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GB 28396-2012: The safety requirement for mixed gas diving
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The safety requirement for mixed gas diving
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GB 28396-2012
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Basic data | Standard ID | GB 28396-2012 (GB28396-2012) | | Description (Translated English) | The safety requirement for mixed gas diving | | Sector / Industry | National Standard | | Classification of Chinese Standard | R09 | | Classification of International Standard | 03.220.40; 13.100 | | Word Count Estimation | 11,181 | | Quoted Standard | GB 4844.2; GB 8982; GB 20827; GB 26123-2010 | | Regulation (derived from) | National Standards Bulletin No. 13 of 2012 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This Chinese standard specifies the helium -oxygen mixture as a respiratory medium surface supplied mixed gas diving right personnel, equipment and systems, and operating procedures. This standard applies to diving depth of 120 m with a shallow Heliox div | GB 28396-2012: The safety requirement for mixed gas diving---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.
The safety requirement for mixed gas diving
ICS 03.220.40; 13.100
R09
National Standards of People's Republic of China
Mixed gas diving safety requirements
Published 2012-06-29
2013-05-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China issued
Table of Contents
Preface Ⅰ
1 Scope 1
2 Normative References 1
3 terms, definitions and abbreviations 1
4 personnel requirements 2
5 device 2 and system requirements
6 operating procedures in claim 4
Foreword
All technical contents of this standard is mandatory.
This standard was drafted in accordance with rules GB/T 1.1-2009 given.
This standard reference Association of Diving Contractors International "business diving and underwater accepted standards" (fifth edition, 2004) and the International Maritime contractors
Association "international practice for offshore diving" (1998), "the water supplied-air mixed gas diving operations" (2005) and "The Diving equipment and systems checks
Guide. the water supplied-air mixed gas diving systems "(2006), and the US Department of Labor Occupational Safety and Health Administration" Occupational Safety and Health Standards "
(1996) and "Maritime Occupational Safety and Health Standards" (1989) of the US Department of Homeland Security Coast Guard to develop relevant content.
The standard proposed by the People's Republic of China Ministry of Transport.
This standard and underwater engineering Standardization Technical Committee by the Ministry of Transport salvage.
Drafted by. Ministry of Transport Shanghai Salvage Bureau, Shenzhen City Industrial Co., Ltd. Ye Shan.
The main drafters. Zhang Hui, leaves like Qiu, Xiao Xiaoling, Pan Mingguang, Liu Muliang, Xu Jin, Guo Xiaoping, Zhang Lei, Li Song, Liu Yuan.
Mixed gas diving safety requirements
1 Scope
This standard specifies to Heliox medium supplied air respiratory gas mixing diving personnel, equipment and systems, and work processes
Required sequence.
This standard applies to a shallow diving depth of 120m Heliox diving, it is also applicable to exposure to less than 1.2MPa heliox
Analog dive.
2 Normative references
The following documents for the application of this document is essential. For dated references, only applies to the version dated paper
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB 4844.2 pure helium
GB 8982 breathing oxygen for medical and aerospace
GB 20827 professional diver medical examination requirements
GB 26123-2010 Safety requirements for air diving
3 terms, definitions and abbreviations
3.1 Terms and Definitions
GB 26123 determined following terms and definitions apply to this document.
3.1.1.
Heliox diving helioxdiving
Use of heliox as a man made diving breathing gas, does not include helium-oxygen saturation diving.
3.1.2.
Closed diving bell closedbel
A shipping diver carrying the device serving between the surface and underwater sites, which can be closed bell body, and with the deck decompression chamber
Docking.
3.1.3
Helium Voice heliumspeech
Abnormal breathing during speech containing helium gas mixture. Wherein the voice fundamental frequency and the resonance frequency increases, timbre changes, was nasal, intelligibility
reduce.
3.2 Abbreviations
The following abbreviations are applicable to this document.
BIBS --- built-contained breathing apparatus (built-inbreathingsystem)
JSA --- Job Safety Analysis (jobsafetyanalysis)
PTW --- Work Permit (permittowork)
4 personnel requirements
Heliox divers, including divers, diving supervision, diving care staff, prepare diver, diving radio operator, life-support staff, latent
Water diving medical technician and the physician, with its training, qualification and management should comply with the relevant requirements of the competent authorities. Or to be engaged in underwater operations into
The high pressure environment of the physical conditions of personnel should meet the requirements of GB 20827.
