Tape for winding threaded connections. Anaerobic thread sealant in plumbing

Unfortunately, not one of the threaded connections has absolute tightness, this is especially true for gas pipelines and pipelines high pressure... To solve the problems of sealing threaded connections, various seals are used.

1. Linen strand.

Linen strand with red lead on drying oil is still a very common method of sealing threaded joints. Practically on this method, the entire installation of water pipes, heating systems and gas pipelines is based, since this is indicated in the SNiP for plumbing systems and for gas supply. There are other methods of using the flax span, for example, in combination with various sealants and pastes, the main task of which is to prevent corrosion processes in the threaded joint and to extend the life of the seal. Iron red is often used, which, unlike red lead, does not protect the thread surface of steel fittings from corrosion. It is also known to replace this type of seal with a "dry strand", that is, without any paint, which causes significant corrosion of the thread, especially when used on heating and water supply systems.

Disadvantages of using this method sealing is obvious - the complexity and the need for careful adherence to technology, large tightening efforts of fittings during assembly, low manufacturability. At high temperatures, for example when sealing heating systems, thermal destruction of flax fibers is possible. Also, in some cases, the disadvantage may be the difficult dismantling of the connection.

However, the linen strand is still used mainly due to its low cost and availability.

2. Sealants.

Tightness is achieved by filling the turn-to-turn space of the threaded connection with a special substance selected in accordance with the operating conditions of the system. In general, today, sealants are the optimal sealing method, combining ease of installation, corrosion protection and efficiency. It can be divided into three main classes: non-curing sealants, curing sealants, and anaerobic sealants.

2.1. Non-hardening sealants.

They are viscous pastes based on synthetic resins and polymers with fillers. They effectively protect metal surfaces from corrosion, and work well not only in threaded connections. Can be used in vibration conditions. Can be used in combination with various cushioning materials. The obvious advantage is the ease of assembly and disassembly of the connection. The use of non-hardening sealants is not recommended for joints with high pressure, differential pressure and temperature. Not suitable for use in aggressive and explosive environments.

Fig. 2 Multipak non-hardening sealant

Table 1. Examples of non-hardening sealants

2.2. Hardening sealants.

Typically, these are water-based or solvent-based pastes or gels that gradually harden after being applied to the threads. The curing time depends on the composition of the sealant and can range from a few seconds to several hours. They protect surfaces well, allow easy and quick assembly of the joint, after drying, they reliably seal the joint due to its resistance to extrusion. Depending on adhesion to surfaces and strength characteristics (shear loads), they are subdivided into sealants and adhesives. Adhesives are used in cases where it is necessary not only to ensure tightness, but also to fix the connection.

The disadvantages of this method are the inability to disassemble the connection without destroying the sealant, shrinkage during drying and during operation, low chemical resistance.

Fig. 3 OilSEAL hardening sealant

Table 2. Examples of hardening sealants

2.3. Anaerobic sealants.

ANAEROBIC is a word that characterizes the absence of oxygen or air, as well as the absence of dependence on oxygen or air.

A relatively new type of seal that is rapidly gaining popularity due to unique complex operational properties.

Anaerobic sealants are acrylic polymers, which in their initial state are liquid compositions of various viscosities, consisting of acrylic monomers and oligomers, initiators, catalysts, stabilizers, dyes and other fillers. These compositions are capable of being stored for a long time in an oxygen-permeable container without changing their properties and forming a homogeneous strong polymer mass in narrow metal gaps, such as thread inter-turn space, flange gaps, etc.

When the sealant enters the space between the metal surfaces, the initiators contained in the material begin to interact with the metal, starting the process of polymerization of acrylic monomers, with the formation of a polymer with a cross-linked structure. The intensity of the polymerization process depends on the intensity of interaction with the metal, and the speed can be increased by treating the surface with an activator. When using anaerobic sealants on products made of non-ferrous metals or alloy steels, as well as on surfaces with galvanized and other protective coatings, the polymerization rate is the lowest. Temperature also significantly affects the rate of polymerization. At low temperatures, polymerization slows down, and at high temperatures, it accelerates.

From the foregoing, we can conclude that the most effective use of anaerobic compounds for sealing metal products, but thanks to activators, the scope is expanding, and modern compositions are used on ceramic, glass, polymer and other surfaces.

