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GB 31117-2014: [GB/T 31117-2014] Safety specification for marine auxiliary boiler
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[GB/T 31117-2014] Safety specification for marine auxiliary boiler
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GB 31117-2014
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Basic data | Standard ID | GB 31117-2014 (GB31117-2014) | | Description (Translated English) | [GB/T 31117-2014] Safety specification for marine auxiliary boiler | | Sector / Industry | National Standard | | Classification of Chinese Standard | U41 | | Classification of International Standard | 47.020.20 | | Word Count Estimation | 9,923 | | Date of Issue | 9/3/2014 | | Date of Implementation | 7/1/2015 | | Quoted Standard | GB/T 11037; GB/T 11038; GB/T 14649; GB/T 14650; GB/T 24947; CB 3111; CB/T 3161; CB/T 3347; CB/T 3348; CB/T 3596; CB/T 3597; CB/T 3920; CB/T 3921; CB/T 3922; CB/T 3923; CB/T 3924; CB/T 3967; CB/T 4105; CB/T 4222; CB/T 3752 | | Regulation (derived from) | People's Republic of China Announcement of Newly Approved National Standards No. 21 of 2014 | | 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 Standard specifies the security state of the art marine auxiliary boiler requirements, safety requirements and safety inspection technology management requirements. This Standard is applicable to medium is water and saturated steam boilers. | GB 31117-2014: [GB/T 31117-2014] Safety specification for marine auxiliary boiler---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.
Safety specification for marine auxiliary boiler
ICS 47.020.20
U41
National Standards of People's Republic of China
Safety requirements for marine auxiliary boiler
Issued on. 2014-09-03
2015-07-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
All the technical contents of this standard is mandatory.
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
The standard proposed by China State Shipbuilding Corporation.
This standard by the National Marine Machinery Standardization Technical Committee (SAC/TC137) centralized.
This standard was drafted. Qingdao Marine Boiler Works Limited, China Technology and Economy Research Institute of Shipbuilding Industry, China Classification Society Qingdao
Branch, ocean water pump factory in Yancheng City in Jiangsu, Qingdao Kay boilers Equipment Co.
The main drafters of this standard. Qiu Yudong, Weihua Xing, Liu Yanling, pipe Yuling, car sharp, single group, Bo.
Safety requirements for marine auxiliary boiler
1 Scope
This standard specifies the marine auxiliary boiler (hereinafter referred to as "boiler") state of the art security requirements, security management requirements and technical safety inspection
Claim.
This standard applies to the media as water and saturated steam boiler.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 11037 marine boiler and pressure vessel strength and tightness test methods
GB/T 11038 marine auxiliary boiler and pressure vessel pressure parts for welding
GB/T 14649 marine auxiliary boiler performance test method
GB/T 14650 General technical conditions for marine auxiliary boiler
GB/T 24947 marine auxiliary boiler water quality requirements
CB3111 marine auxiliary boiler inching valve
CB/T 3161 marine auxiliary boiler control box technical conditions
CB/T 3347 marine auxiliary boiler paint, insulation, packaging and technical conditions
CB/T 3348 Marine shell type auxiliary boiler assembly technical conditions
CB/T 3596 marine auxiliary boiler Membrane Water
CB/T 3597 marine auxiliary boiler header
CB/T 3752 Marine mechanical pressure burner
CB/T 3920 marine auxiliary boiler pipe thread
CB/T 3921 marine auxiliary boiler Manhole means
CB/T 3922 marine auxiliary boiler pressure parts fabrication main technical conditions
CB/T 3923 marine auxiliary boiler hand hole means
CB/T 3924 marine boiler the raw material inspection
CB/T 3967 marine steam atomizing burner
CB/T 4105 marine auxiliary boiler pin tube
CB/T 4222 Marine rotary cup burner
3 Safety Requirements state
3.1 Boiler design
3.1.1 boiler designed to meet the classification rules and GB/T 14650 requirements.
