GOST 494-2014
GOST 494−2014 brass Tubes. Specifications
GOST 494−2014
Group В64
INTERSTATE STANDARD
PIPE BRASS
Specifications
Brass tubes. Specifications
ISS 23.040.15
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 1.2−97 «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 Technical Committee for standardization TC 106 «Tsvetmetprokat», Scientific-research, project and design Institute for alloys and processing of nonferrous metals «joint-stock company „Institute tsvetmetobrabotka"
2 SUBMITTED by the Technical Secretariat of the Interstate Council for standardization, Metrology and certification
3 ACCEPTED by the Interstate Council for standardization, Metrology and certification (Protocol No. 67-P dated 30 may 2014)
The adoption voted:
| 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 |
Agency Farmstandart |
| 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 1781-St inter-state standard GOST 494−2014 introduced as a national standard of the Russian Federation from September 1, 2015.
5 REPLACE GOST 494−90
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 brass cold drawn and extruded round tubes for General purposes.
The standard specifies the dimensions, technical requirements, acceptance rules, methods of control and testing, packaging, labeling, transportation and storage of pipes.
2 Normative references
This standard uses the regulatory references to the following international standards:
GOST 427−75 Rulers measuring metal. Specifications
GOST 1173−2006 Foil, strip, sheet and plate copper. Specifications
GOST 1652.1−77 (ISO 1554−76) Alloys copper-zinc. Methods for determination of copper
GOST 1652.2−77 (ISO 4749−84) Alloys copper-zinc. Methods for determination of lead
GOST 1652.3−77 (ISO 1812−76) Alloys copper-zinc. Methods of iron determination
GOST 1652.4−77 Alloys copper-zinc. Methods for determination of manganese
GOST 1652.5−77 (ISO 4751−84) Alloys copper-zinc. Methods for determination of tin
GOST 1652.6−77 Alloys copper-zinc. Methods for determination of antimony
GOST 1652.7−77 Alloys copper-zinc. Methods for determination of bismuth
GOST 1652.8−77 Alloys copper-zinc. Methods for determination of arsenic
GOST 1652.9−77 (ISO 7266−84) Alloys copper-zinc. Method for the determination of sulfur
GOST 1652.10−77 Alloys copper-zinc. Methods for determination of aluminium
GOST 1652.11−77 (ISO 4742−84) Alloys copper-zinc. Methods for determination of Nickel
GOST 1652.12−77 Alloys copper-zinc. Methods for determination of silicon
GOST 1652.13−77 Alloys copper-zinc. Methods for determination of phosphorus
GOST 2991−85 wooden disposable Boxes for loads up to 500 kg. General specifications
GOST 2999−75 Metals and alloys. Method of measurement of hardness by Vickers
The Wire GOST 3282−74 General purpose low carbon steel. Specifications
GOST 3560−73 package steel Strip. Specifications
GOST 3845−75 Pipe metal. Test method hydraulic pressure
GOST 6507−90 Micrometers. Specifications
GOST 7376−89 corrugated Cardboard. General specifications
GOST 7502−98 metallic measuring tape. Specifications
GOST 8695−75 Pipe. Test method for flattening
GOST 9557−87 flat wooden Pallet size 800x1200 mm. specifications
GOST 9716.1−79 Alloy copper and zinc. Method of spectral analysis on a metal standard samples with photographic registration of spectrum
GOST 9716.2−79 Alloy copper and zinc. Method of spectral analysis on a metal standard samples with photoelectric registration of spectrum
GOST 9716.3−79 Alloy copper and zinc. Method of spectral analysis on the oxide samples with photographic registration of spectrum
GOST 10006−80 Pipe metal. Test method tensile
GOST 10198−91 wooden Boxes for goods of mass over 200 up to 20000 kg. General specifications
GOST 12082−82 wooden Crates for loads weighing up to 500 kg. General specifications
GOST 14192−96 Marking of cargo
GOST 15102−75 the universal metal closed Container of nominal gross mass 5,0 t Technical specifications
GOST 15467−79 quality Control of products. Basic concepts. Terms and definitions
GOST 15527−2004 Alloys copper-zinc (brass) pressure treated. Brand
GOST 15846−2002 Products that are sent to the far North regions and equated areas. Packing, marking, transportation and storage
GOST 18242−72 Statistical acceptance inspection by alternative feature. Plans control
GOST 18321−73 Statistical quality control. Methods of random selection of piece products
GOST 21650−76 means of fastening of package cargoes in transport packages. General requirements
GOST 22225−76 universal Containers with a gross weight 0,625 and 1,25 t. specifications
GOST 24047−80 Semi-finished products from nonferrous metals and their alloys. Sampling for tensile test
GOST 24231−80 non-ferrous metals and alloys. General requirements to selection and preparation of samples for chemical analysis
GOST 24597−81 the packaged goods. Basic parameters and dimensions
GOST 26877−91 metal Products. Methods of measuring form deviations of
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 and definitions
This standard applies the following terms with respective definitions:
3.1 the seamless round tube: a Hollow product of round in cross section, having a uniform nominal wall thickness, which at all stages of production has a continuous circumference.