The advantages of anaerobic sealants are high physical and mechanical properties, a wide operating temperature range (from -90 to + 200 ºС), good chemical resistance, manufacturability and ease of use. The big advantage is that the composition hardens only in the gap and the excess sealant can be easily removed. In some cases, anaerobic compounds have become truly indispensable. Unfortunately, it is not always possible to provide conditions for the effective use of these sealants.

Fig. 4 Anaerobic sealant Loctite 262

Table 3. Examples of anaerobic sealants

3. Sealing tapes, cords and threads.

3.1. FUM tape and FUM harness.

In our country, the FUM tape (fluoroplastic sealing material) produced according to TU 6-05-1388 is mainly widespread. It is intended for sealing threaded connections of technological pipelines through which corrosive liquids and gases are transported in the temperature range from minus 60 ° С to plus 200 ° С. It can be used in technological equipment of the pharmaceutical, food and medical industries, in pipelines for hot and cold water supply, including drinking. FUM tape ensures tightness of threaded joints operating at pressures up to 9.8 MPa (100 kgf / cm2). Depending on the application, the FUM tape is produced in three grades: grade 1 - the highest and first grade - for sealing systems with mediums of general industrial type, as well as systems with strong aggressive media (concentrated and dilute solutions of acids and alkalis); contains lubricant - medical vaseline oil according to GOST 3164-78 - from 17 to 20%; grade 2 - for sealing systems operating on oxygen and other strong oxidants; does not contain grease; grade 3 - for sealing systems with general industrial media, as well as systems with strong, aggressive media (concentrated and dilute solutions of acids and alkalis); represents the edge parts of the FUM tape of grades 1 and 2, as well as the SKL film, manufactured according to TU 301-05-49-90. manufacturing.

Table 4 Tapes FUM TU 6-05-1388

The FUM tape is an unsintered film made of fluoroplastic-4, due to which the material has a high chemical resistance and can be used in the food industry. Does not allow re-sealing and loosening-tightening, as it does not have elastic properties.

Advantages: ease of use. The connection is easy to assemble and disassemble. Excellent chemical resistance. Can be used for sealing in oxygen atmosphere. Disadvantages: low reliability under mechanical stress and vibration. It is not effective with frequent temperature changes, due to depressurization as a result of temperature deformations.

In addition to the domestic tape produced according to TU, there are similar products of European and Chinese production. As a rule, these belts are produced without lubrication and are analogous to FUM grade 2. Some Western manufacturers subject the belt to additional orientation (drawing) in one or more directions, which gives the material some elasticity.

Fig. 5 Imported FUM tape

FUM harness manufactured according to TU 6-05-1570 is a profiled product made of unsintered fluoroplastic-4D. Bundles are available in round or square sections and are used primarily as stuffing boxes. For thread seals, bundles are practically not used, therefore we will not consider them in detail in this section.

3.2. Sealing cords and threads.

Polymer cord or thread impregnated with a special sealing compound. Such products are produced by almost all major manufacturers of seals and fittings, specializing in sealing threads. Bundles or threads can be made from nylon, fluoroplastic and other polymeric materials. Products are "sharpened" for domestic use, pipelines for hot and cold water supply or gas pipelines of small diameters. The most famous threads and cords are SanTehnik, Loctite, Tangit Uni-Lock, Record. The materials are easy to use, you just need to wind the thread on the thread and tighten the connection. Moreover, the seal is quite reliable and cheap. Works well at low pressures and temperatures from -50 to + 140 ° C. The materials have been developed for use in high humidity environments and are therefore well suited for repairs on working pipelines. Not suitable for large diameter pipelines, high pressures and temperatures, as well as aggressive media and oil products.

Rice. 6 WEICON thread sealing thread

Table 5. Examples of sealing cords and threads

The modern Russian market, despite the negative factors, is becoming more civilized. It is full of effective innovative products in all areas. Plumbing and gas are no exception. If earlier only plant materials were used for it - for example, flax - now the time has come for other types of thread sealing - polymeric materials last generation, which are used in plumbing and not only. Namely - anaerobic sealants.

What is Anaerobic Thread Sealant? These are liquid polymeric materials, a kind of anaerobic threaded fasteners or, as they are rarely called, anaerobic pastes for plumbing, which extremely reliably seal threads and protect them from corrosion. They are called variably - adhesives, pastes or gels, plumbing gels or threaded gels. In this case, these are synonymous words and there is no fundamental difference between them. Let's move on from the terminology to the areas of application.