3.1.2 Calculation of the strength of the boiler should be carried out to Classification requirements specification.
3.1.3 ships steam boiler water level should meet the following minimum requirements.
a) higher than the lowest level of the highest water tube boiler heating surface 100mm, barrel decline steam tube as a heating surface;
b) the lowest level of horizontal smoke tube boilers above the top of the combustion chamber or pipe tobacco not less than 75mm, the return of many of the smoke tube boilers can be adapted
When reduced;
c) higher than the minimum water level modular boilers hot water pipes is not less than 50mm;
d) vertical vertical smoke tube boiler lowest water level of not less than 1/2 the height of pipe tobacco;
e) when the ship heels 4 °, the lowest level still meet the above requirements.
3.1.4 boiler water level control, pressure control, temperature control and combustion control shall comply with the classification rules and GB/T 14650 requirements of.
You should set the necessary means manholes and hand holes on the boiler 3.1.5.
3.1.6 Boiler base should be designed to accommodate thermal expansion of the boiler.
3.1.7 should be set on the boiler is suitable for lifting and fixing lugs.
The outer surface of the boiler 3.1.8 shall be CB/T 3347 requirements of adiabatic packed that the outer wall of the boiler temperature is generally not continuous operation
Exceed 60 ℃.
3.1.9 Boilers should be able to meet the performance requirements specified in the relevant product standard under the following conditions of the ship tilted.
a) Horizontal. heeling 15 °, roll 22.5 °;
b) longitudinal. trim 5 °, pitching 7.5 °.
3.2 Boiler raw materials
3.2.1 boiler pressure parts materials and welding materials shall comply with the appropriate material standards and classification societies norms, and has a complete quality assurance
certificate.
3.2.2 boiler pressure parts materials and welding materials factory inspection shall comply with CB/T Requirements 3924's.
3.2.3 Replacement of boiler pressure parts materials should meet the strength and structural requirements, the technical department approval, and reported the Society for approval.
3.2.4 The use of new materials before trial boiler pressure parts, boiler manufacturers respond to new materials welding procedure qualification, and report to the Society
Approval.
3.2.5 boiler manufacturer should establish material storage and use of management system. Boiler pressure parts shall be marked with the material. For compression yuan
Former member of the steel plate cutting, grafting should be marked and easy to identify.
3.2.6 For the welding material for the boiler, the boiler manufacturer shall establish storage, drying, distribution and recovery management system.
3.3 boiler fabrication and welding
3.3.1 Manufacturing boiler pressure components shall comply with CB/T 3922 requirements.
3.3.2 pin tube boiler manufacturer shall comply with CB/T 4105 requirements.
3.3.3 Boiler threaded pipe manufacturer shall comply with CB/T 3920 requirements.
3.3.4 Membrane Water boiler manufacturer shall comply with CB/T Requirements of 3596.
3.3.5 Boiler header manufacturer shall comply with CB/T Requirements of 3597.
Manufacturing 3.3.6 Manhole devices should meet CB/T 3921 requirements.
Manufacturing 3.3.7 Boiler hand hole apparatus shall comply with CB/T 3923 requirements.
Welding and heat treatment 3.3.8 boiler pressure components shall comply with GB/T 11038 requirements.
3.3.9 boiler assembly shall comply with CB/T 3348 requirements.
3.3.10 boiler paint, insulation and packaging should comply with CB/T Requirements of 3347.
When 3.3.11 boiler pressure parts welding, manufacturers should develop welding procedures and welding procedure qualification, by the Society approved rear
It can be used for production.
3.3.12 welder welding boiler pressure components, should obtain the appropriate classification society welder certificate, and only served to their respective category certificate
Welding work.
Near the weld 3.3.13 boiler pressure parts shall be marked with low stress welder code symbol.
Ammeter, voltmeter, gas flowmeter 3.3.14 welding equipment and other instruments should be regularly calibrated. When the meter malfunction, should not be
welding.
