GB/T 17395-2024_English: PDF (GB/T17395-2024)
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Standard ID | GB/T 17395-2024 (GB/T17395-2024) | Description (Translated English) | Dimensions, shapes, masses and tolerances of steel tubes | Sector / Industry | National Standard (Recommended) | Classification of Chinese Standard | H48 | Classification of International Standard | 77.140.75 | Word Count Estimation | 54,543 | Date of Issue | 2024-09-29 | Date of Implementation | 2025-04-01 | Older Standard (superseded by this standard) | GB/T 17395-2008,GB/T 21835-2008 | Drafting Organization | Metallurgical Industry Information Standards Research Institute, Hengyang Valin Steel Pipe Co., Ltd., Jiangsu Changbao Plessen Steel Pipe Co., Ltd., Zhejiang Lunbao Pipe Co., Ltd., Jiangsu Yaxin Precision Technology Co., Ltd., Shanxi TISCO Stainless Steel Pipe Co., Ltd., Zhejiang Taifu Seamless Steel Pipe Co., Ltd., Chengde Jianlong Special Steel Co., Ltd., Jiangsu Tianhuai Steel Pipe Co., Ltd., Zhejiang Yongshang Special Materials Co., Ltd., Panyu Zhujiang Steel Pipe (Zhuhai) Co., Ltd., Huadi Steel Group Co., Ltd., Zhejiang Jinzhou Pipe Dao Technology Co., Ltd., Jiangyin Hongteng Machinery Co., Ltd., Jiangyin Nanfang Stainless Steel Pipe Co., Ltd., Inner Mongolia Baotou Steel Union Co., Ltd., Shandong Special Equipment Inspection Institute Group Co., Ltd., Jiangsu Chengde Steel Pipe Co., Ltd., Jiangsu Youfa Steel Pipe Co., Ltd., Shandong Juncheng Green | Administrative Organization | National Technical Committee for Standardization of Steel (SAC/TC 183) | Issuing agency(ies) | State Administration for Market Regulation, National Standardization Administration | Standard ID | GB/T 17395-2008 (GB/T17395-2008) | Description (Translated English) | Dimensions, shapes, masses and tolerances of seamless steel tubes | Sector / Industry | National Standard (Recommended) | Classification of Chinese Standard | H48 | Classification of International Standard | 77.140.75 | Word Count Estimation | 35,392 | Date of Issue | 2008-05-13 | Date of Implementation | 2008-11-01 | Older Standard (superseded by this standard) | GB/T 17395-1998 | Adopted Standard | ISO 4200-1991, NEQ; ISO 5252-1991, NEQ; ISO 1127-1992, NEQ | Drafting Organization | Panzhihua Iron and Steel Group Chengdu Iron & Steel Co., Ltd. | Administrative Organization | National Steel Standardization Technical Committee | Regulation (derived from) | National Standard Approval Announcement 2008 No.8 (Total No.121) | Proposing organization | China Iron and Steel Industry Association | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, China National Standardization Administration Committee | Summary | This standard specifies the dimensions of seamless steel tubes, shape, weight and tolerances. This standard applies to the development of the various uses of plain end seamless steel standard time, select the size, shape, weight and tolerances. | Standard ID | GB/T 17395-1998 (GB/T17395-1998) | Description (Translated English) | Dimensions, shapes, masses and tolerances of seamless steel tubes | Sector / Industry | National Standard (Recommended) | Classification of Chinese Standard | H48 | Classification of International Standard | 77.140.75 | Word Count Estimation | 30,395 | Date of Issue | 1998/5/28 | Date of Implementation | 1998/12/1 | Adopted Standard | ISO 1127-1992, NEQ; ISO 4200-1991, NEQ; ISO 5252-1991, NEQ | Regulation (derived from) | Announcement of Newly Approved National Standards No. 8, 2008 (No. 121 overall) | Proposing organization | Ministry of Metallurgical Industry of the People Republic of China | Issuing agency(ies) | State Quality and Technical Supervision |
GB/T 17395-2024
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.75
CCS H 48
GB/T 17395-2024
Replacing GB/T 17395-2008, GB/T 21835-2008
Dimensions, shapes, masses and tolerances of steel tubes
ISSUED ON: SEPTEMBER 29, 2024
IMPLEMENTED ON: APRIL 01, 2025
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 6
2 Normative references ... 6
3 Terms and definitions ... 6
4 Dimension specifications ... 6
5 Length ... 49
6 Shape ... 50
7 Mass ... 52
Bibliography ... 53
Foreword
This document was drafted in accordance with the provisions of GB/T 1.1-2020
“Directives for standardization - Part 1: Rules for the structure and drafting of
standardizing documents”.
