GOST 21646-2003
GOST 21646−2003 Pipes copper and brass for heat exchangers. Technical specifications (with Amendment)
GOST 21646−2003
Group В64
INTERSTATE STANDARD
PIPES COPPER AND BRASS FOR HEAT EXCHANGERS
Specifications
Copper and brass tubes for heat-exchange apparatus. Specifications
ISS 23.040.15
GST 18 4000
Date of introduction 2004−09−01
Preface
1 DEVELOPED by the Russian Federation, Technical Committee for standardization TC 106 «Tsvetmetprokat», scientific-research and design Institute for alloys and processing of nonferrous metals (JSC «Institute tsvetmetobrabotka»)
SUBMITTED by the Technical Secretariat of the Interstate Council for standardization, Metrology and certification
2 ADOPTED by the Interstate Council for standardization, Metrology and certification (Protocol No. 23 dated 22 may 2003)
Was standards Bureau MGS N 4461
The adoption voted:
| The name of the state |
The name of the national authority for standardization |
| Azerbaijan |
Azstandart |
| The Republic Of Armenia |
Armastajad |
| The Republic Of Belarus |
Gosstandart Of The Republic Of Belarus |
| Georgia |
Gosstandart |
| Kazakhstan |
Gosstandart Of The Republic Of Kazakhstan |
| The Kyrgyz Republic |
Kyrgyzstandard |
| The Republic Of Moldova |
Moldovastandart |
| Russian Federation |
Gosstandart Of Russia |
| The Republic Of Tajikistan |
Tajikstandart |
| Turkmenistan |
The MDCSU «Turkmenstandartlary" |
| Uzbekistan |
Uzstandard |
| Ukraine |
Derzhspozhyvstandart Of Ukraine |
3 Resolution of the State Committee of the Russian Federation for standardization and Metrology, January, 28th, 2004 N 39 St interstate standard GOST 21646−2003 introduced directly as a national standard of the Russian Federation from September 1, 2004
4 REPLACE GOST 21646−76
AMENDED, published in the IUS N 7, 2004
An amendment made by the manufacturer of the database
1 Scope
This standard applies to round cold-rolled and drawn copper and brass tubes of seamless and welded blanks, used in heat exchangers.
The standard establishes the technical requirements, acceptance rules, inspection methods, packing, marking, transportation and storage of pipes.
2 Normative references
The present standard features references to the following standards:
GOST 859−2001 Copper. Brand
GOST 1012−72 aviation Gasoline. Specifications
GOST 1652.1−77 Alloys copper-zinc. Methods for determination of copper
GOST 1652.2−77 Alloys copper-zinc. Methods for determination of lead
GOST 1652.3−77 Alloys copper-zinc. Methods of iron determination
GOST 1652.4−77 Alloys copper-zinc. Methods for determination of manganese
GOST 1652.5−77 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 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 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 1770−74 laboratory Glassware measuring glass. Cylinders, beakers, flasks, test tubes. General specifications
GOST 2991−85 wooden disposable Boxes for loads up to 500 kg. General specifications
The Wire GOST 3282−74 General purpose low carbon steel. Specifications
GOST 3560−73 package steel Strip. Specifications
GOST 3773−72 Ammonium chloride. Specifications
GOST 3845−75 Pipe metal. Test method hydraulic pressure
GOST 4204−77 sulfuric Acid. Specifications
GOST 4328−77 Sodium hydroxide. Specifications
GOST 6507−90 Micrometers. Specifications
GOST 6709−72 distilled Water. Specifications
GOST 7502−98 metallic measuring tape. Specifications
GOST 8273−75 wrapping Paper. Specifications
GOST 8694−75 Pipe. The test method for distribution
GOST 8695−75 Pipe. Test method for flattening
GOST 9347−74 Cardboard gasket and gasket from him. 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 9717.1−82 Copper. Method of spectral analysis on a metal standard samples with photoelectric registration of spectrum
GOST 9717.2−82 Copper. Method of spectral analysis on a metal standard samples with photographic registration of spectrum
GOST 9717.3−82 Copper. Method of spectral analysis of oxide standard specimens
GOST 10006−80 Pipe metal. Test method tensile
GOST 10092−75 cupro-Nickel Tubes for heat exchangers. Specifications
GOST 10198−91 Boxes, wooden, for loads weighing over 200 up to 20000 kg. General specifications
GOST 10929−76 Hydrogen peroxide. Specifications
GOST 13938.1−78 Copper. Methods for determination of copper
GOST 13938.2−78 Copper. Methods of determining sulphur
GOST 13938.3−78 Copper. Methods for determination of phosphorus
GOST 13938.4−78 Copper. Methods of iron determination