3.3.15 When welding environment any of the following circumstances, the absence of effective protection measures should not be welding.
a) When manual welding wind speed greater than 10m/s, when the wind speed is greater than GMAW 2m/s;
b) relative humidity greater than 90%;
c) Rain, snow, outdoor work.
3.3.16 boiler manufacturing process, when the weldment temperature is below 0 ℃, if no preheating measures should not be welded.
3.3.17 boiler pressure parts welding repair should be ready to repair record, credited the quality certificate; in addition to local defect repair welds available manual welding
Supplement, the whole weld repair, should the original seam welding; weld repair frequency should generally not exceed the same place twice.
3.3.18 After the boiler pressure parts weld heat treatment generally should be the overall heat treatment. Ruoyin conditions, the overall heat treatment can not be
Allow segmented heat treatment, but it should ensure that the weld full length are subject to heat treatment, the longitudinal seam heat treatment overlapped portion of at least 1500mm, outside the furnace section
Measures should be reduced adiabatic temperature gradient.
3.4 Boiler Inspection and testing
3.4.1 All welds boiler pressure parts shall be visual inspection, surface quality should be consistent with the design drawings and GB/T 11038 related
Claim.
3.4.2 boiler pressure parts of the welds shall be non-destructive testing. Detection methods, the detection rate and location should be consistent with the design drawings and GB/T 11038
The relevant requirements.
3.4.3 NDT personnel should obtain classification society recognized qualifications.
3.4.4 boiler pressure parts welding shall GB/T 11038 requirements for the production of welded plates and mechanical properties of the test specimen.
Hydraulic strength test, the test method shall be 1.5 times the design pressure of the boiler boiler assembly 3.4.5 of GB/T 11037 in the provisions.
Hydraulic tightness test, the test method 3.4.6 Boiler Accessories After the installation shall be 1.25 times the design pressure of the boiler according to GB/T 11037 of
Provisions.
3.4.7 When the strength and tightness test boiler surroundings should be clean and tidy, the ambient temperature should generally be not less than 5 ℃.
3.4.8 boiler strength and tightness test medium temperature should be maintained above the dew point temperature of the ambient air, but should not be higher than 70 ℃. Low
Carbon steel specimen test medium temperature should not be less than 5 ℃; steel specimens, testing temperature of the medium should be higher than the steel brittle transition
temperature.
3.4.9 boiler unit should be GB/T 14649 of the performance test.
Security and alarm test 3.4.10 boiler should comply with the relevant provisions of CB/T 3161's.
3.4.11 When the boiler unit performance test, ancillary equipment and accessories shall be subject to inspection.
3.4.12 When the boiler unit performance test, test equipment used in the measurement of the instrument should be qualified within the validity period.
3.5 Boiler Accessories
3.5.1 Safety Valve
3.5.1.1 on boiler safety valve should be equipped with at least two, for the design pressure of not more than 0.78MPa, evaporation does not exceed 1t/h boiler
It may only be equipped with a safety valve (hereinafter referred to as "small boiler") on.
3.5.1.2 boiler safety valve opening pressure should be greater than the working pressure of the boiler, but it should be less than the design pressure of the boiler.
3.5.1.3 passage area valve connected to the boiler, the exhaust should not be less than the total area of the valve. Pipe exhaust valve passage area of
Inching valve exhaust valve should be not less than 1.1 times the total area for the safety valve shall be not less than the total area of the exhaust valve
2 times.
3.5.1.4 safety valve should be manually opening device.
3.5.1.5 inching valve shall comply with the requirements of CB3111.
3.5.1.6 boiler safety valve should be mounted vertically, and mounted at the highest position possible boiler, the safety valve between the boiler and the body should not be located
Set other valves.
3.5.1.7 smoke tube boiler at full steam valve is closed and the furnace combustion, boiler pressure after the valve can open up within 15min
The highest value to the boiler should not exceed 1.1 times the design pressure; water boiler in the circumstances described above, the pressure in the boiler safety valve opens after
The highest value that can be achieved within 7min should not exceed 1.1 times the design pressure of the boiler.
