Fire arrester diagrams. Equipment for tanks Fig.2

Description

Fire arresters, flame arresters and fire fuses are used as fire-fighting equipment on vertical tanks for storing explosive petroleum products.

This equipment is the first stage of anti- fire safety, which helps protect tanks and stored product from explosion and fire. Basics purpose of fire arresters of various types is to prevent a spark or flame from entering the gas space of the container and causing fire hazards.

Operating principle of fire arresters and flame arresters

Their work is based on the absorption of heat from a spark or flame: the cassettes included in the design are made of various materials reduce thermal energy below the flash point or ignition temperature of the stored liquid. In this case, there is no delay in the working product through the cassette.

Fire retardant elements (cassettes, tapes) can be made of foil, copper or aluminum alloys.

Types of fire arresters and flame arresters

• fire arrester OP-AA
• fire arrester OP-AAN
• flame arrester PP
• liquid fire fuse
• fire communication fuse POC

Fire arresters OP

Fire barriers OP-AA and OP-AAN protect the gas space of tanks from penetration of sparks or flames. The fire-retardant element located in the housing consists of corrugated and flat tapes that retain heat from the fire and extinguish it. Aluminum is used for their manufacture. The fire arrester OP-AAN is dismountable, which allows the cassette to be inspected and replaced if necessary.

Fire arrestor OP-AAN	Options		OP 50AAN	OP 80AAN	OP 100AAN	OP 150AAN	OP 200AAN	OP 250AAN	OP 300AAN	OP 350AAN	OP 500AAN
	Conditional passage DN		50	80	100	150	200	250	300	350	500
	Passport ability with resistance lenition air flow 118 Pa, m 3 / h		100	150	200	215	380	600	750	900	2200
	Height, H, mm		172	200	197	231	255	243	275	419	317
	Diameter, Dн, mm		160	214	230	303	375	450	530	610	858
	Join body dimensions, mm	D D1 d n, pcs.	141 110 14 4	184 150 17 4	205 170 17 4	262 225 18 4	315 280 18 4	370 335 18 6	435 395 22 6	485 445 22 6	644 600 22 16
	Time conservation work- capabilities, min., not less		10
	Weight, kg, no more		3	5	6,1	10	16	27	30	45	74

Flame arrestor PP

PP flame arresters are temporary fire arresters that prevent flames from penetrating into the gas space of tanks. Attached using flanges to mounting pipes; A gasket is installed between the flange and the body, which ensures tightness.

The fire retardant element is made of flat or corrugated tapes and can be made of aluminum or stainless steel. Fixed time The service life of PP flame arresters made of aluminum alloys is 5 years, and those made of stainless steel are 10 years.

Fire liquid fuses POZH

Liquid fire arresters are used to prevent possible storage tank fires diesel fuel or gasoline, which may occur when gas or vapor escapes into the atmosphere. They can be made in cast iron or aluminum housing. The blocking element is made of aluminum tapes, which accumulate the heat of the flame and extinguish it.

Installation is carried out on the receiving pipeline.

Liquid fire fuse POZH	Options	POZH-80
	Conditional diameter, D	80
	Pressure, MPa	0,25
	Capacity versus resistance air flow 118 Pa, m³/h	80 - 100
	Height (H), mm	94
	Diameter (D), mm	207
	Diameter of mounting holes	18
	Number of mounting holes	4
	Diameter of mounting holes	170
	Weight, kg	3,6
	Serviceability retention time, min., not less	10
	Established service life, years	8

Communication fire fuse POK

Fire fuses POK are installed on oil pipelines to prevent the movement of flame along it. Maximum pressure in the pipeline - up to 1.6 MPa.

Their design is more reinforced, since the movement of the working medium occurs at high speed and at high blood pressure. Having minimal hydraulic resistance, the liquid flows freely.

The fire retardant element has high heat resistance and fire resistance. As the flame passes through the flame-extinguishing element, the temperature drops below the flash point of the working product. Due to this, extinction occurs.

