Execution hl1. Climatic performance

When choosing this or that equipment, in addition to its functions and characteristics, you need to carefully consider the climatic design. Environmental conditions play a role important role, the reliability and service life of the equipment will depend on the correct choice of climate control. In Russia, this aspect is regulated by GOST 15150 “Executions for various climatic regions. Categories, operating conditions, storage and transportation in terms of exposure climatic factors external environment".

Decoding alphabetic and numeric values

When saying “climatic design of equipment” usually means its installation category. Below are explanations of alphanumeric abbreviations.

Climatic performance

Letter designations of climatic versions of products and explanations for them are given in table 1.

Table 1 - Climatic design of products

Climate of the macroclimatic region	Letter designation
Climate of the macroclimatic region	Russians	Latin
Products intended for use on land, rivers, lakes
Temperate climate (1)	U	(N)
Temperate and cold climate (1)	UHL (2)	(NF)
Cold climate	HL	(F)
Humid tropical climate (2)	TV	(TH)
Dry tropical climate (2)	TS	(TA)
Dry and humid tropical climate (2)	T	(T)
All macroclimatic areas on land, except for areas with a very cold climate (general climate version)	ABOUT	(U)
Products intended for use in macroclimatic areas with a maritime climate
Moderately cold maritime climate	M	(M)
Tropical maritime climate	TM	(MT)
Cold temperate and tropical maritime climate	OM	(MU)
All macroclimatic areas on land and sea, except for areas with very cold climates (all-climate version)	IN	(W)

Notes:
U and UHL products can be used in warm humid, hot dry and very hot dry climatic regions in which the average of the annual absolute maximum air temperatures is > 40 o C and/or a combination of temperature ≥ 20 o C and relative humidity ≥ 80% , observed more than 12 hours a day for a continuous period of more than two months a year;

These versions can be designated by the term "tropical version".

Installation category

Table 2 - Integrated product placement categories

Product operating conditions	Influencing factors	Designation
On outdoors	The totality of all climatic factors in a given area	1
Under a canopy or in rooms where fluctuations in temperature and air humidity do not differ significantly from fluctuations in the open air and there is relatively Free access outside air, as well as in the shell of a complete product of category 1	No direct impact solar radiation And atmospheric precipitation	2
In enclosed spaces with natural ventilation without artificially regulated climatic conditions, where fluctuations in temperature and humidity, as well as exposure to sand and dust, are significantly less than in the open air	No exposure to precipitation, direct solar radiation; significant reduction in wind; significant reduction or absence of exposure to diffuse solar radiation and moisture condensation	3
In rooms with artificially controlled climatic conditions, for example in closed heated (cooled) and ventilated rooms, including underground rooms	No exposure to direct solar radiation, precipitation, wind, sand and dust from outside air; absence or significant reduction of exposure to diffuse solar radiation and moisture condensation	4
In rooms with high humidity (for example, in unheated and unventilated underground rooms where prolonged presence of water or partial condensation on the walls and ceiling is possible)	No exposure to direct solar radiation, precipitation, wind, sand and dust from outside air; absence or significant reduction of exposure to diffuse solar radiation; Exposure to water or partial condensation	5

Table 3 - Additional product placement categories

Operating (storage) conditions for the product	Designation
For storage during operation in category 4 premises and operation both in category 4 conditions and (short-term) in others, including outdoors	1.1
For use as built-in elements inside complete products of categories 1, 1.1 and 2, the design of which excludes the possibility of moisture condensation on the built-in elements (for example, inside electronic equipment)	2.1
For use in irregularly heated rooms	3.1
For use in air-conditioned or partially air-conditioned rooms	4.1
For use in laboratory capital residential and other similar types of premises	4.2
For use as built-in elements inside complete products of categories 5, the design of which excludes the possibility of moisture condensation on the built-in elements (for example, inside electronic equipment)	5.1

Examples of decoding climate control

When you need to understand what climate the equipment is intended for:

UHL4- For moderate and cold climates, installation category 4;
TV1- For humid tropical climates, installation category 1.

When you need to clarify the required climatic design of equipment according to operating conditions:

It is assumed that the equipment will be operated at an altitude of up to 1000 m, indoors with artificial ventilation. The temperature in the room is maintained around the clock +18 o C ÷ +23 o C and humidity 55% ÷ 65% at 20 o C - equipment of all climatic versions is suitable for these criteria, but the most optimal are UHL4.1 and TV4.1;
It is assumed that the equipment will be operated at an altitude of up to 1000 m under a canopy. The annual temperature difference is -32 o C ÷ +44 o C with the lowest temperature -46 o C and the highest +45 o C (recurrence approximately once every 50 years). Highest value humidity - 90% at 25 o C. - versions U1, HL1, UHL1 are suitable for climatic conditions.