3.5.2 Pressure gauges and controllers
3.5.2.1 Each boiler should generally be set two surface diameter of not less than 100mm, accuracy class not less than 2.5 gauge, and should be safe
Mounted in front of the boiler is easy to see location.
3.5.2.2 Setting the number of the pressure controller should match the boiler load control and alarm requirements phase.
3.5.2.3 pressure gauge range should be 1.5 times the working pressure of the boiler to 2.0 times.
3.5.2.4 pressure controller for the boiler working pressure range should be 1.0 times to 2.0 times.
3.5.2.5 gauges indicated by the red line boiler operating pressure.
3.5.2.6 before gauge installation should check and verify proper interface.
3.5.3 Level meter and level controller
3.5.3.1 Each boiler should be set two flat glass water gauge. It should be clearly marked on the pump start and stop the water table, water level and low water level
mark.
3.5.3.2 water table can be set directly on the boiler or disposed on an inner diameter of not less than 50mm column, the column with the connecting pipe and boiler
Communication; connecting pipe should be as short as possible, the structure should have sufficient rigidity; steam connection portion connecting tube should be no accumulation of steam condensate water dips
Or at the elbow.
3.5.3.3 When the water level controller with a connection pipe connected to the boiler, shut-off valve should be set on the boiler.
3.5.3.4 water table should be provided with purging means.
Control and alarm point 3.5.3.5 Water Level Controller water level should correspond appearances.
3.5.4 Burner
3.5.4.1 mechanical pressure burners should comply with CB/T 3752 requirements.
3.5.4.2 steam atomizing burner shall comply with CB/T Requirements of 3967.
3.5.4.3 rotary cup burner shall comply with CB/T 4222 requirements.
3.5.5 Control Box
Shall comply with the control box CB/T 3161 requirements.
3.5.6 feed valve
It should be installed on two separate valve 3.5.6.1 to each boiler; small boiler can be equipped with a set.
3.5.6.2 to the valve and check valve composed by the shut-off valve. Shut-off valve should be installed directly on the boiler, check valve and shut-off valve should be possible
Neighbor.
3.5.7 steam valve
Steam valve should be set directly on the boiler. When two or more common boiler steam pipe, the steam valve should be used Ended
Return valve.
3.5.8 drain valve
3.5.8.1 Each boiler should be set up under the drain valve, the drain valve according to need. Blowdown valve diameter shall be not less than 25mm, but it should not
To 40mm.
Waste Hopper 3.5.8.2 on the boiler should be installed above the lowest water level in the 25mm to 25mm range below the normal water level of. funnel
The number and location should be able to make all of the evaporation surface dirt removed.
4 Safety management requirements
4.1 security identity
4.1.1 The boiler should be obvious position fitted with a fixed metal plate in front of the stove, the nameplate should generally be marked with the following.
a) name and model;
b) Design pressure, megapascals (MPa);
c) working pressure, MPa (MPa);
d) test pressure megapascals (MPa);
e) Rated evaporation, tons per hour (t/h);
f) dry weight, kilograms (kg);
g) Product Code;
h) the date of manufacture;
i) inspection mark and serial number;
j) the manufacturer's name.
4.1.2 Boiler main valves should be labeled with the name and the opening direction of the metal plate, the setting value of the flag should be on the instrumentation.
4.2 Packaging, transport and storage
4.2.1 Packaging
Boiler package should comply with the relevant provisions of CB/T 3347's.
4.2.2 Transport
Boiler transport should be tightly and prevent violent vibration dumping and fall.
4.2.3 Storage
Boiler should be stored at a relative humidity less than 80%, non-corrosive gases indoors.
4.3 Installation and Test
4.3.1 boiler installation should meet the design requirements, and in accordance with the manufacturer's installation instructions for use.
4.3.2 base installation, you should ensure the necessary margin expansion.
4.3.3 When the boiler arrangement, fuel boiler shell distance from the bulkhead should be not less than 450mm.
Before 4.3.4 Manhole should leave at least 500mm ~ 600mm worktop space before hand hole should allow at least 300mm of air operations
Between the front burner at least 700mm should be left for maneuver.
