Purge settings

1. Equipment and pipelines for starting up and shutting down operations. 2. Equipment and pipelines that can be partially used during the production process. Some parts need repair. 3. Equipment and pipelines used intermittently during the production process.

1. Consider oil drainage and purging during startup and shutdown. 2. Consider maintenance and the isolation of the equipment. 3. It’s best to refer to similar installations; the purging points are generally well-established, and adjustments can be made as needed~~~

For long-distance transportation and pipelines prone to condensation, nitrogen purging is applied after use. Intermittent use is employed to prevent increased nitrogen purging due to thermal expansion of the liquid when both ends of the liquid are sealed. Such as methanol long-distance pipelines.

At the start of construction, each section of pipeline should be able to be scanned, right?

We deal with natural gas; except for brief exposure to air when purging is not required, purging is necessary in all other cases. In cases such as rapid valve replacement, air does not enter the system in large quantities and quickly, so purging is not necessary. However, for tasks like maintenance or repairs, and before restarting the system, nitrogen purging must be used.

1. The purging of steam pipelines shall be carried out in accordance with GB50235-97 \"Code for Construction and Acceptance of Industrial Metal Piping Projects\". II. The \"Code for Construction and Acceptance of Industrial Metal Piping Projects\" provides clear regulations on the methods for purging steam pipelines, related matters, and inspection standards; Article 8.4 in particular details the specific procedures for steam purging. 8.4.1 The temporary pipes installed for steam purging shall be installed in accordance with the technical requirements of steam pipes, and the installation quality shall meet the provisions of these specifications. 8.4.2 Steam pipes should be purged with high-flow steam, at a flow rate of not less than 30 m/s. 8.4.3 Before steam purging, the pipes should be pre-heated, water should be drained promptly, and the thermal displacement of the pipes should be checked. 8.4.4 Steam purging should be carried out in a cyclic manner, following the sequence of heating, cooling, and reheating. During purging, it is advisable to purge one pipe at a time in a rotating manner. 8.4.5 For the steam pipes leading to the turbine or as specified in the design documents, the test target plates shall be inspected after steam purging. When the design documents do not specify otherwise, its quality shall meet the requirements specified in Table 8.4.5. (The marks on the target should be less than 0.6 mm in size, the depth of the marks should be less than 0.5 mm, and there should be less than 1 mark per square centimeter; both tests conducted after 15 minutes must yield satisfactory results.) 8.4.6 In addition to the inspections of steam pipes specified in clause 8.4.5 of these standards, Yan steam pipes can also be inspected using planed wooden boards; such inspections are considered successful if no rust or dirt is present on the wood board after cleaning it.

I agree with the views expressed by those above; essentially, the purpose of online purging ports is to replace flammable or toxic substances within the system with inert gases during maintenance tasks, so as to prevent safety hazards and pollution resulting from direct discharge.

Refrigerator bottom, for long-distance transportation – this depends on the designer’s decision

I’ve benefited a lot; thank you, O(∩_∩)O