This document integrates and revises GB/T 17395-2008 “Dimensions, shapes, masses
and tolerances of seamless steel tubes” and GB/T 21835-2008 “Dimensions and masses
per unit length of welded steel pipes”.
Compared with GB/T 17395-2008 “Dimensions, shapes, masses and tolerances of
seamless steel tubes”, in addition to structural adjustments and editorial changes, this
document has the following major technical changes:
a) MODIFY the outer diameter and wall thickness specification table of common
steel tubes, and EXPAND the outer diameter and wall thickness specification
range (see Table 1 and Table 2 of this document, Table 1 of GB/T 17395-2008);
b) DELETE the outer diameter series of precision steel tubes (see Table 3 of this
document, Table 2 of the 2008 edition);
c) MODIFY the outer diameter and wall thickness specification table of precision
steel tubes, and EXPAND the outer diameter and wall thickness specification
range (see Table 3 of this document, Table 2 of GB/T 17395-2008);
d) MODIFY the outer diameter and wall thickness specification table of stainless
steel tubes, and EXPAND the outer diameter and wall thickness specification
range (see Table 4 of this document, Table 3 of GB/T 17395-2008);
e) ADD the inner diameter tolerances (see 4.3.3 of this document);
f) ADD the minimum wall thickness tolerances (see 4.3.5 of this document).
Compared with GB/T 21835-2008 “Dimensions and masses per unit length of welded
steel pipes”, in addition to structural adjustments and editorial changes, this document
has the following major technical changes:
a) MODIFY the wall thickness series of common steel tubes (see Table 1 and Table
2 of this document, Table 1 of GB/T 21835-2008);
b) MODIFY the outer diameter and wall thickness specification table of common
steel tubes, and EXPAND the outer diameter and wall thickness specification
range (see Table 1 and Table 2 of this document, Table 1 of GB/T 21835-2008);
c) DELETE the outer diameter series of precision steel tubes (see Table 3 of this
document, Table 2 of the 2008 edition);
Dimensions, shapes, masses and tolerances of steel tubes
1 Scope
This document specifies the dimensions, shapes, masses and tolerances of steel tubes.
This document applies to the selection of dimension, shape, mass and tolerance when
formulating standards for circular steel tubes for various purposes.
2 Normative references
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
GB/T 30062 Terminology of steel pipes and tubes
3 Terms and definitions
For the purpose of this document, the terms and definitions defined in GB/T 30062
apply.
4 Dimension specifications
4.1 Outer diameter series
Except for the nominal outer diameter (D) of precision steel tubes, the nominal outer
diameters of other steel tubes are divided into three series: Series 1, Series 2 and Series
3. Series 1 is a general series and is recommended; Series 2 is a non-general series;
Series 3 is a few special and dedicated series.
4.2 Outer diameter and wall thickness
The nominal outer diameter and nominal wall thickness (S) of common steel tubes are
shown in Table 1 (S ≤ 65 mm) and Table 2 (S > 65 mm); the nominal outer diameter
and nominal wall thickness of precision steel tubes are shown in Table 3; the nominal
outer diameter and nominal wall thickness of stainless steel tubes are shown in Table 4.
......
