YB/T 5222-2014 PDF English
Search result: YB/T 5222-2014_English: PDF (YB/T5222-2014)
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Name of Chinese Standard | Status |
| YB/T 5222-2014 | English | 195 |
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Quality hot rolled and forged carbon structural steel round tube blank
| Valid |
| YB/T 5222-2004 | English | 319 |
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Quality carbon structural steel round tube blank
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| YB/T 5222-1993 | English | 199 |
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Quality Carbon Steel seamless tube blank
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YB/T 5222-2014: PDF in English (YBT 5222-2014) YB/T 5222-2014
YB
NONFERROUS INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.60
H 43
Replacing YB/T 5222-2004
Quality hot rolled and forged carbon structural steel round
tube blank
ISSUED ON: OCTOBER 14, 2014
IMPLEMENTED ON: APRIL 01, 2015
Issued by: Ministry of Industry and Information Technology of the People's
Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Ordering content ... 7
4 Size, shape, weight and allowable deviations ... 7
5 Technical requirements ... 9
6 Test methods ... 11
7 Inspection rules ... 11
8 Packaging, marks, quality certificates ... 12
9 Numerical rounding ... 12
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard replaces YB/T 5222-2004 "Quality carbon structural steel round tube
blank". Compared with YB/T 5222-2004, the main changes in this document are as
follows:
- Delete the relevant requirements for continuous cast round tube blanks;
- Add the content related to forged round tube blanks;
- Modify the diameter range of round tube blanks;
- Modify the allowable diameter deviation;
- Modify the diameter cut slope;
- Modify the delivery state;
- Modify the relevant regulations on macrostructure.
This Standard was proposed by China Iron and Steel Industry Association.
This Standard shall be under the jurisdiction of National Technical Committee on Steel
of Standardization Administration of China (SAC/TC 183).
The drafting organizations of this Standard: Hunan Valin Xiangtan Iron and Steel Group
Co., Ltd., Hengyang Valin Steel Pipe Co., Ltd., Tianjin Iron and Steel Group Co., Ltd.,
and Metallurgical Industry Information Standards Research Institute.
Main drafters of this Standard: Liu Jianbing, Zhao Bin, Gong Wenxu, Li Xiaoli, Xiao
Hongguang, Sun Guoqing, Wang Yujie, Liu Baoshi, Wu Qingming.
Versions of standard substituted by this Standard are:
- GB/T 11172-1985;
- YB/T 5222-1993, YB/T 5222-2004.
Quality hot rolled and forged carbon structural steel round
tube blank
1 Scope
This Standard specifies the ordering content, size, shape, weight and allowable
deviations, technical requirements, test methods, inspection rules and packaging, marks,
quality certificates, etc. for quality hot rolled and forged carbon structural steel round
tube blanks.
This Standard is applicable to hot-rolled round tubes with a diameter of 50mm~400mm
and forged round tube blanks with a diameter of 60mm~900mm (hereinafter referred
to as tube blanks) for the manufacture of seamless steel pipes.