Fire fuses POK are manufactured in climatic versions U and UHL of placement category 1.

Communication fire fuse POK	Options		POK-50	POK-80	POK-100	POK-150	POK-200	POK-250	POK-300	POC- 350	POC- 500
	Conditional passage DN		50	80	100	150	200	250	300	350	500
	Passport ability with resistance phenomenon air flow 118 Pa, m 3 / h		25	75	100	215	380	600	300	900	2950
	dimensions, mm	D.H.	215	245	280	335	460	520	600	710	840
		H	300	303	380	430	490	495	575	737	820
	Join body dimensions, mm	D	160	195	215	280	335	405	460	520	710
		D1	125	160	180	240	295	355	410	470	650
		d	18	18	18	22	22	26	30	26	33
		n	4	8	8	8	12	12	12	16	20
	Weight, kg, no more		20	28	39	55	113	145	245	290	545

Installation of fire arresters

They are mounted on the roof of vertical tanks under the breathing or safety valve and are attached to the mating flanges using bolts through a gasket. To protect pipelines under pressure up to 1.6 MPa, they are installed on site possible exit gas-air mixture.

In various industries that can be classified as fire and explosion hazards, at gas stations, at oil refineries and in the gas pipeline industry, special equipment is needed that will prevent. This equipment, common today, is the so-called fire arresters. Fire arresters are usually installed in all places where there is a danger of explosion and fire. Namely, on gas pipelines, on tanks containing flammable materials, and other similar places.

Types of fire arresters

Fire arresters can be divided into structural types, namely, they can be made with a nozzle equipped with material granular type. Next type fire arresters is a fire arrester of directly heated type. Another type is a fire retardant, which is made of a material such as metal fiber or metal ceramics. And finally, another type of fire arrester is a mesh fire arrester.

The fire arrester, which belongs to the first type, has this design. In its body base there is a nozzle, which is located in the middle of the gratings; this nozzle contains a special filling composition, consisting, as a rule, of elements such as small glass or porcelain balls, gravel material, corundum and other similar materials.

A cassette type fire arrester has a housing design in which a roll consisting of metal strips is mounted, one of which has a corrugated surface, the other is simply straight. The body of a plate-type fire arrester includes a stacked set of metal plates, which are arranged in a certain order and in strict accordance with each other.

Fire arresters - device and design

These plates have flat shape and are located parallel to each other. If the fire arrester has a mesh type of construction, then its parts made of metal are located close to each other. These parts are meshes made of metal. And finally, a metal-ceramic fire arrester looks like this. A disc-shaped part is mounted in its body base; this part has a porous structure and is made of either metal ceramics or metal fiber.

The most common fire arresters today are mesh type barriers. This type already used enough a large number of time and has proven itself with best side. They are most widespread in burning fuel mixtures installations. In these barriers, the working element itself, which is responsible for fire safety, is made of many meshes, the cells of which are about 0.25 millimeters, and these elements are made of brass. The entire working element is mounted in a holder, which has a removable design.

Today, a type called liquid-type fire arresters has also become widespread. These elements perform the same functions as those listed above, however, they must also perform additional work. Namely, to protect installations from the blast wave and create an obstacle to its spread. Prevent the ingress of flammable mixtures into the wire, namely, protect against the ingress of oxygen and air masses. And also create virtually no resistance to gas flows.

Purpose

The fire arrester OP (AAN) is installed between the vertical tank and the safety or breathing valve. The fire arrester OP is designed to protect a vertical tank from the penetration of fire (flame or spark) into the gas space through breathing valves (vent pipes or safety valves), thereby protecting oil from a flash or explosion.

Specifications

TU 3689-014-10524112-2002 corresponds to:

• AOMZ TU 63-RSFSR68-75;
• NGM Group 3689-016-79167039-2006.