5 device and system requirements
5.1 Personal harness
GB 26123-2010 5.1.1 should be consistent with the relevant requirements of 5.1.1 - 5.1.11.
5.1.2 Emergency filling gas cylinders shall Heliox.
5.2 umbilical cord and hose
GB 26123-2010 5.2.1 should be consistent with the relevant requirements of 5.2.
5.2.2 should meet the requirements of the transport heliox.
5.2.3 transporting oxygen concentration of 25% or more of heliox should be treated with an oxygen hose predetermined.
5.3 supply system
5.3.1 shall comply with the relevant requirements of GB 26123-2010 in 5.3.
5.3.2 shall comply with the following requirements.
a) The gas distribution conditions, a special apparatus is provided with oxygen filling pumps, compressors and other film;
b) storage vessels and pipelines dedicated;
c) the conveying pipe is provided with special identifier;
d) storing and transporting more than 25% oxygen concentration Heliox containers and pipes according to a predetermined treatment with oxygen;
e) pumping the heliox film can not pump air compressor;
f) pumping oxygen pneumatic booster pump should be used exclusively.
5.4 deck decompression chamber
5.4.1 shall comply with the relevant requirements of GB 26123-2010 5.4.
5.4.2 Maximum operating pressure should not be less than the maximum diving depth of pressure.
5.4.3 diver should have treatment gas supply pipes heliox and connected to the cabin BIBS.
5.4.4 should be equipped with a helium voice aligner.
5.4.5 When the need butt and diving bell should be equipped with a docking ring channel and connection card.
Dive Control Panel 5.5
5.5.1 should be consistent with GB 26123-2010 relevant requirements of 5.5.
5.5.2 are connected to the mixture gas should have primary air, air supply and air interfaces emergency air supply.
5.5.3 shall be provided with online oxygen analyzer.
5.6 into the water system
5.6.1 present system into effluent standards referred diving cage, open and closed diving bell diving bell.
5.6.2 diving cage GB 26123-2010 should meet the requirements of 5.6.2 and 5.6.4, should have more than two heliox should
Emergency gas cylinders, which can meet the volume requirements of the divers stay 30min maximum diving depth. It should also be equipped with one or more emergency air cylinders.
5.6.3 open diving bell should meet the relevant requirements GB 26123-2010 5.6.2 and 5.6.5, should have two or more Heliox
Emergency gas cylinders, which can meet the volume requirements of the divers stay 30min maximum diving depth. It should also be equipped with an emergency air above gas
bottle. With promising diver supply and ventilation in the upper bell Heliox and air supply valve.
5.6.4 closed diving bell in addition to meeting the requirements of GB 26123-2010 in 5.6.2, it must also meet the following requirements.
a) GB 26123-2010 in 5.6.4a) ~ 5.6.4f) and 5.6.5c) ~ 5.6.5g) requirements.
Outside b) shall be equipped with a bell.
1) two or more cylinders Heliox emergency, the volume to be able to meet the maximum diving depth of the diver in the residence 30min
Seeking, but also with more than one emergency air cylinder;
2) through the valve member, sealing surfaces, cylinders and other emergency protective devices;
3) two or more viewing windows, the observation window of the guard, as viewed from the outboard cabin, no blind spots exist;
4) with the decompression chamber and a passage connecting the docking collar;
5) All piping through the cutoff valve chamber member;
6) The frequency of a beacon 37.5kHz;
7) equipped with ballast release device, which can prevent accidental release;
8) bracket.
Within c) it shall be equipped with a bell.
1), outside the test deep;
2) for reading the diver's tank pressure gauge emergency;
3) wired and emergency two-way communication system associated with diving control room;
4) heating means;
5) carbon dioxide and oxygen analyzer test tube;
6) a carbon dioxide removal device;
7) gas supply systems, ventilation when diving bell, does not affect the diver's breathing gas flow;
8) each diver from a separate water or gas supply by means diving bell emergency breathing gas cylinder source of breathing gas phase can
Mutual switching;
9) Metabolic oxygen compensating means to ensure that the amount of oxygen to 24h;
10) aid kit;
11) Toolbox;
12) emergency procedures and emergency manual percussion Code;
13) cut through all the pipes of the valve member.
d) Other requirements with.
