GOST 21007-2014

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  ГОСТ 21007-2014

GOST 21007−2014 platinum Wire for thermoreversible resistance. Specifications

GOST 21007−2014

INTERSTATE STANDARD

PLATINUM WIRE FOR RESISTANCE THERMOMETERS

Specifications

Platinum wire for resistive temperature transducers. Specifications

ISS 77.150.99

Date of introduction 2015−09−01

Preface

Goals, basic principles and main procedure of works on interstate standardization have been established in GOST 1.0−92 «interstate standardization system. Basic provisions» and GOST 1.2−2009 «interstate standardization system. Interstate standards, rules and recommendations on interstate standardization. Rules of development, adoption, application, renewal and cancellation"

Data on standard

1 DEVELOPED by the Interstate technical Committee for standardization MTK 304 «Noble metals, alloys and industrial products thereof», the Ekaterinburg factory on processing of nonferrous metals

2 as AMENDED by the Federal Agency for technical regulation and Metrology

3 ACCEPTED by the Interstate Council for standardization, Metrology and certification (Protocol dated 30 may 2014 No. 67-P)

The standard was accepted by voting:

Short name of the country on MK (ISO 3166) 004−97	Country code MK (ISO 3166) 004−97	Abbreviated name of the national authority for standardization
Armenia	AM	The Ministry Of Economic Development Of The Republic Of Armenia
Belarus	BY	Gosstandart Of The Republic Of Belarus
Kazakhstan	KZ	Gosstandart Of The Republic Of Kazakhstan
Kyrgyzstan	KG	Kyrgyzstandard
Russia	EN	Rosstandart
Tajikistan	TJ	Tajikstandart

4 by Order of the Federal Agency for technical regulation and Metrology dated 26 November 2014 N 1784-St inter-state standard GOST 21007−2014 introduced as a national standard of the Russian Federation from 01 September 2015

5 REPLACE GOST 21007−75


Information about the changes to this standard is published in the annual reference index «National standards», and the text changes and amendments — in monthly information index «National standards». In case of revision (replacement) or cancellation of this standard a notification will be published in the monthly information index «National standards». Relevant information, notification and lyrics are also posted in the information system of General use — on the official website of the Federal Agency for technical regulation and Metrology on the Internet

1 Scope

This standard applies to wire made of platinum for the manufacture of sensitive elements of resistance thermometers and other industrial purposes.

2 Normative references

The present standard features references to the following standards:

GOST 4381−87 Micrometers lever. General specifications

GOST 8273−75 wrapping Paper. Specifications

GOST 9038−90 linear Measures plane-parallel limit. Specifications

GOST 10197−70 Stands and tripods for the measuring heads. Specifications

GOST 12226−80Platinum. Methods of analysis
________________
In the Russian Federation are 52519−2006 GOST R, GOST R 52520−2006, GOST R 52521−2006.


GOST 13498−2010 Platinum and alloys on its basis. Brand

GOST 14192−96 Marking of cargo

GOST 15150−69 Machines, instruments and other technical products. Versions for different climatic areas. Categories, conditions of use, storage and transportation of the impact of climatic factors of the external environment

GOST 22864−83precious metals and their alloys. General requirements for methods of analysis
________________
In the Russian Federation GOST R 52599−2006.


GOST 24104−2001laboratory Scales. General specifications
________________
In the Russian Federation GOST R 53228−2008.


GOST 28798−90 Head of the measuring spring. General specifications

GOST 29329−92Scales for static weighing. General technical requirements
________________
In the Russian Federation GOST R 53228−2008.


Note — When using this standard appropriate to test the effect of reference standards in the information system of General use — on the official website of the Federal Agency for technical regulation and Metrology on the Internet or in the annual information index «National standards» published as on January 1 of the current year, and the editions of the monthly information index «National standards» for the current year. If the reference standard is replaced (changed), when using this standard should be guided by replacing (amended) standard. If the reference standard is cancelled without replacement, then the situation in which the given link applies to the extent that does not affect this link.