Design and principle of operation

The principle of operation of the fire arrester OP is based on flame retardation by a cassette placed inside the housing. The cassette consists of a package of alternating corrugated and flat plates, forming small-diameter channels. The flame, entering the channels of small cross-section, is split into separate small streams. The contact surface of the flame with the fire arrester OP increases, heat transfer to the channel walls increases, and the flame goes out. The design of the fire arrester OP is collapsible, which allows you to periodically remove the cassettes for inspection and monitoring their condition.

The basis of the design is a fire-retarding element 2, placed between two halves of the body 1, pulled together by four pins 3. The fire-retardant element consists of flat and corrugated tapes wound on an axis, which also protects the element from falling out.

The extinguishing effect of the fire arrester OP, installed on the roof of an RVS-type tank, is based on the principles of intense heat exchange that occurs between the walls of the narrow channels of the fire-retardant element and the gas-air flow passing through it. This achieves a reduction in the temperature of the gas-air flow to safe limits.

1 - body consisting of two halves; 2 - fire-retarding element; 3 - four connecting pins.

Specifications

* OP products with conditional passage DN 50 (DN 80), upon customer request, can be manufactured for a tongue-and-groove flange connection. A groove is made in the flange(s) of the products. At the customer's request, the product can be equipped with mating flanges in accordance with GOST 12815. Sealing gaskets are not supplied.

GOST R 53323-2009

NATIONAL STANDARD OF THE RUSSIAN FEDERATION

FIRE ARRESTERS AND SPARK ARRESTERS

Are common technical requirements. Test methods

Flame arrestors and spark arrestors. General technical requirements. Test methods

OKS 13.220.20

Date of introduction 2010-01-01
with the right early application*
______________________
*See Notes label

Preface

Preface

1 DEVELOPED by the Federal State budgetary institution"All-Russian Order of the Badge of Honor" Research Institute of Fire Defense" Ministry Russian Federation on business civil defense, emergency situations and liquidation of consequences natural Disasters(FGBU VNIIPO EMERCOM of Russia)

2 INTRODUCED by the Technical Committee for Standardization TC 274 "Fire Safety"

3 APPROVED AND ENTERED INTO EFFECT by Order of the Federal Agency for Technical Regulation and Metrology dated February 18, 2009 N 99-st

4 INTRODUCED FOR THE FIRST TIME

5 REPUBLICATION. July 2019


The rules for the application of this standard are established in Article 26 of the Federal Law of June 29, 2015 N 162-FZ "On Standardization in the Russian Federation" . Information about changes to this standard is published in the annual (as of January 1 of the current year) information index "National Standards", and the official text of changes and amendments is published in the monthly information index "National Standards". In case of revision (replacement) or cancellation of this standard, the corresponding notice will be published in the next issue of the monthly information index "National Standards". Relevant information, notices and texts are also posted in information system common use- on the official site Federal agency on technical regulation and metrology on the Internet (www.gost.ru)

1 area of ​​use

1.1 This standard applies to fire arresters and dry-type spark arrestors and establishes general technical requirements for these devices, as well as test methods.

1.2 This standard does not apply to:

- for liquid safety valves;

- fire arresters installed on technological equipment, which is associated with the circulation of flammable substances prone to explosive decomposition without an oxidizer.

1.3 This standard should be used in the design and manufacture of fire arresters and spark arresters, as well as during certification tests in the field of fire safety and other types of tests established by current standards and regulatory and technical documentation.

2 Normative references

This standard uses normative references to the following standards:

GOST 2.114 one system design documentation. Specifications

GOST 12.2.047 System of occupational safety standards. Fire equipment. Terms and Definitions

GOST 15.001 * System for developing and putting products into production. Products for industrial and technical purposes
________________
* No longer valid. GOST R 15.301-2000 is in force.

Probably an error in the original. Should read: GOST R 15.201-2000. - Database manufacturer's note.


