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GB/T 10476-2024: Specifications for urea high pressure condenser
Status: Valid GB/T 10476: Evolution and historical versions
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Specifications for urea high pressure condenser
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GB/T 10476-2024
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| GB/T 10476-2004 | English | 419 |
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Specifications for urea high pressure condenser
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PDF similar to GB/T 10476-2024
Basic data | Standard ID | GB/T 10476-2024 (GB/T10476-2024) | | Description (Translated English) | Specifications for urea high pressure condenser | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G93 | | Classification of International Standard | 71.120.30 | | Word Count Estimation | 34,326 | | Date of Issue | 2024-09-29 | | Date of Implementation | 2025-04-01 | | Older Standard (superseded by this standard) | GB/T 10476-2004 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 10476-2024: Specifications for urea high pressure condenser---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
National Standard of the People's Republic of China
ICS 71.120.30CCS G 93
Technical requirements for urea high pressure condenser
2024-09-29 Release
2025-04-01 Implementation
State Administration for Market Regulation
The National Standardization Administration issued
Replaces GB/T 10476-2004
Table of Contents
Preface Ⅲ
1 Scope...1
2 Normative references ...1
3 Terms and definitions 3
4 Symbols 3
5 Design...3
5.1 General Principles 3
5.2 Basic structure of condenser ...3
5.3 Main components...5
6 Materials...10
6.1 General requirements 10
6.2 Low alloy steel 10
6.3 Urea grade stainless steel...11
7 Manufacturing...13
7.1 General requirements 13
7.2 Material Retest 13
7.3 Bevel 13
7.4 Assembly 14
7.5 Welding 15
7.6 Heat Treatment 16
7.7 Test piece and specimen 16
7.8 Surface treatment 17
7.9 Nondestructive Testing 17
8 Inspection and testing 20
8.1 Dimensions 20
8.2 Form tolerance, position tolerance and runout 20
8.3 Surface roughness 20
8.4 Appearance Quality of Welded Joints 20
8.5 Assessment of Surface Sandblasting and Rust Removal and Cleaning Levels 20
8.6 Nondestructive Testing 20
8.7 Chemical composition 20
8.8 Mechanical properties 21
8.9 Average grain size of metals 21
8.10 Non-metallic inclusions in forgings 21
8.11 Ferrite content 21
8.12 Intergranular corrosion tendency test 21
8.13 Selective corrosion inspection and metallographic inspection 22
8.14 Hardness...22
8.15 Withstand voltage test 22
8.16 Leakage test 22
9 Factory Inspection 23
10 Accompanying documents, marking, transportation, packaging and storage 23
10.1 Accompanying Documents 23
10.2 Logo 23
10.3 Transportation, packaging and storage 24
Figure 1 Basic structure of urea high pressure condenser...4
Figure 2 Schematic diagram of the gas-liquid distributor structure...
Figure 3 Schematic diagram of the buffer structure for the inlet of methylammonium liquid...
Figure 4 Schematic diagram of the structure of the vortex breaker for the outlet of methylammonium liquid...8
Figure 5 Schematic diagram of support grid structure...9
Table 1 Qualified quality grades of forgings ultrasonic testing ...10
Table 2 Chemical composition of urea grade stainless steel materials (finished product analysis)...11
Table 3 Chemical composition of deposited metal of urea grade stainless steel welding material...11
Table 4 Mechanical properties of urea grade stainless steel materials...12
Table 5 Depth of selective corrosion...12
Table 6 Stress relief heat treatment temperature...16
Table 7 X-ray detection requirements 18
Table 8 Ultrasonic testing requirements 18
Table 9 Penetration test requirements 19
Table 10 Magnetic Particle Testing Requirements 19
Table 11 Number of samples taken for the intergranular corrosion tendency test of urea grade stainless steel materials...21
Table 12 Number of samples to be taken for retest of intergranular corrosion tendency test of urea grade stainless steel materials...22
Table 13 Marking of urea grade stainless steel materials...23
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting is required.
This document replaces GB/T 10476-2004 "Technical Specifications for Urea High-Pressure Condensers". Compared with GB/T 10476-2004, except for the structure
In addition to adjustments and editorial changes, the main technical changes are as follows.
a) The scope has been changed (see Chapter 1, Chapter 1 of the.2004 edition);
b) Deleted the terms and their definitions (see 3.1 to 3.5 of the.2004 edition);
c) Added symbols (see Chapter 4);
d) The basic structure of the condenser is added (see 5.2);
e) Added technical requirements for main components (see 5.3); changed the requirements for the maximum deviation of heat exchange tube dimensions (see 5.3.1.2,.2004
4.2.2.7 a) of the.2004 edition]; Changed the requirements for ultrasonic testing of heat exchange tubes [see 5.3.1.3, Table 8, 4.2.2.7 b) of the.2004 edition];
The requirements for the heat exchange tube pressure test have been changed [see 5.3.1.4, 4.2.2.7 c) of the.2004 edition];
f) The requirements for surface quality, dimensions and dimensional limit deviations of urea grade stainless steel plates have been modified (see 5.3.2.1,.2004 edition).