Normal values of climatic factors during operation and requirements for products

Normal values climatic factors listed below apply to the operation of products at altitudes up to 1000 m above sea level. For products operated at altitudes above 1000 m (including both above 1000 m and up to 1000 m), other values of climatic factors can be set (except for pressure and lower temperature). In this case, the upper and average temperature values for the operation of products at altitudes from 1000 m to 4300 m can be calculated by decreasing those indicated in Table 4 by 0.6 o C every 100 m.

If there is a special technical justification, confirmed by measurements of the values of climatic factors, their nominal values can be set different from those indicated below.

Ambient temperature

The ambient temperature values are given below in Table 4. For products of category 1, if their surface is heated by the sun, the upper, average and maximum operating temperature values must be taken higher than those indicated in table 4:

For surfaces that are white or silver-white - by 15 o C;
For surfaces of a different color - by 30 o C.

Requirements for ambient temperature apply to products of all designs and categories. Requirements for maximum operating air temperature values are established only for products with a high probability of failure-free operation, if this is specified in technical specifications on products (the probability of occurrence of temperature limits is 0.00001).

Table 4 - Ambient air temperature during operation

Climatic performance	Performance category	Temperature value, o C
Climatic performance	Performance category	Operating range	Limit range
U, TU	1; 1.1; 2; 2.1; 3	+40 / -45 (1)	+45 / -50 (1)
	3.1	+40 / -10 (5)	+45 / -10 (5)
	5; 5.1	+35 / -5	+35 / -5
HL	1; 1.1; 2; 2.1; 3	+40 / -60	+45 / -70
	3.1	+40 / -10 (5)	+45 / -10 (5)
	5; 5.1	+35 / -10	+35 / -10
UHL	1; 1.1; 2; 2.1; 3	+40 / -60	+45 / -70
	3.1	+40 / -10 (5)	+45 / -10 (5)
	4	+35 / +1	+40 / +1
	4.1	+25 / +10	+40 / +1
	4.2	+35 / +10	+40 / +1
	5; 5.1	+35 / -10	+35 / -10
TV	1; 1.1; 2; 2.1; 3; 3.1	+40 / +1	+45 / +1 (2)
	4	+40 / +1	+45 / +1
	4.1	+25 / +10	+40 / +1
	4.2	+45 / +10	+45 / +10
	5; 5.1	+35 / +1	+35 / +1
T, TS	1; 1.1; 2; 2.1 (6) ; 3; 3.1	+50 (8) / -10	+60 / -10 (3)
	4 (7)	+45 / +1	+55 / +1
	4.1 (7)	+25 / +10	+40 / +1
	4.2 (7)	+45 / +10	+45 / +10
	5; 5.1	+35 / +1	+35 / +1
ABOUT	1; 1.1; 2; 2.1	+50 (8) / -60	+60 / -70
	4	+45 / +1	+55 / +1
	4.1	+25 / +10	+40 / +1
	4.2	+45 / +10	+45 / +1
	5; 5.1	+35 / -10	+35 / -10
M	1; 1.1; 2; 2.1; 3; 5; 5.1	+40 / -40 (4)	+45 / -40
	4; 3.1	+40 / -10 (5)	+40 / -10 (5)
	4.1	+35 / +15	+40 / +1
	4.2	+40 / +1	+40 / +1
TM	1; 1.1; 2; 2.1; 3; 5; 5.1	+45 / +1	+45 / +1
	4; 3.1	+45 / +1	+45 / +1
	4.1	+25 / +10	+40 / +1
	4.2	+45 / +1	+45 / +1
OM	1; 1.1; 2; 2.1; 3; 5; 5.1	+45 / -40 (4)	+45 / -40
	4; 3.1	+45 / -10 (5)	+45 / -10 (5)
	4.1	+35 / +15	+40 / +1
	4.2	+40 / +1	+40 / +1
IN	1; 1.1; 2; 2.1; 3	+50 (8) / -60	+60 / -70
	3.1	+50 (8) / -10 (5)	+60 / -10 (5)
	4	+45 / -10 (5)	+55 / -10 (5)
	4.1	+25 / +10	+40 / +1
	4.2	+45 / +1	+45 / +1
	5; 5.1	+45 / -40	+45 / -40

Notes:
To fulfill the specifications, the lower operating temperature value is taken equal to -25 o C, the lower limit operating temperature value is -30 o C;

For some areas with a subtropical climate, the value is -10 o C;

For some areas in China, Turkey, Afghanistan, the value is -20 o C;

For vessels not used in the Northern regions Arctic Ocean V winter time, lower operating temperature value -30 o C;

For operational storage and transportation, the value is taken the same as for category 3, and for climatic version B4 - as for OM3;

For execution T;

For vehicle execution;

For some points in Central Sahara the temperature is taken to be +55 o C.