4.3.5 boiler chimney arrangement should reduce the bend, bend radius elbows should be not less than 2 times the diameter of the pipe.
4.3.6 Boiler dashboard arranged separately, should be arranged in the vicinity of the boiler position easily observed, and should have adequate lighting.
4.3.7 Boiler control box should be arranged in the vicinity of the location of the boiler easy maintenance operations.
Mooring and sea trials shall be carried out in accordance with the testing program approved by the Society after 4.3.8 boiler installation.
4.4 safe operation
4.4.1 Boiler management and operations staff should have knowledge of the safety of the boiler, the required job.
4.4.2 boiler operation, the operator shall implement the regime concerning the boilers running, good running duty records and shift recording.
4.4.3 Manual ignition boiler safety procedures should be implemented and should ensure that the scavenging time and ignition timing control.
4.4.4 boiler operation, experience one of the following circumstances, should immediately shutdown.
a) the minimum water level below the water table visible edge;
B) When the boiler water level dropped, increasing the water supply, but the water level continued to decline;
c) the boiler water level exceeds the highest visible level, the drain can not see the water level;
d) to pump all the water system failure or malfunction can not be effective to the boiler feed water;
e) pressure gauges, pressure controller, water level gauge or valve failure;
f) combustion device failure affect safety protection;
g) oil concentration and salinity exceeds a predetermined value;
h) pressure components leaking furnace coke serious, serious smoke tube fouling, over-temperature heating surface of metal but can not return to normal, and other threatening
Safe operation of boiler anomaly or malfunction.
4.4.5 When the boiler water level below the water table minimum visual edge, not to the boiler feed water immediately after shutdown.
4.4.6 boiler water table during use should be washed at least once daily. Water table rinse should be carried out in the boiler low pressure.
4.4.7 boiler should be performed during the sewage system. Sewage should be at low loads, and should monitor the water level.
4.4.8 boiler use should be pulled manually open the valve means monthly once exhaust, manual pull valve opening means should be
Performed when there is pressure in the boiler.
4.5 Maintenance
4.5.1 should be used according to the instructions boiler each auxiliary regularly burner, feed water pump and other auxiliary equipment for maintenance.
4.5.2 should regularly check the boiler safety valve, water gauge, pressure gauge valves and other instruments.
4.5.3 should be checked regularly boiler automatic control system, in particular the security alarm system.
4.5.4 Electrode water level controller should be checked regularly and grinding dirt water level electrode surface.
4.5.5 should be regularly checked and cleared furnace, smoke pipes and other heat transfer components on both sides of the soot and scale.
Specification requirements should be shutdown maintenance 4.5.6 Boiler shutdown.
4.6 boiler water
4.6.1 General boiler should be equipped with dosing devices or water treatment device, its water and boiler water quality should be consistent with GB/T 24947 requirements of.
4.6.2 boiler should generally be equipped with the necessary water quality testing equipment.
5 safety inspection requirements
5.1 In the boiler should be class requirements for regular inspection. Periodic inspection including external inspection and internal inspection.
5.2 boiler should generally be conducted once a year an external inspection carried out at least two internal inspection every 5 years, and two test interval period most
Not longer than three years.
5.3 When the internal tests and external tests conducted with one year, it should first conduct internal testing, external testing again.
5.4 For the test can not be performed inside the boiler pressure test may be 1.25 times the working pressure of the boiler to be replaced.
5.5 In addition to regular inspection, the boiler of the following circumstances, should also be examined internally.
a) cast before reassembling the boiler operation;
b) boiler stop running more than one year need to be restored before running;
c) by significant pressure components repaired or rebuilt and running again after one year.
5.6 boiler after major repairs or modifications, should be GB/T 11037 provisions of the hydrostatic test.
Inspection reports 5.7 boiler shall be placed in boiler technology archives, shelf life of at least 10 years.
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