This part specifies the requirements, test methods, inspection rules, marking, packaging, transportation, storage and contract contents of aluminum and aluminum alloy hot extruded tubes produced by bridge-type combined dies in the split-flow combination mode. This part is applicable to aluminum and aluminum alloy seamed round tubes, rectangular tubes and regular polygonal tubes used in industries such as highways, bridges and construction. GB/T 4437.2-2003 Aluminum and aluminum alloy hot extruded tubes Part 2: Seamed tubes GB/T4437.2-2003 Standard download decompression password: www.bzxz.net

GB/T44374 and its related hot bending and pressing group 3 are divided into two parts: Part 1: No pipe: Part 2: GB/T4457.2-2003 This part is formulated in accordance with relevant foreign standards such as EN755-2:198, EN7.if-8:1998, ASTME221M2000.A.S1MB429-2000. The allowable deviation of the dimensions in this part is only one level of precision, and the total accuracy is the same as that of N758: The maximum error is the same as that of EN755-8. The mechanical properties of the four-digit pipe grades in this part adopt the ASTMR221 standard. The China Nonferrous Metals Industry Association has issued this part. This part is under the jurisdiction of the National Nonferrous Metals Standardization Technical Committee, and is under the responsibility of Northeast Light Alloy Co., Ltd. and Jiangsu Qiyuan Buckle Industry Co., Ltd. This part is participated in by Wujian Nanping Aluminum Co., Ltd., Southwest Aluminum (Laituan) Co., Ltd., and Lanzhou Aluminum Co., Ltd. Northwest Nuo Processing Branch.
The main drafters of this part are: Wang Guo, Kou Xinzhu, Liu Kang, Shang Tingru, Che Ruishan, Qiang Lingfeng, Dawei Ju, Tu You, Zhang Weibin, Mantie. 1 Scope
Aluminum and aluminum alloy hot extruded tubes
Part 2: Seamed tubes
E/T4437.2—2003
This part specifies the requirements, test methods, inspection rules, marking, packaging, transportation, storage rules, etc. for aluminum and aluminum alloy hot extruded tubes produced by split-flow combination molds or integrated molds. This part is applicable to aluminum and aluminum alloy hot extruded tubes, T-shaped tubes and T-shaped tubes used in the bridge and building industries. 2 Normative references
The following documents are cited in this part as the terms of this part. For all referenced documents, all amendments (excluding errata) or revisions accompanying them are not applicable to this section. However, the latest versions of these documents shall apply to the relevant parts or references. For all undated referenced documents, the latest versions shall apply to this section. GB/7228 Metal Materials Temperature Test Method GB/13190 Chemical Composition of Deformed Aluminum and Aluminum Alloys GB/T3190 Chemical Composition of Deformed Aluminum and Aluminum Alloys GB/T3246.1 Inspection Method for Microstructure of Deformed Aluminum and Aluminum Alloy Products GB/T3246.2 Inspection Method for Low-power Deformed Aluminum and Aluminum Alloy Products GB/T3246.3 Chemical Analysis Method for Aluminum and Lead Alloys GB/T3246.4 Inspection Method for Low-power Deformed Aluminum and Aluminum Alloy Products GB/T3246.5 (New) Chemical Analysis Method for Aluminum and Lead Alloys GB/T3246.6 (New) 16863
GR/T17452
3 Requirements
3.1 Product classification
3.1.t Brand status
Deformation book, magnesium & its combined products tensile test specimens deformed aluminum and aluminum alloy chemical composition analysis table group right method for wealth of the warehouse number, state blood in accordance with the provisions of Table 1, Table 1
mynA,nkn,1050A.1055.:100.J2002411,2017.2A12.2C24
5A03.5A55
O, HJ13, F
O.HLIET4.F
H11x、F
If other combinations or states are required, they can be agreed upon by both parties. 3.1.2 Marking Examples
Example 1,
5^n5,3083,5154.5086
EA6005
O,HI12,F
O,HI.2.24,1F,F
14,16,F
T4、T5、TE,F
Made of a%3 alloy, J6 state, outer diameter 40.cc nm. wall pressure 6. UW mm, fixed length 4 000 trm, hot extrusion chain network business markings are:
GB/T 4437.2—2D03
-6553-T640X6×1000G3/T4437.22503 Example 2:
Using 2A12 alloy, T4 state, rectangular load length 20.c5mm, width 15.6cmlml. Non-fixed-length hot extrusion pipe with a wall thickness of 2.33mm is marked as:
Rectangular pipe 2A12-7420×1:×2/T44A7.2—2003 Example 3:
Made of 11w, H112 state, outer diameter of the outer circle is 110.00mm, wall thickness.00m m. The hot extruded hexagonal seam pipe with a fixed length of 3000mm is marked as:
1101-112$141×X3000G/4137.2—2002.