3.2 round welded tube: a Hollow product of round in cross section, having a uniform nominal wall thickness, are manufactured by longitudinally welding the rolled workpiece.
3.3 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 tube axis.
3.4 nominal wall thickness: wall Thickness specified in the order.
3.5 raznoshennoy (thickness variation, the deviation from concentricity, the cross raznoshennoy): the difference between the largest and smallest values of wall thickness measured in single cross-section perpendicular to the axis of the pipe, expressed in millimeters. Raznoshennoy can also be expressed in percent relative to nominal wall thickness.
3.6 Bay: the portion of the product, continuous wound windings.
3.7 measuring length: the Product of a certain length, specified in the order, straight leg, or in the Bay.
3.8 multiple length: Cut integral multiple of the number of core length with an allowance for cutting and a tolerance on the overall length.
3.9 random length: the Product in the direct segment, having a length within the specified range.
4 Assortment
4.1 pipe Sizes are determined by the outer diameter, wall thickness and length.
4.2 nominal outside diameter and nominal wall thickness cold-drawn tube must correspond to the values indicated in table 1.
Table 1 — nominal outside diameter and nominal wall thickness cold drawn pipe
| Nominal outside diameter, mm | Nominal wall thickness, mm | ||||||||||||||
| 0,5 |
0,8 | 1,0 | 1,5 | 2,0 | 2,5 | 3,0 | 3,5 | 4,0 | 4,5 | 5,0 | 6,0 | 7,0 | 8,0 | 10,0 | |
| 3,0 |
R | ||||||||||||||
| 4,0 |
R | ||||||||||||||
| 5,0 |
R | R | R | ||||||||||||
| 6,0 |
R | R | R | R | R | ||||||||||
| 7,0 |
R | R | R | R | R | ||||||||||
| 8,0 |
R | R | R | R | R | ||||||||||
| 9,0 |
R | R | R | R | R | ||||||||||
| 10,0 |
R | R | R | R | R | ||||||||||
| 11,0 |
R | R | R | ||||||||||||
| 12,0 |
R | R | R | R | R | R | R | ||||||||
| 13,0 |
R | R | R | R | R | R | |||||||||
| 14,0 |
R | R | R | R | |||||||||||
| 15,0 |
R | R | R | R | R | R | |||||||||
| 16,0 |
R | R | R | R | R | R | R | ||||||||
| 17,0 |
R | R | R | ||||||||||||
| 18,0 |
R | R | R | R | R | ||||||||||
| 19,0 |
R | R | R | R | R | R | |||||||||
| 20,0 |
R | R | R | R | R | R | |||||||||
| 21,0 |
R | R | R | ||||||||||||
| 22,0 |
R | R | R | R | R | R | R | R | |||||||
| 23,0 |
R | R | R | R | R | R | |||||||||
| 24,0 |
R | R | R | R | R | R | |||||||||
| 25,0 |
R | R | R | R | R | R | R | ||||||||
| 26,0 |
R | R | R | R | R | R | R | ||||||||
| 27,0 |
R | R | R | R | R | ||||||||||
| 28,0 |
R | R | R | R | R | R | R | R | |||||||
| 29,0 |
R | R | |||||||||||||
| 30,0 |
R | R | R | R | R | R | R | R | R | ||||||
| 31,0 |
R | R | R | ||||||||||||
| 32,0 |
R | R | R | R | R | R | R | ||||||||
| 33,0 |
R | ||||||||||||||
| 34,0 |
R | R | |||||||||||||
