Application Specification for Identification of Gas Pipeline Facilities

Pipeline road markings

3.1 Marker post

3.1.1 High pressure and ultra-high pressure pipelines (P>1.6 MPa) must be marked with stakes.

3.1.2 Other pressure grade pipelines may be marked with stakes.

3.1.3 Marker posts should be made of plastic or other non-metallic materials that comply with regulations.

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

2) No marker posts shall be set up on fully enclosed restricted roads.

3) The installation spacing of marker posts should be 100m. In the case of flat ground, less obstruction, and straight pipeline routing, the installation spacing of marker posts can be greater than 100m. Special areas and accident prone areas can shorten the installation distance.

4) The front of the marker post should contain warning language and face the road.

3.1.5 The shape of the marker post shall comply with the following regulations:

1) The marker posts for high and ultra-high pressure pipelines should be cubic, consisting of piles and pile caps.

2) The marker posts for other pressure grade pipelines should be triangular columns.

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

1) The size of the cube marker post is 150 mm x 150 mm x 1000 mm.

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

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

3.1.8 The content of the marker post may include the marker post number, pressure pipeline registration number, pipeline area name, enterprise identification, etc.

3.1.9 The color of the marker post shall comply with the following regulations:

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

2) The top of the marker post should be orange yellow (Y100M70). The height is 50 mm. 3) The lower end of the orange yellow color should have a 20 mm high reflective tape.

4) When the marker post is used as a corner post, an arrow should be indicated at the top of the marker post. The color of the arrow should be green. 3.1.10 The installation of marker posts shall comply with the following regulations:

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

2) The marker post should be installed vertically.

3.2 Warning signs

3.2.1 Warning signs should be made of non-metallic composite materials.

3.2.2 Warning signs should be placed in the following locations:

1) Areas where pipeline safety hazards are prone to occur or have occurred multiple times.

2) Pipelines located near industrial buildings, storage yards, and other areas that require enhanced pipeline safety protection.

3.2.3 Warning signs should be placed facing the road for easy observation, 1.5 meters away from the centerline of the pipeline. If the location is on a roadway or sidewalk, it can be set in a relatively close roadside green belt.

3.2.4 The base color of warning signs should be white, and the text and numbers should be red.

The signs in warning signs should be arranged in the order of prohibition, restriction, instruction, warning, and prompt, from left to right and from top to bottom.

3.2.6 The content of warning signs may include warning anchorages, excavation signs, warning language, names of pipeline ownership units, and contact numbers.

3.2.7 The foundation of the warning sign should be fixed with concrete to ensure stable installation.

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