3 Terms, symbols and definitions

This standard applies the following terms and symbols with their respective definitions:

3.1 : the cut resistance of the wire at 100 °C the resistance of the same cut at 0 °C. solid wire shall be determined after annealing at temperatures from 800 to 850 °C in air for 20−30 min.

3.2 wire: a Long product with a cross section of constant size, made a drawing.

3.3 skein: a length of wire, wound into a series of continuous turns.

3.4 out-of-roundness (deviation from circular shape): Difference between the largest and smallest values of the diameters measured at one cross section perpendicular to the axis of the wire.

3.5 captivity: defect of a surface, representing a delamination of the metal azkabanu forms, United with the base metal on one side.

3.6 shell: Deepening on the product surface chipping from impurities or opening of the gas bubble.

3.7 stratification: the discontinuity of metal, oriented along the direction of deformation.

3.8 crack: a Defect of a surface, representing a rupture of the metal.

4 symbols and abbreviations

In standard, the following symbols and abbreviations for condition of delivery: M — soft, T — hard.

Examples of symbols:

Platinum wire brand PL 1, solid, diameter 0.30 mm:

Wire PL1 T 0,3 GOST 21007−2014

Platinum wire brand PL2-A, soft, with a diameter of 0.05 mm:

Wire PL2 And M 0,05 GOST 21007−2014

5 Technical requirements

5.1 Main parameters and characteristics (properties)

5.1.1 platinum Wire for resistance thermometers (hereinafter wire) shall conform to the requirements of this standard and be manufactured according to the technological regulations approved in the prescribed manner.

5.1.2 the diameter of the wire and limit deviation should conform to the values specified in table 1.


Table 1

In millimeters

Wire diameter		Wire diameter
The nominal value	Limit deviation	The nominal value	Limit deviation
0,015	+ 0,002 -0,001	0,110	— 0,008
0,020	0,120
0,022	0,140
0,025	0,150
0,028	0,160
0,030	0,180
0,032	+ 0,003 — 0,002	0,200
0,036	0,220
0,040	0,250
0,045	0,280
0,050	0,300
0,056	0,320	-0,015
0,060	0,360
0,070	0,400
0,080	0,450
0,090	0,500
0,100	— 0,008	0,560
0,600	-0,015	Of 2.00	-0,02
0,630	-0,018	2,20
0,700	2,50
0,800	2,80
0,900	-0,018	Of 3.00	-0,02
Of 1.00	-0,02	3,20	-0,025
1,10	3,60
1,20	Of 4.00
1,50	4,50
1,60	5,00
1,80	6,00
Note — By agreement with consumer it is allowed manufacture of wire of other diameters and/or other extreme deviations.

5.1.3 out-of-Roundness of the wire must not exceed half of the maximum deviations in diameter.

5.1.4 Wire made of platinum, depending on the value brands are made Pl0, PL1, PL2, PL2-a And PL2-AA, Pl3, PL4, PL4-A, PL4 AA, the characteristics of which must meet the requirements of table 2.


Table 2

Mark	The value	Wire diameter, mm, not less
Pl0	Not less than 1,3925	0,03
PL1	From 1,3920 to 1,3924 incl.	0,03
PL2	From 1,3900 to 1,3919 incl.	0,015
PL2-A	From to 1.3910 to 1,3919 incl.	0,015
PL2-AA	From 1,3906 to 1,3914 incl.	0,02
Pl3	From the 1.3880 to 1,3899 incl.	0,02
PL4	From 1,3830 to 1,3860 incl.	0,015
PL4-A	From of 1.3850 to 1,3860 incl.	0,015
PL4-AA	From 1,3846 to 1,3854 incl.	0,02

5.1.5 Wire made of platinum with a purity not below grade PL 99,9 GOST 13498.

5.1.6 Wire produced:

with a diameter of less than 0.04 mm — hard (unannealed);

with a diameter of 0.04 mm and more — soft (annealed) and hard (unannealed).

5.1.7 the surface of the wire should not be captured, cracks, cavities and delaminations.

Permitted surface damage, do not strip wire at reference sweep for tolerances for diameter and ovality as well as local darkening and waviness annealed wire.

