Use two wrenches at bucking up threads.
Keep to the item minimum bend radius.
Avoid excessive round sagging / bending near the fittings, use rigid junctions from the pipes with a strong bend, to avoid pressure in the hose at bending points.
Do not allow off the main centerline (the hose should be in the same plane).
The hose movement and bend should be directed the same plane. Keep off twisting!
Should the hose be exposed to strong dynamic loads, it should be installed as a U-shaped bend.
Choose the correct hose length. When installing, do not allow possible friction with nearby objects