Sealing ensures impermeability to gases and liquids of surfaces and joints of parts.
Sealing determines the reliability and durability of devices and equipment.
Types of sealing:
Sealants are a material that is resistant to mechanical stress at different pressures and temperatures. They come in the form of ribbons, threads, liquid mixture, or pasty consistency.
Sealing interflanges gaskets are elastic rings made of vulcanized natural or synthetic rubber for sealing flanged and wafer joints in water pipelines.
The work of flax as a sealant is based on the swelling of its fibers when exposed to moisture.
Use with care to seal thin-walled plumbing threaded connections. Swelling and then expansion of the flax fibers can cause rupture at the junction of the pipeline.
It is optimal to use flax together with a sealing paste.
This is a thin polymeric tape made of fluoroplastic, wound on a plastic spool. Thin tape wrapping at the connection points protects the water supply pipeline from leaks.
Benefits:
Disadvantage: Full sealing is not ensured in joints operating under vibration
A pipe sealing cord is a synthetic material, the fibers of which are impregnated with a special non-drying compound. It is rot-free and better protects against corrosion.
They are supplied in tubes or syringes.
Pros:
Resins are liquid sealants that are used for outdoor use and in humid environments.
The plastic and liquid material are used for waterproofing pipes, tanks, and wooden supports.
Conventionally, all mastics used for waterproofing pipelines are divided into cold and hot.
Hot mastic is prepared on the spot a few hours before the start of work. Heating is required for its preparation. The process of using hot mastic is associated with increased danger, so specially trained workers work with it.
The cold mastic is supplied ready to use. It is more convenient and safer to use, but it also costs much more.
They are more often used to seal the junction of a bath, toilet bowl, or a wash. They have a whitish or translucent color. They have a low resistance to permanent mechanical damage. Also, over time (silicone sealant), the material loses from the substrate, which facilitates the flow of liquid.
Thiokol sealant is a two or more component vulcanizing paste designed to seal seams, joints, and cracks. It is based on liquid Thiokol.
The material contains a solvent that destroys plastic surfaces. Therefore, it is not used to seal cracks in plastic products and structures.
Unlike other types, Thiokol sealant has higher strength, elasticity, and durability.