GOST 13938.5−78 Copper. Methods for determination of zinc
GOST 13938.6−78 Copper. Methods for determination of Nickel
GOST 13938.7−78 Copper. Methods for determination of lead
GOST 13938.8−78 Copper. Methods for determination of tin
GOST 13938.9−78 Copper. Methods for determination of silver
GOST 13938.10−78 Copper. Methods for determination of antimony
GOST 13938.11−78 Copper. Method for the determination of arsenic
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 15527−70 Alloys copper-zinc, pressure treated. Brand
GOST 15846−2002 Products that are sent to the far North regions and equated areas. Packing, marking, transportation and storage
GOST 18300−87 ethyl rectified technical. Specifications
GOST 18321−73 Statistical quality control. Methods of random selection of piece products
GOST 21073.0−75 ferrous Metals. Determination of grain size. General requirements
GOST 21073.1−75 ferrous Metals. Determination of grain size by comparison with the scale of microstructures
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 22235−76 freight Wagons main Railways of 1520 mm. General requirements for ensuring safety during loading-unloading and shunting works
GOST 24047−80 Semi-finished products from nonferrous metals and their alloys. Sampling for tensile test
GOST 24104−2001 laboratory Scales. General technical requirements
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 25336−82 Glassware and equipment laboratory glass. The types, basic parameters and dimensions
GOST 26663−85 transport Packs. Formation with the use of packaging. General technical requirements
GOST 26877−91 metal Products. Methods of measuring form deviations of
3 Assortment
3.1 Outer diameter of the pipe and limit deviations of the diameter of the pipes shall be as specified in table 1.
Table 1 — External pipe diameter and limit deviations of the diameter of the pipes
| In millimeters | |||
| The outer diameter |
Maximum deviation of diameter tubes with precision manufacturing | ||
| St. |
incl. |
normal |
high |
| 6* |
9 |
-0,20 |
-0,16 |
| 9** |
18 |
-0,20 |
-0,18 |
| 18 |
30 |
-0,24 |
-0,20 |
| 30 |
50 |
-0,30 |
-0,25 |
| * Including 6. ** Includes 9. Note — By agreement between manufacturer and consumer of brass tubes of high accuracy from diameter 32 to 35 mm inclusive must be made with maximum deviation of diameter minus 0.20 mm. | |||
3.2 pipe wall Thickness and limit deviation for wall thickness of pipes shall be as specified in table 2.
Table 2 — wall Thickness of pipes and tolerances for wall thickness of tubes
| In millimeters | |||
| Wall thickness |
The outer diameter |
Limit deviation for wall thickness | |
| St. |
incl. | ||
| 0,5 |
- |
6 |
±0,07 |
| 0,8 |
6* |
25 |
±0,08 |
| 1,0 |
6* |
40 |
±0,10 |
| 1,5 |
12 |
40 |
±0,15 |
| 2,0 |
16** |
50 |
±0,20 |
| 2,5 |
24*** |
50 |
±0,25 |
| 3,0 |
24*** |
50 |
±0,25 |
| * Including 6. ** Includes 16. *** Includes 24. Notes 1 By agreement between manufacturer and consumer of brass tubes of high accuracy can be manufactured with extreme deviation of the wall thickness: ±0,06 mm for wall thickness 0.8 mm; ±0.09 mm «"" 1.0 mm; ±0.13 mm «"" 1.5, and 2.0 mm; ±0.17 mm «"" 2.5 and 3.0 mm. 2 By agreement with the consumer pipe can be manufactured by raznostnogo ±6%. | |||
3.3 Pipe manufactures dimensional and multiple lengths from 1.5 to 12 m.
Allowed in coordination with the consumer manufacturing of the pipe dimensional and multiple lengths from 1.5 to 12 m with an interval of 50 mm.
3.4 tolerances for the length of the measuring tubes normal manufacturing precision must meet the requirements specified in table 3.
Table 3 — Limit deviations for the length of the measuring tubes normal precision manufacturing
| Length of tubes, m |
Limit deviation, mm |
| To 2 incl. |
+6 |
| SV. 2 «8 « |
+8 |
| «8 |
+10 |
3.5 tolerances for the length of the measuring tubes manufacturing high precision must meet the requirements specified in table 4.
Table 4 — Limit deviations for the length of the measuring tubes manufacturing high precision
| Length of tubes, m |
Limit deviation, mm |
| To 8 incl. |
+4 |
| SV. 8 |
+10 |
3.6 Pipe manufacture multiple lengths with 5 mm allowance for each cut and extreme deviations in the total length of installed pipe lengths.
3.7, In agreement with the consumer it is allowed manufacture of pipes of other lengths.
3.8, In agreement with the consumer pipe can be supplied with U-shaped or U-shaped bends in accordance with the technical requirements.
