GB/T 22724-2022 English PDF (GBT22724-2022)

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GB/T 22724-2022: Installation and equipment for liquefied natural gas -- Design of onshore installations
GB/T 22724-2022
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 75.060
CCS E 24
Replacing GB/T 22724-2008
Installation and equipment for liquefied natural gas - Design
of onshore installations
ISSUED ON: MARCH 09, 2022
IMPLEMENTED ON: OCTOBER 01, 2022
Issued by: State Administration for Market Regulation.
Standardization Administration of PRC.
Table of Contents
Foreword ... 6
1 Scope ... 9
2 Normative references ... 9
3 Terms and definitions ... 13
4 Safety and environment ... 16
4.1 General requirements ... 16
4.2 Environmental impact ... 16
4.3 Security ... 18
4.4 Hazard assessment ... 20
4.5 Safety design ... 27
5 Liquefaction device ... 30
5.1 Composition ... 30
5.2 Natural gas purification ... 30
5.3 Natural gas liquefaction ... 31
5.4 Storage ... 31
6 Storage system ... 32
6.1 General requirements ... 32
6.2 Tank types ... 32
6.3 Design principles ... 32
6.4 General design principles ... 35
6.5 Foundations ... 36
6.6 Field instruments ... 36
6.7 Pressure and vacuum protection ... 38
6.8 Impounding area ... 41
6.9 Safety facilities ... 42
6.10 Tank piping ... 43
6.11 Tank spacing ... 44
6.12 Test run and outage ... 44
6.13 Test ... 44
7 Liquefied natural gas pump ... 44
7.1 General requirements ... 44
7.2 Materials ... 45
7.3 Specific requirements ... 45
7.4 Inspection and test ... 45
8 Gasification of liquefied natural gas ... 46
8.1 General requirements ... 46
8.2 Design conditions ... 48
8.3 Vaporizer ... 49
9 Piping layout ... 55
9.1 Piping system ... 55
9.2 Design principles ... 57
9.3 Piping check, inspection, test ... 57
9.4 Pipe components ... 58
9.5 Valves ... 61
9.6 Safety valves ... 62
9.7 Pipe galleries and pipe strips ... 62
9.8 Thermal insulation ... 63
10 Receiving and exporting natural gas ... 66
10.1 Metering ... 66
10.2 Gas quality ... 66
10.3 Odorizing... 67
11 Recovery and treatment of evaporative gas ... 67
11.1 General requirements ... 67
11.2 Recycling ... 67
11.3 Collection ... 68
11.4 Return flow ... 68
11.5 Compressor ... 69
11.6 Recondensation ... 69
11.7 Re-liquefaction ... 69
11.8 Flaring and venting ... 69
12 Wharf facilities ... 71
12.1 Site selection ... 71
12.2 Engineering design ... 71
12.3 Safety ... 72
13 Electrical and building ... 72
13.1 Electrical equipment ... 72
13.2 Lightning protection and anti-static ... 72
13.3 Buildings ... 73
14 Hazard management ... 73
14.1 Intrinsic safety ... 73
14.2 Passive protection ... 76
14.3 Security ... 77
14.4 Detection and alarm ... 77
14.5 Active protection ... 77
15 Automatic control and communication ... 77
15.1 General requirements ... 77
15.2 Process control system ... 78
15.3 Safety instrumented systems ... 79
15.4 Fire and gas detection systems ... 81
15.5 Wharf facility monitoring and control ... 81
15.6 Communication ... 82
16 Construction, commissioning, maintenance ... 83
16.1 Environment, production safety, occupational health and quality ... 83
16.2 Acceptance test ... 83
16.3 Preparations before starting and shutdown ... 83
17 Anticorrosion ... 84
17.1 Anticorrosion layer ... 84
17.2 Cathodic protection ... 85
18 Training ... 85
19 Maritime training ... 85
Appendix A (Normative) Radiant heat limits ... 86
A.1 Radiant heat of LNG fire ... 86
A.2 Radiant heat from flares and venting tubes ... 87
Appendix B (Normative) Seismic classification ... 89
B.1 Principles ... 89
B.2 SSE seismic categories ... 90
B.3 Basic security measures after SSE occurs ... 91
