GB 26123-2010The safety requirement for air diving (English PDF)

3.2 Acronyms The following abbreviations apply to this standard. BIBS

--- Built-contained breathing apparatus (built-inbreathingsystem) CCS

--- China Classification Society (Chinaclassificationsociety) DP

--- Dynamic Positioning (dynamicpositioning) JSA

--- Job Safety Analysis (jobsafetyanalysis) PTW

--- Work Permit (permittowork) ROV

--- ROV (remotelyoperatedvehicle) SCUBA

--- self-contained underwater breathing apparatus (self-containedunderwaterbreathingapparatus)

4 personnel requirements

The standard refers to divers, including divers, diving supervision, diving care staff, prepare divers, diving radio operator, life support members And diving physician, with its training requirements, certification, and management should comply with the relevant requirements of the competent authorities. Engaged in underwater operations or need to go to high gas Physical condition pressure environment personnel shall comply with the requirements of GB 20827.

5.1 Individual harness

5.1.1 This standard is referred to harness individual diving mask or helmet, wetsuit, safety harness individual divers wear directly or wear, Ballast with emergency gas cylinders, flippers, diving knives and buoyancy vest.

5.1.2 Individual various components of the harness should have an identification number, maintenance procedures and records.

5.1.3 surface supplied air diving mask shall meet the following requirements.

a) air supply meet the requirements of GB 18985;

b) Two-way voice communication device;

c) supply line is equipped with a check valve, the valve spring to withstand pressure less than 20kPa;

d) the use of corrosion-resistant materials;

e) over-voltage protection devices;

f) can be connected to the emergency gas cylinders;

g) easy detachment;

h) visual inspection once a year by the manufacturer authorized personnel, maintenance and performance testing.

5.1.4 water supply diving helmet should meet the requirements of 5.1.3, helmet safety device to prevent accidental disengagement from the neck brace.

5.1.5 Ventilation diving helmet should comply with

5.1.3 a) ~

h) of the requirements, quick exhaust valve.

5.1.6 wetsuit material should be suitable for the environment, it has sufficient strength and harmless to human health.

5.1.7 dry suit should meet the requirements of 5.1.6, manual air supply, exhaust and overvoltage exhaust, heat preservation function, can prevent diving The outside world harmful substances harm by members.

5.1.8 Hot water wetsuit should meet the requirements of

5.1.6 to provide adequate hot water and can withstand operating water temperature 44 °C, have measured for divers Test the water temperature of the bypass means to make hot water pumped through the bypass means is admitted or discharged hot water service.

5.1.9 safety harness shall comply with the following requirements.

a) according to the relevant requirements of GB 6095 design and manufacturing;

b) manufacturing materials can carry divers and individuals loaded with a load;

c) between the safety harness and the umbilical cord with a quick release buckle;

d) to prevent the strap from slipping divers;

e) junction with mask or helmet does not produce excessive traction;

f) When lifting diver, divers breathe without prejudice;

g) has two crotch strap;

h) have lifting divers "D" ring;

5.3 Gas Supply System

5.3.1 The standard refers to the gas supply system includes an air compressor, cylinders, filters, oil-water separators, high-pressure gas cylinders and gas transportation Pipes and valves and the like.

5.3.2 The various components of the gas supply system should have an identification number, maintenance procedures and records.

5.3.3 air compressors shall meet the following requirements.

a) GB/T 12930 basic requirements;

b) meet the diving depth and working time gas pressure and flow;

c) hose to meet the requirements of 5.2.1;

d) high-pressure pipeline to meet the requirements of 5.3.6;

e) tank meets the requirements of 5.3.4;

f) power control system meets the requirements of 5.9;

g) is not pumping or mixing gas and oxygen delivery; Before

h) use, maintenance and performance testing after maintenance and modification.