1) The electrical system shall comply with the requirements of 5.9 GB 26123-2010, electrical penetrating piece can withstand more than twice the bidirectional dive
Bell design pressure;
2) it should be equipped with diving console diving bell member roadmap piping and valves.
5.7 dipping system
5.7.1 should be consistent with GB 26123-2010 relevant requirements of 5.7.
5.7.2 closed diving bell dipping system should meet the following requirements.
a) with a diving bell guide winch, comprising a winch, and guide rigging ballast;
b) lifting mast with pulleys and power cord diving bell locking hook;
c) When the diving bell docking with the level of the deck decompression chamber, with the assistance docking rail.
5.8 Communication System
5.8.1 shall comply with the relevant requirements of GB 26123-2010 in 5.8.
5.8.2 dive diver supervision and communication between the diver preparation should be consistent with the helium voice correction requirements.
5.9 Electrical System
Shall comply with the relevant requirements of GB 26123-2010 in 5.9.
Equipment and instrumentation 5.10
Shall comply with the relevant requirements of GB 26123-2010 in 5.10.
6 operating procedures required
With 6.1 scene files
Shall comply with the relevant requirements of GB 26123-2010 in 6.1.
6.2 Emergency rescue and first aid
Shall comply with the relevant requirements of GB 26123-2010 in 6.2.
6.3 formulate plans and contingency plans
Shall comply with the relevant requirements of GB 26123-2010 in 6.3.
6.4 Risk assessment and JSA
Shall comply with the relevant requirements of GB 26123-2010 in 6.4.
With 6.5 persons
6.5.1 should be at least eight people, including a diving supervision, a diver, underwater care of a member/diver prepare, prepare a water dive
Members, two members of the care, support staff and a life member of a diving electromechanical.
6.5.2 When the daily dives more than once, should be a corresponding increase in staffing.
6.6 Personal protective equipment equipped
Shall comply with the relevant requirements of GB 26123-2010 in 6.6.
6.7 with a harness, devices and systems
6.7.1 6.7.3 In GB should meet the minimum diving apparatus equipped with an air 26123-2010 claim, wherein the dry diving suits should be served hot or
Water service.
6.7.2 should be equipped with two or more separate primary air mixed gas, a mixed gas of more emergency air source, two helium voice corrector, two hot water
Clothes, a water heater.
6.7.3 underwater assigned as care staff, a diver should increase personal harness.
6.7.4 should be equipped with a submersible cage or diving bell open or closed diving bell, dipping and the corresponding system.
6.7.5 decompression chamber should be equipped with a deck, and air pressure and for the treatment, oxygen and heliox.
6.8 Preparation and analysis of breathing gas
6.8.1 preparation of mixed gas through the apparatus should be degreased.
6.8.2 helium gas mixture used in the formulation should meet the purity requirements GB 4844.2 first-class product, oxygen should meet the purity 8982 of GB
Claim.
6.8.3 diving mixed gas oxygen concentration should be determined according to the diving depth, the oxygen partial pressure should be controlled at 140kPa ~ 160kPa.
6.8.4 diving cage, the oxygen concentration of the diving bell open or closed emergency cylinder gas mixture diving bell should meet the requirements of 6.8.3; divers
Individuals carrying emergency oxygen concentration mixture gas cylinders shall be determined according to the maximum diving depth, when the oxygen partial pressure should be controlled not less than the water environment
16kPa, 250kPa not higher than the maximum diving depth.
Treated with heliox 6.8.5 should be equipped with an oxygen concentration of at least 20% and 50% of the two.
6.8.6 should be formulated in a mixed gas oxygen concentration analysis, and the analysis should be sampled again after standing 24h, should be re-analyzed before each use.
6.9 with breathing gas
6.9.1 main air divers and emergency air supply should be two independent gas sources in mixture.
6.9.2 preliminary underwater diver the main gas source and emergency air supply should be two separate air mixed gas, the main gas divers wherein the gas source may be an emergency
Source instead.
6.9.3 Surface preparation of diver should be independent of the main air and underwater divers divers preliminary supply system.
Requirements 6.9.4 should also comply with GB 26123-2010 in 6.8.3 - 6.8.6.
Site inspection and test harness 6.10, devices and systems
6.10.1 should be performed in compliance with the relevant requirements 26123-2010 Appendix A of GB .