Change in air temperature

The changes in ambient air temperature over 8 hours are given in Table 6. Requirements for changing temperatures apply to products of all designs and categories.

Cooling water temperature

Cooling water temperatures are shown in Table 7.

Table 7 - Cooling water temperature

Product cooling method		Operating value of cooling water temperature, o C
Cooling through a flow system from water supply networks, wells, large reservoirs	U, TU, UHL (HL)	+25 / +1
	M	+25 / -2
	T, TS, TV, O	+40 / +1
	TM	+30 (1) / +10
	OM	+30 (1) / -2 (2)
	IN	+40 / -2 (2)
Cooling by circulation system using artificial ponds, cooling towers and other artificial structures	U, TU, UHL (HL)	+30 (3) / +1
	T, TS, TV, O	+40 / +1

Notes:
Limit operating value +35 o C;

Limit operating value -4 o C;

Limit operating value +33 o C;

Soil temperature

Operating soil temperature values for a depth of 1 m are given in Table 8.

Air humidity

For products used only in sealed volumes (including those opened for inspection and repair), the relative humidity value is set:

For unopened volumes or opened only in rooms with artificially controlled climatic conditions - as for category 4 of the UHL design;
For volumes opened under any conditions - as for category 3 of the same design.

Operating values of air humidity, namely, combinations of relative humidity and temperature are given in table 9.

Air humidity requirements apply to products of all designs and categories.

Table 9 - Operating air humidity values

Climatic design of the product	Product category	Relative humidity		Absolute humidity, average annual value, g∙m -3
Climatic design of the product	Product category	Average annual value	Upper value (1)	Absolute humidity, average annual value, g∙m -3
UHL	4; 4.1; 4.2	60% at +25 o C	80% at +25 o C	10
U, UHL (HL (5)), TU	1; 2	75% at +15 o C	100% at +25 o C	11
	1.1	70% at +15 o C	98% at +25 o C	10
	2.1; 3; 3.1	75% at +15 o C	98% at +25 o C	11
	5 (3)	90% at +15 o C	100% at +25 o C	13
	5.1	90% at +15 o C	98% at +25 o C	13
TS	1; 2	40% at +27 o C	100% at +25 o C	10
	1.1; 3; 3.1
	4; 4.1; 4.2	40% at +27 o C	80% at +25 o C	10
	5	90% at +15 o C	100% at +25 o C	13
	5.1	90% at 15 o C	80% at 25 o C	13
TV, T, O, V, TM (6) , OM (2)	1; 2; 5	80% at +27 o C	100% at +35 (4) o C	20
	1.1	75% at +27 o C	98% at +35 o C	17
	2.1; 5.1	80% at +27 o C	98% at +35 o C	20
TV, T, V, TM, OM (2)	3	75% at +27 o C	98% at +35 o C	17
TV, T, V, TM, OM (2)	3.1	75% at +27 o C	98% at +35 o C	17
TV, O, V, TM, OM (2)	4	75% at +27 o C	98% at +35 (4) o C	17
	4.1	60% at +20 o C	80% at +25 o C	10
	4.2	75% at +27 o C	98% at +35 o C	17
M	1; 2	80% at +22 o C	100% at +25 o C	15
	1.1	75% at +22 o C	98% at +25 o C	11
	2.1	80% at +22 o C	98% at +25 o C	15
	3; 4; 3.1	75% at +22 o C	98% at +25 o C	11
	4.1	60% at +20 o C	80% at +25 o C	10
	4.2	75% at +22 o C	98% at +25 o C	11
	5	80% at +22 o C	100% at +25 o C	15
	5.1	80% at +22 o C	98% at +25 o C	15

Notes:
The upper relative humidity values indicated in the table are also normalized at lower temperatures; with more high temperatures relative humidity is lower;

For marine vessels of the OM version, intended for a short stay in areas with a tropical climate, the values of the combination of temperature and humidity can be taken the same as for the M version;

For products intended for coal mines, the humidity values are the same as for version T;

For products of climatic versions OM4 and OM5, installed in the engine and boiler rooms of ships, the upper limit operating value is 100% at +50 o C;

For the performance of HL of all placement categories except 5; 5.1, average annual value - 85% at -6 o C;

For execution of TM placement categories 1; 2; 5; 2.1; 5.1 the annual average value of 70% at +29 o C is also applicable;

Atmosphere pressure

Air pressure requirements apply to products of all designs and categories.