5.3.4 tank shall meet the following requirements.

a) according to the relevant requirements of 150 GB of design and construction, installation on ships or offshore installations, but also with reference to CCS "diving systems and Submersibles into the Classification and Construction, "the relevant provisions;

b) at the inlet check valve can be manually controlled or alternative gas backflow valve;

5.4 Deck decompression chamber

5.4.1 should be consistent with GB/T 16560 requirements, and when mounted on ships or offshore installations, but also with reference to CCS "diving systems and diving Is the Construction and norms "the relevant provisions.

5.4.2 should be able to carry more than 0.5MPa working pressure.

5.4.3 outside the cabin should be two-way communication system, a communication system and emergency call devices.

5.4.4 pipes and cables out of the pods should be consistent cabin parts.

5.4.5 pipeline should be out of the pods and outside the cut-off valve.

5.4.6 internally pressurized cabin air intake silencer should be installed under reduced pressure vent should be installed anti suction guard.

5.4.7 Life cabin should be installed to display tank pressure gauge.

5.4.8 All valves, instrumentation, piping should identify its function.

5.4.9 All instrumentation shall comply with the relevant requirements of 5.10. It should be a cabin (including the observation window) damage and corrosion visual inspection and pressure test

5.4.10 maximum working pressure of each year.

5.4.11 pods should TSGR7001 or reference to CCS "diving systems and submersibles into the Classification and Construction," Carry out regular inspections, safety According to GB/T 12243 test once a year.

5.4.12 proper identification number, maintenance procedures and records. Diving

5.5 Control Panel

5.5.1 connection between the breathing gas source and divers, diving control panel is used to control diving operations shall include at least the suction valve, exhaust valve, Regulator, air pressure gauge, gas gauge, measuring deeply and communication devices.

5.5.2 for the gas pipeline should have at least two divers used independently.

5.5.3 should be respectively connected to the main gas source and emergency air interface.

5.5.4 should have more than two air pressure gauge.

5.5.5 divers should measure gas pressure gauges and deep. Due to internal pressure relief vent pipe on the gas pipeline 5.5.6. Gas sampling ports should be analyzed on a gas pipeline 5.5.7.

5.5.8 shall be identified valves, piping and instrumentation functions.

5.5.9 proper identification number, maintenance procedures and records.

5.6 Into the water system

5.6.1 The standard refers to the water system should include diving ladder, diving and open-cage diving bell.

5.6.2 proper identification number, maintenance procedures and records.

5.6.3 dive ladder shall meet the following requirements.

a) be able to withstand the weight and the weight of the harness two divers;

b) manufactured from corrosion resistant materials or by the anti-corrosion treatment;

c) the length to meet the lower end can be placed below the water surface is not less than 1m, above the upper end of the dive station ground (or deck) is not less than 1m;

d) there is support for divers armrest.

5.6.4 diving cage shall meet the following requirements.

a) there is enough internal space, can accommodate two divers and harness;

b) can withstand the weight and the weight of the harness, and the weight of two divers work related tools;

c) manufactured from corrosion resistant materials or by the anti-corrosion treatment;

d) from the top rings (holes) and alternate lifting points;

e) The safety chain and internal handrails;

f) loss of consciousness diver fixed means;

5.7 Dipping system

5.7.1 should refer to CCS "diving systems and submersibles into the Classification and Construction," the relevant requirements of the design, construction, installation and testing.

5.7.2 dipping diving cage or open diving bell hanging into the water discharge system shall include at least the mast or boom, crane or winches, slings and bottom Seat, and a power source.

5.7.3 should be automatic backup brake and mechanical brake type brakes; when equipped with a clutch, should prevent clutch disengagement of automatic protection Means.

5.7.4 Lifting cage diving or diving bell anti-twist rope should be able to carry eight times the maximum working load lifting, sampling once a year break Off test.

5.7.5 sling diving cage lifting points should be used with a nut and cotter pin nut. When used as part of

5.7.6 Diving bell umbilical recovery system, due to run umbilical termination device; transmission angle...