1.0.1 This Specification was formulated with a view to implementing the national technical and economic policies in structural design of buried cast-iron pipeline of water supply and sewerage engineering and achieving advanced technology, economic feasibility, safety and usability, and quality assurance.
1.0.2 This Specification is applicable to the structural design of buried grey cast-iron pipeline, ductile cast-iron pipeline and as-cast ductile cast-iron pipeline of general water supply and sewerage engineering in public utilities and industrial enterprises. The burying condition of pipelines is flat subgrade or artificial shapped subgrade. This Specification is not applicable to the structural design of such buried cast-iron pipeline with special requirements.
1.0.3 This Specification was compiled according to the principles specified in the current national standard "Structural Design Code for Special Structures of Water Supply and Waste Water Engineering" (GB 50332).
1.0.4 In addition to complying with this Specification, the structural design of buried cast-iron pipeline of water supply and sewerage engineering in earthquake area, collapsible loess area, expansive soil area and other areas with special conditions also shall be in accordance with those specified in the current relevant standards of the nation.
1.0.5 During construction of cast-iron pipeline, the requirements of the current national standard "Code for Construction and Acceptance of Water and Sewerage Pipeline Works" (GB 50268) also shall be complied with.