For ground-based products operated at an altitude of up to 1000 m above sea level, the following atmospheric pressure values are established:

The upper working value is 106.7 kPa (800 mmHg);
Lower operating value 86.6 kPa (650 mmHg);
The lower limit value is 84.0 kPa (630 mmHg).

Wind speed

The requirement for the effect of wind speed is applied only to products for which this is specified in the technical specifications. The upper limit wind speed for all climate versions is 50 m/s.

Rain intensity

Requirements for exposure to rain apply only to products of categories 1 and 1.1, if for the latter this is specified in the technical specifications. The upper operating value of rain intensity is:

For climatic versions U, TU, UHL (HL), TS - 3 mm/min;
For climate version TV, T, O, M, TM, OM, V - 5 mm/min.

For climatic modifications U, UHL (HL), table 10 should be used to determine the combination of rain intensity and duration.

Drop intensity

Requirements for exposure to falling drops apply only to products for which this is specified in the technical specifications. The upper operating value of the drop intensity for products M, TM, OM, B category 5, which are not built-in elements indoor installation is 0.4 mm/min if their angle to the horizontal is from 90 o to 45 o.

Atmospheric composition

The content of corrosive agents in the outdoor atmosphere is given in Table 11. The content of corrosive agents in the atmosphere of premises (volumes) of categories 2÷5 is less than that indicated in Table 11 and is established on the basis of measurements carried out for specific types of premises (volumes); if measurement data is not available, then the content of corrosive agents is taken equal to 30% - 60% of that indicated in Table 11.

Table 11 - Content of corrosive agents in the outdoor atmosphere

Atmosphere type		Content of corrosive agents
Designation	Name	Content of corrosive agents
I	Conditionally clean	(no more than 0.025 mg/m3);
II	Industrial	(from 0.025 to 0.31 mg/m3); chlorides - less than 0.3 mg/(m 2 × day)
III	Marine	Sulfur dioxide no more than 20 mg/(m 2 × day) (no more than 0.025 mg/m3); chlorides - from 30 to 300 mg/(m 2 × day)
IV	Primorsko-industrial	Sulfur dioxide from 20 to 250 mg/(m 2 ×day) (from 0.025 to 0.31 mg/m3); chlorides - from 0.3 to 30 mg/(m 2 × day);

Notes: products of climatic versions M, TM, OM, as a rule, are intended for operation in a type III atmosphere; products of versions U, TU, UHL (HL), TS, T, TV and categories 4; 4.1; 4.2 - in an atmosphere of types II and/or I; execution O (except categories 4; 4.1; 4.2) - in an atmosphere of type IV; execution B - in an atmosphere of types III and IV.

Exposure to dust

Requirements for the dynamic abrasive effects of dust apply to category 1 versions TC, O and B, only to the external parts of products. In other cases, these requirements are presented when indicated in the technical specifications.

Requirements for performance or dust resistance under static or dynamic exposure to dust apply to products of category 1 versions TC, O and B, which have moving or articulated parts. In other cases, these requirements are presented when indicated in the technical specifications.

Requirements for operability or dust resistance under static and dynamic influences are not imposed on parts and assemblies intended for placement in complete products with dust-proof shells.

Requirements for the dynamic abrasive effect of snow dust are imposed on the external parts of products of UHL (HL) category 1. In other cases, these requirements are imposed when indicated in the technical specifications.

Requirements for performance or dust resistance under static or dynamic influence of snow dust apply to products of category 1 versions U, UHL (HL), O, B, if this is specified in the technical specifications or other document for the product.

The operating values of the parameters characterizing the effect of dust are given in Table 12:

Solar radiation

GOST 15150 sets the upper working value of the integral surface density solar radiation energy flux for altitudes up to and above 15 km. Actually, for altitudes up to 15 km inclusive, its value is 1125 W/m2, including the flux density of the ultraviolet part of the spectrum (280 ÷ 400 nm) - 68 W/m2. At altitudes above 15 km, the upper working value of the integral surface flux density of solar radiation energy is 1380 W/m2, including the flux density of the ultraviolet part of the spectrum (200 ÷ 400 nm) - 140 W/m2.

Requirements for exposure to solar radiation are imposed only on products of category 1. At the same time, requirements are imposed on products of category 1.1 if this is specified in the technical specifications. Requirements may not apply to the product as a whole, but only to those components and parts that, under operating conditions, are directly exposed to the sun.

Ozone concentration

The requirement for ozone exposure applies to products of categories 1 and 2, for which this is specified in the technical specifications. The upper operating value of ozone concentration in the surface (near surface) air layer is:

For climatic versions TV, UHL (HL), T, O, TM, M, OM, V - 40 μg/m 3 ;
For versions TS, U, TU - 20 μg/m 3 .

