1. 含擋圈端部加強型(浮筒端/管匯端）

End Reinforced with Float Collars (i.e. under Buoy / off PLEM)

2. 含擋圈主線型

Main Line with Float Collars

3. 無擋圈端部加強型(浮筒端/管匯端）

End Reinforced without Float Collars (i.e. under Buoy / off PLEM)

4. 無擋圈主線型

Main Line without Float Collars