3.9 By agreement with the consumer it is allowed manufacture of pipes of intermediate size on the outside diameter and wall thickness limit deviation on them for the next larger size shown in tables 1 and 2.
3.10 Theoretical weight of 1 m of pipes with nominal diameter and nominal wall thickness is for reference only and is given in Appendix A.
The legend is placed according to the scheme:
Use the following abbreviations:
| method of manufacture: |
cold-rolled or drawn — D, cold-rolled or drawn from a welded workpiece; |
| sectional shape: |
round — CU; |
| precision manufacturing: |
normal wall thickness and diameter — N, increased wall thickness and diameter — P, normal wall thickness and increased in diameter, And, increased wall thickness and normal diameter; |
| condition: |
soft — M semi — P, solid — T; |
| length: |
dimensional — CD; |
| special conditions of performance: |
increased flexibility — PP, increased strength — FRI, improved accuracy on the curvature of the PS, increased accuracy at Cochin Reza PU. |
Examples of symbols of pipes:
Tube, drawn, round, normal accuracy of production, soft, outer diameter 15 mm, wall thickness 1.0 mm, length 2050 mm brass brand L68:
Pipe DCRM 15х1,0х2050 L68 GOST 21646−2003
Pipe cold drawn, round, high precision manufacturing, soft, outer diameter 15 mm, wall thickness 1.0 mm, length 2050 mm brass brand L68 high plasticity:
Pipe DCCM 15х1,0х2050 PP L68 GOST 21646−2003
Pipe drawn from a welded billet, round, normal accuracy of production, soft, outer diameter 15 mm, wall thickness 1.0 mm, length 2050 mm brass brand L68:
Pipe SKMM 15х1,0х2050 L68 GOST 21646−2003
4 Technical requirements
4.1 Pipe manufactured in accordance with the requirements of this standard.
4.2 the Pipes are made from copper grades M1r and M2r, chemical composition of which should correspond to GOST 859, and brass brands of L70, L68, LO70−1, LA77−2, Lmsh68−0,05, Lamsh77−2-0,05, and Lomsh70−1-0.05, the chemical composition which must comply with GOST 15527.
By agreement between manufacturer and consumer alloy tubes L70 can be made with arsenic content ranging from 0.02% to 0.05%.
4.3 Pipe, depending on the brands of alloys, manufactured in soft, semi-solid and solid States in accordance with table 5.
4.4 Mechanical properties of pipes shall be as specified in table 5.
Table 5 — Mechanical properties of pipes
| Grade |
The condition of the material | Temporary resistance |
Elongation after rupture |
| not less than | |||
| M1r and M2r |
Soft |
200 (20) |
35 |
| Semi-solid |
240 (25) |
12 | |
| Solid |
290 (30) |
Three | |
| L70 |
Semi-solid |
340 (35) |
35 |
| L68 |
Soft |
290 (30) |
40 |
| Semi-solid |
340 (35) |
35 | |
| Lmsh68−0,05 |
Soft |
290 (30) |
40 |
| LO70−1 |
Soft |
320 (33) |
45 |
| Semi-solid |
360 (37) |
40 | |
| Lomsh70−1-0,05 |
Soft |
320 (33) |
45 |
| Semi-solid |
370 (38) |
40 | |
| LA77−2 |
Soft |
320 (33) |
45 |
| Semi-solid |
370 (38) |
40 | |
| Lamsh77−2-0,05 |
Soft |
320 (33) |
42 |
| Semi-solid |
370 (38) |
40 | |
Notes | |||
4.5 inner and Outer surface of pipes must be free of dirt, impeding the inspection.
On the surface of the pipe cracks are not allowed. Permitted other surface defects, if they do not take the pipe at reference sweep for tolerances for dimensions, koltsevatost, traces changes, the color of a tint, local discolorations appearing on the surface of the tubes due to condensation and drying of moisture.
4.6 to avoid internal defects in the form of shells, bundles, non-metallic inclusions and cracks.
4.7 pipe cut end Squareness, mm normal accuracy should not exceed 2 mm. slight burrs according to GOST 15467.
4.8 Cosinus cutting pipes with improved accuracy should not exceed 1.5 mm.
4.9 Raznoshennoy pipes should not display the pipe sizes for the limit deviation for wall thickness.
4.10 out-of-round brass tubes in a semi-solid state should not withdraw the pipe dimensions limit deviations for outer diameter.
For brass pipes in a semi-solid state wall thickness of less than 0.03 outer diameter ovality is determined by agreement between the manufacturer and the consumer.
Ovality is not set for copper tubes and brass tubes in the soft state.
4.11 the Curvature of tubes shall not exceed 5 mm per 1 m length.
