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GB/T 12552-2023: Maximal safety depths for commercial diving
Status: Valid GB/T 12552: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 12552-2023 | English | 149 |
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Maximal safety depths for commercial diving
| Valid |
GB/T 12552-2023
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| GB/T 12552-1990 | English | 159 |
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Maximal safety depths for commercial diving
| Obsolete |
GB/T 12552-1990
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Standard similar to GB/T 12552-2023 GB 20827 GB 18985 Basic data | Standard ID | GB/T 12552-2023 (GB/T12552-2023) | | Description (Translated English) | Maximal safety depths for commercial diving | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | R53 | | Classification of International Standard | 03.220.40; 13.100 | | Word Count Estimation | 7,745 | | Date of Issue | 2023-11-27 | | Date of Implementation | 2024-06-01 | | Older Standard (superseded by this standard) | GB/T 12552-1990 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 12552-2023: Maximal safety depths for commercial 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.
ICS 03:220:40;13:100
CCSR53
National Standards of People's Republic of China
Replace GB/T 12552-1990
Maximum safe depth for industrial diving
Published on 2023-11-27
2024-06-01 Implementation
State Administration for Market Regulation
Released by the National Standardization Administration Committee
Table of contents
PrefaceⅠ
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 air diving 1
5 Mixed Gas Diving 2
6 Saturation Diving 2
Reference 3
Foreword
This document complies with the provisions of GB/T 1:1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents"
Drafting:
This document replaces GB/T 12552-1990 "Maximum Safe Depth for Industrial Diving": Compared with GB/T 12552-1990, except for structural adjustments
In addition to general and editorial changes, the main technical changes are as follows:
a) The terms "nitrox saturation diving", "helium saturation diving", "tour diving" and "jet recirculation helium oxygen heavy diving equipment diving" have been deleted:
Terms and definitions (see 2:4, 2:5, 2:6, and 2:7 of the:1990 edition);
b) Added the term and definition of “open diving bell” (see 3:4);
c) Delete the content related to breathing oxygen during diving (see 3:1 of the:1990 edition);
d) Changed the maximum safe depth requirements for self-contained air diving (see 4:1, 3:2:2 of the:1990 edition);
e) The maximum safe depth requirements for surface supplied air diving have been changed (see 4:2, 3:2:1 of the:1990 edition);
f) Added the maximum safe depth requirements for surface-supplied air diving using diving cages or open diving bells (see 4:3);
g) Delete the maximum limit for nitrox diving, air circuit diving during helium saturation diving, and diving using jet regenerative helium heavy diving equipment:
Safety depth requirements (see 3:3:1, 3:3:3 and 3:4:1 of the:1990 edition);
h) Added the maximum safe depth requirements for mixed gas diving (see Chapter 5);
i) Changed the maximum safe depth requirements for helium-oxygen saturation diving (see 6:3, 3:4:2 of the:1990 edition);
j) Relevant content on basic requirements for diving gear and equipment configuration has been deleted (see Chapter 4 of the:1990 edition):
This document is proposed and administered by the Ministry of Transport of the People's Republic of China:
This document was drafted by: Shanghai Jiao Tong University Marine and Underwater Engineering Science Research Institute Co:, Ltd:, Shanghai Salvage Bureau of the Ministry of Transport, People's Republic of China
PLA Naval Medical University, Guangzhou Diving School:
The main drafters of this document: Xue Liqun, Huang Xin, Sun Jian, Zhang Guoguang, Xiao Xiaoling, Chen Ruiyong, Li Zhili, Chen Shuikai, He Xiuxia:
This document was first published in:1990 and this is the first revision:
Maximum safe depth for industrial diving
1 Scope
This document specifies the requirements for the maximum safe depth for air diving and mixed gas diving, as well as the maximum saturation depth for saturation diving:
This document is applicable to industrial diving operations:
2 Normative reference documents
The contents of the following documents constitute essential provisions of this document through normative references in the text: Among them, the dated quotations
For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to
this document:
GB 26123 Air diving safety requirements
GB 28396 Safety requirements for mixed gas diving
3 Terms and definitions
The following terms and definitions as defined in GB 26123 and GB 28396 apply to this document:
3:1
industrial divingcommercialdiving
commercial diving
Diving operations that directly serve the national economy:
Note: Excludes military, emergency rescue, public safety, leisure, sports, technology, scientific research and other diving:
3:2
saturationdiving saturationdiving
A diving method in which a diver is continuously exposed to a certain depth or pressure, and the tissues of the body are saturated with inert gas, and then decompressed and released into the water:
[Source: JT/T 1452-2022, 3:3:6, with modifications]
3:3
diving cage divingcage;divingbasket
A frame-type cage-shaped vehicle that transports divers to and from the surface and underwater working locations:
[Source: JT/T 1452-2022,3:2:20]
3:4
open diving bellopenbel
wet diving bell wetbel
A carrier equipment that transports divers to and from the surface and underwater working sites: The upper end has a compressed gas environment, and the divers can
The part above the shoulders is placed in it, and the remaining part is exposed to the water:
[Source: JT/T 1452-2022, 3:2:13, with modifications]
4 air diving
4:1 The maximum safe depth for self-contained air diving should be 30m:
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