Q/BQB 665-2019 English PDF (QBQB665-2019)

This Standard specifies the dimension, shape, weight, allowable deviations, technical requirements, inspections and tests, reinspection, package, marking and quality certificates of 08Ni3DR and 06Ni9DR steel plates for low-temperature pressure vessels.

Q/BQB 665-2019
ENTERPRISE STANDARD OF
BAOSHAN IRON AND STEEL CO., LTD
Replacing Q/BQB 665-2018
08Ni3DR and 06Ni9DR Steel Plates for Low
Temperature Pressure Vessels
ISSUED ON: JANUARY 30, 2019
IMPLEMENTED ON: FEBRUARY 20, 2019
Issued by: Baoshan Iron and Steel Co., Ltd.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Information Required for Ordering ... 5
4 Dimension, Shape, Weight and Allowable Deviation ... 5
5 Technical Requirements ... 6
6 Inspection and Test ... 9
7 Reinspection ... 10
8 Package, Markings and Quality Certificate ... 10
9 Numerical Rounding-off ... 10
08Ni3DR and 06Ni9DR Steel Plates for Low
Temperature Pressure Vessels
1 Scope
This Standard specifies the dimension, shape, weight, allowable deviations, technical requirements, inspections and tests, reinspection, package, marking and quality certificates of 08Ni3DR and 06Ni9DR steel plates for low-temperature pressure vessels.
This Standard is applicable to 08Ni3DR and 06Ni9DR steel plates for low-temperature pressure vessels produced by Baoshan Iron and Steel Co., Ltd., among which 08Ni3DR has a temperature range of -100°C~100°C and thickness range of
5mm~80mm; while 06Ni9DR has a temperature range of -196°C~100°C, and
thickness range of 5mm~40mm.
2 Normative References
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 222-2006 Permissible Tolerances for Chemical Composition of Steel
Products
GB/T 223 Methods for Chemical Analysis of Iron, Steel and Alloy (Applicable Parts) 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 232 Metallic Materials – Bend Test
GB/T 247 General Rule of Package, Mark and Certification for Steel Plates (Sheets) and Strips
GB/T 709-2006 Dimension, Shape, Weight and Tolerances for Hot-Rolled Steel Plates and Strips
GB/T 2975-2018 Steel and Steel Products - Location and Preparation of Samples and 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 8170 Rules of Rounding off for Numerical Values and Expression and
Judgement of Limiting Values
GB/T 17505 Steel and Steel Products – General Technical Delivery Requirements 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 20125 Low-Alloy Steel - Determination of Multi-Element Contents -
Inductively Coupled Plasma Atomic Emission Spectrometric Method
NB/T 47013.3-2015 Nondestructive Testing of Pressure Equipment - Part 3: Ultrasonic Testing
3 Information Required for Ordering
When ordering, the user needs to provide the following information, which is sufficient to explain the required materials:
a) Product standard number;
b) Designation;
c) Specifications and edge status;
d) Weight;
e) Others (such as special requirements, etc.).
4 Dimension, Shape, Weight and Allowable Deviation
4.1 The allowable deviation of the thickness of the steel plate is in accordance with the requirements of Class B in GB/T 709-2006. According to the requirements of the purchaser, after agreement between the supplier and the purchaser, the requirements of Class C in GB/T 709-2006 can also be met.
by the symbol "NT") after normalizing, where the tempering temperature is no lower than 600°C.
5.3.3 The 06Ni9DR steel plate is delivered in the state of quenching and tempering (indicated by the symbol "QT"). For steel plates with a thickness of 12mm or less, they shall be delivered in the state of normalizing + tempering (indicated by the symbol "NNT") for twice. The tempering temperature shall be no lower than 540°C. 5.3.4 According to the requirements, the supplier is allowed to perform reheat treatment. The number of quenching for reheat treatments is no more than 2 and the number of tempering is unlimited.
5.3.5 Generally, the edge state of the steel plate is delivered by shearing or flame cutting.
5.4 Mechanical and Process Properties
5.4.1 The mechanical and process properties of steel plates shall comply with the requirements of the corresponding Table 2.
5.4.2 Impact absorption energy is the average of the test results of a group of three specimens. The test results of one of the samples are allowed to be less than the specified value, but no less than 70% of the specified value.
5.4.3 For steel plates with a thickness of less than 12mm, Charpy impact tests shall use auxiliary specimens. For steel plates with a thickness of> 8mm ~ < 12mm, the size of the auxiliary specimen is 7.5mm × 10mm × 55mm, and the test results shall be no less than 75% of the values specified in Table 2. For steel plates with a thickness of 6mm~8mm, the size of the auxiliary specimen is 5mm × 10mm × 55mm, and the test results shall be no less than 50% of the values specified in Table 2. For steel plates with a thickness of 5mm ~ < 6mm, the size of the auxiliary specimen is 2.5mm × 10mm × 55mm, and the test results shall be no less than 25% of the values specified in Table 2.
5.4.4 After the bending test, there shall be no visible cracks on the outer surface of the specimen.