| 35,0 |
R | R | R | R | R | R | R | R | R | ||||||
| 36,0 |
R | R | R | R | R | ||||||||||
| 37,0 |
R | ||||||||||||||
| 38,0 |
R | R | R | R | R | R | R | R | |||||||
| 40,0 |
R | R | R | R | R | R | |||||||||
| 42,0 |
R | R | R | R | R | ||||||||||
| 44,0 |
R | ||||||||||||||
| 45,0 |
R | R | R | R | R | R | |||||||||
| 46,0 |
R | R | |||||||||||||
| 47,0 |
R | ||||||||||||||
| 48,0 |
R | R | |||||||||||||
| 50,0 |
R | R | R | R | R | R | R | ||||||||
| 51,0 |
R | R | R | ||||||||||||
| 52,0 |
R | R | R | ||||||||||||
| 54,0 |
R | R | R | R | R | ||||||||||
| 55,0 |
R | R | R | R | |||||||||||
| 58,0 |
R | R | R | R | R | ||||||||||
| 60,0 |
R | R | R | R | R | ||||||||||
| 64,0 |
R | R | |||||||||||||
| 65,0 |
R | R | R | ||||||||||||
| 70,0 |
R | R | R | ||||||||||||
| 75,0 |
R | R | |||||||||||||
| 76,0 |
R | R | R | ||||||||||||
| 80,0 |
R | R | R | R | |||||||||||
| 84,0 |
R | R | R | ||||||||||||
| 86,0 |
R | R | |||||||||||||
| 90,0 |
R | R | R | ||||||||||||
| 93,0 |
R | ||||||||||||||
| 96,0 |
R | ||||||||||||||
| 97,0 |
R | ||||||||||||||
| 100,0 |
R | R | |||||||||||||
| Notes 1 R — used sizes of pipes. 2 Theoretical weight of 1 m of pipes are given in Appendix A. | |||||||||||||||
4.3 nominal outside diameter tolerances for the outside diameter of cold-drawn tubes shall conform to the values specified in table 2.
Table 2 — nominal outside diameters and tolerances for the outside diameter of the cold-deformed tubes
| Nominal outside diameter, mm | Limit deviations of the outside diameter with accuracy, mm | |
| high |
normal | |
| 3.0 and 10.0 |
-0,16 | -0,20 |
| 11,0−13,0 |
-0,18 | |
| 14,0−18,0 |
-0,20 | -0,24 |
| 19,0−30,0 |
-0,24 | -0,30 |
| 31,0−38,0 |
-0,30 | -0,34 |
| 40,0 42,0 44,0−48,0 |
-0,40 | |
| 50,0 |
-0,40 | |
| 51,0 52,0 54,0 55,0 |
-0,50 | |
| 58,0 60,0 64,0 65,0 70,0 |
-0,60 | |
| 75,0 76,0 |
-0,80 | |
| 80,0 84,0 86,0 90,0 93,0 96,0 97,0 100,0 |
-0,50 | |
4.4 wall Thickness cold-drawn tubes and limit deviations for wall thickness shall be as specified in table 3.
Table 3 — nominal thicknesses and tolerances for wall thickness cold drawn pipe
| Nominal wall thickness, mm |
Limit deviation for wall thickness, mm |
| 0,50 |
±0,07 |
| 0,80 |
±0,08 |
| Of 1.00 |
±0,10 |
| 1,50 |
±0,15 |
| Of 2.00 |
±0,20 |
| 2,50−3,00 |
±0,25 |
| Of 3.50−4.00 |
±0,30 |
| 4,50 |
±0,35 |
| 5,00 |
±0,40 |
| 6,00 |
±0,50 |
| 7,00 |
±0,60 |
| 8,00 |
±0,70 |
| 10,00 |
±0,90 |
4.5 nominal outside diameter and nominal wall thickness of extruded pipe shall conform to the values specified in table 4.
4.5 nominal outside diameter and nominal wall thickness of extruded pipe shall conform to the values specified in table 4.*
________________
* The text of the document matches the original, repeat, see above. — Note the manufacturer’s database.
