GB/T 32970-2016 PDF English
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Longitudinal submerged-arc welded steel pipe for high pressure service at high temperatures
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GB/T 32970-2016: PDF in English (GBT 32970-2016) GB/T 32970-2016
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.75
H 48
Longitudinal Submerged-Arc Welded Steel Pipe for
High Pressure Service at High Temperatures
ISSUED ON. AUGUST 29, 2016
IMPLEMENTED ON. JULY 1, 2017
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative Reference ... 4
3 Terms and Definitions ... 6
4 Ordering Contents ... 7
5 Dimension, Shape, Weight and Permissible Deviation ... 7
6 Technical Requirements ... 10
7 Test Methods ... 21
8 Inspection Rules ... 21
9 Package, Mark and Quality Certificate ... 23
Foreword
This Standard was drafted as per the rules specified in GB/T 1.1-2009.
This Standard was proposed by China Iron and Steel Industry Association.
This Standard shall be under the jurisdiction of National Technical Committee for
Standardization of Steel (SAC/TC 183).
Drafting organizations of this Standard. Jiangsu Tongyu Steel Pipe Group Co., Ltd.,
Panyu Chu Kong Steel Pipe (Zhuhai) Co., Ltd., and China Metallurgical Information
and Standardization Institute.
Chief drafting staffs of this Standard. Fang Xiaodong, Lu Ning, Mo Minling, Dong Li,
Tao Hengchao, Huang Kejian, and Tang Qun.
Longitudinal Submerged-Arc Welded Steel Pipe for
High Pressure Service at High Temperatures
1 Scope
This Standard specifies the terms and definitions, ordering contents, dimension, shape,
weight and permissible deviation, technical requirements, test methods, inspection
rules, as well as package, mark and quality certificate of the longitudinal submerged-
arc welded steel pipe for high pressure serve at high temperature (hereinafter referred
to as steel pipe).
This Standard is applicable to the carbon steel and alloy steel longitudinal submerged-
arc welded steel pipe used by petroleum refining and coal chemical high temperature
and high pressure pipes.
2 Normative Reference
The following documents are essential to the application of this document. For the
dated documents, only the versions with the dates indicated are applicable to this
document; for the undated documents, only the latest version (including all the
amendments) are applicable to this document.
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 223.10 Methods for Chemical Analysis of Iron, Steel and Alloy - the
Cupferron Separation-Chrome Azurol S Photometric Method for the Determination
of Aluminum Content
GB/T 223.11 Iron, Steel and Alloy - Determination of Chromium Content - Visual
Titration or Potentiometric Titration Method
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 223.17 Methods for Chemical Analysis of Iron, Steel and Alloy - The
Diantipyrylmethane Photometric Method for the Determination of Titanium Content
GB/T 223.18 Methods for Chemical Analysis of Iron, Steel and Alloy - The Sodium
Thiosulfate Separation Iodimetric 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 223.26 Iron, Steel and Alloy - Determination of Molybdenum Content - The
Thiocyanate Spectrophotometric Method
GB/T 223.40 Methods for Chemical Analysis of Iron, Steel and Alloy; the Anion-
Exchange Separation - Sulphochlorophenol S Photometric Method for the
Determination of Niobium Content
GB/T 223.43 Iron Steel and Alloy - Determination of Tungsten Content –
Gravimetric Method and 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 223.63 Methods for Chemical Analysis of Iron, Steel and Alloy - the
Sodium(Potassium) Periodate Photometric Method for the Determination of
Manganese Content
GB/T 223.68 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 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 228.2 Metallic Materials - Tensile Testing - Part 2. Method of Test at Elevated
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 241 Metal Materials Tubes - Hydrostatic Pressure Test
GB 713 Steel Plates for Boilers and Pressure Vessels