4.2.2.8.1); Changed the requirements for ultrasonic testing of tubes and bars (see 5.3.2.2, 4.2.2.8.2 of the.2004 edition);
g) The requirements for head manufacturing have been changed (see 5.3.3, 4.3.2 of the.2004 edition);
h) Added requirements for the surface quality of tube sheet cladding (see 5.3.4.1);
i) Added requirements for corrugated expansion joints (see 5.3.5.3);
j) Added requirements for gas-liquid distributors (see 5.3.6);
k) Added the requirements for buffers for the inlet of ammonium methylate (see 5.3.7); Added the requirements for vortex breakers for the outlet of ammonium methylate (see 5.3.8);
l) Added requirements for supporting grilles (see 5.3.9);
m) Added support requirements (see 5.3.10);
n) Added requirements for nozzle flanges (see 5.3.11);
o) Added requirements for manholes (see 5.3.12);
p) Changed the requirements for the qualified quality grade of the head steel plate ultrasonic testing and the requirements for the grain size grade of the head plate (see 6.2.1,.2004
4.2.1.1 of the.2016 edition); added the requirements for the Charpy pendulum impact test temperature and the impact absorption energy KV2 of the head steel plate
Requirements for sampling of head steel plate specimens (see 6.2.1);
q) Deleted the applicable standards for the grades of forgings used to manufacture tube sheets, tube box shells, bottom covers, top covers, and upper and lower flanges (see.2004 edition
4.2.1.2), added the requirements for the Charpy pendulum impact test temperature and the impact absorption energy KV2 of the impact test for forgings (see
6.2.2); Added the requirements for the quality level of ultrasonic testing of forgings (see 6.2.2, Table 1), and deleted the separate ultrasonic testing of tube sheets
The requirements of the.2004 edition (see 4.2.1.2) are integrated into Table 1 (see Table 1, Table 1 of the.2004 edition);
r) Added requirements for non-metallic inclusions in forgings and requirements for sampling locations (see 6.2.2);
s) The requirements for tensile strength of low alloy steel welded joints at room temperature have been deleted (see 4.2.1.3 of the.2004 edition);
t) Changed the urea grade stainless steel material grades (see 6.3.1, Table 2, Table 3, Table 4, 6.3.5.2, Table 5, Table 6, Table 11, Table 12,.2004
4.2.2.1, Table 1, Table 2, Table 3, 4.2.2.5, Table 4, Table 5, Table 7, Table 8 of the.2016 edition);
u) Added requirements for urea-grade stainless steel smelting method and supply status (see 6.3.1);
v) Changed the requirements for Cr, Mo, S, and N in the chemical composition of urea grade 022Cr17Ni12Mo2 stainless steel, and changed the requirements for urea grade
The requirements for Mn and S in the chemical composition of 022Cr25Ni22Mo2N stainless steel have been increased, and the requirements for the content of element B in the chemical composition have been increased.
(See Table 2, Table 1 of the.2004 edition);
w) Changed the requirements for chemical composition of deposited metal of urea grade stainless steel welding consumables (see Table 3, Table 3 of the.2004 edition); Changed the requirements for chemical composition of urea grade stainless steel welding consumables (see Table 3, Table 3 of the.2004 edition);
Requirements for mechanical properties of grade stainless steel materials (see Table 4, Table 2 of the.2004 edition);
x) Added the requirement for elongation of deposited metal at 20°C for urea grade stainless steel welding materials (see 6.3.3.2);
y) Changed the requirements for ferrite content of urea grade stainless steel materials (see 6.3.4.2, 4.2.2.4 of the.2004 edition); Changed the requirements for urea grade
Requirements for intergranular corrosion tendency test of stainless steel materials (see 6.3.5, 4.2.2.5 of the.2004 edition); Changes to urea grade stainless steel
Requirements for selective corrosion inspection and metallographic inspection of materials (see 6.3.6, Table 5, 4.2.2.6, Table 5 of the.2004 edition);
z) Added requirements for weld joint classification, weld overlay thickness and lining plate thickness (see 7.1.5 and 7.1.6);
aa) The requirements for material retest have been changed (see 7.2, 4.2.3 of the.2004 edition);
bb) Changed the requirements for magnetic particle testing of low alloy steel grooves (see 7.3.1, 4.3.1.1 of the.2004 edition), and changed the requirements for urea grade stainless steel parts
Requirements for weld groove penetration testing (see 7.3.2, 4.3.1.2.1 of the.2004 edition);
cc) The requirements for the operation and inspection procedures for the connection between heat exchange tubes and tube sheets have been changed (see 7.4.2, 4.3.5.2 of the.2004 edition);
dd) Added requirements for tube bundle assembly (see 7.4.3);
ee) Changed the requirements for lining assembly (see 7.4.4, 4.3.5.3 of the.2004 edition);
ff) The requirements for welders have been deleted (see 4.3.6.1 of the.2004 edition), and the requirements for welding procedure qualification and welding procedure specification have been changed.
