GB/T 8163-2018 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 8163-2018 | English | 145 |
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Seamless steel pipes for liquid service
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| GB/T 8163-2008 | English | 70 |
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Seamless steel tubes for liquid service
| Obsolete |
| GB/T 8163-1999 | English | 279 |
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Seamless steel tubes for liquid service
| Obsolete |
| GB/T 8163-1987 | English | RFQ |
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Seamless steel pipes for liquid service
| Obsolete |
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GB/T 8163-2018: Seamless steel pipes for liquid service---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT8163-2018
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.75
H 48
Replacing GB/T 8163-2008
Seamless steel pipes for liquid service
Issued on. MAY 14, 2018
Implemented on. FEBRUARY 1, 2019
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration Committee.
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative references... 5
3 Order content... 7
4 Size, shape and weight... 8
5 Technical requirements... 11
6 Test methods... 18
7 Inspection rules... 19
8 Packaging, marks and quality certificate... 20
Annex A (normative) Galvanized layer... 21
1 Scope
This Standard specifies the order content, size, shape, weight, technical
requirements, test methods, inspection rules, packaging, marks and quality
certificates of seamless steel pipes for liquid service.
This Standard is applicable to the seamless steel pipes for ordinary liquid
service.
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, Method of sampling steel for determination of chemical
composition and permissible variations for product analysis
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 aluminum content -
Chrom 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 223.14, Methods for Chemical Analysis of Iron, Steel and Alloy - The
N-Benzoy-N-Phenylhydroxylamine Extraction Photometric Method for the
Determination of Vanadium 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
3 Order content
Contracts or orders for ordering steel pipes in accordance with this Standard
shall include the following information.
a) reference to this Standard;
b) product name;
c) steel designation, quality grade shall include quality grade;
d) size specifications;
e) quantity ordered (total weight or total length);
4 Size, shape and weight
4.1 Outer diameter and wall thickness
The nominal outer diameter D and the nominal wall thickness S of the steel pipe
shall comply with the provisions of GB/T 17395.According to the requirements
of the purchaser, other steel pipes of outer diameter and wall thickness can be
supplied through negotiation between the supplier and the purchaser.
4.2 Allowable deviation of outer diameter and wall thickness
4.2.1 The allowable deviation of the outer diameter of the steel pipe shall
comply with the requirements of Table 1.
4.3 Length
4.3.1 Normal length
The normal length of steel pipe is 3000mm~12000mm. According to the
requirements of the purchaser, the steel pipe outside the normal length can be
supplied through negotiation between the supplier and the purchaser.
4.3.2 Range length
According to the requirements of the purchaser, after negotiation between the
supplier and the purchaser, and indicated in the contract, the steel pipe can be
delivered according to the range length.
4.3.3 Fixed length and multiple length
4.3.3.1 According to the requirements of the purchaser, after negotiation
between the supplier and the purchaser, and indicated in the contract, the steel
pipe can be delivered according to a fixed length or multiple length.
4.3.3.2 When the steel pipe is delivered in a fixed length or multiple length, the
length tolerance shall comply with the following provisions.
4.3.3.3 After negotiated between the supplier and the purchaser, other steel
pipes with other allowable deviation of the length can be supplied.
4.4 Curvature
4.4.1 The curvature per meter of steel pipe shall comply with the requirements of Table 4.
4.4.2 The full-length curvature of the steel pipe shall not exceed 0.15% of the
total length of the steel pipe.
4.5 Un-roundness and uneven wall thickness
According to the requirements of the purchaser, the supplier and the purchaser
shall negotiate and indicate in the contract that the un-roundness and wall
thickness of the steel pipe shall not exceed 80% of the nominal outer diameter
tolerance and the nominal wall thickness tolerance respectively.
4.6 Tip shape
4.7 Weight
4.7.1 Steel pipes are delivered either according to actual weight or according to
theoretical weight. The theoretical weight of steel pipe is calculated according
to the provisions of GB/T 17395,
4.7.2 According to the requirements of the purchaser, the supplier and the
purchaser shall negotiate and indicate in the contract that the allowable
deviation of the actual weight of the delivered steel pipe from the theoretical
weight shall comply with the following provisions.
5 Technical requirements
5.1 Steel designation and chemical composition
5.1.1 The steel pipe is made of steels with designations of 10, 20, Q345, Q390, Q420 and Q460.
5.1.2 The chemical composition (melting analysis) of steels with designations
of 10 and 20 shall comply with the requirements of Table 5.
5.1.3 The chemical composition (melting analysis) and carbon equivalent of the
steels with designations of Q345, Q390, Q420 and Q460 shall comply with the
requirements of Table 6.According to the requirements of the purchaser, steel
pipes of other designations or chemical compositions may be supplied through
negotiation between the supplier and the purchaser.
5.1.4 When the purchaser requests to do the finished product analysis, it shall
be indicated in the contract. The chemical composition allowable deviation of
the finished steel pipe shall comply with the provisions of GB/T 222.
5.2 Manufacturing method
5.2.1 Steel smelting method
Steel shall be smelted by electric arc furnace plus furnace refining or oxygen
converter plus furnace refining method.
