigating The Digital Landscape In 2024
Search Engine Journal
 
5 Public speaking tips from TED - Visualized summary
5 Public speaking tips from TED - Visualized summary5 Public speaking tips from TED - Visualized summary
5 Public speaking tips from TED - Visualized summary
SpeakerHub
 
ChatGPT and the Future of Work - Clark Boyd
ChatGPT and the Future of Work - Clark Boyd ChatGPT and the Future of Work - Clark Boyd
ChatGPT and the Future of Work - Clark Boyd
Clark Boyd
 
Getting into the tech field. what next
Getting into the tech field. what next Getting into the tech field. what next
Getting into the tech field. what next
Tessa Mero
 
Google's Just Not That Into You: Understanding Core Updates & Search Intent
Google's Just Not That Into You: Understanding Core Updates & Search IntentGoogle's Just Not That Into You: Understanding Core Updates & Search Intent
Google's Just Not That Into You: Understanding Core Updates & Search Intent
Lily Ray
 
How to have difficult conversations
How to have difficult conversations How to have difficult conversations
How to have difficult conversations
Rajiv Jayarajah, MAppComm, ACC
 
Introduction to Data Science
Introduction to Data ScienceIntroduction to Data Science
Introduction to Data Science
Christy Abraham Joy
 
Time Management & Productivity - Best Practices
Time Management & Productivity -  Best PracticesTime Management & Productivity -  Best Practices
Time Management & Productivity - Best Practices
Vit Horky
 
The six step guide to practical project management
The six step guide to practical project managementThe six step guide to practical project management
The six step guide to practical project management
MindGenius
 
Beginners Guide to TikTok for Search - Rachel Pearson - We are Tilt __ Bright...
Beginners Guide to TikTok for Search - Rachel Pearson - We are Tilt __ Bright...Beginners Guide to TikTok for Search - Rachel Pearson - We are Tilt __ Bright...
Beginners Guide to TikTok for Search - Rachel Pearson - We are Tilt __ Bright...
RachelPearson36
 
Unlocking the Power of ChatGPT and AI in Testing - A Real-World Look, present...
Unlocking the Power of ChatGPT and AI in Testing - A Real-World Look, present...Unlocking the Power of ChatGPT and AI in Testing - A Real-World Look, present...
Unlocking the Power of ChatGPT and AI in Testing - A Real-World Look, present...
Applitools
 
12 Ways to Increase Your Influence at Work
12 Ways to Increase Your Influence at Work12 Ways to Increase Your Influence at Work
12 Ways to Increase Your Influence at Work
GetSmarter
 
ChatGPT webinar slides
ChatGPT webinar slidesChatGPT webinar slides
ChatGPT webinar slides
Alireza Esmikhani
 
More than Just Lines on a Map: Best Practices for U.S Bike Routes
More than Just Lines on a Map: Best Practices for U.S Bike RoutesMore than Just Lines on a Map: Best Practices for U.S Bike Routes
More than Just Lines on a Map: Best Practices for U.S Bike Routes
Project for Public Spaces & National Center for Biking and Walking
 
Ride the Storm: Navigating Through Unstable Periods / Katerina Rudko (Belka G...
Ride the Storm: Navigating Through Unstable Periods / Katerina Rudko (Belka G...Ride the Storm: Navigating Through Unstable Periods / Katerina Rudko (Belka G...
Ride the Storm: Navigating Through Unstable Periods / Katerina Rudko (Belka G...
DevGAMM Conference
 

Featured (20)

Skeleton Culture Code
Skeleton Culture CodeSkeleton Culture Code
Skeleton Culture Code
 
PEPSICO Presentation to CAGNY Conference Feb 2024
PEPSICO Presentation to CAGNY Conference Feb 2024PEPSICO Presentation to CAGNY Conference Feb 2024
PEPSICO Presentation to CAGNY Conference Feb 2024
 