Corrosion resistance

Requirements for corrosion resistance when exposed to salt fog apply to products of versions M, TM, OM, B of categories 1 and 2, as well as to products of categories 1 and 2 of other designs intended for use on the coast. Methods for assessing corrosion resistance and permissible changes appearance products are established in the technical specifications, standard or technical conditions.

Requirements for exposure to mold fungi apply to products (their parts, assemblies) of versions T, TV, TM, OM, O, V (except for products of category 4.1).

Waterproof

Requirements for water resistance (maintaining parameters within the established values after being in water for an hour, unless otherwise specified in the technical specifications) apply to products (their parts) that can short term be under water. Products that, due to operating conditions, are subjected to dousing with sea water, must maintain their parameters within the established values.

Icing

Requirements for performance when frost falls on a product apply to versions UHL (HL), M, OM, O, B of category 1, as well as products of category 2 intended for use under a canopy. For electrical products, this means that after frost falls on it frost and its subsequent defrosting there was no breakdown or surface overlap.

Requirements for the performance of products in the event of ice formation on them apply (if this is specified in the technical specifications) to products of the U, TU, UHL (HL), M, OM, O, B categories 1 and 2 (if the product will be operated under a canopy) having exposed moving parts and/or exposed break contacts.

Other requirements

If products are intended for use in special environmental conditions (for example, an atmosphere of aggressive gases from chemical industries or inert gases, a liquid environment, radiation, saturation with atmospheric electricity), additional parameters of this environment must be taken into account.

Normal values of climatic factors during testing

For testing products, GOST 15150 establishes a narrower range of environmental climatic factors (normal climatic test conditions):

Temperature +25 ± 10 o C;
Relative air humidity 45 ÷ 80%;
Atmospheric pressure 84.0 ÷ 106.7 kPa (630 ÷ 800 mm Hg).

Note: At temperatures above 30 o C, the relative humidity should not be higher than 70%. It is allowed to set the value to 75% instead of the upper value of the range of 80%.

If other limits are adopted in the standards for individual product groups, then the values listed above are no longer valid.

If it is impossible to ensure normal climatic test conditions, it is allowed to carry out tests in climatic conditions UHL4 or O4 with recalculation to normal climatic test conditions. The recalculation method must be established in the regulatory and technical documentation for the product and/or test program.

List of sources used

GOST 15150-69 Machines, instruments and other technical products. Versions for different climatic regions. Categories, conditions of operation, storage and transportation in terms of the impact of environmental climatic factors - Introduction. 01/01/71. - Moscow: Standartinform, 2006. - 59 p.

Published: December 06, 2017 Views: 5.4k

GOST 15150-69 applies to all types of machines, instruments and other technical products and establishes macroclimatic zoning globe, execution, category, operating conditions, storage and transportation of products regarding the impact of environmental climatic factors

Types of climatic versions, designation

U - temperate climate (+40/-45 o C);
HL - cold climate (+40/-60 o C);
UHL - moderate and cold climate (+40/-60 o C);
T - tropical climate (+40/+1 o C);
M - maritime moderate-cold climate (+40/-40 o C);
O - general climatic version (except for sea) (+50/-60 o C);
OM - general climatic marine version (+45/-40 o C);
B - all climatic versions (+50/-60 o C).

Climatic conditions in Central Antarctica are not determined by GOST 15150-69. Several macroclimatic regions can be combined into a group of macroclimatic regions (for example, climate category UHL, T).

Example notation:

KSO 200-16-160 UHL 1.

This means that a bellows expansion joint with a nominal diameter of 200 mm, a working pressure of 16 bar and a compensating capacity of 160 mm is used in moderately cold climates at temperatures down to minus 60 o C in the open air.

The number after the letters indicates the placement category:

1 - open air;
2 - the same as 1 only without hitting straight lines sun rays and no precipitation;
3 - indoors without climate control;
4 - indoors with ventilation and heating;
5 - in rooms with high humidity, without artificial regulation of climatic conditions.