.3.2 Chemical composition
The chemical composition of the material shall comply with the provisions of H/T319). 3.3 Dimensional tolerance
3,3,1 Dimensional tolerance
3.3.1.1 Dimensional tolerance of the medical pipe: 3.3.1.1. In the drawing, the outer diameter, inner diameter and thickness are usually limited. If the outer diameter and inner diameter are also specified, the inner diameter, wall thickness, and wall thickness shall be indicated in the contract or drawing, but all three cannot be selected. 3.3.1.1.2 The allowable difference of the diameter of the pipe (outer diameter or inner diameter) shall comply with the provisions of Table 2. Set 2
point diameter: outer sample or inner selection)
3 6. 09 ~ 18. 00
1, oc -- K, c3
30.0C-.36.c5
5U. JC--3c. G8
6, C9.--120, 00
- 120. 00--2C0. 3C
2-2Gn, nG~.45, a6:
the normality of the diameter system with the straightness and the nominal
diameter
23, 8
Point diameter may be like
Any point diameter and nominal main diameter are known in some FH?12 state
TA,T,Tu,TA.
T66,TX6 years old each
stove 1, the average self diameter is the average of the two perpendicular angles measured on the horizontal line. The unit is the unit of measurement
12, 20
1 2, 50
Note 2, for pipes with a diameter of not more than 180 nm, the total size in the table is: the outer diameter of the pipe is within the specified range, the thickness of the sample is not less than 1.5% of the village, the thickness of the smallest outer diameter is 2.0% of the village, the difference between the value in the table and the value in the table is determined by the following method: 2.02. When the value difference in the table is 1.
, the screen is greater than the inner diameter by 1.~2.C, the deviation in the table is 2.0. When the value in the table is larger than 1.1: When the thickness is larger than 1.5~1.c% in the table: When the thickness is larger than 1.5~1.c% in the table: ×4,0,2
GB/T 4437.2—2003
3.3.1.1.3 The allowable deviation of the thickness of the round tube shall comply with the provisions of Table 3 for ordinary grades: if high-precision or ultra-high-precision grades are required, it shall be indicated in the contract. If not indicated, the provisions of the general grade shall apply.
First Edition
High-grade
Ultra-high-precision
3.3.1.2 The cross-sectional dimensions and allowable deviations of square, rectangular and regular polygonal tubes: The allowable deviation of the thickness at any point|| tt||Each type of early +15 pieces
service +%
unit is distance
3.3.1.2.1 Square, starting shape, polygon side length or face discontinuity (while the interval refers to the square, short shape, end up to the middle parallel to the near sub-and the allowable deviation between the sub-and shall comply with the provisions of Table 4 Table 4
When the circumscribed circle diameter is the following, the allowable deviation of the inner length or the two sides is the interval or the face
-lu. cu. co
*>25. 00 -- 5C. C0
25G. c--10.c9
-10u. u0-~ Jb11, no
2 150, 00 ~2uu. UU
>23.--350, 63
1x.c-250.c5
>1G2. 26--2UD. 51
10, JG
.. 3. 56
2-2X.. c3-2c, c?