Table 4 — nominal outside diameter and nominal wall thickness of extruded pipe
| Nominal outside diameter, mm | Nominal wall thickness, mm | ||||||||||||||
| 1,5 |
2,0 | 2,5 | 3,0 | 3,5 | 4,0 | 4,5 | 5,0 | 5,5 | 6,0 | 6,5 | 7,0 | 7,5 | 8,0 | 8,5 | |
| 21,0 |
R | ||||||||||||||
| 22,0 |
R | R | R | ||||||||||||
| 23,0 |
R | R | |||||||||||||
| 24,0 |
R | R | |||||||||||||
| 25,0 |
R | R | R | R | R | R | |||||||||
| 26,0 |
R | R | |||||||||||||
| 27,0 |
R | R | R | R | |||||||||||
| 28,0 |
R | R | R | ||||||||||||
| 29,0 |
R | R | R | R | |||||||||||
| 30,0 |
R | R | R | R | |||||||||||
| 31,0 |
R | R | R | ||||||||||||
| 32,0 |
R | R | R | R | |||||||||||
| 33,0 |
R | ||||||||||||||
| 34,0 |
R | R | R | R | |||||||||||
| 35,0 |
R | R | R | R | |||||||||||
| 36,0 |
R | R | R | ||||||||||||
| 37,0 |
R | R | R | R | |||||||||||
| 38,0 |
R | R | R | R | |||||||||||
| 39,0 |
R | R | |||||||||||||
| 40,0 |
R | R | R | R | R | ||||||||||
| 42,0 |
R | R | R | R | |||||||||||
| 43,0 |
R | ||||||||||||||
| 45,0 |
R | R | |||||||||||||
| 46,0 |
R | R | R | ||||||||||||
| 47,0 |
R | R | |||||||||||||
| 48,0 |
R | R | |||||||||||||
| 50,0 |
R | R | |||||||||||||
| 51,0 |
R | ||||||||||||||
| 52,0 |
R | R | |||||||||||||
| 53,0 |
R | ||||||||||||||
| 54,0 |
R | ||||||||||||||
| 55,0 |
R | R | R | R | |||||||||||
| 58,0 |
R | R | |||||||||||||
| 59,0 | |||||||||||||||
| 60,0 |
R | R | R | ||||||||||||
| 62,0 |
R | ||||||||||||||
| 63,0 |
R | ||||||||||||||
| 64,0 |
R | ||||||||||||||
| 65,0 |
R | R | |||||||||||||
| 68,0 |
R | R | |||||||||||||
| 70,0 |
R | R | |||||||||||||
| 72,0 |
R | R | R | ||||||||||||
| 73,0 |
R | ||||||||||||||
| 75,0 |
R | R | R | ||||||||||||
| 80,0 |
R | R | |||||||||||||
| 85,0 |
R | R | R | ||||||||||||
| 90,0 |
R | R | |||||||||||||
| 92,0 |
R | ||||||||||||||
| 95,0 |
R | ||||||||||||||
| 100,0 |
R | ||||||||||||||
| 101,0 |
R | R | |||||||||||||
| 105,0 |
R | ||||||||||||||
| 110,0 |
R | R | |||||||||||||
Continuation of table 4
| Nominal outside diameter, mm | Nominal wall thickness, mm | |||||||||||||||
| 9,0 |
10,0 | 11,5 | 12,5 | 14,0 | 15,0 | 17,5 | 20,0 | 22,5 | 25,0 | 27,5 | 30,0 | 32,5 | 35,0 | 37,5 | 42,5 | |
| 21,0 | ||||||||||||||||
| 22,0 | ||||||||||||||||
| 23,0 | ||||||||||||||||
| 24,0 | ||||||||||||||||
| 25,0 | ||||||||||||||||
| 26,0 | ||||||||||||||||
| 27,0 | ||||||||||||||||
| 28,0 | ||||||||||||||||
| 29,0 | ||||||||||||||||
| 30,0 | ||||||||||||||||
| 31,0 | ||||||||||||||||
| 32,0 | ||||||||||||||||
