网络优化资料：

Taboo 1

The pipeline is directly buried in frozen soil or untreated loose soil, and the spacing and location of the pipeline support piers are improper, and even exist in the form of dry bricks.

Result: Because the pipeline support is not firm, it is damaged during the process of backfilling and tamping, resulting in rework and repair.

Method: The pipeline should not be buried in frozen soil or untreated loose soil. The distance between the three-way solenoid valve of the buttress should meet the requirements of the construction specification, and the support pad should be firm, especially the pipe joints, which cannot withstand shearing force. Use cement mortar to build brick buttresses to ensure completeness and firmness.

Taboo 2

The expansion bolt fixing pipe frame is of poor material, the solenoid valve manufacturer installs the expansion bolt hole too large, or the expansion bolt is installed on the brick wall or light wall.

Result: The pipe support is loose, the pipe is deformed, or even falls off.

Method: Expansion bolts must be selected from qualified products, and samples should be inspected if necessary. When installing expansion bolts, the outer diameter of expansion bolts with a hole diameter of not more than 2mm should be used in concrete structures.