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GB 9948-2013: [GB/T 9948-2013] Seamless steel tubes for petroleum cracking
GB 9948-2013
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.75
H 48
Replacing GB 9948-2006
Seamless steel tubes for petroleum cracking
ISSUED ON. SEPTEMBER 18, 2013
IMPLEMENTED ON. JULY 01, 2014
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 ... 5
2 Normative references ... 5
3 Classification, code ... 8
4 Ordering contents ... 9
5 Dimension, shape, weight and permissible deviation ... 9
6 Technical requirements ... 13
7 Test methods ... 23
8 Inspection rules ... 24
9 Packaging, marking and quality certificate ... 24
Annex A (informative) Comparison table of similar steel grades ... 25
Annex B (normative) Supplementary technical requirements for cracking
resistance of steel tubes of high-quality carbon structural steel used in H2S-
containing environments ... 26
Foreword
In this Standard, 5.5, 6.1. 1, 6.1.2, 6.1.3, 6.2, 6.3, 6.4, 6.5, 6.6, 6.7, 6.8, 6.9,
6.10.1, 6. 11, 7, 8, 9 are mandatory, and others are recommended.
This Standard was drafted according to the rules given in GB/T 1.1-2009.
This Standard replaces GB 9948-2006 “Seamless steel tubes for petroleum
cracking”. Compared with GB 9948-2006, in addition to the editorial
amendments, the main technical changes of this Standard are as follows.
- ADD the delivery method by minimum wall thickness;
- MODIFY the permissible deviation of the dimension of steel tubes;
- MODIFY the grade and chemical component of steel; ADD the steel grade
12Cr1Mo, 12Cr2Mo, 12Cr1MoV, 12Cr9Mo-I, 12Cr9Mo-NT, 07Cr19Ni11Ti,
022Cr17Ni12Mo2;
- MODIFY the manufacturing methods and requirements for tube billets;
- MODIFY the mechanical properties of steel tubes;
- MODIFY the heat treatment system of steel tubes;
- MODIFY the requirements for non-destructive testing.
- ADD the inter-granular corrosion test;
- ADD the supplementary technical requirements for steel tubes of high-
quality carbon structural steel used in H2S-containing environments.
This Standard was drafted by referring ASTM A335/A335M-10 “Specifications
of Ferric Alloy Steel Seamless Steel Tubes in High Temperature” (English
edition), ASTM A213/A213M-10 “Specification of Ferric and Austenitic Alloy
Steel Seamless Steel Tubes Used for Boiler, Superheater and Heat Exchanger”
(English edition) and EN 10216-2.2002 “Delivery Technical Conditions of
Seamless Steel Tube Used for Pressure - Part 2. Regulated Non-alloy Steel
and Alloy Steel with High-temperature Performance” (English edition).
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).
Drafting organizations of this Standard. Chengdu Steel and Vanadium Co., Ltd.
of Panzhihua Iron and Steel Group, An Steel Co., Ltd., Hunan Hualing Steel
Seamless steel tubes for petroleum cracking
1 Scope
This Standard specifies the classification, code, dimension, shape, weight,
technical requirements, test methods, inspection rules, packaging, marking and
quality certificate of seamless steel tubes for petroleum cracking.
This Standard is applied to the seamless steel tubes used for petrochemical
furnace tubes, heat exchanger tubes and pressure tubes.
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
diantipyrylmethane 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 223.11 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 223.13 Methods for chemical analysis of iron, steel and alloy - The
ammonium ferrous sulfate titration method for the determination of vanadium
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 223.62 Methods for chemical analysis of iron, steel and alloy - The
butyl acetate extraction photometric method for the determination of
phosphorus content
GB/T 223.63 Methods for chemical analysis of iron, steel and alloy - The
sodium (potassium) periodate photometric method for the determination of
manganese content
GB/T 223.64 Iron steel and alloyed - Determination of manganese content -
Flame atomic absorption spectrometric 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 sulfur content
GB/T 223.69 Iron steel and alloy - Determination of carbon contents - Gas-
volumetric method after combustion in the pipe furnace
GB/T 223.71 Methods for chemical analysis of iron, steel and alloy - The
gravimetric method after combustion in the pipe furnace for the
determination of carbon content
GB/T 223.72 Iron steel and alloy - Determination of sulfur content -
Gravimetric method
GB/T 223.74 Methods for chemical analysis of iron, steel and alloy - The
combustion gravimetric/gas-volumetric method for the determination of
combined carbon content
GB/T 226 Etch test for macrostructure and defect of steels
GB/T 228.1 Metallic materials - Tensile testing - Part 1. Method of test at
room temperature
GB/T 229 Metallic materials - Charpy pendulum impact test method
GB/T 231.1 Metallic materials - Brinell hardness test - Part 1. Test method
GB/T 232 Metallic materials - Bend test
GB/T 241 Metal materials - Tube - Hydrostatic pressure test
GB/T 242 Metal materials - Tube - Drift-expending test
GB/T 246 Metal materials - Tube - Flattening test
GB/T 1979 Standard diagrams for macrostructure and defect of structural
steels
a) Hot rolled (extruded, expanded) steel tube W-H;
b) Cold drawn (rolled) steel tube W-C.
4 Ordering contents
The contract or order for ordering the steel tube according to this Standard shall
include the following contents.
a) Standard number;
b) Product name;
c) Grade of steel;
d) Ordered quantity (total weight or total length);
e) Dimension specification (outside diameter × wall thickness, in mm);
f) Delivery status;
g) Special requirements.
5 Dimension, shape, weight and permissible deviation
5.1 Outside diameter and wall thickness
5.1.1 Unless otherwise specified in the contract, the steel tube shall be
delivered by the nominal outside diameter (D) and nominal wall thickness (S).
According to the requirements of demander, by consultation of the supplier and
demander, the steel tube may be delivered by the nominal outside diameter (D)
and...