Oxygen cylinders and cryocylinders
More than 100 years of oxygen widely used in almost all medical institutions around the world. And all the while his delivery in health facilities was carried out in a traditional way – with a steel cylinder. Standard oxygen cylinder – a steel cylindrical vessel 70 kg, 40-liter, filled with gaseous oxygen up to 150 atmospheres (15 MPa).
Working with balloons extremely laborious and dangerous. Cylinders, received a medical facility, it is necessary to unload, move to the discharge ramp to connect / disconnect and perform all the same in reverse. These operations are carried out with use of oxygen several times a day. In addition, the cylinder is a potential explosion hazard caused by the high pressure of oxygen gas in the tank, as well as its properties as an active oxidizing agent. Cylinders should be moved with extreme caution, keep away from heat, falls and blows.
ADVANTAGES AND DISADVANTAGES OF THE GASIFIERS
In the 80-90s in large medical institutions have to supply medical oxygen through the gasification of 3, 5 and 8 m2, which is equivalent to 400-600 cylinders of oxygen gas. In Kiev it is such medical institutions such as the National Cancer Institute, the National Children’s Hospital “OHMATDET”, Institute of Cardiovascular Surgery. N.Amosov and others.
Gasifiers are equipped with one third of health facilities in Kiev and about 10-15% – of all medical institutions of Ukraine.
The gasifier is an integrated unit consisting of:
- tank for storage and delivery of liquid oxygen;
- vaporizer for converting the liquid to gaseous oxygen with the ambient temperature.
The reservoir consists of inner vessel, reinforcing the cabinet filled with instrumentation, control and safety valves. The space between the vessel and the casing is filled with an insulating material and evacuate that allows you to store liquid oxygen for quite a long time before using it.
Use of this gasifier has a number of significant advantages over the supply of bottled: the exclusion of the use of heavy physical labor for loading / unloading, the lack of high pressure (operating pressure of the gasifier from 2 to 16 atm.), The availability of safety devices, reducing the cost of delivery of oxygen, etc. .
There are a number of drawbacks that hinder the installation of these gasifiers – the cost of gasifiers (700-800 UAH depending on the volume) and the availability of acceptable distances from medical and administrative buildings (as an object of increased security), which is especially important when there is no vacancy in the medical institutions located within the city.
CRYOCYLINDER – LOW VOLUME GASIFIER
The solution drawbacks when using a large amount of gasifiers is the use of gasifiers small volume (kriotsilindr DPL 450170-1,37; DPL 450 210-2,88).
Kriotsilindr – is a cryogenic vessel made of stainless steel, equipped with screen-vacuum insulated and equipped with shut-off and control valves, level, economizer control devices, control system and maintain the pressure for converting the liquid oxygen in the gas.
Using kriotsilindr greatly enhances operational safety due to reduced operating pressure (up to 14 atm. Compared with a cylinder in which 150 atm.), Safety (safety valve, bursting disc), reduction of labor to maintain. Cost kriotsilindr 35-40 th.
These kriotsilinders good use in medical institutions at the rate of 100-400 containers per month. We should also mention the possibility of using existing kriotsilindr on oxygen distribution stations in health care facilities, which reduces the cost of implementation. UNITY kriotsilindr liquid oxygen is at their place of use, which reduces the complexity and cost of delivery.
Shavernev Volodymyr Vasylovych,
- Head of the Department of Supervision in metallurgy, machine building, power engineering, construction and kotlonahlyadu
As is known, installation and safe operation of vessels working under pressure (DNAOP 0.00-1.07-94) were canceled by order of MOE. On the first of July we use rules of design and safe operation of vessels working under pressure, approved by the State Technical Supervision of the USSR 27 November 1987. Determining what kriotsilindr gasifier or as the rules 1987 and 1994, no. Kriotsilindr in our market appeared around about 10 years ago. The first in the development of their steel enterprises in Kiev and Kiev region. Who is actively working to develop new rules for operation of vessels and boilers, which was entrusted with the Kiev expert and technical center. Rules are almost ready, but the promotion is currently suspended due to the revision of the Technical Regulations security simple piece of plate and high-pressure safety equipment that operates poddavleniem.
Shtanko Volodymyr Vasylovych,
– Head of Certification SE “Kyiv ETC»
By January 1, 2013 cylinders subject to compulsory certification in the national UKRSEPRO. According to the Decree on standardization and certification, they were seized by the State Committee of Ukraine for Technical Regulation. Balloons and kriotsylindry belong to the equipment operating under pressure, not medical. Now from manufacturers and suppliers need to require a declaration or certificate of conformity with technical regulations. Ukraine has already designated conformity assessment bodies that carry out data work.
MINISTRY OF HEALTH OF UKRAINE
Department of Economics and Resource
street. M.Grushevskyi, 7, Kyiv, 01601.tel.: (044) 253-61-94,
e-mail: email@example.com, web: http://www.moz.gov.ua, enterprise code 00012925
11.03.2013 № 09-06/238
Press Service of the Ministry of Health of Ukraine
In a letter of the State Service of Mining Supervision and Industrial Safety of Ukraine from 29.12.2012, the № 11969/0/7.1-6/6/12 to replace oxygen tanks to safer equipment to prevent accidents and injuries cases, the use of oxygen in health care, Health of Ukraine gave the Minister of Health of the Autonomous Republic of Crimea, heads of major departments (departments) of regional health administrations, the Department of Health and Department of Kievan healthcare I Sevastopol city state administrations, heads of institutions and entities that are under the control of Ministry of Health of Ukraine to consider and submit proposals on the possibility of implementing a more secure facility with appropriate reasonable estimates (in particular the cost of preparation and training, the costs of appropriate security measures labor costs of premises in which the equipment is placed, the calculation of technical documentation; probable time upgrading with modern equipment, etc.). Department of Health reported that currently in most health care settings does not use oxygen tanks. To replace oxygen tanks purchased and used oxygen concentrators and cryogenic cylinders that are certified in Ukraine.
Cylinders of oxygen in the rooms are not. Filling cylinders made of certified companies. Permissions OSH to operate oxygen tanks.
Orders to medical institutions designated person responsible for the safe operation of vessels , working under pressure. Conducts briefings and annual re-testing employees serving Oxygen items.
Oxygen cylinders stored in accordance with the rules and safety. In oxygen systems installed Attorneys gauges with a suitable calibration terms. Conducts periodic calibration of pressure gauges. Annual flushing and hydraulic testing of oxygen supply by licensed companies.
For hospitals that use oxygen tanks being discussed to replace them at cryogenic cylinders and (or) oxygen concentrators.
Director of the Department of Economics and resourcing W. Duda
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