General provisions of GOST 15150-69

GOST 15150-69 must be used in the design and manufacture of products in accordance with the climatic modifications reflected in it. In particular, it should be used when drawing up technical specifications for the development or modernization of products, as well as when developing state standards and technical conditions establishing requirements regarding the impact of environmental climatic factors for a group of products, and in the absence of these group documents - for individual types of products. All products must be manufactured in accordance with climatic modifications in accordance with GOST 15150-69
Products must maintain their parameters within the limits established by technical specifications, standards or technical conditions during the service life and shelf life specified in the technical specifications, standards or technical conditions, after and (or) during exposure to climatic factors, the values of which are established hereby standard i.e. must comply with climatic modifications in accordance with GOST 15150-69.
Products are intended for operation, storage and transportation in the range from the upper to the lower values of these climatic modifications, while in addition to the ranges of climatic factors within which the operation of the products is ensured during operation, one or more narrower ranges of climatic factors can be established, within which provide a narrower range of parameter deviations (for example, higher control or measurement accuracy), i.e. climatic design must correspond to the category according to GOST 15150-69.
For specific types or groups of products, the types of influencing climatic factors influencing the climatic design according to GOST and their nominal values are established depending on the operating conditions of the products in the relevant technical specifications, standards and technical conditions. If there are documents that establish for groups of products a connection between the values of factors with the specified climatic modifications in accordance with GOST 15150-69, you should be guided by the instructions of these documents
It is allowed to operate products in macroclimatic areas other than those for which the products are intended, if climatic factors during operation do not exceed the limits of the nominal values established for these products. For example, products of the UHL4 climatic version can be operated in UHL2 conditions during the dry summer period.
It is allowed to operate products in conditions where the values of climatic factors go beyond the established nominal values, if deviations in service life are acceptable. In this case, the permissibility of operation, the values of climatic factors for designs, and permissible deviations in service life are agreed upon with the product supplier.
In accordance with economic and technical feasibility, it is recommended to manufacture products suitable for use in several regions established by this standard, that is, the climatic category according to GOST 15150-69 should cover several climatic regions.
Products can also be designed for use in several macroclimatic regions; in these cases combinations various conditions operation or storage with periods of stay in these conditions are established in standards or technical specifications for products, climatic versions(climate performance category) must be indicated in the accompanying documents for the product.
The macroclimatic region with a temperate climate UHL (climate category UHL) includes areas where the average annual absolute maximum air temperature is equal to or below plus 40°C, and the average annual absolute minimum air temperature is equal to or above minus 45°C.
D descends from the macroclimatic region with a temperate climate to identify a macroclimatic subregion with a warm temperate subtype of macroclimate, for which the average of the annual absolute minimum air temperatures is equal to or higher than minus 25 ° C.
The macroclimatic region with a cold climate HL (climatic category HL) includes areas in which the average annual absolute minimum air temperature is below minus 45°C. The cold climate region UHL (climate category UHL) is indicated on the map.

By agreement with the customer, it is allowed to supply products designed for a temperate climate U1 to areas within 50 km from the southwestern and southeastern boundaries of the macroclimatic region with a cold climate on the territory of the Russian Federation
Federation.

Products placed on mobile units intended for deliveries to the coastal area of the Okhotsk (north of the mouth of the Uda River) and Bering Seas (with the exception of the Kamchatka Peninsula) must be manufactured in the HL design.

Temperature values according to climatic version

Product execution		Air temperature during operation, °C
			Limit working

	1; 1.1; 2; 2.1; 3


	1; 1.1; 2; 2.1; 3


	1; 1.1; 2; 2.1; 3





	1; 1.1; 2; 2.1; 3; 3.1




	1; 1.1; 2; 2.1; 3; 3.1









	1; 1.1; 2; 2.1; 3; 5; 5.1



	1; 1.1; 2; 2.1; 3; 5; 5.1



	1; 1.1; 2; 2.1; 3; 5; 5.1



	1; 1.1; 2; 2.1; 3

Marking ( a brief description of protective coatings, types of climate control and product placement categories, degrees of protection). Products designed for various climatic regions, categories, operating and storage conditions in terms of the impact of environmental climatic factors are marked in accordance with GOST 1515069. According to the degree of protection, products provided by shells are marked in accordance with GOST 1425496. Climatic versions are marked: U1, U2, U3, T1, T2, T3, UHL1, UHL4, UT1.5.

U1- products for use in areas with a temperate climate with placement category 1 (outdoors).

U2- products for use in areas with a temperate climate with placement category 2 (under a canopy or in rooms with free access to air).

UZ- products for use in areas with a temperate climate with placement category 3 (in enclosed spaces with natural ventilation).

T1.T2.TZ- products for use in areas with both dry and humid tropical climates, placed outdoors, under a canopy, or in enclosed spaces with natural ventilation.

UHL1- products for use in areas with temperate and cold climates with placement category 1 (outdoors).

UHL4- products for use in areas with temperate and cold climates with placement category 4 (in rooms with artificially controlled climatic conditions).

UT1.5- products for use in areas with temperate climates
and in areas with a dry or humid tropical climate, both with placement category 1 (outdoors) and placement category 5 (in rooms with high humidity).