The total curvature of tubes shall not exceed the product of the curvature of 1 m on the pipe length in meters.
The curvature of the pipes of high accuracy for the curvature shall not exceed 3 mm per 1 m length.
At customer’s request pipes can be manufactured with a curvature less than 3 mm.
The curvature of the brass pipes of an external diameter of 14 mm or less in semi-soft state and copper pipe outer diameter less than 11 mm in the semisolid and solid States is not standardized.
The curvature of the copper pipes of all sizes in the soft state is not regulated.
4.12 Pipe shall withstand flattening tests; to sludinajumi the distance between planes is equal to the wall thickness, without the formation of cracks and tears.
Hard and semi-hard copper pipes must withstand the test of flattening in the cold state after annealing in air for 1 h at 550 °C — 600 °C.
4.13 Pipes must withstand the distribution without the formation of cracks and tears by increasing the outer diameter of the pipe by 20%.
Pipes by agreement between manufacturer and consumer needs to sustain the distribution without the formation of cracks and tears when you increase the outer diameter by 25%.
Hard and semi-hard copper pipes must withstand the test of the hand in cold condition after annealing in air for 1 h at 550 °C — 600 °C.
4.14 Brass pipe shall not have a residual tensile stress.
4.15 In coordination with the consumer brass pipe soft as made with the regulated microstructure: the average grain size of the material must be from 0.01 to 0.05 mm.
4.16 the Pipe must be sealed.
5 acceptance Rules
5.1 Pipe take parties. The party should consist of pipes of the same brand of alloy, one size and one material condition shall be furnished in one document about quality that contains:
is the trademark or name and trademark of manufacturer;
— the symbol of the pipes;
— the batch number;
the weight of the party;
the results of mechanical tests of the alloy;
— chemical composition of alloy (at the request of the consumer).
The weight of the batch should not exceed 5,000 kg.
5.2 Control of the outer surface is subjected to each pipe of the party.
5.3 quality Control of pipe inner surface is subjected to five tubes from each complete and incomplete 2000 kg mass of the party.
The manufacturer for quality control of internal surface of pipes with a diameter of 25 mm and a length of over 6 m and pipe diameter of 25 mm and less are allowed to use two tubes, chosen at 5.5, and three samples with 150 mm in length, sampled during pipe cutting on the finished size length.
In coordination with the consumer the question of increasing the amount of pipe to control the internal surface quality control of internal surface of pipes is carried out on additional samples with 150 mm in length, sampled during pipe cutting on the finished size length.
5.4 To control the sizes and shapes of pipes with a diameter of over 12 mm are selected 20% of the pipes from the party. To control the size of 12 mm in diameter, select the five tubes from each complete and incomplete 2000 kg mass of the party.
The manufacturer to control the size of pipe diameter less than 12 mm are allowed to use two tubes, chosen at 5.5, and three samples with 150 mm in length, sampled during pipe cutting on the finished size length.
Allowed to control the size of pipes to use samples selected for quality control of internal surface.
5.5 tensile testing, distribution, flattening, determination of residual tensile stress, determine the average grain size and chemical composition control select two tubes from each complete and incomplete 2000 kg mass of the party.
By agreement between manufacturer and consumer, each tube of brass brands LO70−1 and Lomsh70−1-0,05 should be tested for flattening.
Allowed to the manufacturer sampling for determining the chemical composition of spending from the molten metal.
For tensile testing, distribution, flattening, determining average grain size, determine the residual tensile stresses from the pipe take one sample.
5.6 Test pipes for leaks conduct a non-destructive method of control for two tubes from each complete and incomplete 2000 kg for pipes normal precision manufacturing.
At customer’s request, check for leaks by NDT methods can be carried out on all pipes of the party with a diameter of 16−32 mm.
By agreement between the consumer and the manufacturer control and other sizes of pipes.
For pipes of welded component a tightness check is carried out on all pipes of the party.
5.7 If unsatisfactory test results of at least one of the indicators for 5.2−5.6 it is carried out re-test at twice the number of tubes taken from the same batch.
The results of repeated testing are spreading to the entire party.
5.8 For the control of pipe sizes with a diameter of over 12 mm and the quality of the outer surface is allowed by agreement between manufacturer and consumer to select pipe «blind» (by objectivity) according to GOST 18321. The number of controlled tubes is determined by the table 6.
Table 6 — the Number of controlled tubes
| The number of tubes in the party. |
The number of controlled tubes. |
Rejection number |
| 2−8 |
2 |
1 |
| 9−15 |
3 |
1 |
| 16−25 |
5 |
1 |
| Correspond 26−50 |
8 |
2 |
| 51−90 |
13 |
2 |
| 91−150 |
20 |
3 |
| 151−280 |
32 |
4 |
| 281−500 |
50 |
6 |
| 501−1200 |
80 |
8 |
| 1201−3200 |
125 |
11 |
The number of tubes in the party , the PCs, calculated by the formula
where is the mass of pipes in the batch, kg;
theoretical weight of 1 m pipe, kg;
— pipe length, m.