Content Methodology: A Best Practices Report (Webinar)
Content Methodology: A Best Practices Report (Webinar)Content Methodology: A Best Practices Report (Webinar)
Content Methodology: A Best Practices Report (Webinar)
 
How to Prepare For a Successful Job Search for 2024
How to Prepare For a Successful Job Search for 2024How to Prepare For a Successful Job Search for 2024
How to Prepare For a Successful Job Search for 2024
 
Social Media Marketing Trends 2024 // The Global Indie Insights
Social Media Marketing Trends 2024 // The Global Indie InsightsSocial Media Marketing Trends 2024 // The Global Indie Insights
Social Media Marketing Trends 2024 // The Global Indie Insights
 
Trends In Paid Search: Navigating The Digital Landscape In 2024
Trends In Paid Search: Navigating The Digital Landscape In 2024Trends In Paid Search: Navigating The Digital Landscape In 2024
Trends In Paid Search: Navigating The Digital Landscape In 2024
 
5 Public speaking tips from TED - Visualized summary
5 Public speaking tips from TED - Visualized summary5 Public speaking tips from TED - Visualized summary
5 Public speaking tips from TED - Visualized summary
 
ChatGPT and the Future of Work - Clark Boyd
ChatGPT and the Future of Work - Clark Boyd ChatGPT and the Future of Work - Clark Boyd
ChatGPT and the Future of Work - Clark Boyd
 
Getting into the tech field. what next
Getting into the tech field. what next Getting into the tech field. what next
Getting into the tech field. what next
 
Google's Just Not That Into You: Understanding Core Updates & Search Intent
Google's Just Not That Into You: Understanding Core Updates & Search IntentGoogle's Just Not That Into You: Understanding Core Updates & Search Intent
Google's Just Not That Into You: Understanding Core Updates & Search Intent
 
How to have difficult conversations
How to have difficult conversations How to have difficult conversations
How to have difficult conversations
 
Introduction to Data Science
Introduction to Data ScienceIntroduction to Data Science
Introduction to Data Science
 
Time Management & Productivity - Best Practices
Time Management & Productivity -  Best PracticesTime Management & Productivity -  Best Practices
Time Management & Productivity - Best Practices
 
The six step guide to practical project management
The six step guide to practical project managementThe six step guide to practical project management
The six step guide to practical project management
 
Beginners Guide to TikTok for Search - Rachel Pearson - We are Tilt __ Bright...
Beginners Guide to TikTok for Search - Rachel Pearson - We are Tilt __ Bright...Beginners Guide to TikTok for Search - Rachel Pearson - We are Tilt __ Bright...
Beginners Guide to TikTok for Search - Rachel Pearson - We are Tilt __ Bright...
 
Unlocking the Power of ChatGPT and AI in Testing - A Real-World Look, present...
Unlocking the Power of ChatGPT and AI in Testing - A Real-World Look, present...Unlocking the Power of ChatGPT and AI in Testing - A Real-World Look, present...
Unlocking the Power of ChatGPT and AI in Testing - A Real-World Look, present...
 
12 Ways to Increase Your Influence at Work
12 Ways to Increase Your Influence at Work12 Ways to Increase Your Influence at Work
12 Ways to Increase Your Influence at Work
 
ChatGPT webinar slides
ChatGPT webinar slidesChatGPT webinar slides
ChatGPT webinar slides
 
More than Just Lines on a Map: Best Practices for U.S Bike Routes
More than Just Lines on a Map: Best Practices for U.S Bike RoutesMore than Just Lines on a Map: Best Practices for U.S Bike Routes
More than Just Lines on a Map: Best Practices for U.S Bike Routes
 
Ride the Storm: Navigating Through Unstable Periods / Katerina Rudko (Belka G...
Ride the Storm: Navigating Through Unstable Periods / Katerina Rudko (Belka G...Ride the Storm: Navigating Through Unstable Periods / Katerina Rudko (Belka G...
Ride the Storm: Navigating Through Unstable Periods / Katerina Rudko (Belka G...
 