Index "C" in product labeling indicates zinc coating obtained by hot-dip galvanizing.

Letter "X" in the product labeling indicates a chemical-resistant coating.

Climatic performance		Accommodation category
U	With a temperate climate. The average of the annual absolute maximum air temperatures is equal to or below +40 °C, the average of the annual absolute minimum temperatures is higher –45 °С. Operating temperature range during operation –45...+40 °С	1	For outdoor work
HL	With a cold climate. The average of the annual absolute minimum temperatures is below –45 °С. Operating temperature range during operation –60...+40 °С	2	For work in rooms where fluctuations in air humidity are not very different from fluctuations in the open air, for example: in tents, bodies, trailers, metal rooms without thermal insulation, as well as in casings of complete devices of category 1 or under a canopy (no direct action solar radiation and atmospheric precipitation on the product)
UHL	With a temperate and cold climate. Operating temperature range during operation –60...+40 °С	3	For work in enclosed spaces with natural ventilation, without artificial regulation of climatic conditions, where fluctuations in temperature and humidity, as well as the effect of sand and dust are significantly less than outside, for example: in metal with thermal insulation, stone, concrete, wooden premises (significant reduction in the effect of solar radiation, wind, precipitation, lack of dew)
T	Tropical climate	4	For work in rooms with an artificially controlled microclimate, for example: in indoor heated and ventilated industrial and other, including underground, premises with good ventilation (no direct action of precipitation, wind, as well as sand and dust from external air)
TV	With a humid tropical climate. A combination of temperature equal to or above +20 °C and relative humidity above 80% is observed for 12 or more hours a day during continuous period of more than 2 months (chloride concentration - less than 0.3 mg/m² day, sulfur dioxide concentration - 20–250 mg/m² day). Operating temperature range during operation +1...+40 °C		For work in rooms with high humidity
TS	With a dry tropical climate. The average annual absolute maximum air temperature is above +40 °C (chloride concentration is less than 0.3 mg/m² day, sulfur dioxide concentration is 20–250 mg/m² day). Operating temperature range during operation –10...+50 °С
ABOUT	General climatic design (except marine). For macroclimatic regions on land, except for areas with a very cold climate (chloride concentration - 0.3–30 mg/m² day, sulfur dioxide concentration - 20–250 mg/m² day). Operating temperature range during operation –60...+50 °С
M	Maritime moderately cold climate
MO	General climate marine version
IN	All-climate design. For macroclimatic regions on land and at sea, except for areas with a very cold climate (chloride concentration - 0.3–300 mg/m² day, sulfur dioxide concentration - no more than 250 mg/m² day). Operating temperature range during operation –60...+50 °С

Temperate and cold climates (MCC) impose special requirements on the material of products due to low operating temperatures. Therefore, the main requirement for products intended for use in areas with UHL1 is that they must be made from materials that retain their properties at temperatures down to –70 ˚С.

It must be understood that products, for example, intended for use in areas with a temperate climate of location category 1, can also be used in areas with a temperate climate of location categories 2, 3 or 4, but not vice versa.
Similarly: products marked UT1.5 can replace products marked U1, U2, UZ, T1.T2.TZ.

Execution	Category placement	T air temperature
		Working		Limit working
		Max	Min	Average	Max	Min
U	1,2	+40	-45	+10	+45	–50
U	3	+40	–10	+10	+45	–10
HL	1,2	+40	–60	+10	+45	–60
HL	3	+40	–10	+10	+45	–10
UHL	1,2	+40	–60	+10	+45	–60
UHL	3	+40	–10	+10	+45	–10
TV	1,2	+25	+1	+27	+50	+1
TV	3	+45	+10	+20	+40	+1
T, TS	1,2,3	+45	–10	+27	+55	–10
T, TS	4	+45	+1	+27	+55	+1
ABOUT	1,2	+45	–60	+27	+55	–60
M	1	+40	–45	+10	+45	–50
TM	1	+45	+1	+27	+50	+1
OM	1	+45	–60	+27	+55	–60
IN	1	+45	–60	+27	+55	–60

Devices and various technical products are characterized by climatic design and placement category. In this article we consider in detail the climate control UHL.

You can download GOST 15150-69.

Decoding of climate control UHL:

U— temperate climatic region;
HL- cold climatic region.

Thus, we can draw the following conclusion.

UHL- temperate and cold climate
Temperature from –60 C° to +40 C°

Expert opinion

Chief Editor of LinijaOpory

Please note the similarities and differences in climate design depending on the accommodation category.

UHL1 - accommodation category 1

Operating temperature for UHL1:

minimum - minus 60 C°;
maximum - plus 40 C°.