| 33,0 | ||||||||||||||||
| 34,0 | ||||||||||||||||
| 35,0 | ||||||||||||||||
| 36,0 |
R | |||||||||||||||
| 37,0 | ||||||||||||||||
| 38,0 |
R | |||||||||||||||
| 39,0 | ||||||||||||||||
| 40,0 |
R | |||||||||||||||
| 42,0 | ||||||||||||||||
| 43,0 | ||||||||||||||||
| 45,0 | ||||||||||||||||
| 46,0 |
R | |||||||||||||||
| 47,0 | ||||||||||||||||
| 48,0 |
R | |||||||||||||||
| 50,0 |
R | R | R | |||||||||||||
| 51,0 | ||||||||||||||||
| 52,0 | ||||||||||||||||
| 53,0 | ||||||||||||||||
| 54,0 | ||||||||||||||||
| 55,0 |
R | R | R | |||||||||||||
| 58,0 |
R | |||||||||||||||
| 59,0 | ||||||||||||||||
| 60,0 |
R | R | R | |||||||||||||
| 62,0 | ||||||||||||||||
| 63,0 | ||||||||||||||||
| 64,0 | ||||||||||||||||
| 65,0 |
R | R | R | |||||||||||||
| 68,0 |
R | R | ||||||||||||||
| 70,0 |
R | R | ||||||||||||||
| 72,0 |
R | |||||||||||||||
| 73,0 |
R | R | ||||||||||||||
| 75,0 |
R | R | R | R | ||||||||||||
| 80,0 |
R | R | R | R | R | |||||||||||
| 85,0 |
R | R | R | R | R | R | ||||||||||
| 90,0 |
R | R | R | R | R | R | R | |||||||||
| 92,0 | ||||||||||||||||
| 95,0 |
R | R | R | R | R | R | R | R | ||||||||
| 100,0 |
R | R | R | R | R | R | R | R | R | |||||||
| 101,0 |
R | |||||||||||||||
| 105,0 |
R | R | R | R | R | R | R | R | R | |||||||
| 110,0 |
R | R | R | R | R | R | R | R | R | |||||||
Continuation of table 4
| Nominal outside diameter, mm | Nominal wall thickness, mm | ||||||||||||||||
| 6,0 |
7,5 | 10,0 | 11,5 | 12,5 | 14,0 | 15,0 | 17,5 | 20,0 | 22,5 | 25,0 | 27,5 | 30,0 | 32,5 | 35,0 | 37,5 | 42,5 | |
| 112,0 |
R | ||||||||||||||||
| 115,0 |
R | R | R | R | R | R | R | R | R | R | R | ||||||
| 120,0 |
R | R | R | R | R | R | R | R | |||||||||
| 123,0 |
R | ||||||||||||||||
| 125,0 |
R | R | R | R | R | R | R | R | |||||||||
| 130,0 |
R | R | R | R | R | R | |||||||||||
| Of 135.0 |
R | R | R | R | |||||||||||||
| 140,0 |
R | R | R | R | R | R | |||||||||||
| 145,0 |
R | R | R | R | R | ||||||||||||
| 150,0 |
R | R | R | R | R | ||||||||||||
| 155,0 |
R | R | R | R | |||||||||||||
| 160,0 |
R | R | R | R | R | ||||||||||||
| 165,0 |
R | R | R | R | |||||||||||||
| 170,0 |
R | R | R | R | R | ||||||||||||
| 175,0 |
R | R | R | R | |||||||||||||
| 180,0 |
R | R | R | R | R | ||||||||||||
| 185,0 |
R | R | R | R | R | R | |||||||||||
| 190,0 |
R | R | R | ||||||||||||||
| 195,0 |
R | R | |||||||||||||||
| Notes 1 R — used sizes of pipes. 2 Theoretical weight of 1 m of pipes are given in Appendix A. | |||||||||||||||||