Where are anaerobic adhesives and pipe sealants used?

Anaerobic sealants are widely recognized in narrow circles a long time ago. They were actively used in the aerospace, military, and mechanical engineering industries. Where the reliability and durability of connecting materials is key, vital. Anaerobic thread sealants are now used in water, gas and heating networks. They are often used even as regular gel pads. They are equally relevant for mass housing construction and for private households. Instead of traditional flax and fum tapes for plumbing works, gels-sealants are becoming more and more relevant names of seals that sound from the lips of masters. As practice shows, anaerobic sealants are increasingly used for threaded connections in plumbing, due to their advantages.

Threaded connections, or as they are also called anaerobic thread clamps, feel great in aggressive environments, are resistant to high vibrations, high temperatures and pressure over 50 atmospheres. It is these properties that make it possible to say that such a sealant feels great not only in plumbing work, but also for other threaded connections, for example, in the gas sector.

They are approved for use in drinking water systems and have all the necessary certificates for this.

Features of the use of anaerobic sealants for threads

The principle of operation of sealants is that when they enter the narrow gaps of the thread, that is, in direct contact with the metal, in the absence of oxygen (inside the thread), they quickly polymerize. What does it mean? From a liquid material that completely fills the threads, they turn into a hard and very durable plastic. At the same time, they do not shrink and do not expand. Such a sealing gel is ideal for plumbing and not only where traditional flax or fum tape cannot cope.

As a result, you get an absolutely tight connection, and this property will not depend on any factors - temperature, pressure or twisting force. for carving has a unique "smart" composition. As we said, the gel polymerizes only inside the thread - where there is no access to oxygen. Liquid polymer remaining around the fitting during application can be easily removed with a tissue or brush and then transferred to a new connection.

How to use anaerobic thread sealant?

If you want to reliably seal the connection with a guarantee against leaks, while really saving time on installation, choose anaerobic sealants, they are equally well suited for plumbing, plumbing, gas and heating systems. They are not only good at work, but also incredibly convenient and easy to use. And for the master, this is an obvious advantage.

Sealant gels are available in small flat-necked tubes. They come with a special fiberglass brush. You need to apply the gel directly from the tube and distribute it with it. No additional tools are required. At most you will use a brush to transfer the extruded liquid polymer onto another compound.

For more information on the use of anaerobic thread sealants, you can look at our website.

Instructions for the use of anaerobic sealant

• Shake the tube.
• Open the cap and apply a thick layer of gel to the entire thread with the neck of the tube.
• Assemble the joint by hand and distribute the gel evenly by twisting the parts of the fitting.
• Remove excess, protruding from the thread, and transfer them with a brush to the next.

How long does anaerobic sealant dry and how does it dry?

Under standard conditions - at a temperature environment+15 ºC - 15 minutes is enough to check the quality of the seal with low pressure. If no leak is found, apply a working pressure of up to 10 atmospheres, and in a day - up to 40 atmospheres. At an installation temperature below + 15 ºC for polymerization, it will be necessary to warm up the connection.

Should I dilute the anaerobic sealant with something during application? No, its composition is balanced and fully operational. The only thing that is recommended to be done before starting work with the gel is to degrease the threads and remove the dirt. If there is rust on the threads, clean them with a wire brush. In general, anaerobic sanitary sealant contains strong solvents, but for the best effect, follow our advice.

Pros and cons of anaerobic thread sealants

• Simple application - does not require a lot of work experience and serious skill from the master
• High speed of application and curling - only about 20 seconds
• Economical consumption - excess gel from one thread is not disposed of, but transferred to another
• Easy assembly- connections can be collected manually without using keys.
• Absolute tightness - maintains even at extreme pressures up to 100 bar
• Rust protection
• Affordable price an anaerobic sealant for retail and wholesale buyers with such exceptional product properties
• Adjustable up to 180 degrees

It is realistic to single out only one drawback of the sealant - at low temperatures of installation or dismantling of pipes of large diameters, heating will be required.

How do anaerobes behave when removing connections?

You can disassemble the joints with the sealant immediately if you notice leaks during the pressure test, or even after a long time. Depending on the type of gels, dismantling is carried out with a conventional tool, for example, with a wrench, but if the seal was made with a gel with a particularly strong fixation, then preliminary heating of the connection with a construction hairdryer is required. When dismantled, the gels turn into crumbs. The polymer, which looks like a coarse powder, is removed with a regular rag.