6.10.2 should also meet the following.
a) the cylinder filling emergency oxygen concentration Heliox 6.8.3 meets the requirements;
b) 8 ℃ ~ 15 ℃ temperature when the dry clothes, when the temperature is less than 8 ℃ hot water service;
High-pressure pipes and hoses c) conveying the gas supply system of an oxygen concentration of more than 25% by Heliox predetermined treated with oxygen;
d) maximum working pressure of the decompression chamber and the maximum diving depth is consistent with the treatment gas supply conduit supplying divers with a helium-oxygen gas mixture,
And connected to the cabin BIBS, unobstructed gas, helium with a voice aligner, call clear;
e) divers diving control panel with promising preliminary divers feed gas mixture and the main gas source and emergency air interface, gas and air mixture
Gas pipelines can effectively distinguish, smooth supply;
f) The Diving Bell closed one check in accordance with the requirements of 5.6.4, check the structure for deformation, damage, leaks and test its functionality is
No normal;
g) closed diving bell dipping one check system according to the requirements of 5.7, check the structure for deformation, damage, leaks, test
Its function is normal.
6.11-site communication is established
Shall comply with the relevant requirements of GB 26123-2010 in 6.10.
6.12 into the water and water way
6.12.1 should use the diving cage, open or closed diving bell diving bell as in, water way.
6.12.2 shall comply with the requirements in 6.11.3 of GB 26123-2010.
6.12.3 diving depth exceeds 90m, use closed diving bell. No closed diving bell, when special circumstances demand diving should be evaluated
Site-specific conditions, to take more effective security measures to ensure the diver before diving under the premise of safety.
Recording 6.13 Dive reporting requirements
Shall refer to GB 26123-2010 associated with Appendix B of the recording.
6.14 Audit work with PTW
Shall comply with the relevant requirements of GB 26123-2010 in 6.13.
Layout tasks and communication 6.15
Shall comply with the relevant requirements of GB 26123-2010 in 6.14.
6.16 prepare divers
6.16.1 shall comply with the relevant requirements of GB 26123-2010 in 6.15.
6.16.2 When ready standby diver in the diving cage or diving bell, the water should also be provided with a preliminary diver.
6.17 spot warning signs
Shall comply with the relevant requirements of GB 26123-2010 in 6.16.
6.18 should not be diving and diving termination conditions
Shall comply with the relevant requirements of GB 26123-2010 in 6.17.
6.19 maximum diving depth
It should be less than 120m.
6.20 divers umbilical cord length
6.20.1 The unwritten divers from the diving bell umbilical cord length should not exceed 30m.
Length 6.20.2 diving bell care staff within the umbilical cord should be longer than the divers umbilical cord 2m ~ 3m.
6.21 repetitive dive
It should not be repeated dives.
6.22 diving hydrological and meteorological conditions
6.22.1 flow rate should be less than 0.5m/s. Flow rate exceeds the above limitations, due to special circumstances when diving, now should be assessed
Field specific conditions, to take more effective security measures to ensure diver safety.
6.22.2 Beaufort scale should be less than 5 (Day 17 to 21 knots, wave height 1.8m). Beaufort scale level greater than 5 less than
Level 6 (sections 22 to 27 knots wind speed, wave height 3.0m), the site-specific conditions should be evaluated to decide whether to dive.
6.23 Gas Conversion
6.23.1 diving depth is less than 80m, the air can be directly converted Heliox in the water.
6.23.2 When diving depth greater than 80m, the air should be converted with heliox between 20m ~ 60m.
When 6.23.3 reduced pressure, the conversion by the air Heliox speed should be slow.
6.23.4 complete gas conversion should appear and disappear helium speech marked.
6.24 decompression program selection
6.24.1 should be based on the diving depth, underwater work time, work in conjunction with diving strength, water quality, and individual differences hydrometeorological divers
Variety of factors decompression program.
6.24.2 decompression after diving program should be recognized physician adoption.
After the diving schedule 6.25
6.25.1 shall comply with 6.22.1 ~ 6.22.3 and 6.22.5 - 6.22.7 of GB 26123-2010 in.
After 6.25.2 diver underwater diving decompression or decompression spacewalk water, it should be not less than 2h stay near the deck decompression chamber, and not within 5h
Away from the decompression chamber.
6.26 minimum hours of rest
Shall comply with the relevant requirements of GB 26123-2010 in 6.23.
6.27 diving accident reports, surveys, statistics and treatment
Shall comply with the relevant requirements of GB 26123-2010 in 6.24.
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