Party consider complying with the requirements of the standard, if the number of defective pipes is less than the acceptance number given in table 6.
The differences in the assessment of the quality of tubes the sample size shall be as specified in 5.2 and 5.4.
If unsatisfactory results control the size and quality of the outer surface of the pipe when the sample sizes specified in this standard, the manufacturer shall carry out inspection of each pipe.
6 Methods to control
6.1 inspection of the outer surface of the pipe is carried out without the use of magnifying devices.
6.2 Inspection of the inner surface of the pipe inside diameter 25 mm and length up to 6 m, inclusive, should be conducted by looking at light screen.
The inspection of internal surfaces of pipes with a diameter of 25 mm and less, and pipes over a length of 6 m is carried out on 5 samples of 150 mm in length.
Samples cut lengthwise into two parts and examine without the use of magnifying devices.
6.3 control of the diameter and wall thickness of pipes is carried out with a micrometer according to GOST 6507.
To measure the thickness of pipe wall inside diameter of 12 mm or less of each of the selected pipes cut a sample of length 150 mm and cut it lengthwise into two parts.
The diameter measurement is carried out at a minimum distance of 30 mm from the end of the pipe at three points on any section along the length of the pipe, the wall thickness measurements conducted at a distance of not less than 5 mm from the pipe end.
6.4 the length of the pipe measure tape according to GOST 7502.
6.5 permitted to conduct inspection of pipe sizes other tool, to ensure the necessary measurement accuracy.
6.6 Curvature, cosine Reza, ovality and thickness variation is determined in accordance with the requirements of GOST 26877.
6.7 Testing the mechanical properties of the pipes should be carried out in accordance with GOST 10006на longitudinal samples.
Sampling for tensile tests carried out according to GOST 24047.
6.8 leak Test is carried out by eddy currents according to the method GOST 10092 or hydraulic pressure exceeding 4.9 MPa (50 kgf/cm) for 10 s according to GOST 3845, or other non-destructive methods according to the method agreed upon by the manufacturer and consumer.
A leak test should be performed in the event of a dispute between the manufacturer and the consumer.
6.9 Test distribution is carried out according to GOST 8694 with an angle of taper of the mandrel not less than 12°.
6.10 Test flattening should be carried out according to GOST 8695.
Under the control of each tube for flattening the tubes should be to produce 20−30 mm longer than final size. At a distance of 20−30 mm from one end of the pipe should be done by a transverse incision, after which the notched end of the taper on the press.
Put the pipe with the flattened ends.
6.11 determination of the chemical composition should be carried out according to GOST 1652.1 — 1652.13 GOST, GOST 9716.1 — 9716.3 GOST, GOST 13938.1 — 13938.11 GOST, GOST 9717.1 — GOST 9717.3.
Allowed determination of the chemical composition to carry out other methods of equal precision specified.
Sampling for chemical analysis according to GOST 24231.
6.12 Removal of residual tensile stresses on the pipes is provided by the technology manufacturer.
Determination of the presence of residual tensile stresses is carried out in the event of any disagreement in quality assessment.
Determination of the presence of residual tensile stresses is carried out by ammonia method or mercury breakdown according to the methods set out in Annex V, or other methods, the accuracy (quality) of trials is not inferior to the offer.
The choice of the methodology conducted by the manufacturer.
In case of disagreement in the assessment of the quality of pipes of the arbitration control method is to determine the presence of residual tensile stresses of the mercury sample.
6.13 determination of the average grain size is carried out according to GOST and GOST 21073.0 21073.1 in accordance with 4.15 of this standard.
7 Packing, marking, transportation and storage
7.1 All pipes shall be tied in bundles weighing not more than 80 kg. Pipe wall thickness 1 mm and less, soft pipe wall thickness of 1.5 mm bind string according to the normative document, approved in a prescribed manner. The rest of the pipe can be bound with twine or wire with diameter not less than 1.2 mm according to GOST 3282 in at least three places and not less than two turns with the gasket paper in several layers according to GOST 8273или cardboard according to GOST 9347 in the field of ligation.
Each beam needs to be attached a label (tag), indicating:
— trademark or name and trademark of manufacturer;
— pipe size;
— grade alloy;
— state material;
— batch number;
the designation of the present standard.
Weight of cargo must not exceed 5000 kg.
Weight of cargo space when transporting in boxcars not to exceed 1250 kg.
Allowed when there is no congestion in the path to link pipes in bundles weighing not more than 1,500 kg of steel tape of size not less than 0,5 x 20 mm according to GOST 3560.