Interestingly, it is not necessary to completely remove the frozen gel. It will not in any way affect the new sealant applied on top or the overall seal quality.

Where to buy wholesale and retail anaerobic sealants (gels, adhesives) for threaded connections?

The "Region Spetstechno" company produces polymer seals of its own brand - SantechMasterGel and StopMasterGel. You can buy them in almost all regions of the Russian Federation. To find out the addresses of outlets, just go to the Where to buy section, select the country, region and your city under the map - outlets will be marked on the map and listed under it. You can also order a product on our website, just add it to the basket and place an order, our managers will contact you to confirm the order as soon as possible.

There is nothing to replace the anaerobic sealant with today. Its unique composition solves the problem of durable pipe sealing. Connection guarantee - 20 years. This is 20 years of your peace of mind and pride in the work done.

During installation modern systems heating and water supply, special threaded connections are used, which often cause a wide variety of troubles. Improper sealing of such a unit can lead to the formation of leaks of varying intensity at the joints of the pipes. Therefore, it is very important to select the ideal sealing material that will ensure the normal functioning of the systems over a long period.

Thread use

The sealing thread is made from various materials, thanks to which it acquires completely different properties:

• polyamide - withstands temperatures up to 130 degrees and pressures up to 8 atmospheres in the gas supply system and up to 16 atmospheres in heating and water supply;
• fluoroplastic - used at temperatures from -250 to +250 degrees and pressures up to 30 bar, and is resistant to aggressive chemical environments.

Use a thread by winding it clockwise around the thread from the outside edge. Pressing it tightly, it is necessary to make a sufficient number of turns to completely hide the thread.

Pastes and gels

When installing high-pressure systems, acrylic and silicone pastes are used. In most cases, they are used as a lubricant when sealing joints with tow or flax. This ancient and reliable method is ideal for water supply and heating systems with operating temperatures up to 90 degrees. The most popular pastes are Unipak, Pate Detancheite, Gebatout 2.

Installation begins with the formation of a thread from flax (tow) and winding it onto the thread. After that, the wound thread is impregnated with a paste or gel to facilitate assembly and disassembly of the connection.

Fum tape

PTFE sealing material in the form of a tape is used for hot and cold water supply, heating systems and when connecting instrumentation to the gas pipeline. FUM tapes are produced 0.08-0.12 mm thick and 10-16 mm wide, which allows them to be used for various thread sizes.

When winding, the tape should be slightly stretched so that it tightly covers the grooves of the thread. The last few turns can be placed over the entire surface from one edge to the other.

Sealants and gaskets

Anaerobic sealants are the easiest way to seal threaded connections. Installation consists of several sequential operations:

1. degreasing the surfaces of both connecting elements;
2. applying sealant to a dry surface;
3. twisting with hands and a key;
4. waiting for the sealant to harden.

When buying a product, you should pay attention to its operating temperature and the maximum thread diameter. These parameters are just as important as the force required to disassemble. There are low, medium and high strength sealants. High force agents are only used for thread diameters from 2.5 inches. When disassembling, they must be preheated.

Threaded connections in plumbing are present even in new-type water pipes. They need reliable and high-quality sealing. Previously, linen strands, FUM tape, and sealing threads were used for this purpose. Today they are replaced by anaerobic sealants known to the consumer as "anaerobic glue", which are improved new generation of liquid polymers.

They not only provide high reliability of the seal, but also protect the threads from corrosion. The use of anaerobic sealants ensures high quality new level fixing, sealing and sealing in plumbing that any other type of fixer cannot provide.

Sealing threaded connections

It is carried out to prevent and exclude leaks at the joints of plumbing equipment. Temperature extremes lead to contraction and expansion of the pipe material. Vibration from the water supply system has a similar effect. These and other accompanying factors, which include the poor quality of the metal, the impact of corrosive processes, lead to weakening, loosening of the thread and the occurrence of leaks.

To avoid adverse effects, it is not enough just to carefully tighten the crimp washers; all connections must be sealed. It is important not only to seal the thread, but also to minimize the impact of negative factors. This is the reason for the desire of both the plumber and the home craftsman to choose the most high-quality and durable sealant, which is anaerobic glue.