=1, 7G
Note 1, this table is not suitable for / () and 1≤51 status. This status is the sales size of the museum and the East needs to negotiate the interest standard
>500. (5--35c.co
Note 2: 1 Union General 1XXX.4XXX quantity brand profit 6005.6005A.6053ED3A brand information, 2 columns for T2XXX.5XXX7x series and 6105F, 6005A, 5C.53.6-63.A other than 9XXX brand specifications, Note 3: This allowable difference does not apply to the thickness less than 7.5% of the national system, the series is less than the side length of the surface of the material of 2,55 of the forbidden difference is given:
thickness outside 2. ~ 2. When: the value of 1.51 in the table is 2. When
is more than the relationship between the table and the deviation is complete × 3; Thickness is 0.5% 1.% * median 4.0
3.3.1.2.2 Stop square shadow, add, the wall of the positive tube should be allowed to meet the specifications in Table 5: 3.3.2 Length
3.3.2.1 The length of the actual size material should meet the general requirements of the table, and the high-precision version should be in Hechuan Xiaofa Yong, according to the business level specification when the person indicates, before delivery, each notice will be left for 5 days m saw 13
CB/T4437.2—2003
>, 5c --1. 5c
>1. 50 - 3, 0C
3. c-5, x
2-3. 0u--10. 00
2- 10. 00 ---5. 00
15. 26-20. 00
2D. DU~-30. 00
.>,0. 011~--u. 00
1a, 4c
.- 3. 6c.
-1, 2k
Foreign principal is the following nominal value, the wall thickness ... 75
±3,00
Jiangsu: Suitable for 1xxxxK series and o0s6ucA, ucusA brand 4 timber unit is from
≥ 3F5. 1-~3: 2. X
_a, ao
2 inspection applicable to 2XX, XXX series and other GXX brands other than XIEA.6U6, U3A. External diameter of the government four diameters
:8.00--100.0c
1.c--2x.c?
>20m.00--350.00
Pudi set
High precision rubber
Length often
-2 non~s (a
Height
(G 3s
Permitted by the general design
3.3.2.2 The length range of non-fixed length pipes is 1c35mm~5mm3.3.3 Cutting slope
The cutting slope of the steel pipe cannot exceed half of the normal fixed length. 3.3.4 Curvature
Commercial rate
Unit height meter
13 3~15 000
Butler
Grade
The bending degree of the bending formula of Figure 1 should comply with the requirements of the table. The bending degree of square, polygonal and polygonal pipes should not exceed 1.5mm/mh and should not exceed c.smm/302mm..Taiwan
Outer diameter: 3:
8. 1~. S, 00
2#5, 5~-153. 00
:-1.50 nn~ 25n. 00
250.00350.00
Li Thick/u
A,(mm/o)
But the bending degree of materials less than 1.5% of the outer diameter shall not be used in the table. The supply and demand shall be determined. 3.3.5 Plane spacing
fA/4437.2—2003
kA tnn/8cp mm.?
The surface section of regular, rectangular and regular polygonal materials shall comply with the assumptions of the pipe grade in the table. If a higher level is required, it shall be proved in the contract or drawings. The measurement method of plane spacing shall be as follows according to the ordinary grade regulations. 2. 30.0G--SC.Go
>55, 63-100, 05
>100, 00 150.00
2150.00~200.0U
2-200, 00 - 350, 00
3.3.6 Torsion resistance
Hazardous grade
The center surface of the single material under the pressure
High-precision
Plane space
Unit is meter
Not more than
High-precision
1. The torsion resistance of the pipes shall comply with the provisions of Table 3 for temporary grades. If high precision is required, it shall be indicated in the contract or on the paper. If no indication is given, it shall be determined according to the grade period. The force used to determine the torsion resistance shall be as shown in Figure 7GB/T4437.2—2003
!t. 6u-su. o0
3n, nn 5o,on
2> 50, 03. - 13x, t3
-100, 0c263, 0
-2nn, t0-3, tr
per meter length above
normal effect
high performance
Su standard surface
under the special length of the second length, the twist expansion certificate
is not greater than
twist characteristic
card flow above
growth into 6c
replacement logic no
allowed: for pipes less than 1 center, the allowable quotation is subject to negotiation, 3. 3. 7 Angle
High-grade
Unit
Length
Re-grade
Contractor's short
Square, rectangular, regular polygonal pipe twisting degree should be in accordance with the provisions of Table 10 ordinary grade, high-precision paper should be indicated in the contract or drawing, if not indicated, it shall be determined according to the ordinary grade. Table 10
Helping the zero-grade
Pipe
High-precision rice
: When the requirements (a) are completed, they must be indicated in the contract. 3.3. Angle radius
Allowed
3.3.8.1 The square, rectangular, regular polygonal pipe with no angle single grid, at its tip negative with a slight inverted medical. Calcium Ying drawing smooth, but should be special space 1! 3.3.2 Note: For square, rectangular and polygonal pipes with rounded corners, the allowable energy difference of their rounded corner diameters shall be as specified in Table 12. E
3.4 ​​Mechanical properties
Specified radius
Table 11
The mechanical properties of the replacement material shall comply with the requirements of Table 13, Table 13
107CA.OnG
Ic5CA,1033
110c,1200
Supply status
Sample status
Thickness dtl
Gu/T 4437.2—2003
Single section is millimeters
Circular half weight is not more than
High top line
Unit is millimeters
Guozhou and control allow inquiry room
% of the specified half correction
! Resistance to control R,
75~-1DI>
170--240
Specified non-proportional
elongation strength R.