Appendix C (Informative) Schematic diagram of different types of LNG storage tanks
... 92
C.1 Overview ... 92
C.2 Spherical storage tank ... 95
C.3 Low-temperature concrete storage tank ... 96
Appendix D (Normative) Reference flow ... 98
D.1 Gas emissions VT caused by heat input ... 98
D.2 Gas emissions VL caused by liquid filling ... 98
D.3 Gas emissions V0 caused by overfilling ... 98
D.4 Gas emissions VF caused by flash evaporation during filling process ... 98
D.5 Gas emissions VR caused by circulating LNG with a submersible pump ... 100
D.6 Gas emissions VA caused by changes in atmospheric pressure ... 100
D.7 Gas emissions VV caused by control valve failure ... 101
D.8 Gas emissions VI caused by heat input during fire ... 101
D.9 Gas supplement volume VD caused by liquid phase pump extraction ... 101
D.10 Gas supplement amount VC caused by compressor extraction ... 101
D.11 Gas emissions VB caused by rollover ... 102
Appendix E (Normative) Additional requirements for LNG pumps ... 103
E.1 Design ... 103
E.2 Inspection... 103
E.3 Test ... 105
E.4 Nominal value ... 107
E.5 Nameplate ... 107
E.6 Submersible pump and cables ... 108
E.7 Vertical submersible pump ... 109
Appendix F (Normative) Pipeline design ... 110
Appendix G (Normative) Odor ... 112
G.1 Odorants ... 112
G.2 Odorization system ... 112
G.3 Odorant treatment ... 113
G.4 Odorant filling ... 114
G.5 Odorant leakage ... 114
G.6 Personal protection ... 114
References ... 115
Installation and equipment for liquefied natural gas - Design
of onshore installations
1 Scope
This document specifies the technical requirements for the design, construction,
operation, maintenance of onshore fixed facilities for natural gas liquefaction plants
(LNG plants), LNG receiving stations, onshore gasification parts of floating storage
facilities, LNG storage and distribution stations, LNG peak shaving stations, ship LNG
bunkering stations.
This document applies to the newly built, expanded, renovated LNG stations mentioned
above.
2 Normative references
The contents of the following documents constitute essential provisions of this
document through normative references in the text. Among them, for dated reference
documents, only the version corresponding to the date applies to this document; for
undated reference documents, the latest version (including all amendments) applies to
this document.
GB/T 150 (all parts) Pressure vessels
GB/T 3215 Centrifugal pumps for petroleum, petrochemical and natural gas
industries
GB/T 3216 Rotodynamic pumps - Hydraulic performance acceptance tests - Grades
1, 2 and 3
GB/T 3836.1 Explosive atmospheres - Part 1: Equipment - General requirements
GB/T 8423.3 Petroleum and natural gas industries terminology - Part 3: Oil-gas
surface engineering
GB/T 9445 Non-destructive testing - Qualification and certification of NDT
personnel
GB 12348 Emission standard for industrial enterprises noise at boundary
GB 12523 Emission standard of environment noise for boundary of construction site
natural gas and vaporize it into normal temperature gas.
4 Safety and environment
4.1 General requirements
4.1.1 The safety design of the LNG station shall be controlled by a feasible safety and
environmental protection management system; the impact of the station on safety and
environment shall be evaluated, according to the requirements of this chapter.
4.1.2 The personal risk and social risk benchmarks of LNG stations shall comply with
the provisions of GB 36894.
4.2 Environmental impact
4.2.1 Environmental impact assessment
4.2.1.1 During the feasibility study stage of the project, a preliminary environmental
impact analysis shall be conducted...