Limit working temperature for UHL1:

minimum - minus 70 C°;
maximum - plus 45 C°.

Relative humidity for UHL1:

UHL2 - accommodation category 2

Operating temperature for UHL2:

minimum - minus 60 C°;
maximum - plus 40 C°.

Limit operating temperature for UHL2:

minimum - minus 70 C°;
maximum - plus 45 C°.

Relative humidity for UHL2:

average annual - 75% at 15 C°;
maximum - 100% at 25 C°.

UHL3 - accommodation category 3

Accommodation category 3 provides operation in indoor areas without regulation temperature conditions with natural ventilation (the temperature is practically no different from the street temperature, there are no splashes or jets of water, a small amount of dust).

Operating temperature for UHL3:

minimum - minus 60 C°;
maximum - plus 40 C°.

Limit operating temperature for UHL3:

minimum - minus 70 C°;
maximum - plus 45 C°.

Relative humidity for UHL3:

average annual - 75% at 15 C°;
maximum - 98% at 25 C°.

UHL4 - accommodation category 4

Accommodation category 4 provides operation in indoor spaces with heating and artificial ventilation (regulation of temperature conditions, no low temperatures, low dust concentration).

Operating temperature for UHL4:

minimum - plus 1 C°;
maximum - plus 35 C°.

Limit operating temperature for UHL4:

minimum - plus 1 C°;
maximum - plus 40 C°.

Relative humidity for UHL4:

average annual - 60% at 20 C°;
maximum - 80% at 25 C°.

UHL5 - accommodation category 5

Operating temperature for UHL5:

minimum - minus 10 C°;
maximum - plus 35 C°.

Limit operating temperature for UHL5:

minimum - minus 10 C°;
maximum - plus 40 C°.

Relative humidity for UHL5:

average annual - 90% at 15 C°;
maximum - 100% at 25 C°.

Post navigation

Types of climatic modification of machines, instruments and other technical products on the territory Russian Federation defined in GOST 15150-69 “Climatic design of instruments and machines”.

The climatic design is usually indicated in the last group of symbols for designating technical devices.

The letter part indicates the climate zone:

for products intended for use on land, rivers, lakes

U - temperate climate;

UHL * - temperate and cold climate;

T - tropical climate;

O - general climate design (except for areas with a very cold climate);

for products intended for use in areas with a maritime climate

M - moderately cold maritime climate;

TM - tropical maritime climate

OM - moderately cold and tropical marine climate (general climatic marine);

B - all-climate design (except for areas with a very cold climate).

* If the main purpose of the products is operation in an area with a cold climate and it is not economically feasible to use them outside this area, the use of KHL is recommended instead of the UHL designation.

The numeric part following the letter indicates the placement category:

1 - outdoors;

2 - under a canopy or indoors, where the conditions are the same as outdoors and there is relatively free access to outside air, with the exception of solar radiation and precipitation;

3 - indoors with natural ventilation without artificial regulation of climatic conditions;

4 - indoors with artificial regulation of climatic conditions (ventilation, heating);

5 - in rooms with high humidity, without artificial regulation of climatic conditions.

Products of the types of climatic modifications indicated in the first line of the table are not manufactured. 1, since these products meet the requirements for products of the types of climatic modifications given respectively in the second line of Table 1

The permissible operating temperatures for the main climatic versions are presented in table. 2

Product execution	Air temperature during operation, ? C
		Limit working

Operating air humidity values for the main climatic versions are presented in Table 3

Product execution	Relative humidity		Absolute humidity, average annual value, g*m?
Product execution	Average annual value	Upper value	Absolute humidity, average annual value, g*m?
U, UHL, HL, TU	75% at 15?C	100% at 25?C
	75% at 15?C	98% at 25?C
	90% at 15?C	100% at 25?C
	60% at 20? C	80% at 25? C
T, TV, TM, O, V, OM,	80% at 27? C	100% at 35?C
T, TV, TM, V, OM,	75% at 27?C	98% at 35?C
TV, TM, O, V, OM,	75% at 27?C	980% at 35?C

Operating values of climatic factors- naturally changing or constant values of climatic factors, within which the required nominal parameters and economically feasible lifespan of products are maintained.

Limit operating values of environmental climatic factors during operation – the values of climatic factors within which the products may (extremely rarely and for no more than 6 hours, and for the lower temperature value – 12 hours) be exposed during operation and must:

a) remain operational, but may not maintain the required accuracy and nominal parameters (in this case, the standard or technical specifications for products must indicate permissible deviations in terms of accuracy and nominal parameters, if these deviations occur);

b) after the termination of these limiting operating values, restore the required accuracy and nominal parameters.