GB/T 2102 Acceptance, Packing, Marking and Quality Certification of Steel Pipe
GB/T 2650 Method of Impact Test on Welded Joints
GB/T 2651 Method of Tensile Test for Welded Joint
GB/T 2653 Method of Bend and Compression Test for Welded Joint
GB/T 2975 Steel and Steel Products - Location and Preparation of Test Pieces for
Mechanical Testing
GB/T 4336 Carbon and Low-Alloy Steel – Determination of Multi-Element
Contents – Spark Discharge Atomic Emission Spectrometric Method (Routine
Method)
GB/T 20066 Steel and Iron - Sampling and Preparation of Samples for the
Determination of Chemical Composition
GB/T 20123 Steel and Iron - Determination of Total Carbon and Sulfur Content
Infrared Absorption Method after Combustion in an Induction Furnace (Routine
Method)
GB/T 21835 Dimensions and Masses per Unit Length of Welded Steel Pipes
SY/T 6423.1 Petroleum and Natural Gas Industries - Non-Destructive Testing
(NDT) Methods of Steel Tubes - Part1. Radiographic Testing of Weld Seam of
Welded Steel Tubes for Detection of Imperfections
SY/T 6423.2 Petroleum and Natural Gas Industries - Non-Destructive Testing
(NDT) Methods of Steel Tubes - Part2. Automated Ultrasonic Testing of the Weld
Seam of Welded Steel Tubes for the Detection of Longitudinal and/or Transverse
Imperfections
SY/T 6423.4 Petroleum and Natural Gas Industries - Non-Destructive Testing(NDT)
Methods of Steel Tubes - Part4. Automated Ultrasonic Testing of Seamless and
Welded Steel Tubes for the Detection of Laminar Imperfections
SY/T 6423.5 Petroleum and Natural Gas Industries - Non-Destructive Testing
(NDT) Methods of Steel Tubes - Part 5. Digital Radiographic Testing of the Weld
Seam of Welded Steel Tubes for the Detection of Imperfections
3 Terms and Definitions
The following terms and definitions are applicable to this document.
3.1 Jointer
The steel pipe formed through the butt welding of multiple (two and above) steel pipes.
6 Technical Requirements
6.1 Steel grades and chemical compositions
The steel grades and chemical compositions (melting analysis and finished product
analysis) shall conform to the provisions of Table 3. According to the demand of the
purchaser, through the negotiation between purchaser and supplier, the steel pipe with
grade beyond the provisions of Table 3 can be supplied.
6.2 Manufacturing method
6.2.1 Raw materials
The raw materials used for manufacturing the steel pipe shall conform to the following
provisions.
a) The steel shall be smelted by the oxygen converter or electric furnace; and shall
be the fine-grained killed steel through the out-of-furnace melting;
b) The steel plate shall conform to the provisions of GB713, or the quality
requirements shall be no less than the provisions of GB 713;
c) Any lubricant, oil stain and the like contaminating the welding groove or
surrounding area shall be cleaned before welding.
6.2.2 Manufacturing processes
The steel pipe shall be manufactured by the longitudinal double submerged
arc welding (SAWL) method.
tempering temperature 700°C~750°C; normalizing
temperature 900°C~960°C; tempering temperature
700°C~750°C, but shall be sharp quenching after
normalizing
10 12Cr5Mo 650~760
1. Complete annealing or isothermal annealing;
2. Normalizing and tempering. normalizing temperature
930°C~980°C; tempering temperature 730°C~770°C.
6.4 Tensile properties
6.4.1 The tensile properties of steel pipe at room temperature shall conform to the
provisions of Table 5.
6.4.2 The steel pipe base metal tensile specimen shall be cut horizontally from the
position about 180° from the welding line.
6.4.3 The welded joint tensile specimen shall be cut from the steel pipe perpendicular
to the welding line; and the welding line shall be at the center of the specimen; the
weld reinforcement of specimen shall be eliminated, and its value shall be no less than
the lower limit of tensile strength specified in Table 5.
6.4.4 According to the demand of the purchaser, through the negotiation between
purchaser and supplier, and test temperature...
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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