GB/T 17395-2008
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.75
H 48
Replacing GB/T 17395-1998
Dimensions, Shapes, Masses and Tolerances of
Seamless Steel Tubes
ISSUE ON. MAY 13, 2008
IMPLEMENTED ON. NOVEMBER 1, 2008
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People’s Republic of China;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Outside diameter and wall thickness ... 4
3 Length ... 34
4 Shapes ... 35
5 Masses ... 36
Foreword
This Standard corresponds to ISO 4200.1991 "Plain end steel tubes, welded and
seamless - General tables of dimensions and masses per unit-length", ISO 5252.1991
"Steel tubes - Tolerance systems" and ISO 1127.1992 "Stainless steel tubes -
Dimensions, tolerances and conventional masses per unit-length". This Standard is
not equivalent to ISO 4200.1991, ISO 5252.1991 and ISO 1127.1992.
This Standard replaces GB/T 17395-1998 "Dimensions shapes, masses and
tolerances of seamless steel tubes". Compared with GB/T 17395-1998, the main
changes of this Standard are as follows.
— Common steel pipe outside diameters 232, 267(267.4), 302, 318.5, 368, 419,
473, 699, 711, 720, 762, 788.5, 813, 864, 914, 965, 1016 are added;
— Upper limit of wall thickness of common steel tube is modified;
— Unit-length theoretical weight in Table 1 and Table 2 is modified;
— In Table 3, 0.5, 0.6, 0.7, 0.8, 0.9 are added to the wall thickness for outside
diameter of steel pipe whose;
— Overall length tolerances 0
15 mm level is added;
— "ellipticity" is changed into "noncircularity"; “noncircularity" calculation formula is
added;
— Upper limit of usual length is changed from “12000mm" to “12500mm";
— Tolerances requirements between actual weight and theoretical weight are
modified.
This Standard was proposed by China Iron & Steel Association.
This Standard shall be under the jurisdiction of China Steel Standardization Technical
Committee
Drafting organization of this Standard. Pangang steel Group, Chengtu steel Co., Ltd,
and China Metallurgical Information Standardization Research Institute.
Chief Drafting Staffs of this Standard. Yan Ru, Li Zhi, Huang Ying and Liqi.
This Standard is first-time issued in May 1998.
Dimensions, Shapes, Masses and Tolerances of
Seamless Steel Tubes
1 Scope
This Standard specifies seamless steel tube size, shape, masses and tolerances.
This Standard is applicable to selection of size, shape, masses and tolerances in
formulating all kinds of flat-end seamless steel tube.
2 Outside diameter and wall thickness
2.1 Classification
Outside diameter and wall thickness of steel tube can be divided into three classes.
outside diameter and wall thickness of common steel tube (refer to Table 1); outside
diameter and wall thickness of precision tube (refer to Table 2), and outside diameter
and wall thickness of stainless steel tube (refer to Table 3).
2.2 Outside diameter
Outside diameter of steel tube can be divided into three series. series 1, series 2 and
series 3. Series 1 is the common series, belonging to the recommended adopted
series; series 2 is not the common series; series 3 is the special series.
Outside diameter of common steel tube can be divided into series 1, series 2 and
series; outside diameter of precision tube can be divided into series 2 and series 3;
outside diameter of stainless steel tube can be divided into series 1, series 2 and
series 3.
2.3 Permissible tolerance
2.3.1 Outside diameter and wall thickness tolerances selection
2.3.1.1 For selection of permissible tolerance of outside diameter and wall thickness,
steel tube application and technological equipment shall be taken into consideration.
2.3.1.2 Tolerances of outside diameter and wall thickness adopted in product standard
shall be superior to standardized tolerances. According to customer requirements and
product, non-standardized or other tolerances can be adopted.
2.3.2 Outside diameter tolerances
GB 4287-2012
Table 7 Non-standardized wall thickness tolerances Unit. millimeter
Tolerance grade Non-standardized wall thickness tolerances
NS1 +15.0%s -12.5%S
NS2 +15.0%S -10.0%S
NS3 +12.5%S -10.0%S
NS4 +12.5%s -7.5%S
Note. S is the nominal wall thickness of steel tube.