GOST 2991 Non-dismountable plank boxes for cargo weighing up to 500 kg. General technical conditions

GOST 8273 Wrapping paper. Specifications

GOST 14192 Marking of cargo

GOST 14249 Vessels and apparatus. Standards and methods for strength calculations

GOST 15150 Machines, instruments and others technical products. Versions for different climatic regions. Categories, conditions of environmental climatic factors

GOST 18321 Statistical quality control. Method of random selection of samples of piece goods

GOST 19729 Ground talc for the production of rubber products and plastics. Specifications

GOST 23170 Packaging for mechanical engineering products. General requirements

GOST R 8.585 State system ensuring uniformity of measurements. Thermocouples. Nominal static conversion characteristics

Note - When using this standard, it is advisable to check the validity of the reference standards in the public information system - on the official website of the Federal Agency for Technical Regulation and Metrology on the Internet or using the annual information index "National Standards", which was published as of January 1 of the current year, and on issues of the monthly information index "National Standards" for the current year. If a reference standard to which an undated reference is given is replaced, it is recommended that the current version of that standard be used, taking into account all changes made to it. this version changes. If a dated reference standard is replaced, it is recommended to use the version of that standard with the year of approval (adoption) indicated above. If, after the approval of this standard, a change is made to the referenced standard to which a dated reference is made that affects the provision referred to, it is recommended that that provision be applied without regard to that change. If the reference standard is canceled without replacement, then the provision in which a reference to it is given is recommended to be applied in the part that does not affect this reference.

3 Terms and definitions

The following terms with corresponding definitions are used in this standard:

3.1 dry type fire retardant: A device installed on a fire-hazardous technological apparatus or pipeline that freely passes the flow of a gas-vapor-air mixture or liquid through a flame-extinguishing element and helps localize the flame.

3.2 dry type spark arrestor: A device installed on the exhaust manifolds of various Vehicle, power units and ensuring the capture and extinguishing of sparks in combustion products generated during the operation of furnaces and engines internal combustion.

3.3 time to maintain operability when exposed to flame: The time during which the fire arrester (spark arrestor) is able to remain operational when heated by a stabilized flame on the flame extinguishing element during combustion of the gas-vapor-air mixture passing through the fire arrester (spark arrestor).

3.4 flame retardant element: A structural element of a fire arrester, the direct purpose of which is to prevent the spread of flame.

3.5 fire arrester body: A structural element of a fire arrester that provides placement of a flame extinguishing element and mechanical interface with external devices.

3.6 critical diameter of the flame retardant element: The minimum diameter of the flame-extinguishing element channel through which a flame of a stationary vapor-gas mixture can propagate.

3.7 safe diameter of the flame extinguishing element channel: The design diameter of the flame-extinguishing element channel, selected taking into account the safety factor.

4 Classification of fire arresters and spark arrestors

Fire arresters are classified according to the following criteria: type of flame-extinguishing element, installation location, time of maintaining operability when exposed to flame.

4.1 Based on the type of flame extinguishing element, fire arresters are divided into:

- mesh;

- cassette;

- with a flame retardant element made of granular material;

- with a flame retardant element made of porous material.

4.2 According to the place of installation, fire arresters are divided into:

- tank or end (the length of the pipeline intended for communication with the atmosphere does not exceed three of its internal diameters);

- communication (built-in).

4.3 Based on the time they remain operational when exposed to flame, fire arresters are divided into two classes:

- I class - time not less than 1 hour;

- II class - time less than 1 hour.

4.4 Spark arresters are classified according to the method of extinguishing sparks and are divided into:

- dynamic (exhaust gases are cleared of sparks under the influence of gravity and inertia);

- filtration (exhaust gases are purified by filtration through porous partitions).

5 Technical requirements

5.1 Fire arresters and spark arresters must comply with the requirements of this standard, GOST 12.2.047, GOST 14249, GOST 15150, as well as others regulatory documents approved in in the prescribed manner.

5.2 The body of the fire arrester (spark arrestor) and the flame extinguishing element must be free of dents, scratches and defects in the anti-corrosion coating.

5.3 The weight and size characteristics of the fire arrester (spark arrestor) must correspond to the values ​​specified in technical documentation.

