Application of Bulkhead and Water Stop in Marine Pipeline Design

Abstract

Abstract:

The pipe-in-pipe (PIP) insulation pipeline configuration has been widely used in crude oil transportation. We analyze the selection principles of bulkhead and water stop in PIP insulation pipeline design. The structure configuration, installation method, mechanical property and economy are compared between the bulkhead and water stop. Their advantages and disadvantages are given. The selection principles for number and configuration of the bulkheads and water stops are described. Finally, the conclusion is verified in the LF13-2 pipeline replacement project.

Key words: marine pipeline, anchor, water stop, insulation failure length

CLC Number:

TE53

Xu LI, Qing LI, Hu YANG, Xian-hong FENG, Xuan YU. Application of Bulkhead and Water Stop in Marine Pipeline Design[J]. Ocean Engineering Equipment and Technology, 2014, 1(2): 177-179.

项目	锚固件	阻水器
安装形式	通过焊接与海管内外管实现对接	使用专业安装工具,将阻水器套在内管上塞入内外管之间的空隙
内外管相对运动	不能相对错动,可以实现内外管运动耦合	可以相当错动,无法实现内外管耦合
安装成本	大幅增加海管铺设时间及安装成本	对海管铺设及安装成本增加有限
采办费用	高	低
管端锚固件受力状况	可以传递温度应力,减小管道膨胀量,改善管端受力状况	无法传递内外管之间的温度应力,管端受力大,疲劳损伤风险增加
阻水可靠性	安装及阻水性能可靠,不易损坏	结构强度低,在内外管发生错动的情况下可能造成保温失效

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Application of Bulkhead and Water Stop in Marine Pipeline Design

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