Decree No. 12 / 1994 Coll.
Order of the Czech Mining Authority laying down requirements for isolation self-rescue devices with chemically bonded oxygen
Valid
Effective from 01.03.1994
12
DECLARATION
Czech Mining Office
of 28 December 1993
laying down requirements for isolation self-rescue devices with chemically bonded oxygen
The Czech Mining Office provides pursuant to § 6 (6) (a) of the Act of the Czech National Council No. 61 / 1988 Coll., on Mining Activities, Explosives and on State Mining Administration:
INTRODUCTORY PROVISIONS
Scope
This Decree lays down requirements for isolation self-rescue devices with chemically bonded oxygen ("self-rescue devices') intended to be used for the escape of persons from premises with non-breathable air during mining and mining activities.
Basic provisions
(1) Only a type of self-rescue device which complies with the requirements of this Decree in its whole and individual parts may be used for activities under Section 1. Compliance shall be established on the basis of the results of the control tests. Control tests are used for standardised and reproducible verification of selected technical parameters of the apparatus or parts thereof.
TECHNICAL REQUIREMENTS
Description of self-rescue device
The self-rescue device is designed so that the exhaust air is driven from the mouth to a circuit that contains an appropriately encapsulated regenerative mass absorbing carbon dioxide and water vapour and releasing oxygen. The air is then carried into the breath bag from which they are again inhaled. The excess air is carried through a pressure valve into the air.
Withdrawal period
(1) For each type of self-rescue device, the manufacturer shall indicate the protective period which shall be indicated in the technical documentation supplied with the apparatus.
(2) The protective period is verified by a test of protective time on a test device with artificial lungs. In addition, the apparatus shall be subjected to practical functional tests which are as similar as possible to those in practice.
(3) Self-rescue devices are divided into:
(a) self-rescue devices with a protective period of up to and including 30 minutes;
(b) self-rescue devices with a protective period exceeding 30 minutes.
(4) Self-rescue devices referred to in paragraph 3 (a) must be designed for permanent carrying on the body. Therefore, they shall be suitably shaped and equipped with a belt (belt) or other suitable strap allowing the unhardy and safe wearing of the apparatus on the body at all work and activities.
Basic design requirements
(1) The self-rescue device must be a round and compact structure excluding sharp corners and edges.
(2) The self-rescue device must be sufficiently resistant to mechanical damage during transmission, transport, storage and storage as well as in its own use.
(3) The design of a self-rescue device shall allow quick, simple and unburdened opening and deployment, even under difficult conditions, for example in darkness and in a limited space.
(4) A self-rescue device must ensure protection of the breathing system of the worker in peace and in the event of leakage.
(5) During the use of a self-rescue device, aerosols, money or pairs of chemical agents or structural materials may not enter the worker's breathing organs in quantities which could cause irritant or significantly repulsive effects or cause injury.
(6) The design of the self-rescue device shall, while complying with the instructions for use, exclude the possibility of burning the user with a heated part of the apparatus.
(7) Self-rescue apparatus and all parts thereof which come into contact with the external environment must have characteristics such that they cannot cause the ignition of flammable gases and vapours.
(8) Self-rescue apparatus and parts thereof must be resistant to corrosion, climatic and working environment effects.
(9) A self-rescue device intended for an environment below 0 ° C or for a mine with a risk of rock, coal and gas bursts shall have a trigger device.
Requirements for component construction
(1) The housing of the self-rescue device must guarantee the tightness of the device throughout the useful period. The design of the apparatus shall allow for periodic leakage control.
(2) If the self-rescue device is designed as a mouthpiece, the mouthpiece shall guarantee a reliable tightness. The nasal clamp shall be flexibly attached to the mouthpiece and shall allow sufficient sealing of the nose.
(3) The hose shall be made of flexible and sufficiently flexible material which resists oxygen ageing throughout the useful life of the rescue device. It must not restrict the movement of the head.
(4) The breathing bag shall be made of elastic, solid material which resists oxygen ageing and is dust resistant to developing matter. It must not be glued even in long-term storage and must not be unglued when or after use of the apparatus. The useful volume of the bag shall not be less than five litres.
