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GB/T 4436-2012

Chinese Standard: 'GB/T 4436-2012'
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GB/T 4436-2012English659 Add to Cart Days<=6 Wrought aluminum and aluminum alloy tubes. Dimensions and deviations Valid GB/T 4436-2012
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Detail Information of GB/T 4436-2012; GB/T4436-2012
Description (Translated English): Wrought aluminum and aluminum alloy tubes. Dimensions and deviations
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H61
Classification of International Standard: 77.150.10
Word Count Estimation: 33,362
Older Standard (superseded by this standard): GB/T 4436-1995
Quoted Standard: GB/T 8170
Adopted Standard: EN 754-7-2008, NEQ; EN 755-7-2008, NEQ; EN 755-8-2008, NEQ; ANSI H35.2-2009, NEQ
Drafting Organization: Southwest Aluminum (Group)Co., Ltd.
Administrative Organization: National Standardization Technical Committee of non-ferrous metals
Regulation (derived from): National Standards Bulletin No. 41 of 2012
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the aluminum and aluminum alloy tube, rectangular tube, square tube, hexagonal tubes, pipes and regular octagon oval tube dimensions and tolerances. This standard applies to aluminum and aluminum alloy extruded seam pipe, seamless


GB/T 4436-2012
Wrought aluminum and aluminum aloy tubes - Dimensions and deviations
ICS77.150.10
H61
National Standards of People's Republic of China
Replace GB/T 4436-1995
Aluminum and aluminum alloy pipe dimensions and tolerances
Released on.2012-12-31
2013-10-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
China National Standardization Administration issued
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 4436-1995 "Aluminum and aluminum alloy pipe dimensions and allowable deviation". This standard and GB/T 4436-
Compared with.1995, the main technical changes are as follows.
--- Expanded the scope of application of the standard, increased the size of extruded round pipe, rectangular pipe, square pipe, regular hexagonal pipe and regular octagonal pipe
Inch deviation requirement;
--- Expand the maximum diameter of the extruded seamless tube from the original 400mm to 450mm;
--- The maximum wall thickness of the extruded seamless tube is expanded from the original 50.00mm to 100.00mm;
--- Strictly tighten some of the index requirements for the outer diameter deviation and wall thickness deviation of the extruded seamless pipe;
--- Increased the length deviation of the extruded seamless tube, cold drawn or cold rolled round tube, cold drawn square tube and rectangular tube and the high precision requirements of the cutting inclination;
--- Increased the angular deviation requirement of the cold drawn square tube and the rectangular tube;
--- Increased the method of measuring the dimensional deviation.
This standard uses the redrafting method reference EN755-7.2008 "Aluminum and aluminum alloy extruded bars, pipes and profiles Part 7. Seamless
Dimensional deviation of pipes, EN 755-8.2008, aluminium and aluminium alloy extruded bars, pipes and profiles - Part 8
"Aluminum and aluminium alloys - Cold drawn pipes and bars - Part 7. Dimensional deviation of seamless pipes", ANSI H35.2
(M)-2009 "Dimensional deviation of aluminum processed products", with EN755-7.2008, EN755-8.2008, EN754-7.2008, ANSI
The degree of consistency of H35.2(M)-2009 is non-equivalent.
This standard is under the jurisdiction of the National Nonferrous Metals Standardization Technical Committee (SAC/TC243).
This standard is drafted by. Southwest Aluminum (Group) Co., Ltd., Nonferrous Metals Technology and Economic Research Institute.
Participated in the drafting of this standard. Northeast Light Alloy Co., Ltd., China Aluminum Aluminum Northwest Processing Branch, Shandong Yankuang Light Alloy
Company, Longkou Conglin Aluminum Co., Ltd., Zhejiang Dongqing High-tech Welding Wire Co., Ltd., Jilin Midas Aluminum Co., Ltd., Nanping, Fujian Province
Aluminum Industry Co., Ltd., Hunan Yutong Technology Group Co., Ltd.
The main drafters of this standard. Li Ruishan, Ge Lixin, Lin Lin, Fang Qingwan, Chen Qing, Yang Chunmei, Zhang Wei, Yin Yong, Pan Zhe, Zhao Haibin, Sun Zhenyu,
Wang Gang, Zheng Zhirong, Wang Lichen, Hu Junqiang, Liu Haiya.
