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Victaulic Solves Extreme Subsea Condition

Subsea Pipe Preparation with Victaulic Coupling

Victaulic Solves Extreme Subsea Condition

Posted on January 12, 2018

Victaulic(唯特利)解决了海底极端条件的挑战,在创纪录的短时间内帮助圣巴巴拉海水淡化设施重新启动

  • 通过创新解决方案解决了海底管道缺失的挑战,该管道距离海岸 2500 英尺且位于水下 50 英尺
  • 该设施现在可满足整个城市30%的供水需求

在加利福尼亚各地严重干旱的背景下,圣巴巴拉市面临着一个极大的挑战:如何在紧迫的时间,有限的预算和环境的限制下,将其处于备用模式近 20 年的 Charles E. Meyer 海水淡化厂重新启动。

然而,随着工作人员发现系统缺失了一段 8 英尺长 36 英寸海底进水管,且该管段位于距海岸 2500 英尺、水下 50 英尺,这更进一步加重了项目复杂性。该管道于 1992 年工厂进入备用模式时被拆除。

由于进水管需要在项目全面开展之前进行维修,因此留给团队制定解决方案的时间只有短短六个星期。

工程师和承包商首先考虑安装一个不受限的非 Victaulic(唯特利)接头来重新连接缺失的管段,但这需要将其固定在海底,以抑制由80磅/平方英寸(PSI)水下泵产生的拉力。最终,他们决定不采取这种方法,因为这需要在一个环境敏感地区的水下浇注混凝土推力块,这将使本已紧张的日程再延长几周。

Experts turned to Victaulic for an ingenious solution: a grooved high density-polyethylene (HDPE) pipe with a specialized Style 908 coupling specifically designed to quickly join HDPE pipe and eliminate the need for fusing.

在此之前,鉴于传统连接方法中使用的金属材料具有腐蚀性,没有多少工程师使用 HDPE 沟槽管道进行腐蚀性进水,特别是在海水淡化厂中。Victaulic(唯特利)方案为极端的水下环境提供了理想的解决方案。这些产品具有极高的耐用性 - 坚固耐用,足以承受物理环境严苛的操作条件,包括腐蚀风险。产品显著提高了系统的使用寿命,本案例中系统寿命高达100 年。这种方法不仅提高了耐用性和可靠性,同时大大加快了安装速度,比其他相应的熔焊方法快 10 倍之多。

改造动力装置,支持水下管道切槽

To complete the entire installation underwater, Victaulic needed to repurpose its cut grooving (CG) tool so it could groove the pipe end after being submerged. Traditional Victaulic CG tools require electricity and electric motors to run, posing a significant challenge for the team since their target was 50 feet underwater. Victaulic retrofitted a CG3500 tool to run on a hydraulic motor with a hydraulic power unit located on top of the barge, making it the preferred choice to cut and groove the subsea pipes. Once they knew the CG3500 would operate and function properly underwater, Victaulic made additional enhancements to protect the tool from corrosive saltwater before commissioning it to complete the task.

克服在强大洋流中对准管端的挑战

下一个障碍是强大的洋流。由于洋流会将管端拉向不同的方向,专家们意识到要水下对准管端将极其困难。自对准式 908 型接头为此问题提供了快速而独特的解决方案,潜水员直接将两个管端插入该接头,拧紧螺母,完成外壳的螺栓座-螺栓座接触,并确信接头正确安装即可。洋流对安装管道的稳定性也构成了威胁。为了确保管道保持完好且无需维护,Victaulic(唯特利)使用超双相内置加固件的装配接头来加固管端。

能够承受长达 100 年的腐蚀性海水环境

在规划和开发的最后阶段,Victaulic(唯特利)及其工程合作伙伴必须确保设备在暴露于腐蚀性海水后能够保持其强度和耐用性。为了确保 908 型接头能够达到 100 年的水下使用寿命,他们将接头外壳涂上了熔结环氧树脂以消除腐蚀风险,并将 50 磅镀锌阳极固定在壳体上,以提供必要的阴极保护。

总安装时间:2 小时

在驳船上进行了几天的训练和准备之后,到了采取行动的时候了。

一名潜水员带着 CG3500 工具从驳船下潜到海底。管道在短短的 90 分钟内就成功完成开槽。接头在 30 分钟内安装完毕,总安装时间仅用了 2 小时。

该设施现已开始运营,每天可产生 300 万加仑的水量。这相当于每年 3,125 英亩-英尺 (acre-feet) 的水量或城市供水需求的约 30%。

该项目也很好地诠释了为何 Victaulic(唯特利)是极端条件下项目的首选合作伙伴;同时也证明 HDPE 管道可以在创纪录的时间内,在海底环境中完成制备和安装。

To learn more about the products used, click here.

Victaulic(唯特利)

Victaulic(唯特利)

Victaulic is the leading producer of mechanical pipe joining solutions. Engineered with confidence, our solutions put people to work faster, while increasing safety, ensuring reliability and maximizing efficiency.

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