5.4 The technical documentation for the fire arrester (spark arrestor) must indicate the types combustible mixture, which the product is intended to protect, and the conditions of use (pressure, temperature).

Structural elements fire arrester (spark arrestor) must withstand the force loads that occur during the spread of flame, with the pressure for which the product is designed.

5.5 The fire arrester (spark arrestor) must be operational throughout the entire period of operation in the temperature range specified in the technical documentation.

5.6 Design of a fire arrester (spark arrestor) intended for use in negative temperatures environment, must exclude the possibility of freezing of water (moisture) in the channels of the flame-extinguishing element.

5.7 The design of the fire arrester must ensure the possibility of its periodic cleaning if the device is intended to operate in the presence of mechanical impurities or liquid vapors prone to crystallization or polymerization in the gas flow or liquid.

5.8 The body of the fire arrester (spark arrestor), as well as detachable and permanent connections must ensure tightness (should not allow flames, sparks and combustion products to pass through) not lower than the tightness of the protected device.

5.9 The size of the slot gaps between the wall of the fire arrester (spark arrestor) body and the flame arresting element must not exceed the safe diameter of the channel.

5.10 Fire arresters (spark arrestors) must be resistant to external and internal corrosive effects of the environments in which they are intended.

5.11 The design of the fire arrester (spark arrestor) must provide for the possibility internal inspection, replacement of the flame retardant element, ease of installation.

5.12 Structural elements of the fire arrester (spark arrestor) should not be deformed when flaming combustion is localized for a time equal to the time it remains operational when exposed to flame.

5.13 When granular material is used in fire arresters (spark arrestors) as a flame extinguishing element, the granules must have a spherical or similar shape.

Granules must be made of heat-resistant and corrosion-resistant materials.

5.14 The diameter of the flame arrester element of the fire arrester (spark arrestor) should be no more than 50% of its critical diameter.

5.15 The design of the fire arrester (spark arrestor) must ensure its reliable fixed mounting on the process equipment or exhaust manifold, taking into account vibration loads acting during the entire period of operation.

5.16 The following technical documentation must be attached to the manufactured fire arrester (spark arrestor):

- technical passport for the product;

- manual.

5.17 The maximum surface temperature of the spark arrester body placed in a flammable environment (flammable gases, vapors, aerosols, dust) must be at least 20% lower than the self-ignition temperature of the specified flammable substances.

5.18 The time for maintaining the functionality of the communication fire arrester when exposed to flame must comply with the requirements specified in the technical documentation for the product, but not less than 10 minutes.

5.19 The design of the fire arrester (spark arrestor) must provide for the possibility of sealing detachable connections(except for fasteners) in order to control its integrity.

5.20 The fire arrester (spark arrestor) must remain operational:

- in case of vibration impacts arising during operation. The limits of their change must be established by the manufacturer and indicated in the technical documentation for the product;

- within the operating and storage temperature ranges that must be established by the manufacturer and specified in the technical documentation for the product.

5.21 The fire arrester (spark arrestor) must be replaced if the flame-extinguishing element is damaged, as well as if cracks or dents appear on the body.

5.22 The performance of the fire arrester (flame extinguishing element) must be confirmed every 2 years of operation by testing the ability of the fire arrester to localize a flame.

6 Marking of fire arresters and spark arrestors

Marking of fire arresters and spark arresters must be done in Russian and contain the following data:

- functional purpose(type of flame retardant element, recommended installation location and product class);

- types of flammable mixtures for which the product is intended to protect;

- nominal diameter of the outlet;

- temperature regime operation;

- operating pressure;

- time to maintain operability when exposed to flame;

- weight;

- date of manufacture;

- trademark or the name of the manufacturer;

- TU number.

7 Acceptance rules

7.1 To monitor the compliance of the fire arrester (spark arrestor) with the requirements of this standard, tests are carried out: acceptance, periodic, certification and standard.