Inspeksi Las-lasan.ppt

  • 2. Teori Inspeksi Las-lasan • Tipe-tipe Discontinuity – Porosity, Lack of Fusion, Incomplete Penetration, Slag Inclusions, Toe Cracks, Root Cracks, Laminasi • Teknik Inspeksi – Inspeksi dengan Probe Normal/Straight Beam – Inspeksi dengan Probe Sudut/Angle Beam Lack of Fusion Porosity Slag Inclusions Incomplete Penetration Toe Crack Root Crack Types of Discontinuities
  • 3. Cacat Las-lasan (Tampilan Cross-Sectional) Lack of Fusion Slag Lack of Penetration Crack
  • 4. Memeriksa dengan Straight Beam/Probe Normal • Menghasilkan sebuah gelombang longitudinal pada keadaan normal • Mendeteksi Laminasi didalam atau didekat daerah yg dipengaruhi oleh panas • Memeriksa dengan Probe Normal/Straight beam biasanya dilakukan di daerah sambungan digabung dengan pemeriksaan dengan probe sudut/angle beam karena tidak ada metode yg dapat mencari semua jenis cacat dengan satu metode saja.
  • 5. Memeriksa Laminasi menggunakan Straight Beam/Probe Normal Multiple echoes di kedalaman yg berbeda-beda Mengindikasikan adanya laminasi Berkurangnya amplitude echo Mengindikasikan adanya laminasi Memeriksa dengan Straight Beam/Probe Normal Memeriksa Laminasi menggunakan Angle Beam/Probe Sudut Laminasi tidak terdeteksi dengan inspeksi menggunakan angle beam
  • 6.  Tidak ada Cacat • Suara merambat melewati material dan dipantulkan kembali. Backwall Echo Memeriksa dengan Straight Beam/Probe Normal
  • 7.  Ada Cacat • Beberapa suara merambat melewati seluruh material dan dipantulkan kembali, sementara beberapa dipantulkan kembali karena adanya cacat. • Echo amplitude berhubungan dengan ukuran cacat. Flaw Echo Backwa ll Echo Flaw Memeriksa dengan Straight Beam/Probe Normal
  • 8. Memeriksa dengan Angle Beam/Probe Sudut • Prinsip pembiasan dan mode konversi menghasilkan gelombang shear atau longitudinal di test material. • Dapat juga menginspeksi pada: Root, Sidewall, Crown, Heat Effected Zones • Las-lasan “crown” dan orientasi cacat tidak dapat menggunakan teknik straight beam/probe normal. Weld Scanning Technique
  • 9. • Komponen Angle Beam/Probe Sudut: • R = Sudut Bias • LEG = T/(Cos R) • T = Tebal Material • V-Path = 2T/(Cos R) • Skip Distance = 2T x Tan R Skip Distance Or V-Path T Beam Index Point Memeriksa dengan Angle Beam/Probe Sudut
  • 10. • Surface Distance = Sin R x Soundpath • Depth (1st Leg) = Cos R x Soundpath • Depth (2nd Leg) = 2T-[Cos R x Soundpath] Surface Distance Or T Depth Reflector Components Memeriksa dengan Angle Beam/Probe Sudut • Komponen Angle Beam/Probe Sudut:
  • 11. Aplikasi Angle Beam/Probe Sudut Gerakkan probe maju dan mundur untuk scan sampai ke sisi bawah las-lasan dan disepanjang las-lasan Teknik Scanning Las-lasan Weld Scanning Technique Weld Scanning Technique
  • 12. Aplikasi Angle Beam/Probe Sudut Las-lasan yg Bagus (Tidak ada Suara yg dipantulkan) Weld Scanning Technique Weld Scanning Technique Tidak ada Tampilan Echo
  • 13. Aplikasi Angle Beam/Probe Sudut Las-lasan yg Tidak Bagus (Pantulan dari lubang yg ada didalam) Weld Scanning Technique Weld Scanning Technique LUBANG “Penghitung Sound Path” Menunjukkan lokasi cacat Echo Cacat