With increasingly complex designs and the growth of welding plays an important role proper training – theoretical and practical – of skilled workers, welders. The manual is written in According to the State educational standards for the profession "Welder" and is designed for students of professional educational institutions to prepare the workforce of the profession. Material benefits based on the information in chemistry, physics, technology, metals and construction materials, electrical and other technical subjects. Highly skilled welders performing work on welding responsible structures, vessels, working under pressure, and various pipelines, should periodically validate their qualifications in accordance with the requirements of mi . On January 15, 2000 decision (from 10.30.1998, 83) in Russia introduced new rules for certification of welders and welding production specialists, who uni fied in accordance with international standards for levels of training and system certification of personnel in the field of welding production.

Rules for certification specifies requirements for education and preliminary training of welders who work in facilities, supervised by the State Technical Supervision of Russia. oals. Certification of welders performed on the production base of the appraisal or appraisal center points every 2 years. In this case, to confirm its right to carry out welding critical structures welder must pass the Certification Commission exams: general, special (theoretical) and practical. Textbook material contains information about welding, taking into account the recommended new rules list of topics submitted for the theoretical exams for certification of welders.

The use of ozone in the national economy as a means of sterilization and disinfection, offers significant advantages over other methods of sanitation facilities. Control cabinets ozonator dosed distribution of ozone on isolated room manufacturing facilities. The use of ozone in the national economy as a means of sterilization and disinfection, offers significant advantages over other methods of sanitation premises. Control cabinets ozonator dosed distribution of ozone on isolated room manufacturing facilities. In the premises eliminated extraneous odors, occurs disinfection of production equipment, raw materials and finished products, the destruction of various pests and insects. Ozonation of the premises and shops automatically during off-hours. At a given time of day timer control box includes an ozone generator.

After exiting the generator operating mode, with the start of feeding ozone include switchgear. Distribution of ozone on the premises performed consistently in a strictly defined by the operator time. To ensure the security staff of the enterprise, before the gas supply in ozoniruemoe room on his entrance lights up the banner: "Gaz. not Login '. Indoor lights also svetorechevoy banner: 'Gaz.

go away 'and hear the same speech a warning message. The duration of ozonation of each room depends on its size and also introduces operator in the memory of the processor. After completion of ozonation first room automatically switches the gas supply to the next, and the first space remains in aging. Dwell time for all premises is also being introduced in the processor memory and then counted automatically. At the completion of the exposure time control cabinet includes a ventilation system to ventilate the room for a specified time, after which extinguished warning banners. The room is sterile and ready for a new working day. Thus there is alternate ozonation of all premises. At the end of ozonation control cabinets automatically turn off the ozonator and go into standby mode until the next cycle. Timer is set in the control cabinet can be programmed include ozonation, at any time, day and month of the year for the period from one minute to two hours. For one cycle of ozonation is subjected to twelve rooms. When using more powerful and therefore expensive ozone generators, perhaps a parallel ozonation space ventures. Ozone – an extremely active and poisonous gas. Therefore, all the details of the pipeline, switching valves, various seals and fittings are used only of materials resistant to ozone.

Screw compressors are now used increasingly for a variety of enterprises. Until recently had been largely reciprocating compressors, but today, despite the obvious advantages of both, leaders Many companies are choosing screw compressors as the most successful version. Why is it so easy screw compressors? First and foremost it should be noted that the decision to replace the reciprocating compressors at the plant on screw compressors leads to a rather costly, since a change of compressor equipment requires more labor and funding. Prices of screw compressors is slightly higher than traditional piston but the cost of installing equipment piston equalize costs as screw compressors do not require a special foundation. Screw compressors can also save on energy costs.

On production the same volume of compressed air from a piston compressor takes much more energy. In addition, screw compressors consume very little oil, while oil consumption with piston compressors quite large. Another plus of such compressors is that it allows you to make the air cleaner. It is also very convenient that the screw compressor does not need a special room (for piston enterprises always created by compressor stations, as they make a lot of noise). Being quite small, screw compressors are conveniently placed in the shops, which requires the air supply. And of course today is highly valued automation in all areas of life. It is also a big plus screw compressors – their mode of operation can be set for a certain period of time, and the compressor will function normally without the need for support. Great disadvantage of reciprocating compressors was that their cooling is with water, for which the enterprises set pipe. Over time, tubes wear out, the gaps lead to leakage, pipe system also needs to support, while the screw compressors require exclusively in air cooling. In general we can say that the replacement of piston compressors for screw compressors is justified today – it's really improves working conditions, to save and to guarantee the successful operation of compressors for a long time.