All tests, unless otherwise specified by this standard, must be carried out under normal climatic conditions established by GOST 15150.

7.2 Acceptance tests of fire arresters (spark arrestors) are carried out in accordance with GOST 15.001 on samples of a pilot batch according to a program developed by the manufacturer and developer.

A batch is defined as the number of products accompanied by one document.

7.3 Periodic tests are carried out in order to monitor product quality indicators and the possibility of continuing production of the product. Selection of samples for testing is carried out according to GOST 18321. Periodic testing 2% of the quantity of produced fire arresters (spark arrestors) are subjected monthly, but not less than four samples of each standard size.

7.4 Type tests are carried out when design or other changes are made (manufacturing technology, material, etc.) that can affect the main parameters ensuring the operability of the fire arrester (spark arrestor). The test program is planned depending on the nature of the changes and is agreed with the developer.

For standard tests, at least five samples of fire arresters (spark arrestors) of each type are selected.

7.5 Certification tests are carried out in order to establish compliance of the characteristics of the fire arrester (spark arrestor) with this standard, as well as to issue a fire safety certificate. For certification tests, three samples of fire arresters (spark arrestors) of each type are selected.

7.6 The scope of acceptance, periodic and certification tests is given in Table 1.

Table 1 - Scope of testing of fire arresters and spark arresters

7.7 If negative results are obtained for any type of test, the number of samples tested is doubled and the tests are repeated in full. If negative results are received again, further testing should be stopped until the causes are identified and the detected defects are eliminated.

8 Test methods

8.1 All tests (unless there are special instructions) are carried out at an ambient temperature corresponding to the temperature range of operation of the fire arrester.

8.2 Test equipment, stands and measuring instruments used when testing fire arresters (spark arrestors) must have a passport and undergo metrological control in the prescribed manner. Indicated in the passport specifications equipment and stands must provide the test regimes established by this standard.

8.3 Compliance of the parameters of the fire arrester (spark arrestor) with the requirements of 5.2, 5.3 is checked by technical inspection and/or analysis of technical documentation according to Table 1 using the appropriate measuring instrument. The accuracy class of the measuring instrument is determined according to the technical documentation.

8.4 The mass of the fire arrester (spark arrestor) and the mass of the flame extinguishing element are determined on the scales with an error not exceeding 2%. To do this, first weigh the fully equipped fire arrester (spark arrestor), after which it is disassembled and the flame-extinguishing element is weighed. If the product, in accordance with the requirements of technical documentation, is not subject to disassembly, then only the mass of the fire arrester (spark arrestor) with the flame extinguishing element is determined.

8.5 Tests to determine the ability of a fire arrester to localize a flame and the ability of a spark arrestor to prevent ignition are carried out on an experimental bench. Schematic diagram The experimental stand is shown in Figure 1.

For testing use:

a) a test bench consisting of two chambers (combustion and control). The equipment of the stand must withstand the pressure generated during testing.

The combustion chamber must also be equipped with fittings to accommodate a pressure sensor and an ignition source.

The control chamber must also be equipped with fittings to accommodate a pressure sensor and an ignition source. The capacity of the control chamber must exceed the capacity of the combustion chamber by at least 5 times;

b) system technical devices, ensuring the production of a gas-vapor-air mixture based on the partial pressures of the components with an error of no more than 0.5% (vol.). The system should include the following equipment:

- mixing chamber;

- evaporator;

- container with flammable, flammable liquid or flammable gas;

- air compressor;

- pipelines with valves.

The partial pressure of the gas component is determined by the formula

where is the volume concentration of the th gas component, % (vol.);

- total pressure in the mixing chamber, kPa.