5.1.8 Wire diameter less than 0.3 mm is wound on tared plastic, oxidized or anodized aluminum coil with a diameter of 20 mm, a wire diameter of 0.3 mm is coiled into coils or wound on plastic, aluminum or anodized blue coil. Coil diameter and inner coil diameter should be at least 60 mm.

5.1.9 the Wire should be wound on a reel or folded into skeins rows, providing free spooling, with no sharp kinks.

5.1.10 Each coil (a coil) should consist of one piece of wire with no splices, knots. The ends of the wire on the coil (reel) must be firmly attached.

Each coil of wire with a diameter of less than 2 mm needs to be fixed ends of the wire of this coil. Allowed to bind the coils of wire in the Bay.

5.1.11 Mass of wire on the coil (reel) must meet the requirements specified in table 3.


Table 3

Wire diameter, mm	Weight of wire on coil (approx) net weight, g, not less
normal	reduced
From 0.015 to 0.020 incl.	0,6	0,3
SV. 0,020 «0,030 «	1,0	0,5
«0,030» 0,050 «	3,0	1,5
«0,050» 0,100 «	6,0	3,2
«0,100» 0,160 «	13,0	5,5
«0,160» 0,300 «	25,0	10,0
«0,300» 1,00 «	55,0	25,0
«1,00» 2,00 «	150,0	75,0
«Of 2.00	300,0	150,0
Notes 1 Number of coils (coils) low mass should not exceed 15% of the batch weight. 2 By agreement with consumer it is permitted deviation of the mass of wire on spool (coiled) from the values listed in this table.

5.1.12 Theoretical weight of 1 m of wire of platinum and its physical and mechanical properties are given in appendices A and B.

5.2 Labeling, packaging

5.2.1 On the sides of each coil should be marked with a number and the mass of the coil (in hundredths of a gram).

5.2.2 Each coil (a coil) of wire is accompanied by a label, which must include:

— trademark of the manufacturer;

— designation of wire;

— the mass of the wire, g;

— the batch number.

5.2.3 wire Spool, Packed into plastic or cardboard boxes, and rolls of barbed wire, wrapped in paper according to GOST 8273, must be Packed in solid wooden boxes.

The free space in the box filled with soft packing material to protect the wire from mechanical damage.

Can be applied to other types of packaging and materials, ensuring the safety of wire during the transportation and storage.

5.2.4 the Boxes are sealed, or seal the wax seals of the manufacturer. The seal (stamp) needs to have a clear impression.

Transport marking under GOST 14192 with the indication of manipulation sign «Fragile. Caution."

5.2.5 gross weight of the box should be no more than 10 kg.

6 acceptance Rules

6.1 Wire take parties. The party should consist of wire of the same brand, same diameter, same delivery condition and furnished by a single document about quality that contains:

is the trademark or name and trademark of manufacturer;

— designation of wire;

— the batch number;

value ;

— number of coils (coils) in the party, PCs;

— mass fraction of platinum, %;

— a lot of wire in the party, g;

— date of manufacture;

stamp of technical control.

The weight of the batch is not limited.

6.2 Checking of surface condition, measure the diameter and mass of the wire is subjected to each coil (a coil), verification of the gross mass of each box.

6.3 To determine the values of the select 5% of coils (coils) from the party, but not less than two.

Note — the definition of the values for wire diameter greater than 0.5 mm is carried out on samples with a diameter of 0.5 mm.

6.4 Upon receipt of unsatisfactory results, it conducted a re-test at twice the sample taken from the same batch. Results are unsatisfactory re-test the test is subjected to each coil (a coil).

6.5 To determine the chemical composition, the consumer selects one coil (a coil) of the party, manufacturer — a sample from each heat.

6.6 quality Control the labeling and packaging is subjected to each coil (a coil), box.

7 control Methods

7.1 wire Diameter is measured in two locations at a minimum distance of 100 mm from each other in two mutually perpendicular directions in each measured section. Simultaneously determines out-of-roundness as the difference between the largest and smallest diameters measured at one cross section. The measuring instrument should have an accuracy of no more than half of the limit deviation specified in table 1 for the measured diameter of the wire. The measurements are carried out measuring spring head according to GOST 28798с installation in a rack according to GOST 10197 (as for the settings on the nominal diameter use measures of length end according to GOST 9038) lever or micrometer according to GOST 4381.