(N/m:ut)
After the break:
GB/T4437.22003
Supply state
E[L12,16
Civil Affairs Association
Table 3 [Continued
Thickness: mm
:>3. 21-- 26. 00
12,5G...2,cil
According to the standard of the country in the table, the energy index is effective or the performance is equivalent to the actual measured value. The specified test strength is less than the breaking rate! 5 m.
3.5 Appearance quality
3.5.1 The surface of the pipe is hot extruded surface, which should be smooth and free of cracks, corrosion and foreign debris. + B/T4437.2—2003
3.5.2 The surface of the pipe is allowed to have slight skin, rust, abrasion, scratch, group, pressure pit, etc., and its depth shall not exceed the allowable deviation range of the outer diameter (inner diameter) of the general material to ensure the allowable size of the pipe. 3.5.3 The surface of the pipe is allowed to have the marks of extrusion caused by the machine, and the black pits with rough oxidation color. The round pipe shall have a number of vertical marks that do not affect the external dimensions. The depth shall not exceed 0.5m. 3.6 Low-magnification weave
3.6.1 The low-magnification weave of the pipe machine is not allowed to have pores, inclusions, etc. 3.5.2 The depth of the upper layer of the low-magnification test piece of the property right shall not exceed half of the diameter tolerance margin. 3.6.3 The low-power fabric of the tube grid is not allowed to be well matched. 3.7 The apparent covering organization
The apparent withdrawal organization of the fire state tube is not allowed to exceed the specification: 4 Test methods
4.1 Chemical composition blanking analysis method
The chemical composition of the tube should be analyzed according to the provisions of CH/16987: 4.2 Dimension inspection method of pipes
The size of the material can be measured by corresponding precision calipers, sub-rulers, rulers, universal angle rulers, steel rulers, etc.! Tools for measuring ears. L.3 Mechanical properties inspection method
Mechanical properties inspection of pipes shall be carried out in accordance with the provisions of GB/T223. 4.4 Appearance quality inspection method
Surface quality of pipes shall be inspected by measuring the surface quality of pipes. The defects that cannot be confirmed can be completely measured. 4.5 Microstructure and macrostructure inspection method Microstructure and macrostructure inspection of pipes shall be carried out in accordance with the provisions of GB/T824C. 5 Inspection rules
5.1 Inspection and acceptance
5.1.1 The pipe supplier's technical supervision department shall conduct inspection and ensure that the product quality meets the requirements of this standard. Fill in the quality certificate. 5.1.? The received products shall be inspected according to the provisions of this standard. If there is any discrepancy with the provisions of this standard and the order contract, the supplier shall submit a written report to the supplier. The supplier and the buyer shall negotiate to resolve the problem. If there is any discrepancy in appearance, quality and size, the supplier shall submit the report within one month after receiving the product. If there is any discrepancy in performance, the supplier shall submit the report within three months after receiving the product. If the product needs to be inspected, the supplier and the buyer shall jointly conduct the sampling.
5.2 Batch
The materials shall be of the same alloy, shape and size. 5.3 Inspection Items
Each batch of products shall be inspected for chemical composition, appearance quality, mechanical properties, dimensional deviation and microstructure. The product shall also be inspected for microstructure.
5.4 Sampling
The product sampling shall comply with the provisions of Table 17.