(See 7.5.1, 7.5.2, 4.3.6.2, 4.3.6.3 of the.2004 edition);
gg) Added requirements for welding consumables covering the end faces of urea grade stainless steel pipes exposed to corrosive media during welding operations (see
7.5.3.4);
hh) Added the requirements for argon purity for argon arc welding of urea-grade stainless steel (see 7.5.3.5);
ii) The requirement that the product should be approved by the technical director of the manufacturing unit before repair is deleted (see 4.3.6.5 of the.2004 edition);
jj) The requirements for the appearance quality of welded joints have been changed (see 7.5.5, 4.3.6 and 5.1 of the.2004 edition);
kk) The hardness requirements of low alloy steel welded joints after heat treatment have been changed (see 7.6.9, 4.2.1.3, 4.3.7, 5.4 of the.2004 edition);
ll) The requirements for product welding test pieces have been changed (see 7.7.1.2, 4.3.8.1.2 of the.2004 edition), and the requirements for test piece inspection and evaluation have been added.
Request (see 7.7.1.3);
mm) The requirements for heat treated specimens and test pieces of parent metal have been changed (see 7.7.2, 4.3.8.2 of the.2004 edition), and the requirements for specimen and test piece inspection have been added.
Requirements for testing and assessment (see 7.7.2.3);
nn) The requirement that the finished surface be coated with medical vaseline has been deleted (see 5.6.4 of the.2004 edition);
oo) The requirements for non-destructive testing have been changed (see Table 7, Table 8, Table 9, Table 10, Table 9, Table 10, Table 11, Table 12 of the.2004 edition);
pp) The requirements for dimensional inspection have been changed (see 8.1, 5.5 of the.2004 edition);
qq) Added the inspection methods for shape tolerance, position tolerance and runout (see 8.2);
rr) Added the test method for surface roughness (see 8.3);
ss) Added the inspection method for the appearance quality of welded joints (see 8.4);
tt) Added the assessment method for the level of surface blasting and rust removal (see 8.5);
uu) Added non-destructive testing methods (see 8.6);
vv) Added test methods for chemical composition analysis (see 8.7);
ww) Added test methods for mechanical properties (see 8.8);
xx) Added the test method for average grain size of metal (see 8.9);
yy) Added the detection and assessment methods for non-metallic inclusion content (see 8.10);
zz) The test method for ferrite content has been changed (see 8.11, 5.3 of the.2004 edition);
aaa) Added the test method for intergranular corrosion tendency (see 8.12);
bbb) Added selective corrosion and metallographic inspection methods (see 8.13);
ccc) The hardness test requirements have been changed (see 8.14, 5.4 of the.2004 edition);
ddd) The requirements for the withstand voltage test have been changed (see 8.15, 5.7 of the.2004 edition);
eee) The test methods for bubble leakage and ammonia/helium leakage have been changed (see 8.16.1, 8.16.2, 5.8 of the.2004 edition);
fff) Added the requirements for factory inspection (Chapter 9);
ggg) Changed the requirements for accompanying documents (see 10.1, Chapter 7 of the.2004 edition);
hhh) Changed the requirements for manufacturer identification of material model when the thickness of urea grade stainless steel plate is greater than or equal to 5 mm (see
10.2.1.1, Table 13, 4.2.2.9, Table 6 of the.2004 edition), added the standards for materials other than urea grade stainless steel.
Requirements for marking of welded joints of non-urea grade stainless steel (see 10.2.1.3, 10.2.2.2);
iii) Added requirements for product nameplate (see 10.2.3);
jjj) The protection requirements for the tube side and shell side during transportation and storage have been changed (see 10.3.2, 6.2 of the.2004 edition).
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document was proposed by the China Petroleum and Chemical Industry Federation.