Special substance for sealing threaded joints. It enters metal narrow spaces, reacts with air, changes its structure and hardens. The threads filled with anaerobic adhesive are sealed and the connection is sealed. Polymer glue can be used not only for metal, but also for plastic surfaces.

The unique composition of the sealant was developed in the fifties of the last century in the United States. Later, anaerobic glue appeared in the Soviet Union, where it was used in rocketry. In everyday life, sealants became widespread much later, but, thanks to their unique composition and high performance, quickly gained popularity. They replaced the previously used types of seals in autonomous heating systems, and later became actively used for all threaded connections in plumbing.

The widespread adoption of polymer glue was also facilitated by the fact that the substance is approved for use in drinking water systems. The sealant is absolutely harmless to humans.

Composition of thread sealant

The following components are used in the production of anaerobic glue:

• acrylic polymer or oligomer;
• stabilizers - inhibitors;
• thickeners, colorants and other functional additives;
• complex of initiating substances.

The oligomers or acrylic polymers that form the base of the sealant provide the viscosity of the substance in liquid form and complete solidification after reacting with oxygen. Initiating substances, which are used as hydroperoxides and peroxides, are responsible for the solidification reaction. The process can be accelerated by adding special accelerators or co-accelerators.

Inhibitors act as stabilizing substances that protect the structure of the sealant from various kinds of chemical influences. Phenols, quinones and other polymers of various types are used as stabilizers. The additives present in the composition of the sealant give the composition a certain color, increase its resistance to alkaline and aggressive acidic environments.

The difference between anaerobic and other types of sealants

The liquid consistency of the polymer glue ensures the penetration of the substance into the narrowest places. The sealant reliably grasps metal surfaces, easily fixes parts without the use of special keys. The ease of use, which does not require the skills and experience of working with this type of formulation, makes it accessible to both professional masters and beginners.

The unique multicomponent composition made anaerobic sealants a modern alternative to outdated, inferior in quality new generation polymers, press fit, gaskets, seals. The fixation is so strong that only heating or the use of tools allows the elements to be separated. This quality of the sealant is both a plus and a minus.

Features of thread sealants

Anaerobic adhesive has a long service life. Under conditions of minimal exposure to an aggressive environment, it lasts up to five years, and in more extreme conditions - at least a year. Its wide viscosity range allows it to be used for gaps that are between 0.07 and 0.5 mm thick.

A new generation of polymer sealant reacts with air even at room temperature and has different strengths (from low to maximum high). During application, the substance forms a uniform one-component composition.

Advantages

The main advantages of anaerobic glue include:

• wide range of operating temperatures;
• resistance to mechanical stress;
• economy of consumption;
• immunity to vibration and aggressive environments;
• when cured, it does not dissolve in water;
• the ability to connect metals dissimilar in structure and composition;
• pressure resistance over 50 atmospheres;
• ease of use and high practicality;
• the best ratio "price and quality".
• The temperature at which you can work with the sealant depends on the type of adhesive. Some are suitable for use in a temperature range from -196 to +150, others - from -60 to +300 degrees Celsius.

disadvantages

The latest generation of polymer thread glue has its drawbacks. They are not as essential as mechanical sealants, but you need to know them:

• not recommended for use on pipes with a diameter greater than M80;
• low temperatures significantly increase the polymerization time of the solution;
• can only be used on dry surfaces.

For many buyers, the disadvantage is cost. It is higher than other types of seals. However, considering the economical consumption, high quality and the reliability of the joints formed, the reliability of sealing, the price of aerobic glue is fully justified.

Types of anaerobic sealants

New generation polymer seals differ in strength: low, medium and high. Of no small importance is the degree of viscosity, on which such characteristics of the glue as fluidity and penetration depend.

Anaerobic sealants have a wide range of applications and in the line of each manufacturer there are compounds for working not only with threaded, but also with sleeve, pipe connections, fittings and flanges. To facilitate the task of choice, the color marking allows the decoding of which is given in the technical table on the packaging. Therefore, when choosing a thread sealant, you need to pay attention to the color of the marking.

Strength

Low strength anaerobic sealants are designed to seal joints that are not subject to excessive stress and require frequent dismantling. You can disassemble a joint sealed with such a compound with a conventional tool. The breakaway torque of the sealed joints is from 3 to 10 Nm.