The previous versions of the standards replaced by this standard are.
---GB/T 4436-1984, GB/T 4436-1995.
Aluminum and aluminum alloy pipe dimensions and tolerances
1 Scope
This standard specifies the dimensions and tolerances of aluminum and aluminum alloy round tubes, rectangular tubes, square tubes, regular hexagon tubes, regular octagonal tubes and elliptical tubes.
This standard applies to aluminum and aluminum alloy hot extruded slotted pipe, seamless round pipe, slotted rectangular pipe, square pipe, regular hexagonal pipe, positive octagonal
Tube, cold rolled slotted pipe, seamless pipe, cold drawn seam or seamless pipe, square tube, rectangular tube, elliptical tube.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only the dated version applies to this document.
For undated references, the latest edition (including all amendments) applies to this document.
GB/T 8170 Numerical Rounding Rules and Representation and Determination of Limit Values
3 size specifications
3.1 The typical specifications of the extruded seamless pipe are shown in Table 1.
3.2 Extrusion of the round pipe, rectangular pipe, square pipe, regular hexagonal pipe, the section specification of the regular octagonal pipe is agreed by the supplier and the buyer.
3.3 Cold drawing, the typical specifications of cold rolled slotted pipe and seamless pipe are shown in Table 2.
Table 2 Cold drawn, cold rolled slotted pipe and seamless pipe section typical specifications are in millimeters
3.4 Typical specifications for cold drawn slotted square tubes and seamless square tubes are shown in Table 3.
Table 3 Typical sections of cold drawn slotted square tubes and seamless square tubes are in millimeters
3.5 Typical specifications for cold drawn slotted rectangular tubes and seamless rectangular tubes are shown in Table 4.
3.6 The typical specifications of the section of the cold drawn slotted elliptical tube and the seamless elliptical tube are shown in Table 5.
4 size deviation
4.1 Extrusion seamless round tube
4.1.1 Outer diameter
The deviation of the outer diameter of the extruded seamless pipe shall comply with the provisions of Table 6. When high precision is required, it shall be indicated in the order form (or contract), and if it is not specified, it shall be in the ordinary grade.
Table 6 The outer diameter of the extruded seamless tube is allowed to be in millimeters.
4.1.3 Bending
The bending of the extruded seamless pipe shall comply with the provisions of Table 8. When high precision is required, it shall be indicated in the order form (or contract), if not specified
By ordinary level.
Table 8 The bending unit of the extruded seamless tube is in millimeters
4.1.4 length
The length of the indefinite rule of the extruded seamless pipe shall be not less than 300mm, and the length deviation of the length shall comply with the provisions of Table 9.
When ordering, it should be indicated in the order form (or contract). If it is not specified, it shall be in the ordinary grade. The pipe shall be supplied with a multiple ruler as the fixed length.
5mm sawing amount.
Table 9 The allowable deviation of the length of the fixed length of the extruded seamless tube is mm
4.3.10 Cutting slope
Squeeze a rectangular tube with a slit, a square tube, a regular hexagonal tube, and the ends of the regular octagonal tube shall not have burrs. The slope shall be in accordance with Table 24.
The regulations. When high precision is required, it should be indicated in the order form (or contract).
Table 24 Extrusion of rectangular tubes with square seams, square tubes, regular hexagon tubes, and the slope of the regular octagonal tubes is in millimeters.
4.4 cold drawn, cold rolled slotted pipe and seamless round pipe
4.4.1 Outer diameter
Cold drawing, the outer diameter deviation of cold-rolled pipe and seamless pipe shall comply with the requirements of Table 25. When high-precision is required, it shall be in the order form (or
Noted in the same), if not specified, according to the ordinary level.
Table 25 Cold drawn, cold rolled slotted pipe and seamless pipe with outer diameter allowable deviation in millimeters
4.4.2 Wall thickness
Cold drawing, wall thickness deviation of cold rolled slotted pipe and seamless round pipe shall comply with the requirements of Table 26. When high precision is required, it shall be in the order form (or
Noted in the same), if not specified, according to the ordinary level.
Table 26 Cold-drawn, cold-rolled seamed pipe and seamless pipe wall thickness tolerance in millimeters
4.4.3 Curvature
The bending of cold drawn, cold rolled and round tubes and seamless tubes are shown in Table 27.
