How much does Taiyuan sell chemical pipeline per meter

At present, the high-temperature pipelines of chemical enterprises in China are mainly distributed in steam pipelines and some high-temperature hydrogen pipelines. Due to the development of chemical production process, hydrogen reduction is mostly used in the reduction reaction of many chemical production plants. The material selection is mainly based on the Nelson curve. 1Cr5Mo (i.e. Cr5Mo) is the steel commonly used for high-temperature hydrogen resistant pipelines at home and abroad. When selecting, it should be noted that this steel belongs to pearlitic steel in the normalizing+tempering state, and martensitic structure in the quenching+tempering state. At this time, the weldability of the steel decreases. Usually, when used as a pipe, it is not to improve the strength, but to improve the weldability. The requirements for preheating and tempering after welding are strict. This is difficult to achieve during pipeline construction, but it is much simpler when austenitic welding rod is used, and post welding heat treatment is not required.

The piping layout of chemical workshop shall meet the following requirements:
1. Meet the requirements of production process flow and production requirements
2. Easy to operate and manage, and can install and produce
3. Convenient for installation and maintenance of pipelines;
4. It is required to be neat and beautiful, and try to save materials and investment

Vertical layout principle of pipes and pipe supports
1. When there is a passage under the pipe rack, the distance between the pipe bottom and the road surface shall be more than 4.5m; It shall be more than 6m when the main road is a thousand roads; It shall be more than 2.2m for sidewalk; When there is a pump under the pipe rack, it shall be more than 4m.
2. Generally, the elevation difference between the two layers of pipes in the direction of use is 1.0~1.6m, and the branch pipe from the main pipe is 0.5~0.8m higher or lower than the total. When changing the direction of the pipe, the elevation shall be changed at the same time. When large diameter pipes need to turn on the horizontal surface, they should be arranged outside the pipe rack.
3. When the pump is arranged under the pipe rack, its elevation shall meet the clearance requirements when the pump is arranged. If the pipeline below the operating platform enters the upper layer of the pipeline, the upper pipeline marker can be determined according to the elevation of the operating platform
4. The pipeline with orifice plate should be arranged outside the pipe rack and close to the column as far as possible. The automatic regulating valve can be arranged close to the column and fixed with the column. If there is a local platform or sidewalk on the upper layer of the pipe rack, the valves and instruments that need frequent operation or maintenance should be arranged on the upper layer of the pipe rack.