4.6 Outer diameter of the extruded pipe and the tolerances for diameter shall be as specified in table 5.
Table 5 — nominal outside diameters and tolerances for the diameter of the extruded pipe
| Nominal outside diameter, mm |
Limit deviation, mm | ||||||
| 21,0 | 22,0 | ±0,22 | |||||
| 23,0 | 24,0 | 25,0 | 26,0 | ±0,25 | |||
| 27,0 | 28,0 | 29,0 | ±0,30 | ||||
| 30,0 | 31,0 | 32,0 | 33,0 | ±0,35 | |||
| 34,0 | 35,0 | 36,0 | 37,0 | ±0,40 | |||
| 38,0 | 39,0 | 40,0 | 42,0 | 43,0 | 45,0 | ±0,45 | |
| 46,0 | 47,0 | 48,0 | 50,0 | ±0,50 | |||
| 51,0 | 52,0 | 53,0 | ±0,55 | ||||
| 54,0 | 55,0 | 58,0 | 59,0 | 60,0 | ±0,60 | ||
| 62,0 | 63,0 | 64,0 | 65,0 | 68,0 | 70,0 | ±0,70 | |
| 72,0 | 73,0 | 75,0 | 80,0 | ±0,80 | |||
| 85,0 | 90,0 | 92,0 | ±0,90 | ||||
| 95,0 | 100,0 | 101,0 | ±1,0 | ||||
| 105,0 | 110,0 | ±1,1 | |||||
| 112,0 | 115,0 | 120,0 | 123,0 | ±1,4 | |||
| 125,0 | 130,0 | ±1,5 | |||||
| Of 135.0 | 140,0 | ±1,6 | |||||
| 145,0 | 150,0 | ±1,7 | |||||
| 155,0 | ±1,8 | ||||||
| 160,0 | 165,0 | ±1,9 | |||||
| 170,0 | 175,0 | ±2,0 | |||||
| 180,0 | ±2,1 | ||||||
| 185,0 | 190,0 | ±2,2 | |||||
| 195,0 | ±2,3 | ||||||
4.7 the wall Thickness of extruded pipe and limit deviations for wall thickness shall conform to the values specified in table 6.
Table 6 — wall Thickness and limit deviation for wall thickness of extruded pipe
| Nominal wall thickness, mm |
Limit deviation for wall thickness, mm |
| 1,50 |
±0,25 |
| Of 2.00 |
±0,30 |
| 2,50 |
±0,40 |
| Of 3.00 |
±0,45 |
| Of 3.50−4.00 |
±0,50 |
| 4,50−5,50 |
±0,55 |
| 6,00 |
±0,60 |
| 6,50 |
±0,65 |
| 7,00 |
±0,70 |
| 7,50 |
±0,75 |
| 11,50 |
±1,10 |
| 12,50 |
±1,20 |
| 14,00 |
±1,40 |
| 15,00 |
±1,50 |
| 17,50 |
±1,75 |
| 20,00 |
±2,00 |
| 22,50 |
±2,25 |
| 25,00 |
±2,50 |
| 27,50 |
±2,75 |
| 30,00 |
±3,00 |
| 8,00 |
±0,80 |
| 8,50 |
±0,85 |
| 9,00 |
±0,90 |
| 10,00 |
±1,00 |
| 32,50 |
±3,25 |
| 35,00 |
±3,50 |
| 37,50 |
±3,75 |
| 42,50 |
±4,25 |
4.8 the length of the pipe manufactured in lengths and coils.
In stretches of pipe made:
— random lengths from 1 to 6 m — cold-drawn and extruded;
— dimensional length or multiple of fixed lengths within the random lengths — cold.
Note — it is possible to supply extruded and cold-deformed pipes with a length less than 1 m, but not less than 0.5 m, not more than 10% of the mass of the party.
In coils weighing not more than 150 kg pipe manufacture:
— length less than 10 m with an outer diameter up to 10 mm inclusive, and wall thickness up to 1,5 mm incl. — pulled.
4.9 tolerances for the length of the pipe lengths shall be as specified in table 7.
Table 7 — Limit deviations in length of pipes lengths
| Nominal outside diameter, mm | Limit deviation of length, mm | ||||||
| less than 2000 |
2000 and more | ||||||
| From | 3 |
to | 12 | incl. | +10 | +10 | |
| SV. | 12 |
“ | 50 | » | +6 | +10 | |
| " | 50 |
" | 100 | " | +10 | +15 | |
4.10 Pipe in multiple lengths manufactured with an allowance for each cut to 5 mm and the limit deviation for the total length of installed pipe lengths.