Consolidation packages in overpacks carried out in accordance with the requirements of GOST 24597, GOST 26663, GOST 21650.
On each package should be attached a label (tag).
Allowed to use other types of packaging, which is not inferior in strength to the above and ensure quality safety of products.
7.2 Pipe wall thickness less than 1 mm, soft pipe wall thickness up to 1.5 mm inclusive transport rail transport only-Packed in boxes churchyard 2991 and GOST 10198, in the transport of small shipments is Packed in tight wooden boxes.
The dimensions of the boxes according to the normative documents.
Packaging must provide protection of cargo from damage during transportation, subject to a tiered load of the car (car).
Each tube is supplied without packaging and are not in conjunction, must have caused the pipe (or attached) to the label, which indicate:
is the trademark or name and trademark of manufacturer;
— the size of the pipe;
— brand alloy;
— the condition of the material;
— the batch number;
— the designation of this standard.
7.3 In each box and container should be nested packing list or label showing the information listed in 7.1.
7.4 Transport marking of goods shall be conducted in accordance with trebovaniyami 14192.
7.5 Pipe transporterowych by all kinds of transport in covered vehicles in accordance with the rules applicable to the transport of the species. Placement and mounting of pipe transported by rail, must comply with the technical requirements of loading and fastening of cargoes and GOST 22235.
Allowed when sending a wagon to transport the pipe without packing in boxes in covered wagons and containers according to GOST 22225, GOST 15102 in specialized containers in ND or in covered wagons in carload shipping.
When transporting pipes of length above 3 m and packages weighing up to 1500 kg vehicle is determined in accordance with the rules of carriage applicable to transportation of this species.
7.6 Packaging tubes, sent to the far North regions and equivalent areas shall be conducted in accordance with the requirements of GOST 15846.
7.7 Pipe should be stored indoors in conditions excluding mechanical damage to pipe, to keep moisture and active chemical reagents.
Under specified storage conditions properties of pipes during storage are not changed.
Annex a (informative). Theoretical weight of 1 m of pipes with nominal diameter and nominal wall thickness
APPENDIX A
(reference)
Table A. 1
| External diameter, mm | Theoretical weight of 1 m pipe, kg, at wall thickness, mm | ||||||
| 0,5 |
0,8 |
1,0 |
1,5 |
2,0 |
2,5 |
3,0 | |
| 6 |
0,0734 |
0,110 |
0,134 |
- |
- |
- |
- |
| 8 |
- |
0,153 |
0,187 |
- |
- |
- |
- |
| 10 |
- |
0,198 |
0,243 |
- |
- |
- |
- |
| 11 |
- |
0,220 |
0,270 |
- |
- |
- |
- |
| 12 |
- |
0,242 |
0,297 |
0,425 |
- |
- |
- |
| 13 |
- |
Of 0.263 |
0,324 |
0,465 |
- |
- |
- |
| 14 |
- |
0,285 |
0,351 |
To 0.506 |
- |
- |
- |
| 15 |
- |
0,306 |
0,378 |
0,546 |
- |
- |
- |
| 16 |
- |
0,328 |
0,404 |
0,586 |
0,755 |
- |
- |
| 17 |
- |
0,349 |
0,431 |
0,627 |
0,809 |
- |
- |
| 18 |
- |
0,371 |
0,458 |
0,667 |
0,863 |
- |
- |
| 19 |
- |
0,393 |
Appears to be 0.485 |
0,708 |
0,917 |
- |
- |
| 20 |
- |
0,414 |
0,512 |
0,748 |
0,971 |
- |
- |
| 21 |
- |
0,436 |
0,539 |
0,789 |
1,025 |
- |
- |
| 22 |
- |
0,457 |
0,566 |
0,829 |
1,079 |
- |
- |
| 23 |
- |
0,479 |
0,593 |
0,870 |
1,133 |
- |
- |
| 24 |
- |
0,500 |
0,620 |
0,910 |
1,186 |
1,452 |
1,701 |
| 25 |
- |
0,522 |
0,647 |
0,950 |
1,240 |
1,519 |
1,782 |
| 26 |
- |
- |
And 0.674 |
0,991 |
1,294 |
1,586 |
1,864 |
| 28 |
- |
- |
0,728 |
1,072 |
1,402 |
One thousand seven hundred ninety seven |
2,026 |
| 29 |
- |
- |
0,755 |
1,112 |
1,456 |
- |
- |
| 30 |
- |
- |
0,782 |
1,153 |
1,510 |
1,857 |
2,187 |
| 32 |
- |
- |
0,836 |
1,234 |
1,618 |
1,993 |
2,350 |
| 33 |
- |
- |
- |
1,291 |
- |
- |
- |
| 35 |
- |
- |
0,918 |
1,357 |
1,782 |
2,195 |
2,592 |
| 36 |
- |
- |
0,946 |
1,398 |
1,837 |
2,262 |
2,673 |
