Sign piles, also known as warning piles, identification piles, and sign piles, are commonly used as route indication signs for buried pipelines in power, communication, gas, tap water, and railways. A new type of product used for outdoor, green belts, shrubs, and pipeline path indication on both sides of top pipes, serving as a warning.

按用途分为：电缆标志桩、油气标志桩、通信标志桩、光缆标志桩、自来水标志桩、铁路标志桩、公路里程桩。主要是根据产品的用途和上面印刷内容分类。

Classified by purpose: cable marker piles, oil and gas marker piles, communication marker piles, optical cable marker piles, tap water marker piles, railway marker piles, and highway mileage piles. Mainly classified based on the purpose of the product and the content printed on it.

按材料可分为：水泥标志桩、塑钢标志桩、复合材料标志桩。复合材料标志桩又分为：菱镁标志桩、玻璃钢标志桩、树脂加沙标志桩、树脂标志桩。

According to materials, it can be divided into cement marker piles, plastic steel marker piles, and composite material marker piles. Composite material marker piles are further divided into: magnesite marker piles, fiberglass marker piles, resin Gaza marker piles, and resin marker piles..

管道标志桩一般用于水、油、气等管道的建设。管道建成后，为了便于对管道的养护和检修，依靠沿线设置的管道标记桩找到管道的准确位置。管道标记桩主要包括转角桩、里程桩、保护测试桩等，穿越铁路、公路、较大河渠、电缆及其他管道处应设置标志桩，对于所有转角都应设置转角桩，管道在线路整处设置长久标志里程桩，有些危险品运输管道的建设过程中，管道标记桩兼作保护测试桩。

Pipeline marker piles are generally used for the construction of water, oil, gas, and other pipelines. After the pipeline is completed, in order to facilitate the maintenance and repair of the pipeline, the accurate position of the pipeline is found by relying on the pipeline marker piles set up along the line. Pipeline marker stakes mainly include corner stakes, mileage stakes, protection test stakes, etc. When crossing railways, highways, large rivers, cables, and other pipelines, marker stakes should be set up. For all corners, marker stakes should be set up. Long term marker mileage stakes should be set up throughout the entire kilometer of the pipeline. In the construction process of some dangerous goods transportation pipelines, pipeline marker stakes also serve as protection test stakes.