The mixing chamber must ensure that the combustion chamber and control chamber are filled with the required gas-vapor-air mixture at the pressure and temperature values ​​specified for testing;

1 - flammable gas cylinder; 2 - compressor; 3 - gas remote control; 4 - mixer; 5 - spark plugs; 6 - reaction tube; 7 - ignition unit; 8 - flame extinguishing element of the fire arrester; 9 - control tank; 10 - pressure sensor; 11 - vacuum pump

Figure 1 - Schematic diagram of the experimental stand

c) an ignition source that ensures ignition of the gas-vapor-air mixture;

d) a system for recording the ignition of the gas-vapor-air mixture.

The ability of a fire arrestor to localize a flame and the ability of a spark arrestor to prevent ignition are determined using the types of combustible mixtures they are intended to protect. It is allowed to carry out tests on model combustible mixtures, which in terms of normal burning rate are close to the specified mixtures for which the product is intended.

The fire arrester (spark arrestor) is installed and secured on the stand in accordance with the requirements of technical documentation in such a way as to ensure the tightness of the tested product and fire chambers.

The control chamber and the combustion chamber of the test bench are filled with a gas-vapor-air mixture of a given concentration.

The devices for registering the ignition of the gas-vapor-air mixture are started and the ignition source in the combustion chamber is turned on.

The criterion for ignition of the gas-vapor-air mixture in the control chamber is considered to be an increase in excess pressure in it by at least 2 times compared to the initial pressure.

If there is no ignition of the gas-vapor-air mixture in the control chamber, it is considered that the fire arrester (spark arrestor) has passed the test.

The test results are considered positive if, in three consecutive tests, no breakthrough of a flame (spark) through the flame arrester element or a spark through the spark arrester filter element is recorded.

8.6 If the fire arrester is designed to operate at atmospheric pressure, tests to determine the ability of the fire arrester to localize a flame and the spark arrestor to prevent ignition may be carried out without a control combustion chamber. The process of the flame (spark) breaking through the flame arrester element of the fire arrester is recorded visually, using as an indicator the ignition of gasoline poured into a pan, which is located directly at the outlet of the fire arrester (spark arrestor) at the flame arrester element.

8.7 Tests of the fire arrester (spark arrestor) for tightness are carried out in accordance with the "Rules for the design and safe operation of pressure vessels".

8.8. The maximum surface temperature of the spark arrestor body is determined by testing on the exhaust manifolds of vehicles and power units on which spark arresters are installed, or on equipment that simulates the operating conditions of furnaces and internal combustion engines, at the rated power of the power unit.

For testing use:

- thermoelectric converters of the TXA type in accordance with GOST R 8.585 with a diameter of no less than 0.5 mm and no more than 1.5 mm. Three electrical thermal converters are installed on each spark arrester: two at the input and output of the spark arrester; the third - in the central part of the spark arrestor body;



Test procedure:

- the spark arrester is placed on the exhaust manifold of the power unit;

- turn on the power unit and bring it to the operating mode corresponding to the rated power;

- record the temperature readings of each thermoelectric converter for 1 hour at continuous operation power unit in a mode corresponding to the rated power.

Based on the measurement results, the maximum temperature value is determined from the readings of three thermoelectric converters, which is taken as maximum temperature surface of the spark arrester housing.

8.9 Tests for the vibration strength of the fire arrester (spark arrestor) are carried out on a vibration stand of the VEDS-200 (400) type or another type with similar characteristics.

Fire arresters (spark arrestors) are attached to the movable platform of the vibration stand. Tests are carried out along each of the three coordinate axes with a frequency of at least 40 Hz and an amplitude of at least 1 mm, the test duration in each direction is at least 40 minutes.

After vibration impacts on all three axes, the ability of fire arresters to localize flames and spark arrestors to prevent ignition is determined in accordance with 8.5.

8.10 The time the fire arrester remains operational when exposed to flame is determined by the time interval during which the fire arrester retains the ability to localize the flame. The time to maintain operability when exposed to flame is determined for fire arresters that have passed tests for the ability to localize a flame.