The legend of pipes are placed according to the scheme:
| Pipe |
X | CU | X | X | … | XX | … | … | GOST 494- |
| A method of manufacturing | |||||||||
| Sectional shape | |||||||||
| Precision manufacturing | |||||||||
| Condition | |||||||||
| Dimensions | |||||||||
| Length | |||||||||
| The grade of metal | |||||||||
| Special conditions | |||||||||
| The designation of this standard |
Use the following abbreviations
| method of manufacture: | cold-deformed (drawn or rolled) — D; |
| extruded — G; | |
| sectional shape: |
round — CU; |
| precision manufacturing: |
Normal — N; |
| increased — P; | |
| high; -; | |
| condition: | soft — M; |
| soft high plasticity — L; | |
| chetvertogo — H; semi-solid — P; | |
| semi-improved ductility, And; | |
| length: | random — ND; |
| dimensional — CD; | |
| in the bays — BT; | |
| special conditions: | pipe high precision curvature — T, |
| pipe high precision curvature — K | |
| Pipe antimagnetic And |
The sign «X» is placed instead of the data that has more than one value except to indicate the length and special conditions.
Examples of symbols of pipes:
tube, drawn, round, normal accuracy of production, is soft, with an outer diameter of 28 mm and a wall thickness of 3 mm, random length brass brands L63:
pipe DCRM 28x3 ND L63 GOST 494-…
the pipe is extruded, round, outer diameter 60 mm and internal diameter 40 mm, length 3000 mm brass brand L60:
pipe HCRHH 60х40х3000Л60 GOST 494…
5 Technical requirements
5.1 Basic implementation
5.1.1 Pipe manufactured in accordance with the requirements of this standard for technological regulations approved in the prescribed manner.
5.1.2 Drawn and cold-rolled pipes made from brass brands L63 and L68, extruded — brass brands L60 and L63, LS59−1,
Lzhmc59−1-1 with the chemical composition according to GOST 15527.
5.1.3 Pipe produce cold-drawn and extruded.
Cold drawn tubes manufactured in a soft, chetvertogo and semi-solid States (with the removal of internal tensile stresses).
5.1.4 External and internal surface of pipes must be free from dirt and oxidation that impede a visual inspection, no cracks, delamination, captured, bubbles and shells.
Allowed some small surface defects: slivers, dents, nicks, grooves, scratches, scores, if they do not withdraw pipe for maximum deviations in size when the control sweep of the place of the defect before the uninstallation.
On the surface of the pipes allowed koltsevatost, color tint, redness and traces of edits.
On the inner and outer surfaces of the drawn and cold rolled pipe welded blanks allowed traces the joint and separate longitudinal risks on the seam, if the seam passes the test on flattening.
5.1.5 Pipe should be trimmed evenly and should not have a significant Burr on GOST 15467.
Cocina cutting of pipes shall not exceed the values given in table 8.
Table 8 — Slant cut pipes
| Nominal outside diameter, mm | Cut end Squareness, mm, not more, mm |
| Up to 20 incl. |
2 |
| SV. 20 to 50 incl. |
3 |
| «50» 100 « |
4 |
| «100» 170 « |
5 |
| «170 |
7 |
5.1.6 Raznoshennoy should take the pipe sizes for the limit deviation for wall thickness.
Ovality for cold-deformed tubes in a semi-solid state with wall thickness not less than 1/30 of the outer diameter at the sections and extruded tubes with a wall thickness of not less than 1/15 of the outer diameter should not withdraw the pipe dimensions limit deviations for outer diameter.
Ovality is not set for:
— pipes made in the coils;
— cold-deformed tubes in the soft state;
— cold-deformed tubes in chetvertogo and semi-solid States with a wall thickness of less than 1/30 of the outer diameter;
— rolled tubes with a wall thickness of less than 1/15 of the outer diameter.
5.1.7 Cold, chetvertichnye and semi-hard tubes with an outer diameter of 12 mm in segments, and extruded pipe needs to be straightened. Curvature of 1 m of pipe length must not exceed the values given in table 9.
Table 9 — the curvature of the pipe
| Pipe the method of manufacture | Nominal outside diameter, mm |
Curvature of 1 m in length, mm in precision manufacturing |
| Cold (chetvertichnye and semi-solid) |
From and 13 more | 5 |
| Extruded | Up to 150 |
5 |
| SV.150 |
1 |
The total curvature should not exceed the curvature for 1 m pipe length total pipe length in meters.
The curvature is not set:
— for pipes made in the coils;
for cold-deformed tubes in chetvertogo and semi-solid state with an outer diameter less than 13 mm;
for cold-deformed tubes in soft condition.