This document is under the jurisdiction of the National Technical Committee for Standardization of Chemical Machinery and Equipment (SAC/TC 429).
This document was drafted by. Dalian Jinzhong Machinery Group Co., Ltd., China Wuhuan Engineering Co., Ltd., Ningbo Special Equipment Inspection and Research
Institute, East China University of Science and Technology, Sichuan University, Shaanxi Special Equipment Inspection and Testing Institute, Tianhua Chemical Machinery and Automation Research and Design Institute
Limited company.
The main drafters of this document are. Du Jizhe, Cai Hongguang, Yang Xiaolin, Yuan Ding, Niu Yaping, Lv Sheng, Ma Liang, Jiang Xia, Jin Ziheng, Zhang Xiaoming,
Xu Caifu, Mao Guojun, Zhang Wenyong, Li Yuhu, Liu Jing, Lei Pengli.
This document was first published in 1989, revised for the first time in.2004, and this is the second revision.
Technical requirements for urea high pressure condenser
1 Scope
This document specifies the design, materials, manufacturing, inspection and testing, factory inspection, accompanying documents,
Labeling, transportation, packaging and storage.
This document is applicable to shell side design pressure not exceeding 1.26 MPa, tube side design pressure not exceeding 16.2 MPa, and design temperature not exceeding
200℃Urea-grade corrosion-resistant ultra-low carbon chromium-nickel-molybdenum (Cr⁃Ni⁃Mo) austenitic stainless steel (hereinafter referred to as "urea-grade stainless steel") lining,
Urea high-pressure condenser with cladding structure (hereinafter referred to as "condenser").
2 Normative references
The contents of the following documents constitute the essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to
This document.
GB/T 150 (all parts) Pressure vessels
GB/T 151-2014 Heat exchanger
GB/T 223.5 Determination of acid-soluble silicon and total silicon content of iron and steel - Reduced molybdenum silico-silicic acid spectrophotometric method
GB/T 223.11 Determination of chromium content in steel and alloys Visual titration or potentiometric titration method
GB/T 223.12 Methods for chemical analysis of iron, steel and alloys - Sodium carbonate separation - Diphenylcarbazide photometric method for determination of chromium content
GB/T 223.23 Determination of nickel content in steel and alloys - Dimethylglyoxime spectrophotometric method
GB/T 223.25 Methods for chemical analysis of iron, steel and alloys - Dimethylglyoxime gravimetric method for the determination of nickel content
GB/T 223.26 Determination of molybdenum content in steel and alloys - Thiocyanate spectrophotometric method
GB/T 223.28 Chemical analysis methods for iron, steel and alloys - α-benzoin oxime gravimetric method for determination of molybdenum content
GB/T 223.36 Chemical analysis methods for iron, steel and alloys - Separation by distillation - Neutralization titration method for determination of nitrogen content
GB/T 223.37 Determination of nitrogen content in iron, steel and alloys - Spectrophotometric method using indophenol blue distillation separation
GB/T 223.59 Determination of phosphorus content in iron, steel and alloys - Bismuth phosphomolybdenum blue spectrophotometric method and antimony phosphomolybdenum blue spectrophotometric method
GB/T 223.60 Determination of silicon content in steel and alloys by gravimetric method
GB/T 223.61 Methods for chemical analysis of iron, steel and alloys - Ammonium phosphomolybdate volumetric method for the determination of phosphorus content
GB/T 223.62 Methods for chemical analysis of iron, steel and alloys - Determination of phosphorus content by butyl acetate extraction photometric method
GB/T 223.63 Determination of manganese content in steel and alloys - Sodium (potassium) periodate spectrophotometric method
GB/T 223.64 Determination of manganese content in steel and alloys - Flame atomic absorption spectrometry
GB/T 223.67 Determination of sulfur content in steel and alloys - Methylene blue spectrophotometric method
GB/T 223.68 Methods for chemical analysis of iron, steel and alloys - Determination of sulfur content by potassium iodate titration after combustion in a tubular furnace
GB/T 223.69 Determination of carbon content in steel and alloys - Gas volumetric method after combustion in a tube furnace
GB/T 223.72 Determination of sulfur content of steel and alloys by gravimetric method
GB/T 223.75 Determination of boron content in steel and alloys - Methanol distillation - Curcumin photometric method
GB/T 223.78 Chemical analysis methods for iron, steel and alloys - Curcumin direct photometric method for determination of boron content
GB/T 223.85 Determination of sulfur content in iron, steel and alloys - Infrared absorption method after combustion in an induction furnace
GB/T 223.86 Determination of total carbon content of steel and alloys - Infrared absorption method after combustion in an induction furnace
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