GB/T 35012-2018 English PDF (GBT35012-2018)

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GB/T 35012-2018: Chromium molybdenum alloy steel plate for hydrogen service equipment
GB/T 35012-2018
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.50
H 46
Chromium molybdenum alloy steel plate
for hydrogen service equipment
ISSUED ON. MAY 14, 2018
IMPLEMENTED ON. FEBRUARY 1, 2019
Issued by. State Administration for Market Regulation;
Standardization Administration of the PRC.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Ordering content ... 7
4 Designation representation ... 7
5 Dimensions, shape, weight ... 8
6 Technical requirements ... 8
7 Test methods ... 13
8 Inspection rules ... 15
9 Packaging, marking, and quality certificate ... 15
Appendix A (Informative) Definition of heat treatment ... 16
Appendix B (Normative) Step cooling test ... 18
Appendix C (Normative) Special requirements ... 20
Chromium molybdenum alloy steel plate
for hydrogen service equipment
1 Scope
This Standard specifies the ordering content, designation representation,
dimensions, shape, weight and tolerances, technical requirements, test
methods, inspection rules, packaging, marking, and quality certificate, etc. of
chromium molybdenum alloy steel plate for hydrogen service equipment.
This Standard is applicable to the manufacture of chromium molybdenum alloy
steel plate (hereinafter known as steel plate for short) with a thickness of 6 mm
~ 200 mm for hydrogen service equipment of petrochemical and coal chemical
industry.
2 Normative references
The following documents are indispensable for the application of this document.
For the dated references, only the versions with the dates indicated are
applicable to this document. For the undated references, the latest version
(including all the amendments) are applicable to this document.
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 223.14 Methods for chemical analysis of iron, steel and alloy - The N-
benzoyl-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 223.31 Iron, steel and alloy - Determination of arsenic content -
Distillation-molybdenum blue spectrophotometric method
GB/T 223.37 Methods for chemical analysis of iron, steel and alloy - The
indophenol blue photometric methods for the determination of nitrogen
content after distillation separation
GB/T 223.40 Iron, Steel and Alloy - Determination of Niobium Content by the
Sulphochlorophenol S Spectrophotometric Method
GB/T 223.47 Methods for chemical analysis of iron, steel and alloy - The
carrier precipitation-molybdenum blue photometric method for the
determination of antimony content
GB/T 223.50 Methods for chemical analysis of iron, steel and alloy - The
phenylfuorone-CTMAB direct photometric method for the determination of tin
content
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 223.62 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 223.67 Iron, Steel and Alloy - Determination of Sulfur Content -
Methylene Blue Spectrophotometric Method
GB/T 223.69 Iron, Steel and Alloy - Determination of Carbon Contents - Gas-
volumetric Method after Combustion in the Pipe Furnace
GB/T 223.75 Iron, steel and alloy - Determination of boron content - Methanol
distillation-curcumin photometric method
GB/T 223.76 Methods for chemical analysis iron, steel and alloy - The flame
atomic absorption spectrometric method for the determination of vanadium
content
GB/T 223.77 Methods for chemical analysis of iron, steel and alloy - The
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 20124 Steel and iron - Determination of nitrogen content - Thermal
conductimetric method after fusion in a current of inert gas
NB/T 47013.3-2015 Nondestructive testing of pressure equipment - Part 3.
Ultrasonic testing
3 Ordering content
Contracts or orders for ordering in accordance with this Standard shall include
the following.
a) Standard number;
b) Designation;
c) Dimensions;
d) Delivery state;
e) Weight;
f) Impact test temperature of 14Cr1MoR(H);
g) Specific holding temperature of 15CrMoR(H), 14Cr1MoR(H) in Table 8;
h) The heating rate, cooling rate, and holding time in Table 8;
i) Whether 12Cr2Mo1R(H), 12Cr2Mo1VR(H) are subjected to a step cooling
test;
j) Sampling quantity and inspection location for Brinell hardness in Table 9;
k) Special requirements.
4 Designation representation
6.6 Nondestructive testing
The steel plate shall be subjected to ultrasonic testing one by one and shall
comply with the Class I requirements of NB/T 47013.3-2015.
6.7 Surface quality
6.7.1 There shall be no defects which affect the use such as cracks, bubbles,
scarring, folding, and inclusions on the surface of steel plate. The steel plate
shall not have visible delamination. If there are the above surface defects,
cleaning is allowed. The cleaning depth is calculated from the actual dimension
of steel plate and shall not exceed half the thickness tolerance of the steel plate;
and the minimum thickness of the steel plate shall be ensured. The defect
cleaning area shall be smooth and free of edges and corners.
6.7.2 Other defects are allowed. The depth is calculated from the actual
dimension of steel plate and shall not exceed half the allowable tolerance of the
thickness. It shall ensure that the thickness of steel plate at the defect is not
less than the minimum allowable thickness of the steel plate.
6.7.3 Steel plates are not allowed to be welding-repaired.
6.8 Step cooling test
According to the requirements of the purchaser and stated in the contract,
12Cr2Mo1R(H) and 12Cr2Mo1VR(H) shall be subjected to step cooling test in
accordance with Appendix B. SEE Appendix A for the definition of step cooling
heat treatment.
6.9 Special requirements
According to the requirements of the purchaser, negotiated between the
supplier and the purchaser and indicated in the contract, the corresponding
special requirements shall be selected according to Appendix C.
7 Test methods
7.1 The test method for chemical...