2.3.3.3 Steel tube of special purpose and cold rolling (pull) Steel tube wall thickness
tolerances may adopt absolute tolerance.
3 Length
3.1 Usual length
Usual length of steel tube is 3 000mm ~ 12 500mm.
3.2 Fixed-length and multiple-length
Fixed-length and multiple-length shall be within usual length; overall length tolerances
can be divided into four grades (refer to Table 8). Each multiple-length will reserve the kerf
surplus according to the requirements below.
a) For outside diameter ≤159 mm. 5 mm~10mm;
b) For outside diameter >159mm. 10mm~15mm.
Table 8 Overall length tolerances Unit. millimeter
Tolerance grade Overall length tolerances
L1 +20 0
L2 +15 0
L3 +10 0
L4 +5 0
3.3 Steel tube length of special purposes
For steel tubes of special purposes, such as stainless acid resistant ultra-steel thin wall
GB 4287-2012
tuber, the length requirements for minor diameter steel tube can be stipulated otherwise.
4 Shapes
4.1 Degree of curvature
Degree of curvature of steel tube can be divided into overall length degree of curvature
and degree of curvature of each meter.
4.1.1 Degree of curvature of overall length
Degree of curvature surveyed of the overall length of steel tube can be named as degree
of curvature of overall length; degree of curvature of overall length can be divided into 5
classes (refer to Table 9).
Table 9 Degree of curvature of overall length Unit. millimeter
Grade of degree of curvature Degree of curvature of overall length, not greater than
E1 0.2%L
E2 0.15%L
E3 0.1%L
E4 0.08%L
E5 0.06%L
Note. L is length of single steel tube.
4.1.2 Degree of curvature of each meter
Degree of curvature surveyed is referred as the degree of curvature of each meter;
degree of curvature of each meter can be divided into 5 classes (refer to Table 10).
Table 10 Degree of curvature of each meter Unit. millimeter
Grade of degree of curvature Degree of curvature of each meter, not greater than
F1 3.0
F2 2.0
F3 1.5
F4 1.0
F5 0.5
4.2 Noncircularity
Noncircularity of steel tube can be divided into 4 grades (refer to Table 11).
GB 4287-2012
Table 11 Noncircularity
Grades of noncircularity Noncircularity, no greater than outside diameter tolerance
NR1 80%
NR2 70%
NR3 60%
NR4 50%
a Noncircularity calculation formula is. %100)(2
minmax
minmax
DD
DD , Where. Dmax is the maximum value of cross
section’s outside diameter., Dmin is the minimal value of cross section’s outside diameter..
5 Masses
5.1 Delivery of steel tube can be carried out by referring to actual weight; theoretical
weight can also be served as the standard. Actual weight delivery can be divided into
single pipe masses or batch weight.
5.2 Refer to Formula (1) for the calculation of theoretical weight of the steel tube.
1000/)( SSDW ... (1)
Where.
W — Theoretical weight of steel tube; the unit is kilogram/ meter (kg/m);
1416.3 ;
— Intensity of steel; unit is kilogram/ cubic decimeter (kg/dm3);
D — nominal outside diameter of steel tube; unit. millimeter (mm);
S — nominal wall thickness of steel tube; unit. millimeter (mm).
5.3 As for steel tube delivered according to theoretical weight, tolerances between actual
weight and theoretical weight can be stipulated. Tolerances between single steel tube
actual weight and theoretical weight can be divided into 5 classes (refer to Table 12).
Tolerances between theoretical weight and actual weight of each batch not less than 10 t
can be ±7.5 or ±5%.
Table 12 Permissible tolerances of masses
Tolerance grade Tolerances masses of single steel tube
W1 ±10%
W2 ±7.5%
W3 +10% -5%
W4 +10%
GB 4287-2012
-3.5%
W5 +6.5% -3.5%
......
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