Compositions of medium strength are used when carrying out service and repair work, sealing joints subject to increased vibration loads. This type of glue is considered to be universal, since the moment of breakage of the connection varies between 15-25 Nm.

Anaerobic glue of strong strength is used for fixing threaded connections that do not require frequent dismantling or do not require re-disassembly at all. This type of sealant is resistant to extremely high shock and vibration loads, increased pressure, has a high breakaway torque from 16 to 50 Nm.

Viscosity and color

With a decrease in the gap between the elements to be fixed, the penetrating power should increase. Therefore, the viscosity index should be lower.

To create a reliable seal for the 0.07 mm gap, it is necessary to use a sealant whose viscosity does not exceed 20 mPa. Otherwise, the glue will not be able to penetrate the space between the threads.

For joints with large threads, higher viscosity sealants are required. If the gaps are up to 0.5 mm, then the viscosity of the fixative used should be maximum.

The color coding serves only to indicate the scope and characteristics of the fixture. It differs from manufacturer to manufacturer. The palette can be white, green, yellow, red, blue, orange.

Choosing a fixture for plumbing work

Depends on the operating conditions of threaded connections and the following factors:

• features of the thread, including the size of the gaps;
• absence / need for subsequent dismantling;
• the material from which the connection is made;
• the required degree of joint strength;
• polymerization time.

For household needs, there is no need to purchase high strength clamps. It should be borne in mind that not all anaerobic sealants are of the same quality. Preference should be given to reputable manufacturers. These are Loctite, Loxeal, Anaterm, Santekhmaster, Weicon, Rite-Loc, Permabond.

Using an anaerobic thread sealant in plumbing

Sell ​​anaerobic glue in packages with a flat neck. Some manufacturers include a special brush with the sealant. If not, this tool is purchased separately. You will also need a cleaner to work. No wrenches or other tools that are used when working with other types of sealants are required.

When sealing is carried out on a new joint, the surface is degreased. New parts are lightly sprayed with cleaner. Carrying out similar work on old threads requires pretreatment with a brush. Otherwise, the quality of fixation will be significantly lower.

Order of use

Nothing needs to be added to the sealant. The product is completely ready for use. If it is necessary to connect a plastic product, its surface is pre-treated with an activator. Regardless of this, the order of work remains the same:

• shake the packaging with the sealant;
• open the cap and apply glue with a tight closing ring over the entire surface of the thread;
• parts are connected and wrapped;
• the excess of protruding glue is removed with a rag or transferred to an adjacent area with a brush.

To achieve the highest quality seal, it is better to apply the sealant to both the external and internal threads, you need to monitor the uniform distribution of the composition over the entire surface.

Setting time of anaerobic fixative

Polymerization of the composition occurs at a temperature of +15 degrees Celsius. There is no need to create any special conditions for the sealant to harden. If the work is carried out at a lower temperature, additional heating may be required. This becomes necessary when it is necessary to accelerate the setting time of the glue.

Within a quarter of an hour, it hardens. The connection is checked for leaks under a pressure of about 10-15 atmospheres. Re-check is carried out a day later. The working pressure of the supplied liquid must be up to 40 atmospheres.

How do I remove anaerobic sealant from a threaded joint?

The need to remove the sealant may arise both after the expiration of its service life, and in the event of leaks. Removing the adhesive is more difficult than applying it. This requires a key and a hair dryer if a high-strength compound was used. The compound is preheated. Medium to low density sealant can be removed without using a hot air gun, using only a wrench. During dismantling, the anaerobic glue turns into crumb. It is simply brushed off with a rag or brush.To reapply the anaerobic sealant, you do not need to completely remove the old adhesive. The new composition fits perfectly on the crumb. This does not reduce the strength of the resulting joint.

Instructions

Depending on the application, the FUM tape is produced in three grades:

grade 1 - premium and first grade - for sealing systems with general industrial media, as well as systems with highly aggressive media (concentrated and dilute solutions of acids and alkalis); contains lubricant - medical vaseline oil according to GOST 3164-78 - from 17 to 20%;

grade 2 - for sealing systems operating on oxygen and other strong oxidants; does not contain grease;

grade 3 - for sealing systems with general industrial media, as well as systems with strong, aggressive media (concentrated and dilute solutions of acids and alkalis); represents the edge parts of the FUM tape of grades 1 and 2, as well as the SKL film, manufactured according to TU 301-05-49-90.

