1. Problem description and cause analysis.
1 Problem Description.
The installation form of the water mist pipe support and hanger does not meet the requirements of the specification, or the number of supports and hangers is insufficient. [Illustration 1] [Illustration 2].
2 Cause analysis.
The construction unit is not familiar with the construction requirements of the water mist pipeline, and the construction is carried out in accordance with the installation requirements of the ordinary fire water supply pipeline support and hanger.
2. Normative requirements and correct practices.
1 Specification Requirements.
Technical Specification for Water Mist Fire Extinguishing System (GB 50898-2013) Article 33.9 articles. [Figure 3] [Figure 4].
2 Do it right.
3. Countermeasures and prevention and control guidelines.
1. The design unit shall clarify the installation requirements of pipeline supports and hangers in the construction instructions;
2. The construction unit shall, in strict accordance with the specifications and design requirements, deepen the design of the installation form, setting position and layout spacing of the pipeline support and hanger to ensure that the pipeline of the water mist fire extinguishing system is installed firmly and does not produce radial shaking and axial channeling
3. The setting of the anti-swaying bracket can refer to the relevant provisions of the current national standard "Code for Construction and Acceptance of Gas Fire Extinguishing System" GB 50263.
*: Analysis and Prevention Guide for Common Problems of Fire Protection Acceptance of Civil Construction Projects in Jiangsu Province
Technical Specification for Water Mist Fire Extinguishing System (GB 50898-2013).
Article 33.Article 9 The system pipeline shall be fixed on the building components with anti-shaking metal supports and hangers. The support and hanger should be able to withstand the weight and impact of the pipeline when it is filled with water, and its spacing should not be greater than that in Table 33.9.
The support and hanger should be treated with anti-corrosion, and measures should be taken to prevent electrochemical corrosion with the pipeline.
Table 33.9. The spacing of the system pipe support and hanger.