It is not allowed, every construction unit understands this.
"Urban Gas Design Code" GB 50028-2006
1O. 2.38 When indoor gas pipelines pass through load-bearing walls, floors or slabs, steel casings must be added. The pipes in the casings must not have joints. The gaps between the casings and load-bearing walls, floors or slabs should be filled in. The casings and gas pipes The gap between them should be sealed with flexible anti-corrosion and waterproof materials.
CJJ94-2009 Code for Construction and Quality Acceptance of Urban Gas Indoor Projects
4 Installation and Inspection of Indoor Gas Pipelines
4.1 General Provisions
4.1.1 Before installing the indoor gas pipeline system, the pipeline components should be cleaned internally and externally.
4.1.2 The following requirements should be met before indoor gas pipeline construction:
1 Construction drawings and relevant technical documents should be complete;
2 The construction plan should be approved ;
3 The pipeline components and tools should be complete and can ensure normal construction;
4 The civil engineering work before the installation of the gas pipeline should be able to meet the requirements of pipeline construction and installation;
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5 The construction site should be cleaned to remove garbage and debris.
4.1.3 During the installation of gas pipelines, no holes may be made in load-bearing beams, columns and structural joints without the written consent of the original building design unit, and the structure and fire protection performance of the building shall not be damaged. .
4.1.4 When gas pipelines pass through trenches, building foundations, walls and floors, they should meet the following requirements:
1 Gas pipelines must be laid in casings and should be The casing is coaxial;
2 The gas pipeline in the casing shall not be equipped with any form of connection joint (excluding longitudinal or spiral welds and welded joints that have passed non-destructive testing);
3 The gap between the casing and the gas pipeline should be filled with flexible anti-corrosion and waterproof materials with good sealing performance. The gap between the casing and the building should be filled with waterproof materials.
4.1.5 The diameter of the casing installed when the gas pipeline passes through the foundation, wall and floor of the building should not be smaller than the requirements in Table 4.1.5; when the introduction pipe of a high-rise building passes through the foundation of the building, the casing The pipe diameter should comply with the provisions of the design documents.
4.1.6 The two ends of the wall casing of the gas pipeline should be flush with the wall; the upper end of the floor casing should be 5cm higher than the final ground, and the lower end should be flush with the bottom of the floor.