GB/T 4437.2—2003
Chemical composition
Size and width
Mechanical quality
Bin Xin Institute
Sample regulations
Conform to CHT174
Technical recommendation or thermal properties furnace>The number of roots shall not be 2, not less than 2, and each design shall be connected with the temporary test case. The technology must conform to the requirements of IEC61004-2-1994/C65. When the root effect is 5, at least 2,
of the previous life shall be taken as the test companion:
the whole batch of roots shall be connected in batches of 2, at least 2 phases, and ten roots shall be tested at the bridge pressure end for the first time.
When the heat treatment is in the wet area, the static hot head shall be taken: 5.5 Determination of risk results
5.E, 1. When the chemical composition is not up to standard, the product is judged to be unqualified. 5.5.2 When the product size deviation and appearance are unqualified, it is judged to be unqualified. Required Article No. Inspection Method 3.2
5.5.3 When there is a sample that does not meet the requirements in the mechanical properties test results, the batch of products (including the required products represented by the unqualified sample in the original unqualified batch of products) should be re-tested. If all the re-test results are qualified, the whole batch is qualified. If one sample does not meet the requirements in the re-test, the whole batch of products or the product is unqualified, or it can be inspected piece by piece and delivered after passing. Or it can be reheated and re-sampled.
5.5.4 Determination of the results of low-power group inspection: 5.5.4.1 If there are cracks or non-metallic impurities in the low-power group inspection, the batch shall be scrapped, and the supplier shall be allowed to avoid inspection. The qualified ones shall be delivered. 5.5.4.2 If there is non-compliance due to lamination, the non-compliant product shall be printed with a certain length and then repeated inspection until it is qualified. Other products that have been tested and qualified shall be delivered after cutting. 5.5.4.3 When the whole sample is unqualified, it is allowed to cut from the front end of the product: the specified length is required, and the product shall be delivered after the maximum head length is determined. 5.5.5 When the microstructure is unqualified, the product (heat treatment furnace) is judged to be unqualified. 5.5.6 When other defects occur, the supply and demand parties of this batch of products shall negotiate and deal with it. 6. Marking, packaging, transportation, storage
6.1 Marking
6.1.1 The packaging box marking of the material shall comply with the requirements of GB/T3199. 6.1.2 Each tube should have the following markings (the foot end of the extruded tube of the material that needs to be delivered should also be marked with a \W\ mark): >> Stamped by the technical supervision department: b) Metal (or alloy) brand; d) Batch number (or smelting furnace number).
6.1. If the pipes are not marked by any method, each batch (box) of pipes shall be marked with at least two small labels or tags, and the above marks shall be used.
E.2 Packaging, transportation and storage
6.2.1 The packaging, transportation and storage of pipes shall comply with the provisions of B/T3195 (GB/T4437.2-2003).
6.2.2 For pipes with a diameter (or external diameter) not exceeding 5mm and a diameter (or external diameter) not exceeding 50mm and a diameter not exceeding 7mm, they shall not be packed and shipped after being sorted. Other packaging methods may be used with the cooperation of both parties. 6.3 Quality Certificate
Each batch of pipes shall be accompanied by a product quality certificate, indicating the supplier's name, address, telephone number and fax number
Production name
Specifications:
Batch card (or furnace number),
g! Pollution and quality of parts;
h) Results of various analyses and tests, and the stamp of the technical supervision department; This standard number:
Factory date or packaging date),
Contact content
The contract for purchasing the materials listed in this standard includes the following: Product name:
b) Brand:
) Status:
(1) Size and specifications;
e! ;
The requirements of this standard shall be marked in the agreement, g) the number of this standard,
5) The result of negotiation when adding contents other than those in this standard:2 batches of materials shall be put into batches for inspection. The same alloy, shape and size shall be included in the batches. 5.3 Inspection items Each batch of products shall be inspected for chemical composition, appearance quality, mechanical properties, dimensional deviation and microstructure. The fire tube village shall also be inspected for structural correction. 5.4 Sampling The sampling of products shall comply with the provisions of Table 17. GB/T 4437.2—2003 Chemical composition Dimensions of braided pads Mechanics of braided pads Quality of braided pads Specifications of the sample In accordance with CHT174 Technical requirements or thermal properties of the furnace > The number of roots shall not be less than 2, and each batch shall be tested. The technology must conform to the requirements of IEC61004-2-1994/C65. When the root effect is 5, at least 2,
of the previous life shall be taken as the test companion:
the whole batch of roots shall be connected in batches of 2, at least 2 phases, and ten roots shall be tested at the bridge pressure end for the first time.
