Are there any corresponding design specifications or materials for long-distance pipelines?

1. Piping should be laid in parallel rows, following straight lines as much as possible with few bends (except for natural compensation and to facilitate installation, maintenance, and operation). There should be few intersections in order to reduce the number of pipe supports, save material for these supports, and achieve an orderly and aesthetically pleasing appearance that facilitates construction. 2. When the pipeline changes elevation or direction, it should be avoided that gas accumulates to form \"gas pockets\" or liquids accumulate to create \"pockets\" and \"dead ends\" in the pipeline; if this is unavoidable, a vent valve should be installed at the higher point and a drain valve at the lower point. 3. In pipes transporting toxic or corrosive media, valves, expansion joints, flanges, etc. shall not be installed in pedestrian walkways, to prevent the medium from leaking onto people in case of a leak and causing work-related injuries. 3. Gas and steam pipes should have branch pipes leading off from above the main pipe in order to reduce the amount of condensate carried along. The pipes must have a slope to prevent liquid from accumulating inside them. 4. When designing the piping, the pipes should be placed as closely together as possible; the spacing between them should be an integer value. It is also possible to refer to a table of recommended pipe spacings, but it is essential to ensure that the spacing meets the requirements for construction. The material pipelines should be installed on the upper layer of the pipe rack. In addition to insulation, the hot media should also be separated from the cold media to prevent mutual interference; generally, the hot media are placed on the upper layer while the cold media are placed on the lower layer.

The main design and construction standards for long-distance pipelines are as follows: 1. GB50251 \"Design Code for Gas Pipeline Projects\", 2. GB50253 \"Design Code for Oil Pipeline Projects\", 3. SY 0401 \"Construction and Acceptance Standards for Long-Distance Pipeline Projects\", 4. GB50183 \"Fire Protection Design Code for Crude Oil and Natural Gas Projects\", 5. SY/T5922 \"Operation Standards for Gas Pipelines\", 6. SY 6186 \"Safety Regulations for Petroleum and Natural Gas Pipelines\", 7. SY/T6457 \"Safety Regulations for Sulfur-Containing Gas Pipelines\", 8. SY 5737 \"Safety Regulations for Crude Oil Pipelines“. For reference!