In addition to these 3 brands, a regular retail tape is produced for ordinary consumers.

Before installing fittings with a seal with FUM tape, thoroughly clean their threads from dirt and rust, then rinse them with gasoline. Wrap the tape on the valve thread or plug from the beginning along the thread in such a way that the subsequent turn partially (by 30-40%) overlaps the previous end of the tape. In order to eliminate the appearance of wrinkles and folds on the FUM tape, which, when screwing in the plug, roll up and lead to loosening of the joint, wind the tape with an interference fit. To make it easier to wind the tape on the thread, wind the tape from the roll, and press the roll against the threaded part and move it around the circumference. After you have wound the tape, press it firmly against the thread with your fingers. Then start screwing some part, such as a tap, to the threaded connection. It should twist tightly, while the FUM tape is kneaded and fills all the space between the two threads.

If the screwed-on plumbing fittings are screwed on easily, then wind up the FUM until it starts to wind up hard, and so that you can tighten it tightly with a key, while the FUM tape should squeeze out a little at the place where the fittings and the pipe join. When you connect all the necessary parts with the FUM tape, then open the water, carefully look if it is flowing where. If you notice even a drop of water, then tighten this connection a little more or roll up a little more tape there.

The FUM tape is good because if you decide to change something in your water supply system, then it will not be difficult to disassemble all the details. The FUM tape is soft and elastic, does not undergo destruction, does not allow the parts to be joined to corrode. If you have everything assembled on linen or tow with paint, then disassembly turns into a whole problem, when it is necessary to warm up, burn through the parts, treat them with various solvents.

FUM tape is usually used to seal threaded and flange joints, which are made of materials operating at pressures up to 9.8 MPa (100 kg / cm2) and temperatures from -180 ° C to 260 ° C.

Instructions

The thread sealing tape is an unfired PTFE film. This material is non-toxic and oil-resistant. Such ribbon quite easy to install. Among its positive properties are high chemical and thermal resistance. The material has excellent sealing properties. Besides, FUM ribbon can be stored indefinitely.

You can use this material not only for sealing threaded connections, but also for sealing process pipelines and threaded connections in equipment in many industries. FUM the tape has become widespread in the construction, medical, pharmaceutical and other industries. FUM tape comes in different brands.

With its help, it is possible to prevent leaks that exist in the water supply connection. If the plumbing fittings are easily screwed on, then you need to rewind ribbon FUM until it starts to wind up hard. After that, using a wrench, tighten the connection itself well. As a result, the material should be slightly squeezed out at the junction of the two pipes. After that, as you have connected all the necessary parts, you can slowly open the water. Examine the joint carefully. If the water still flows, then roll up a little more tape there and tighten this connection more tightly.

This material is widely used in the water supply industry. The tape has good elasticity and does not break. The connected elements will no longer corrode.

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Sources:

• fum how to use in 2017

In order to achieve the tightness of any connection on long years it is necessary to wind the required amount of tow on the thread of the butt elements. In order to get the desired result, the winding of tow must be done correctly. And so, how to wind tow on the thread:

You will need

• Oakum, sanitary wrench, silicone

Instructions

Separate a small strip of tow fibers from the main bundle. Spread it out along its entire length. Next, twist the fibers into a string. The size of the rope will depend on the depth of the thread.

Take the plumbing wrench. With sponges, grab the thread on which you are going to wind tow and lightly press on the key to make small notches on the thread. Thus, you will get a slight roughness on the thread, thereby increasing its tenacity with tow.

Place the end of the flaxseed fiber over the edge of the thread. Next, wind evenly in the opposite direction of tightening the nut, so that the next skein tightly presses the previous one. The amount of winding should be in moderation. Pay attention to the winding on the other side, it is important that there are no gaps.

After you have wrapped the tow to protect it from the effects of water, you need to apply silicone on top. Next, distribute it evenly throughout the thread. Until the silicone has cured, the connection can be twisted and checked for leaks. You have 8-10 minutes for full polymerization.

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note

Silicone cannot be used for the tightness of gas connections, as the gas corrodes it. For such connections, it is best to use a special gas tape FUM.

Sources:

• what is tow made of

In order to achieve the strength and tightness of the connection, builders and plumbers use in their work linen or special linen tow, which is wound on carving butt elements. In order to achieve the truly desired results, it is important to know how to reel linen on carving right.