For testing use:

- test bench, described in 8.5. Two fire arresters are attached to the ends of the combustion chamber: one at the inlet, the other - a test one - at the outlet. A fire arrester placed at the inlet prevents the spread of flame from the combustion chamber to the mixer. The fire arrester, located at the entrance to the control chamber, is supplied with a flammable mixture from the mixing chamber. The mixing chamber must be of a flow type and ensure combustion of the combustible mixture on the surface of the flame arrester element attached at the outlet of the combustion chamber. The supply of the combustible mixture must be continuous and be 10, 40, 70 and 100% of the nominal bandwidth products. The number of tests carried out at each of the specified feed values ​​is assumed to be 2;

- electrical thermal converters TXA in accordance with GOST R 8.585 with a diameter of no less than 0.5 mm and no more than 1.5 mm. Two electrical thermal converters are placed on the tested fire arrester, installed at the exit of the combustion chamber: at the input and output, directly in the central part of the flame arresting element;

- secondary devices for measuring temperature in the range from 0°C to 1300°C, having an accuracy class of 0.5.

Testing:

- the combustible mixture is supplied from the mixing chamber to the fire arrester being tested (the supply corresponds to 10% of the nominal throughput of the product) and it is ignited at the outlet of the flame arrester element;

- record the temperature readings of each electrical thermal converter.

Based on the results of measuring the readings of electrical thermal converters, the time interval during which no flame propagation throughout the product is observed is determined.

The criteria for flame propagation along a fire arrester are:

The appearance of a flame at the outer surface of the fire arrester body, as well as the formation of cracks, burnouts and other through holes not specified in the design documentation;

- disappearance of the flame near the surface of the flame arrester element, recorded visually and using a signal from an electrical thermal converter located at the output of the fire arrester;

- the appearance of a flame at the entrance to the fire arrester being tested, recorded using a signal from an electrical thermal converter placed at the entrance to the flame extinguishing element.

The tests are repeated with a continuous supply of the combustible mixture at a flow rate of 10, 40, 70 and 100% of the rated capacity of the fire arrester, and the minimum time for the entire test cycle is determined during which no flame spread throughout the product is observed.

The maximum test duration should not exceed 70 minutes.

9 Completeness

The delivery package should include:

- fire arrestor (spark arrestor);

- instruction manual combined with a passport.

At the request of organizations involved in the maintenance of the fire arrester (spark arrestor), the manufacturer must send instructions for maintenance, a list of spare parts, tools and accessories that can be ordered at this enterprise.

Note - By agreement with the customer, it is possible to change the complete set of fire arresters supplied to protect a specific object.

11.1 Design documentation for a fire arrester (spark arrestor) must be drawn up in accordance with the requirements of current regulatory documents and adjusted based on test results with the assignment of the letter A in the prescribed manner.

11.2 Technical specifications for a fire arrestor (spark arrestor) must be developed in accordance with the requirements of GOST 2.114.

11.3 Each fire arrester must be provided with an instruction manual. The instruction manual, combined with the passport, must contain information that allows the consumer to correctly install and use the fire arrester (spark arrestor).

The instruction manual should include the following sections:

- title page;

- purpose and main technical characteristics of the fire arrester;

- contents of delivery;

- design and principle of operation of the fire arrester (with the necessary graphic materials);

- instructions on safety measures when working with a fire arrester (spark arrestor). Warning about possible harmful effects of the protected technological environment on the human body when using this fire arrester (spark arrestor);

- the procedure for operating the fire arrester (spark arrestor), which must indicate the rules for installing the fire arrester (spark arrestor) on the protected object, the frequency and scope of inspections, tests of the fire arrester (spark arrestor), values ​​and tolerances for changing parameters that are monitored during inspections;

- procedure for transportation and storage of fire arrester (spark arrestor);

- available certificates (numbers, who issued them and until what time they are valid);

- certificate of acceptance and certificate of sale of fire arrester (spark arrestor);

- warranty obligations of the manufacturer;

- forms of tables filled in when maintenance fire arrester (spark arrestor).

Electronic document text
prepared by Kodeks JSC and verified against:
official publication
M.: Standartinform, 2019