This Video Describe Application of Welding Symbols in Fabrication drawings.

Link for Fabrication Industry Useful Mobile Apps:
https://play.google.com/store/search?q=letsfab&c=apps&hl=en

Blogger Link: letsfab.blogspot.com

Facebook Page Link: https://www.facebook.com/Letsfab-160623178076968/

Link for Mobile App:

Ellipsoidal Head Layout:
https://play.google.com/store/apps/details?id=com.pinjara_imran5290.Ellipsoidal_head_layout

Toricone flat Pattern:
https://play.google.com/store/apps/details?id=com.pinjara_imran5290.Toricone_Flat_Pattern

Screw Flight:
https://play.google.com/store/apps/details?id=com.pinjara_imran5290.ScrewFliegh

Pipe Coil Length Calculator:
https://play.google.com/store/apps/details?id=com.pinjara_imran5290.Pipe_Coil_Length_Cal

Tube Expansion Calculator:
https://play.google.com/store/apps/details?id=com.pinjara_imran5290.Tube_Expansion_Calculator

Welding Symbols:
https://play.google.com/store/apps/details?id=com.pinjara_imran5290.Welding_Symbol

Miter Bend Layout:
https://play.google.com/store/apps/details?id=com.pinjara_imran5290.Miter_Bend

Specific Gravity:
https://play.google.com/store/apps/details?id=com.pinjara_imran5290.Specific_Gravity

Link for e-book for fabrication Layout development.
https://www.amazon.in/Fabrication-Layout-Development-Numerical-Methoebookd-/dp/B01MPW1XY6/ref=sr_1_1?ie=UTF8&qid=1518879272&sr=8-1&keywords=fabrication+layout+development.