| 38 |
- |
- |
1,000 |
1,478 |
1,945 |
2,397 |
2,835 |
| 40 |
- |
- |
1,053 |
1,560 |
2,052 |
2,531 |
2,999 |
| 45 |
- |
- |
- |
- |
2,322 |
2,870 |
3,403 |
| 50 |
- |
- |
- |
- |
2,592 |
3,206 |
3,807 |
Notes | |||||||
ANNEX B (reference). The values of yield strength and hardness by Vickers
APPENDIX B
(reference)
Table B. 1
| Grade |
The condition of the material |
Yield strength |
The Vickers hardness |
| L70, L68 |
Semi-solid |
130 |
80−130 |
| Soft |
100 |
- | |
| LO70−1 |
Semi-solid |
150 |
80−125 |
| LA77−2 |
Soft |
120 |
- |
| Semi-solid |
150 |
80−130 |
ANNEX b (mandatory). Control methods brass pipes for heat exchangers for the presence of residual tensile stresses by ammonia method and mercury breakdown
THE APP
(required)
B. 1 control Method brass pipes for heat exchangers for the presence of residual tensile stresses by ammonia method
Control brass pipes for heat exchangers for the presence of residual tensile stresses that cause stress corrosion cracking of alloy, carried out in the environment of ammonia for 24 hours
The method is developed in accordance with international standard ISO 6957*.
________________
* International standard in VNIIKI of Gosstandart of Russia.
B. 1.1 Definitions
In this applications section use the following terms with respective definitions:
B. 1.1.1 stress corrosion cracking: Random cracking of a material under the combined action of corrosive environment and stress (residual or applied).
B. 1.1.2 residual voltage: Voltage remaining in the metal a result of uneven plastic deformation.
B. 1.2 Equipment and materials
B. 1.2.1 laboratory Scales according to GOST 24104, or others providing a weighing error of ±0.1 g.
B. 1.2.2 pH-meter-millivoltmeter type PH-150 or other equipment that provides accuracy pH ±0,05.
B. 1.2.3 Desiccators with GOST 25336.
B. 1.2.4 Cup measuring, volumetric flasks with a capacity of 1 DMaccording to GOST 1770.
B. 1.2.5 Ammonium chloride according to GOST 3773.
B. 1.2.6 distilled Water according to GOST 6709.
B. 1.2.7 Sodium hydroxide according to GOST 4328, 30% solution.
B. 1.2.8 sulfuric Acid according to GOST 4204, 5% solution.
B. 1.2.9 Hydrogen peroxide according to GOST 10929, 30% solution.
B. 1.2.10 the aviation Gasoline according to GOST 1012 or technical rectified ethyl alcohol according to GOST 18300.
B. 1.3 Terms test
B. 1.3.1 ambient Temperature 20 °C — 30 °C. During the arbitration of the test the ambient temperature shall be (25±1) °C.
B. 1.3.2 Mechanical effects should be absent.
B. 1.4 Preparation of samples to test
B. 1.4.1 Samples represent the segments of the pipe length of (100±10) mm.
B. 1.4.2 Samples should not have sinks, scratches, dents and other defects.
B. 1.4.3 Before the test, the samples are degreased by wiping with gasoline or alcohol. Dirt or grease should be removed completely from the surface of the samples.
B. 1.4.4 removal of oxides the surface of the samples etched in 5% sulfuric acid solution for 30−60 s.
B. 1.4.5 After etching samples were washed in running water and carefully dry the outer and inner surfaces.
B. 1.5 preparing the environment for testing
B. 1.5.1 Suspension of ammonium chloride (107±0.1) g was placed in a beaker with a capacity of 1 DMand dissolve in water. The volume is adjusted to 500 cm
.
B. 1.5.2 Set the pH of the solution of ammonium chloride and 9.4 and 9.6 by adding in small portions into a solution of ammonium chloride 30−50% solution of sodium hydroxide to the desired pH value. Measurement of pH of the solution is carried out at a pH-meter.
B. 1.5.3 Titrated solution of ammonium chloride is transferred to a volumetric flask with a capacity of 1 DMand made up to mark with distilled water. Once again check the pH value of 9.4 and 9.6.
B. 1.6 testing
B. 1.6.1 For testing, use a freshly prepared solution of ammonium chloride with a pH value of 9.4 and 9.6.
B. 1.6.2 the Volume of the solution for testing needs to be 200 cmin 1 DM
total volume of the vessel.