Table 27 Cold drawing, cold rolled slotted pipe and seamless pipe bending unit in millimeters
4.4.4 Length
The length of the cold-rolled, cold-rolled seamed pipe and the seamless pipe shall be not less than 300mm, and the length deviation shall be in accordance with Table 28.
Regulations. When high precision is required, it should be indicated in the order form (or contract). If it is not specified, it shall be in the ordinary grade.
Material, each saw should have a 5mm sawing amount.
Table 28 Cold-drawn, cold-rolled slit pipe and seamless pipe length tolerance unit is mm
4.4.5 Cutting slope
Cold drawn, cold-rolled seams or seamless round tubes shall have no burrs at the ends, and the slope shall comply with the requirements of Table 29. When high precision is required,
In the order form (or contract), if not specified, press the ordinary level.
Table 29 Cold-drawn, cold-rolled seams or seamless tubes with a slope of mm
4.5 cold drawn square tube, rectangular tube
4.5.1 Width or height
Cold drawn seams or seamless square tubes. The width or height deviation of rectangular tubes should meet the requirements of Table 30. When high precision is required, it should be ordered.
Indicated in the manifest (or contract), if not specified, according to the general level.
Table 30 Cold drawn seamed or seamless square tube, the width or height of the rectangular tube is allowed to be in millimeters
4.5.2 Wall thickness
Cold drawn seams or seamless square tubes. The wall thickness deviation of rectangular tubes should meet the requirements of Table 31. When high precision is required, it should be on the order form (or
Indicated in the contract), if not specified, according to the general level.
Table 31 Cold drawn seamed or seamless square tube, wall thickness tolerance of rectangular tube is in millimeters
4.5.3 Bending
Cold drawn seamed or seamless square tube, the bending of the rectangular tube should meet the requirements of Table 32. When high precision is required, it should be in the order form (or
Noted in the same), if not specified, according to the ordinary level.
Table 32 Cold drawn seamed or seamless square tube, rectangular tube bending unit is mm
4.5.4 Twisting degree
Cold drawn seams or seamless square tubes, the twisting of rectangular tubes shall comply with the requirements of Table 33. When high precision is required, it shall be in the order form (or
Noted in the same), if not specified, according to the ordinary level.
Table 33 Cold drawn seamed or seamless square tube, twisted unit of rectangular tube is mm
4.5.5 Plane clearance
Cold drawn seams or seamless square tubes, the plane clearance of rectangular tubes shall comply with the requirements of Table 34. When high precision is required, it shall be on the order form (or
Indicated in the contract), if not specified, according to the general level.
Table 34 Cold drawn seamed or seamless square tube, rectangular tube with a gap of mm
4.5.6 Angle
Cold drawn seamed or seamless square tube, the angular deviation of the rectangular tube should meet the requirements of Table 35. When high precision is required, it should be on the order form (or
Indicated in the contract), if not specified, according to the general level.
Table 35 Cold drawn seamed or seamless square tube, rectangular tube angle deviation unit is mm
4.5.7 length
Cold drawn seamed or seamless square tube, the length of the rectangular tube shall be not less than 300mm, and the length deviation of the fixed length shall comply with Table 36.
Regulations. When high precision is required, it should be indicated in the order form (or contract). If it is not specified, it shall be in the ordinary grade.
Material, each saw should have a 5mm sawing amount.
Table 36 Cold drawn seamed or seamless square tube, the length of the rectangular tube is allowed to be in millimeters
4.6 cold drawn seamed or seamless elliptical tube
4.6.1 Long and short axes
The deviation of the long and short axes of cold drawn seamed or seamless elliptical tubes shall comply with the requirements of Table 38. When high precision is required, the order shall be in the order form.
(or contract), if not specified, according to the general level.
Table 38 The allowable deviation of the long and short axes of a cold drawn slotted or seamless elliptical tube is mm
4.6.2 Wall thickness
The wall thickness deviation of cold drawn seamed or seamless elliptical tubes shall comply with the requirements of Table 39. When high precision is required, it shall be in the order form (or contract).
Note, if not specified, press the normal level.
Table 39 Wall thickness tolerances for cold-drawn or seamless elliptical tubes are in millimeters
4.6.3 Bending
The bending of cold drawn seams or seamless elliptical tubes shall comply with the requirements of Table 40. When high precision is required, it shall be noted in the order form (or contract).