When the heat treatment is in the wet area, the static hot head shall be taken: 5.5 Determination of risk results
5.E, 1. When the chemical composition is not up to standard, the product is judged to be unqualified. 5.5.2 When the product size deviation and appearance are unqualified, it is judged to be unqualified. Required Article No. Inspection Method 3.2
5.5.3 When there is a sample that does not meet the requirements in the mechanical properties test results, the batch of products (including the required products represented by the unqualified sample in the original unqualified batch of products) should be re-tested. If all the re-test results are qualified, the whole batch is qualified. If one sample does not meet the requirements in the re-test, the whole batch of products or the product is unqualified, or it can be inspected piece by piece and delivered after passing. Or it can be reheated and re-sampled.
5.5.4 Determination of the results of low-power group inspection: 5.5.4.1 If there are cracks or non-metallic impurities in the low-power group inspection, the batch shall be scrapped, and the supplier shall be allowed to avoid inspection. The qualified ones shall be delivered. 5.5.4.2 If there is non-compliance due to lamination, the non-compliant product shall be printed with a certain length and then repeated inspection until it is qualified. Other products that have been tested and qualified shall be delivered after cutting. 5.5.4.3 When the whole sample is unqualified, it is allowed to cut from the front end of the product: the specified length is required, and the product shall be delivered after the maximum head length is determined. 5.5.5 When the microstructure is unqualified, the product (heat treatment furnace) is judged to be unqualified. 5.5.6 When other defects occur, the supply and demand parties of this batch of products shall negotiate and deal with it. 6. Marking, packaging, transportation, storage
6.1 Marking
6.1.1 The packaging box marking of the material shall comply with the requirements of GB/T3199. 6.1.2 Each tube should have the following markings (the foot end of the extruded tube of the material that needs to be delivered should also be marked with a \W\ mark): >> Stamped by the technical supervision department: b) Metal (or alloy) brand; d) Batch number (or smelting furnace number).
6.1. If the pipes are not marked by any method, each batch (box) of pipes shall be marked with at least two small labels or tags, and the above marks shall be used.
E.2 Packaging, transportation and storage
6.2.1 The packaging, transportation and storage of pipes shall comply with the provisions of B/T3195 (GB/T4437.2-2003).
6.2.2 For pipes with a diameter (or external diameter) not exceeding 5mm and a diameter (or external diameter) not exceeding 50mm and a diameter not exceeding 7mm, they shall not be packed and shipped after being sorted. Other packaging methods may be used with the cooperation of both parties. 6.3 Quality Certificate
Each batch of pipes shall be accompanied by a product quality certificate, indicating the supplier's name, address, telephone number and fax number
Production name
Specifications:
Batch card (or furnace number), wwW.bzxz.Net
g! Pollution and quality of parts;
h) Results of various analyses and tests, and the stamp of the technical supervision department; This standard number:
Factory date or packaging date),
Contact content
The contract for purchasing the materials listed in this standard includes the following: Product name:
b) Brand:
) Status:
(1) Size and specifications;
e! ;
The requirements of this standard shall be marked in the agreement, g) the number of this standard,
5) The result of negotiation when adding contents other than those in this standard:2 batches of materials shall be put into batches for inspection. The same alloy, shape and size shall be included in the batches. 5.3 Inspection items Each batch of products shall be inspected for chemical composition, appearance quality, mechanical properties, dimensional deviation and microstructure. The fire tube village shall also be inspected for structural correction. 5.4 Sampling The sampling of products shall comply with the provisions of Table 17. GB/T 4437.2—2003 Chemical composition Dimensions of braided pads Mechanics of braided pads Quality of braided pads Specifications of the sample In accordance with CHT174 Technical requirements or thermal properties of the furnace > The number of roots shall not be less than 2, and each batch shall be tested. The technology must conform to the requirements of IEC61004-2-1994/C65. When the root effect is 5, at least 2,
of the previous life shall be taken as the test companion:
the whole batch of roots shall be connected in batches of 2, at least 2 phases, and ten roots shall be tested at the bridge pressure end for the first time.
