The maintenance requirements for SSAW (Spiral Seam Submerged Arc Welding) steel pipes in different application scenarios are as follows:

Water supply and drainage engineering

Internal and external wall anti-corrosion: Regularly inspect the anti-corrosion coating on the inner and outer walls of the steel pipe. If any peeling or damage is found, it should be repaired in a timely manner. For steel pipes that have been exposed to poor water quality for a long time, regular anti-corrosion treatment of the inner wall, such as coating with anti-corrosion paint, can be considered.

Pipeline cleaning: Regularly clean the pipeline according to the water quality. Mechanical cleaning or chemical cleaning methods can be used to remove impurities such as scale and rust on the inner wall of the pipeline, in order to ensure the water delivery capacity and quality of the pipeline.

Valve and accessory equipment maintenance: Regularly check the sealing and flexibility of valves, flanges, and other accessory equipment, and replace damaged seals and components in a timely manner. Lubricate and maintain the valve to ensure smooth opening and closing, and prevent valve failure from affecting the normal operation of the pipeline.

oil and gas transmission

External anti-corrosion layer testing and repair: Professional testing equipment such as anti-corrosion layer detectors are used to regularly check the integrity of the external anti-corrosion layer. For the discovered damaged points of the anti-corrosion layer, timely repair should be carried out, and repair materials can be used to ensure the protective performance of the anti-corrosion layer.

Cathodic protection system maintenance: Regularly test the cathodic protection potential and inspect the operation of cathodic protection facilities such as anode beds and test piles. Ensure that the cathodic protection current density and potential meet the design requirements, promptly replace failed anode materials, and extend the service life of steel pipes.

Pipeline patrol along the route: Strengthen the patrol along the pipeline, especially for pipelines crossing special areas such as farmland, rivers, and highways. Check for soil collapse and exposed pipes around the pipeline to prevent external damage to the pipeline. At the same time, attention should be paid to preventing the impact of third-party construction on the pipeline, communicating with the construction party in advance, and taking measures to protect the pipeline.

Building structural support

Surface rust prevention treatment: Regularly inspect the rust prevention paint layer on the surface of the steel pipe. If signs of rust are found, timely rust removal treatment should be carried out and the rust prevention paint should be reapplied. For areas in humid environments or prone to corrosion, the frequency of applying anti rust paint can be increased or coatings with better anti-corrosion properties can be used.

Structural stability inspection: Regularly inspect the steel pipe support structure to see if there is any deformation, looseness, or other issues. Inspect the bolts, welds, etc. at the connection points to ensure a secure connection. If safety hazards are found in the structure, reinforcement or repair measures should be taken in a timely manner to ensure the stability of the building structure.

Fireproof treatment and maintenance: If steel pipes are used in building structures with high fire protection requirements, the integrity of the fireproof coating should be checked regularly. If any peeling or damage is found in the fireproof coating, it should be repaired in a timely manner to ensure that its fireproof performance meets the requirements.

Chemical fluid transportation

Strengthening anti-corrosion measures: Select appropriate anti-corrosion measures based on the properties of the transported chemical fluid. For highly corrosive fluids, steel pipes lined with corrosion-resistant materials (such as polytetrafluoroethylene) or coated with special anti-corrosion coatings can be used. Regularly inspect the condition of the lining and anti-corrosion coating, and replace or repair them promptly if damaged.

Pipeline cleaning and replacement: Before transporting different types of chemical fluids or conducting regular maintenance, the pipeline should be thoroughly cleaned and replaced. Use appropriate cleaning media and methods to remove residual chemical fluids and impurities in the pipeline, prevent chemical reactions caused by mixing different media, and prevent corrosion or blockage of the pipeline.

Inspection of safety protection facilities: Check whether the safety protection facilities such as safety valves, pressure gauges, thermometers, etc. on the pipeline are working properly. Ensure the accuracy and reliability of these facilities, conduct regular calibration and maintenance to ensure safety during the transportation of chemical fluids.