Ming, if not specified, press the ordinary level.
Table 40 The bending unit of cold drawn seamed or seamless elliptical tube is mm
4.6.4 Length
The length of the indeterminate strip of cold drawn seamed or seamless elliptical tube shall be not less than 300mm, and the allowable deviation of the length of the fixed length shall be 150 mm.
Pipes supplied with a multiple ruler as a fixed length, each sawing should have a sawing amount of 5mm.
4.6.5 Cutting slope
Cold-stitched or seamless elliptical tubes shall be cut at both ends and shall not have burrs.
5 Method for measuring dimensional deviation
5.1 size repair
Dimensional measurement values are not allowed to be repaired, and the method of determining the limit value shall comply with the provisions of GB/T 8170.
5.2 Dimensional measurement
5.2.1 Outer diameter (or inner diameter), long or short axis, side length, width, height, face spacing
Measuring with a gauge with an accuracy of 0.02 mm.
5.2.2 Wall thickness
Measuring with a gauge with an accuracy of 0.01 mm.
5.2.3 Angle
5.2.3.1 Square tube, rectangular tube
Measure the 90° angle between the square tube and the rectangular tube with a caliper, steel ruler, R gauge and other measuring tools or special instruments with corresponding precision.
Offset (as shown in Figure 1), the deviation (Z) is the angular deviation.
5.2.3.2 Regular hexagonal tube
Measure the deviation of the 60° angle in the regular hexagonal tube by using a caliper with a corresponding accuracy, a steel ruler, an R gauge, or a special instrument.
The deviation value (Z) is the angular deviation.
5.2.3.3 Positive octagonal tube
The deviation of the 45° angle in the regular octagonal tube is measured by using a caliper with a corresponding precision, a steel ruler, a R gauge, or a special instrument.
The deviation value (Z) is the angular deviation.
Figure 1 Schematic diagram of angular deviation measurement
5.2.4 Fillet radius, chamfer radius
Measuring with a precision caliper, steel ruler, micrometer, R gauge, etc. or special instrument.
5.2.5 length
Measuring with a gauge with an accuracy of 1 mm.
5.2.6 Cutting slope
The maximum clearance (N) between the theoretical vertical end face and the actual end face of the pipe is measured by a gage of corresponding accuracy, as shown in Fig. 2. The maximum interval
The gap (N) is the end face slope.
Figure 2 Schematic diagram of the slope measurement
5.2.7 Curvature
As shown in Fig. 3, the pipe is placed on the platform, and the pipe is placed in the longitudinal direction by a straight ruler with a length of 300 mm when the pipe is stabilized by its own weight.
The surface of the material, the measured maximum gap value (hs) between the pipe and the ruler, that is, the bending value of "arbitrary 300mm length";
The 1000mm ruler is placed on the surface of the pipe in the longitudinal direction. The measured maximum gap value (hs) between the pipe and the ruler is “any 1000mm”.
The bending value of the length; the maximum gap value (ht) between the pipe and the platform is measured, and the maximum gap value (ht) is divided by the total length of the pipe.
(L), the obtained quotient is the curvature of "average per meter length". If the total length of the pipe is 5800mm, the maximum gap between the pipe and the platform
The value (ht) is 8mm, then the "average length per meter" bend is. 1.38mm (8 divided by 5.8 to obtain the quotient).
Figure 3 Schematic diagram of bending measurement
5.2.8 Plane clearance
As shown in Figure 4, the pipe is placed on the platform, and the pipe is measured between the pipe and the platform in the lateral direction (width W) when the pipe is stabilized by its own weight.
The maximum gap value (f); or the ruler is placed on the surface of the pipe in the transverse direction, and the maximum gap value (f) between the pipe and the ruler is measured, the maximum gap
The value (f) is the plane gap.
Figure 4 Schematic diagram of plane gap measurement
5.2.9 Twisting degree
As shown in Figure 5, the wide surface of the pipe (width W) is placed on the platform, and the pipe is freely measured by its own weight.
The maximum height of the 1000mm length section due to twisting and tilting, that is, the twist value of "any 1000mm length"; the measured whole pipe
The maximum height (T) of twisting and tilting is the "full length" twisting value.
Related standard:   GB/T 4437.2-2017  GB/T 4437.1-2015
   
 
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