(5) The self-rescue device must be equipped with a pressure relief valve automatically operating within a pressure range of 0,1 to 0,35 kPa. In the case of apparatus equipped with a trigger device, the valve resistance shall not exceed 0,6 kPa when the air flow is 60 l.min-1.
(6) If the self-rescue device is equipped with breathing valves, these must be reliably controlled by the respiratory circuit.
(7) The safety-belt shall be easily and quickly open and shall exclude the possibility of accidental opening. The lock breach shall be easily detectable on the self-rescue device. The force applied to remove each element of the lock and to separate the part of the lock and the packaging shall not exceed 300 N.
(8) The triggering device, if equipped with it, shall release at least 3,5 l of oxygen within 40 seconds after starting.
Technical requirements
(1) The sum of breath and breath resistors measured during the protection test shall not exceed the following values:
(a) for apparatus referred to in Article 4 (3) (a), 1,6 kPa, the maximum individual resistance shall not exceed 1,0 kPa;
(b) for apparatus referred to in Article 4 (3) (b), 1,3 kPa, the maximum individual resistance shall not exceed 0,75 kPa.
(2) The temperature of the air directly measured in the annular part connection must not exceed 55 ° C throughout the protective period test.
(3) Oxygen concentrations in the inhaled air may fall to 17% in the short term within two minutes of the start of the test, otherwise they may not fall below 21% during the protective test.
(4) The concentration of carbon dioxide in the inhaled air shall not exceed an average of 1,5% during the protective test, but in no case shall it exceed 3,0%.
Resistance requirements
(1) Self-rescue devices must have sufficient mechanical resistance and must be sufficiently resistant to increased and reduced temperatures.
(2) The self-rescue device must withstand the mechanical effects of transport, carrying, storage, and use sufficiently.
(3) The self-rescue device and all parts thereof must be reliably operational at the increased or reduced temperatures to which it might be exposed.
Labelling requirements
(1) Self-rescue devices of the same type (model) shall bear, with the exception of the requirements referred to in paragraph 2, the same marking which shall be visible even without opening the apparatus.
(2) The designation referred to in paragraph 1 shall include the serial number and serial number, and, where appropriate, the year and month of manufacture.
(3) The marking shall be durable and visible throughout the use of the survival device. Instruments with unreadable or incomplete markings shall not be used.
(4) The marking referred to in paragraph 2 shall be maintained on the life-saving device even after it has been opened and used.
Instructions for use and instructions
(1) Instructions for use in the Czech language must be available for each type of life-saving device.
(2) The instructions for use shall be clear and contain all relevant information sufficient for the person trained in the use of self-rescue apparatus for the safe handling of the apparatus. The following must be mentioned by name:
(a) the use of the apparatus and any restrictions (time, temperature, etc.);
(b) check on receipt of the apparatus,
(c) the obligation to lose the apparatus;
(d) prohibited handling.
(3) An organisation using self-rescue devices shall have at its disposal instructions containing basic technical parameters, instructions for use and instructions for the control, storage, storage and disposal of self-rescue devices, issued by a regional mining rescue station appointed by the Czech Mining Authority. The inspiration is approved by the Czech Mining Authority.
PROVISIONS TRANSITIONAL AND FINAL
Transitional provisions
(1) The values of the technical requirements under Section 7 need not be met for the types of self-rescue devices which have been approved by the Czech Mining Authority prior to the entry into force of this Decree.
(2) Self-rescue devices for which the period of use has been extended in accordance with existing rules may be used until their period of use has been extended.
Efficacy
This Decree shall take effect on 1 March 1994.
Chairman:
v. JUDr. Ing. Makarius CSc. v. r.
Director
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Regulation Information
| Citation | Order of the Czech Mining Authority No. 12 / 1994 Coll., laying down requirements for isolation self-rescue devices with chemically bonded oxygen |
|---|---|
| Regulation Type | - |
| Author | - |
| Collection | Code of Laws |
| Date of Promulgation | 20.01.1994 |
|---|---|
| Effective from | 01.03.1994 |
| Effective until | - |
| Status | Valid |
The regulation text is for informational purposes only.
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