3.1 Marker posts

3.1.1 High pressure and ultra-high pressure pipelines (P>1.6 MPa) must be equipped with marker posts

3.1.2 Other pressure grade pipelines can be equipped with marker posts

3.1.3 Marker posts should be made of plastic or other non-metallic conforming materials

3.1.4 The position and spacing of marker posts should comply with the following regulations:

1. The marker post should be installed directly above the pipeline. When used as a corner pile, it should be installed directly above the midpoint of the corner section. When there are no installation conditions above the pipeline, it can be installed in the roadside green belt that is relatively close to the pipeline, and the suitability diagram of the pipe pile can be marked on the marker post as follows

No marker posts shall be set up on fully enclosed and restricted roads

The installation spacing of 3 marker posts should be 100m. In situations where the ground is flat, there are few visible obstacles, and the pipeline route is straight, the installation spacing of marker posts can be greater than 100m. In special areas and accident prone areas, the installation spacing can be shortened

The front of the 4 marker posts should contain warning language and face the road

The shape of the marker post should comply with the following regulations:

1. High pressure and ultra-high pressure pipeline marker posts should be cubic, consisting of piles and pile caps

2. Other pressure grade pipeline marker posts should be triangular columns

The size of the marker post can be selected according to the following regulations

The size of the 1 cube marker post is 150 mm × 150 mm ×  1000 mm

The size of the 2 equilateral triangular column marker post is b × h: 150 mm ×  1000 mm

The content of the 3.1.7 marker post must include the name of the pipeline ownership unit, warning language, and contact phone number.

The content of 3.1.8 marker posts can include marker post number, pressure pipeline usage registration number, pipeline area name, enterprise identification, etc.

The color of the marker post should comply with the following regulations:

The base color of the 1 marker post should be white. The text and numbers on the marker posts should be red.

The top of the 2 marker posts should be orange yellow (Y100M70). The height is 50 mm.

The lower end of the 3 orange yellow should have a 20 mm high reflective tape.

When the marker post is used as a corner pile, an arrow should be used at the top of the marker post for indication. The color of the arrow should be green.

3.1.10 The installation of marker posts should comply with the following regulations:

The foundation of the marker post should be fixed by pouring concrete to ensure stable installation.

2. Marker posts should be installed vertically.

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