Welded Threaded Pipe Fittings

The maintenance of Welded Threaded Pipe Fittings helps ensure their performance,extend their service life,and ensure the safe and stable operation of the pipeline system.The following are detailed maintenance points:

Daily inspection

Appearance inspection

Regular inspection:Assign a dedicated person to conduct a comprehensive visual inspection of Welded Threaded Pipe Fittings at regular intervals(such as monthly or quarterly).Carefully observe the surface of the pipe fittings for defects such as cracks,sand holes,corrosion spots,deformation,etc.For example,in the pipeline system of chemical enterprises,due to the corrosive nature of the medium,it is even more important to closely monitor the corrosion situation on the surface of the pipe fittings.

Abnormal Marking:Once any abnormal appearance is found,it should be promptly marked with obvious markings(such as colored stickers),and the location,size,and severity of the defect should be recorded to provide a basis for subsequent processing.

Inspection of connection parts

Check the tightness:Check whether the threaded connection of the pipe fittings is firm and whether there is any looseness.You can use a suitable tool(such as a wrench)to gently shake the pipe fittings and feel the tightness of their connection.For important pipeline systems,torque wrenches can also be used to check whether the torque of threaded connections meets the specified values.

Check the sealing condition:Observe whether there is any leakage at the connection part.If liquid or gas leakage is found,immediate measures should be taken to deal with it.Simple methods such as soap and water can be used to check for gas leaks.If bubbles are generated,it indicates the presence of a leak point.

Cleaning and maintenance

Surface cleaning

Remove dirt:Choose the appropriate cleaning method based on the environment in which the pipe is located and the type of dirt it is contaminated with.For general dust and oil stains,a clean damp cloth can be used to wipe them off;For stubborn dirt,mild cleaning agents can be used for cleaning,but care should be taken to avoid using cleaning agents that can corrode the material of the pipe fittings.For example,for stainless steel Welded Threaded Pipe Fittings,cleaning agents containing chloride ions should be avoided.

Preventing damage:During the cleaning process,soft tools such as sponges and soft bristled brushes should be used to avoid scratching the surface of the pipe fittings,which may damage the anti-corrosion layer or passivation film on the surface and reduce the corrosion resistance of the pipe fittings.

Internal cleaning(if necessary)

Applicable situation:When the medium transported by the pipeline system is prone to residue,scaling,or microbial growth inside the fittings,it is necessary to regularly clean the inside of the fittings.For example,in pipeline systems in industries such as food and pharmaceuticals,regular internal cleaning is necessary to ensure product quality.

Cleaning methods:Rinsing,chemical cleaning,mechanical cleaning,and other methods can be used.Rinsing is the most commonly used method,using clean water or appropriate cleaning solution to remove impurities and residues inside;Chemical cleaning is the process of selecting appropriate chemical agents based on the nature of the dirt,but attention should be paid to controlling the concentration and cleaning time of the cleaning agents to avoid corrosion of the pipe fittings;Mechanical cleaning is suitable for situations with severe scaling,and tools such as brushes and scrapers can be used for cleaning.