Allowed the use of other measuring instruments providing the required accuracy.

7.2 Surface and the quality of winding wire diameter of 0.1 mm or less, check with a 16increase in diameter over 0.1 mm to 0.5 mm — with a 7increase in diameter more than 0.5 mm without the use of magnifying devices.

7.3 the Value determined by the method of the manufacturer, designed in the prescribed manner.

7.4 the Mass of the wire is determined on the laboratory scales of accuracy class II (high accuracy class) according to GOST 24104. The gross weight of the boxes define the scales according to GOST 29329.

7.5 Chemical composition is determined by GOST 12226, GOST 22864 or other methods, certified in the prescribed manner and providing the requirements of this standard.

7.6 Marking and packaging checks visual inspection.

8 Transportation and storage

8.1 During transportation and storage of wire shall be protected from mechanical impacts, moisture and aggressive media.

Storage conditions — 1 (L) according GOST 15150.

8.2 Transport, storage and recording of wire is carried out in accordance with the rules of storage, transportation and accounting of precious metals.

9 manufacturer’s Warranty

9.1 the Manufacturer guarantees the conformity of a wire of platinum to the requirements of this standard, under the conditions of transportation and storage prescribed by this standard.

Warranty period — 15 years from date of manufacture.

Annex a (informative). Theoretical weight of 1 m of wire of platinum

Appendix A
(reference)

Table A. 1

Wire diameter, mm	The cross-sectional area, mm	Theoretical weight of 1 m of wire, g
0,015	0,000177	0,00379
0,020	0,000314	0,00674
0,022	0,000380	0,00815
0,025	0,000491	0,01052
0,028	0,000615	0,01320
0,030	0,000707	0,01515
0,032	0,000804	0,01724
0,036	0,001017	0,02182
0,040	0,001256	0,02694
0,045	0,001590	0,03410
0,050	0,001963	0,04210
0,056	0,002462	0,05280
0,22	0,03799	0,8150
0,25	0,04906	1,0524
0,28	0,06154	1,3201
0,30	0,07065	1,5154
0,32	0,08038	1,7242
0,36	0,10174	2,1822
0,40	0,12560	2,6941
0,45	0,1590	3,410
0,50	0,1963	4,210
0,56	0,2462	5,280
0,60	0,2826	6,062
0,70	0,3847	8,251
0,80	0,5024	10,776
0,85	0,5672	12,166
0,90	0,6359	13,639
0,060	0,002826	0,06062
0,070	0,003847	0,08251
0,080	0,005024	0,10776
0,090	0,006359	0,13639
0,10	0,00785	0,1684
0,11	0,00950	0,2037
0,12	0,01130	0,2425
0,14	0,01539	0,3300
0,15	0,01766	0,3789
0,16	0,02010	0,4311
0,18	0,02543	0,5456
0,20	0,03140	0,6735
Of 1.00	AZN 0.7850	16,838
1,10	0,9499	20,374
1,20	Seen at 1.1304	24,247
1,50	1,7663	37,886
1,60	2,0096	43,106
1,80	2,5434	54,556
Of 2.00	3,1400	67,353
2,20	3,7994	81,497
2,50	4,9063	105,239
2,80	6,1544	132,012
Of 3.00	7,0650	151,544
Of 4.00	12,5600	269,412
5,00	19,6250	420,956
6,00	28,2600	606,177

Annex B (reference). Physico-mechanical properties of the wire made of platinum

Appendix B
(reference)

Table B. 1

Rupture strength , MPa (kgs/mm)		Electrical resistivity, at 20 °C, Ohm·mm/m	Temperature coefficient of electrical resistance (TCAS) ·10
soft	solid
118−196 (12−20)	At least 245 (25)	0,11	The 3.8−3,93
Notes 1 electrical resistivity and TCAS (average value) is determined on the wire in soft (annealed) state. 2 rupture strength and electrical resistivity determine the wire diameter from 0,20 to 0,50 mm.