Good morning to everyone.

I'm new in this world, i start working now in the off-shore (i'm a civil engineer) than i'm trying to learn quickly.

Talking about sealine: if i have a sealine made by pipes API 5L X52 which flanges (ANSI 900? ANSI1500?) i will choose and why? And if the pipes are X65?
I know that many of you will laugh so much reading my question, but thanks to all of them who will answer.

THANKS...waiting for some answer.