B. 1.6.3 Dry the samples placed on a stand so that a pair of ammonia had free access to the surface of the test specimen. The desiccator is sealed.
B.
B. 1.6.5 After the test, the samples are removed from the desiccator.
B. 1.6.6 For removal of corrosion products the samples are cleaned in a pickling solution of 5% sulfuric acid with addition of 20−50 cmof hydrogen peroxide to 1 DM
etching solution (for brightening the surface of the sample).
B. 1.7 Evaluation and documentation of results
B. 1.7.1 Inspection of the sample surface is carried out visually, without the use of magnifying devices.
B. 1.7.2 Crack, found at a distance of not more than 10 mm from the cutting place, and pouchcove cracks are not taken into account. Pouchcove crack — a group of cracks radiating from the location of the local defect (shock, nicks, dents).
B. 1.7.3 Samples considered satisfactory if, at the sample surface are absent longitudinal cracks.
B. 1.8 safety
B. 1.8.1 When tested must comply with the rules work in the chemical laboratory.
B. 2 Method of control brass pipes for heat exchangers for the presence of residual tensile stresses mercury breakdown
Control brass pipes for heat exchangers for the presence of residual tensile stresses that cause stress corrosion cracking of alloy, carried out the accelerated method. The test is carried out in an aqueous solution of nitrate of mercury.
V. 2.1 Definitions
In this applications section use the following terms with respective definitions:
V. 2.1.1 stress corrosion cracking: Random cracking of a material under the combined action of corrosive environment and stress (residual or applied).
V. 2.1.2 residual voltage: Voltage remaining in the metal a result of uneven plastic deformation.
V. 2.2 Applied solutions
V. 2.2.1 For testing the used water solution containing 10 g 
solution.
V. 2.2.2 the Solution can be prepared in two different ways.
The first way: 11.4 g 
of distilled water acidified with a 10 cm
After complete dissolution of the crystals and the solution topped up with distilled water to 1 DM.
The second method is: 76 g of mercury was dissolved in 114 cmdiluted 1:1 nitric acid and add water with stirring to 1 DM
. Such dissolution in the presence of excess of acid prevents the precipitation of basic salts of mercury. The resulting solution should contain 100 grams of nitrate of mercury and an excess (30 cm
) of nitric acid in 1 DM
solution.
For the testing of 100 cmof solution, add 7 cm
of a 10% solution of nitric acid and bring the solution volume up to 1 DM
.
V. 2.3 Preparation of samples for testing
V. 2.3.1 Length samples should be 100−150 mm.
V. 2.3.2 Samples cannot be marked by stamping, marking thus, in order to avoid stress.
V. 2.4 testing
V. 2.4.1 the Samples are degreased by dipping in solvent (petrol, carbon tetrachloride etc.), followed by rubbing with a cotton cloth and immersed in a 15% (by volume) aqueous sulfuric acid solution or 40% solution of nitric acid for 30 s to remove oxide films.
After etching samples were washed in running water, then removed from the surface residual water and fully immerse in a solution of nitrate of mercury (composition is given in V. 2.2 of this Annex). The test is carried out at room temperature.
The number of solution of nitrate of mercury must be at least 1.5 cmby 1 cm
sample surface.
For testing select samples without surface defects.
V. 2.4.2 after 30 minutes the sample is removed from the solution of nitrate of mercury, and washed in running water. With the surface of the specimen remove excess of mercury.
The samples are inspected after the test no earlier than 30 min if the specifications do not specify a different exposure time to the inspection.
If there is doubt regarding the presence of cracks, the mercury from the surface of the sample should be removed by heating in a furnace with sinks of mercury or in an airtight container with a vacuum and a refrigerator for collecting the metallic mercury.
The samples are inspected with a magnifying glass in from 10 to 18-fold increase.
Absence of cracks on the samples after the test indicates the removal of residual tensile stresses.
V. 2.5 safety
V. 2.5.1, Metallic mercury and its compounds are extremely toxic. Therefore, for the test solution of nitrate of mercury equip a special room with a good ventilation system, with the trapping of mercury vapors and compliance with all sanitary regulations of the safety requirements when working with metallic mercury.
V. 2.5.2 All works are carried out in rubber gloves and lab coats (with zippers and no pockets), on his head wearing a headscarf or hat. A change of clothes should be carried out at least once a week. To carry the clothing home is not permitted.
V. 2.5.3 Storage and meal should outdoors where you could take a test. Before meals and care of premises protective clothing should be removed and left in the laboratory, and hands thoroughly washed with soap and brush.
V. 2.5.4 All work with mercury and its compounds should undergo a medical examination at least twice a year.
The electronic text of the document
prepared by JSC «Code» and checked by:
the official publication of the
M.: IPK Publishing house of standards, 2004