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 222, Permissible tolerances for chemical composition of steel products
GB/T 223.3, Methods for chemical analysis of iron, steel and alloy. The diantipyryl
methane phosphomolybdate gravimetric method for the determination of
phosphorus content
GB/T 223.5, Steel and iron -- Determination of acid-soluble silicon and total silicon
content -- Reduced molybdosilicate spectrophotometric method
GB/T 223.9, Iron, steel and alloy -- Determination of aluminium content -- Chrome
azurol S photometric method
GB/T 223.11, Iron, steel and alloy -- Determination of chromium content -- Visual
titration or potentiometric titration method
GB/T 223.12, Methods for chemical analysis of iron, steel and alloy. The sodium
carbonate separation-diphenyl carbazide photometric method for the determination
of chromium content
GB/T 223.18, Methods for chemical analysis of iron steel and alloy -- The sodium
thiosulfate separation iodometric method for the determination of copper content
GB/T 223.19, Methods for chemical analysis of iron, steel and alloy. The
neocuproine-chloroform extraction photometric method for the determination of
copper content
GB/T 223.23, Iron, steel and alloy -- Determination of nickel content -- The
dimethylglyoxime spectrophotometric method
GB/T 223.36, Methods for chemical analysis of iron, steel and alloy. The neutral
titration method for the determination of nitrogen content after distillation
separation
GB/T 223.37, Iron, steel and alloy -- Determination of nitrogen content --
Indophenol blue spectrophotometric method after distillation separation
GB/T 223.53, Methods for chemical analysis of iron, steel and alloy. The flame
atomic absorption spectrophotometric method for the determination of copper
content
GB/T 223.54, Iron, steel and alloy -- Determination of nickel content -- Flame
atomic absorption spectrometric method
GB/T 223.58, Methods for chemical analysis of iron, steel and alloy -- The sodium
arsenite-sodium nitrite titrimetric method for the determination of manganese
content
GB/T 223.59, Iron, steel and alloy -- Determination of phosphorus content --
Bismuth phosphomolybdate blue spectrophotometric method and antimony
phosphomolybdate blue spectrophotometric method
GB/T 223.60, Methods for chemical analysis of iron, steel and alloy -- The
perchloric acid dehydration gravimetric method for the determination of silicon
content
GB/T 223.61, Methods for chemical analysis of iron, steel and alloy -- The
ammonium phosphomolybdate volumetric method for the determination of
phosphorus content
GB/T 223.62, Methods for chemical analysis of iron, steel and alloy -- The butyl
acetate extraction photometric method for the determination of phosphorus content
GB/T 223.64, Iron, steel and alloy -- Determination of manganese content -- Flame
atomic absorption spectrometric method
GB/T 223.67, Iron, steel and alloy -- Determination of sulfur content -- Methylene
blue spectrophotometric method
GB/T 223.68, Methods for chemical analysis of iron, steel and alloy -- The potassium
iodate titration method after combustion in the pipe furnace for the determination of
Unless otherwise specified in the contract, the smelting method is chosen by the
manufacturer.
5.3 Delivery state
Tube blanks are generally delivered in hot-rolled and forged states. After negotiation
between the supplier and the purchaser and noted in the contract, delivery can also be
made in other states.
5.4 Macrostructure
5.4.1 Hot-rolled tube blanks with a diameter not greater than 250mm and forged tube
blanks with a diameter not greater than 400mm shall not have visually visible white
spots, delamination, cracks, shrinkage cavities, inclusions and skinning on the cross-
section acid-leached microstructure test pieces. However, hot-rolled tube blanks with a
diameter greater than 250mm and forged tube blanks with a diameter greater than
400mm are allowed to have shrinkage cavities not exceeding level 1.0 specified in
GB/T 1979-2001 with the consent of the purchaser and stated in the contract.
5.4.2 For the macrostructure structural defects allowed to exist in the tube blank, general
porosity, center porosity and segregation shall be evaluated according to GB/T 1979-
2001. The qualification level of tube blanks with a diameter not greater than 350mm is
not greater than level 2.5; the qualification level of tube blanks with a diameter greater
than 350mm is not greater than level 3.0.
5.4.3 After negotiation between the supplier and the purchaser, ultrasonic testing can be
used instead of macrostructure testing. Its ultrasonic testing method and qualification
level shall be specified in the contract.
5.5 Non-metallic inclusions
According to the requirements of the purchaser, the tube blanks can be inspected for
non-metallic inclusions according to Method A in GB/T 10561-2005. The qualification
level is determined by negotiation between the supplier and the purchaser.
5.6 Grain size
According to the requirements of the purchaser, the tube blank can be inspected for
austenite grain size according to GB/T 6394. The qualification level is determined
through coordination between the supplier and the purchaser.
5.7 Surface quality
5.7.1 There shall be no visible scars, folds, inclusions or cracks with a depth greater
than 0.2mm on the surface of the tube blank. It is allowed to have individual small
scratches, concave surfaces, pitting and other defects that do not exceed the negative
deviation of the diameter from the actual size.
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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