When the heat treatment is in the wet area, the static hot head shall be taken: 5.5 Determination of risk results
5.E, 1. When the chemical composition is not up to standard, the product is judged to be unqualified. 5.5.2 When the product size deviation and appearance are unqualified, it is judged to be unqualified. Required Article No. Inspection Method 3.2
5.5.3 When there is a sample that does not meet the requirements in the mechanical properties test results, the batch of products (including the required products represented by the unqualified sample in the original unqualified batch of products) should be re-tested. If all the re-test results are qualified, the whole batch is qualified. If one sample does not meet the requirements in the re-test, the whole batch of products or the product is unqualified, or it can be inspected piece by piece and delivered after passing. Or it can be reheated and re-sampled.
5.5.4 Determination of the results of low-power group inspection: 5.5.4.1 If there are cracks or non-metallic impurities in the low-power group inspection, the batch shall be scrapped, and the supplier shall be allowed to avoid inspection. The qualified ones shall be delivered. 5.5.4.2 If there is non-compliance due to lamination, the non-compliant product shall be printed with a certain length and then repeated inspection until it is qualified. Other products that have been tested and qualified shall be delivered after cutting. 5.5.4.3 When the whole sample is unqualified, it is allowed to cut from the front end of the product: the specified length is required, and the product shall be delivered after the maximum head length is determined. 5.5.5 When the microstructure is unqualified, the product (heat treatment furnace) is judged to be unqualified. 5.5.6 When other defects occur, the supply and demand parties of this batch of products shall negotiate and deal with it. 6. Marking, packaging, transportation, storage
6.1 Marking
6.1.1 The packaging box marking of the material shall comply with the requirements of GB/T3199. 6.1.2 Each tube should have the following markings (the foot end of the extruded tube of the material that needs to be delivered should also be marked with a \W\ mark): >> Stamped by the technical supervision department: b) Metal (or alloy) brand; d) Batch number (or smelting furnace number).
6.1. If the pipes are not marked by any method, each batch (box) of pipes shall be marked with at least two small labels or tags, and the above marks shall be used.
E.2 Packaging, transportation and storage
6.2.1 The packaging, transportation and storage of pipes shall comply with the provisions of B/T3195 (GB/T4437.2-2003).
6.2.2 For pipes with a diameter (or external diameter) not exceeding 5mm and a diameter (or external diameter) not exceeding 50mm and a diameter not exceeding 7mm, they shall not be packed and shipped after being sorted. Other packaging methods may be used with the cooperation of both parties. 6.3 Quality Certificate
Each batch of pipes shall be accompanied by a product quality certificate, indicating the supplier's name, address, telephone number and fax number
Production name
Specifications:
Batch card (or furnace number),
g! Pollution and quality of parts;
h) Results of various analyses and tests, and the stamp of the technical supervision department; This standard number:
Factory date or packaging date),
Contact content
The contract for purchasing the materials listed in this standard includes the following: Product name:
b) Brand:
) Status:
(1) Size and specifications;
e! ;
The requirements of this standard shall be marked in the agreement, g) the number of this standard,
5) The result of negotiation when adding contents other than those in this standard:3 Quality Certificate
Each batch of pipes shall be accompanied by a product quality certificate, indicating the supplier's name, address, telephone number and fax number
Production name
Specifications:
Batch card (or melting furnace number),
g! Pollution and quality of parts;
h) Results of various analysis and inspections and the stamp of the technical supervision department; This standard number:
Factory date or packaging date),
Contact content
The purchase of the materials listed in this standard includes the following: Product name:
b) Brand:
) Status:
(1) Size and specifications;
e! ;
The requirements of this standard shall be marked in the agreement, g) the number of this standard,
5) The result of negotiation when adding contents other than those in this standard:3 Quality Certificate
Each batch of pipes shall be accompanied by a product quality certificate, indicating the supplier's name, address, telephone number and fax number
Production name
Specifications:
Batch card (or melting furnace number),
g! Pollution and quality of parts;
h) Results of various analysis and inspections and the stamp of the technical supervision department; This standard number:
Factory date or packaging date),
Contact content
The purchase of the materials listed in this standard includes the following: Product name:
b) Brand:
) Status:
(1) Size and specifications;
e! ;
The requirements of this standard shall be marked in the agreement, g) the number of this standard,
5) The result of negotiation when adding contents other than those in this standard:
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.