Who knows what kind of chemical cleaning is required for steam pipelines before they are put into operation for the first time?

Generally, steam pipelines do not require chemical cleaning; steam purging is sufficient to meet the requirements. Steam pipelines that require chemical cleaning generally fall into the following categories: 1. Steam pipelines used in steam turbines – to ensure that the pipelines are thoroughly cleaned and to protect the turbine rotor, chemical cleaning is carried out first; thereafter, the pipelines are purged until they meet the required standards before being put into use. 2. For pipelines with large diameters, it is difficult to achieve the required purging pressure and flow rate; in such cases, chemical cleaning can be carried out, followed by drying with air. Based on the diameter and length, it can be cleaned in sections before installation. 3. Particularly dirty pipelines. 4. Ordinary cleaning solutions are usually prepared by professional cleaning companies, and they mainly consist of organic weak acids, corrosion inhibitors, passivators, etc. 5. Cleaning is divided into two types: process cyclic chemical cleaning and pipe section immersion cleaning, depending on the requirements. For detailed information, you can consult a chemical cleaning company directly. I’m sorry if this is not useful; I hope it can help you. :)

Generally, steam pipelines do not require chemical cleaning; steam purging is sufficient to meet the requirements. During steam purging, thermal expansion and contraction help to remove impurities from within the pipes as well as rust from the pipe walls, eliminating the need for chemical cleaning. The pipelines that require chemical cleaning are mainly those used for transporting oxygen, and this is determined by the properties of oxygen.

As mentioned in detail above, it should be added that when using steam to purge steam pipelines, it is necessary to tighten flanges, valves, etc. thermally; tightening them after the system is put into operation is too late, as this will affect tasks such as testing

The steam pipelines do not need to be cleaned, but they require repeated purging. Generally, purging is carried out at a certain pressure for a specified period of time; coordination with the boiler operation team is necessary to carry out purging at intervals, and whiteboard tests should also be conducted. Our steam turbine air compressors suffer from short purging times; the initial startup was carried out in a hurry, and now the extractors still get blocked from time to time, with the blockages mainly consisting of welding slag and similar substances. Additionally, repeated purging was also used to inspect the welds and eliminate pipeline stress.

The steam lines can generally be purged. If the pipes are too dirty, the contractor should be held accountable – as to how the pipes were selected and what steps were taken to prepare the original pipes before installation.

To ensure the proper commissioning and operation of chemical processing units, many of the equipment and pipelines within these units require chemical cleaning, namely acid washing and passivation, prior to purging or flushing. Equipment such as large steam generators (including waste heat boilers), high- and medium-pressure steam and boiler system supply networks, as well as the steam inlet pipes of steam turbine centrifugal compressors, all need to undergo acid washing and passivation after passing installation inspections, in order to remove various types of rust and deposits from their internal surfaces. This helps to improve the cleanliness of the steam produced and ensures the safe operation of the equipment. The cleaning procedure is as follows: rinse with water to remove dust and sediment ； Alkaline washing to remove grease ； Pickling removes iron filings, rolling scale, rust, silica, and more ； Passivation forms a smooth protective film on the inner walls of the system, thereby preventing rust from forming again. This post was last edited by maysee on 2008-2-27 11:36.]