【Daily Question】Utilities - Water Supply and Drainage - 20191022

Thread Content

Which of the following statements regarding the installation of indoor water supply pipes is in line with the current \"Code for Design of Building Water Supply and Drainage Systems\"? (  )   A. Water supply pipes shall not be laid directly within the structural layers of a building. B. Water supply pipes should avoid passing through expansion joints, settlement joints, and deformation joints. If passage is necessary, fixed supports should be installed. C. When indoor water supply pipes pass through the exterior walls of basements, devices should be provided to compensate for thermal expansion and shear deformation of the pipes. D. Water supply pipes can be laid in flue ducts and air ducts, but not in elevator shafts or drainage channels. Answer: A is the correct answer. According to Article 3.5.11 of the current Code for Design of Building Water Supply and Drainage, when pipes pass through expansion joints, settlement joints, and deformation joints, devices should be installed to compensate for pipe expansion and shear deformation. The fixed supports provided in option B restrict the expansion and deformation of the pipeline, making it more prone to damage. According to Section 1.3 of the \"Building Water Supply and Drainage Engineering\" (4th edition), when pipes pass through expansion joints and settlement joints, measures such as flexible joint methods, threaded elbow methods, and movable support methods are commonly employed. Option C does not comply with the provisions of Paragraph 1, Article 3.5.22 of the current Code for Design of Building Water Supply and Drainage. When indoor water supply pipes pass through the exterior wall of an underground room, a waterproof sleeve should be installed, rather than a device to compensate for pipe expansion, contraction, and shear deformation. Option D does not comply with the provisions of Article 3.5.10 of the current Code for Design of Building Water Supply and Drainage Systems, which states that water supply pipes shall not be installed in elevator shafts or drainage channels, nor in flue ducts or air ducts. Option A complies with the provisions of Paragraph 1, Article 3.5.18 of the current Code for Design of Building Water Supply and Drainage.