After negotiation between the supplier and the purchaser, other methods of
higher requirements may also be used for smelting. When the purchaser
specifies a certain smelting method, it shall be indicated in the contract.
5.3 Delivery status
5.3.1 Hot rolled (expanded) steel pipes can be delivered in hot rolled (expanded)
or heat treated condition. When the purchaser requests the heat treatment
status, it shall be indicated in the contract.
5.3.2 Cold drawn (rolled) steel pipes shall be delivered in an annealed or high
temperature tempered condition.
5.4 Mechanical properties
5.4.1 Tensile properties
The longitudinal tensile properties of the steel pipe in the delivery status shall
comply with the requirements of Table 7.
5.4.2 Impact
5.4.2.1 The quality grades for steel pipes with designations of Q345, Q390,
Q420, Q460 are B, C, D, E.
5.4.2.2 The impact absorption energy in Table 7 is the Charpy V-notch impact
absorption energy requirement value of the standard size sample. When the
size of the steel pipe cannot prepare a standard size sample, a small size
sample can be prepared. When using small-sized impact sample, the minimum
Charpy V-notch impact energy requirements shall be the standard-size sample
impact energy requirements multiplied by the decreasing factor in Table 8.The
size of the impact sample shall be preferentially selected to a larger size.
5.5 Process performance
5.5.1 Flattening
For 10, 20, Q345, Q390 designations of steel pipes with an outer diameter
greater than 22mm~600mm and a wall thickness to outer diameter ratio of not
more than 10%, the flattening test shall be carried out. Flattening test plate
spacing H is calculated according to formula (1).
5.5.2 Flaring
According to the requirements of the purchaser, the supplier and the purchaser
shall negotiate and indicate in the contract that 10, 20 and Q345 designations
of steel pipes with an outer diameter of not more than 76 mm and a wall
thickness of not more than 8 mm may be subject to the flaring test.
5.5.3 Bending
According to the requirements of the purchaser, after negotiation between the
supplier and the purchaser, and indicated in the contract, the steel pipe with an
outer diameter of not more than 22mm can be bent.
5.6 Hydraulic pressure
5.6.1 Steel pipes shall be hydraulically tested one by one. The test pressure is
calculated according to formula (2). The maximum test pressure does not
exceed 19.0MPa. Under the test pressure, the voltage regulation time shall be
no less than 5s, and the steel pipe shall not leak.
5.7 Surface quality
The inner and outer surfaces of steel pipes shall be free from visible cracks,
folds, crusting, rolling and separation. These defects shall be completely
removed. The depth of removal shall not exceed the lower deviation of the
nominal wall thickness.
5.8 Ultrasonic testing
According to the requirements of the purchaser, after negotiation between the
supplier and the purchaser, and indicated in the contract, the steel pipe can be
ultrasonically tested, and the acceptance level is L4 in GB/T 5777-2008.
5.9 Galvanized layer
According to the requirements of the purchaser, after negotiation between the
supplier and the purchaser, and indicated in the contract, the steel pipe can be
galvanized for delivery.
6 Test methods
6.1 The chemical composition analysis of steel pipe is carried out according to
the rules of GB/T 20066.Chemical composition analysis is usually carried out
according to GB/T 4336, GB/T 20123, GB/T 20124, GB/T 20125 or other
common methods. During arbitration, it shall be in accordance with GB/T 223.5,
GB/T 223.9, GB/T 223.11, GB/T 223.12, GB/T 223.14, GB/T 223.19, GB/T
223.23, GB/T 223.26, GB/T 223.37, GB/T 223.40, GB/T 223.59, GB/T 223.63,
GB/T 223.68, GB/T 223.81, GB/T 223.84, GB/T 223.86, GB/T 20125.
6.2 The size and shape of the steel pipe shall be measured with a gage that
meets the accuracy requirements.
6.3 The inner and outer surfaces of steel pipes shall be visually inspected under
adequate lighting conditions.
6.4 Sampling methods and test methods for other inspection items of steel
pipes shall comply with the requirements of Table 10.
7 Inspection rules
7.1 Inspection and acceptance
The inspection and acceptance of steel pipes shall be carried out by the
supplier’s quality and technical supervision department.
7.2 Batching rules
7.2.1 Steel pipes shall be inspected and accepted in batches.
7.2.2 If the steel pipe is not heat treated after being cut into individual pieces,
all pipe sections taken from the steel pipe rolled by one tube shall be regarded
as one.
7.2.3 Each batch shall consist of steel pipes of the same designation, the same
heat number, the same specification, and the same heat treatment system
(furnace number). The quantity of each batch of steel pipes shall not exceed
the following provisions.
7.3 Sampling quantity
The sampling quantity of each batch of steel pipe inspection shall comply with
the provisions of Table 10.
7.4 Re-inspection and determination rules
The re-inspection and determination rules of steel pipes shall comply with the
provisions of GB/T 2102.
8 Packaging, marks and quality certificate
8.1 The packaging, marks and quality certificate of steel pipes shall comply with
the provisions of GB/T 2102.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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