Quadruple , hex, and collar weld

[zacharialamsyah]

Dear all, when I read article about J lay pipe installation I found some terms that I have difficulties to find what the meaning is

1.What is the definitions of quadruple, hex weld or collar weld which are related to J Lay pipe installation? Can someone explain to me with picture?

2.Is the quad or hex weld is related with pipe in pipe (PiP) weld, which is double welded of one pipe is stick together with double welded of other pipe?

Thank you for response and answer

Regards,
Zachari Alamsyah