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GB 10879-2009: [GB/T 10879-2009] Valves for dissolved acetylene cylinders
Status: Obsolete GB 10879: Evolution and historical versions
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[GB/T 10879-2009] Valves for dissolved acetylene cylinders
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GB 10879-2009
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| GB 10879-1989 | English | 359 |
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Valves for dissolved acetylene cylinders
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GB 10879-1989
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PDF similar to GB 10879-2009
Basic data | Standard ID | GB 10879-2009 (GB10879-2009) | | Description (Translated English) | [GB/T 10879-2009] Valves for dissolved acetylene cylinders | | Sector / Industry | National Standard | | Classification of Chinese Standard | J76 | | Classification of International Standard | 23.020.30 | | Word Count Estimation | 11,172 | | Date of Issue | 2009-06-25 | | Date of Implementation | 2010-04-01 | | Older Standard (superseded by this standard) | GB 10879-1989 | | Quoted Standard | GB/T 228; GB/T 1220; GB/T 1804; GB/T 4423; GB/T 5121.1; GB/T 5121.3; GB/T 5121.9; GB/T 5231; GB 8335; GB/T 8336; GB 8337; GB/T 10567.2; HG/T 2349; HG/T 2902 | | Regulation (derived from) | Announcement of Newly Approved National Standards No. 8, 2009 (No. 148 overall) | | 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 acetylene cylinder valve model, the basic type and size, technical requirements, inspection and test methods, inspection rules, marking, packaging, storage and transportation. This standard applies to an ambient temperature of -40��C ~ + 60��C, nominal working pressure of 3 MPa dissolved acetylene cylinder valve (hereinafter referred to as the valve). | GB 10879-2009: [GB/T 10879-2009] Valves for dissolved acetylene cylinders---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.
Valves for dissolved acetylene cylinders
ICS 23.020.30
J76
National Standards of People's Republic of China
Replacing GB 10879-1989
Acetylene cylinder valve
Posted 2009-06-25
2010-04-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Table of Contents
Preface Ⅰ
1 Scope 1
2 Normative references 1
3 Type 1
4 basic types and dimensions of 2
5 2 Technical Requirements
6 Inspection and Test Method 4
7 Inspection rules 5
8 signs, packaging, storage and transportation 7
Foreword
All the technical contents of this standard is mandatory.
This standard replaces GB 10879-1989 "acetylene cylinder valve."
This standard compared with GB 10879-1989, the major additions and changes to the following.
--- Increased valve models;
--- Increasing the overall height of the valve body, the thickness of the side body, neck, neck taper thread and other basic dimensions;
--- Increased requirements for mechanical properties of the valve requirements, test methods and material body resistance to stress corrosion test;
--- Increase the quality requirements of the valve;
--- Fusible alloy plug operating temperature increased from 95 ℃ ± 5 ℃ to 100 ℃ ± 5 ℃;
--- Temperature resistance increased from -40 ℃ ~ + 65 ℃ to -40 ℃ ~ + 60 ℃;
--- Pressure test pressure increased from 2 times the nominal working pressure to 15 times the nominal working pressure;
--- Increased installation and performance test methods for valves;
Increasing the manufacturing license number on the valve --- a sign;
--- According to GB/T 1.1-2000 and GB/T 1.2-2002 standards, the contents of this standard, structure and text were
modify.
This standard by the National Standardization Technical Committee cylinder (SAC/TC31) and focal points.
This standard was drafted. Shanghai gas valve plant, Xiangshan system Valve Co., Ltd., Shanghai High Pressure Container Co., Ltd.
The main drafters of this Standard. Money Fat, Weng Guodong, neon red hair, Guqiu Hua, Chen Weiming.
This standard replaces the standards previously issued as follows.
--- GB 10879-1989.
Acetylene cylinder valve
1 Scope
This standard specifies the acetylene cylinder valve model, the basic type and size, technical requirements, inspection and test methods, inspection rules, marking
Chi, packaging, storage and transportation.
This standard applies to an ambient temperature of -40 ℃ ~ + 60 ℃, nominal working pressure 3MPa dissolved acetylene cylinder valve (hereinafter
He said valve).
Note. This standard refers to a pressure gauge.
2 Normative references
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
GB/T 228 metal materials at room temperature tensile test method (GB/T 228-2002, eqv ISO 6892.1998)
GB/T 1220 stainless steel rods
GB/T 1804 General tolerances Tolerances for linear and angular dimensions without individual tolerance (GB/T 1804-2000, eqv ISO 2768-1.
1989)
GB/T 4423 copper and copper alloy rod drawing
5121.1 Determination of copper GB/T and copper alloys - Determination of copper content (GB/T 5121.1-2008, ISO 1554. 1976,
ISO 1553. 1976, Wroughtandcastcopperaloysandunaloyedcoppercontainingnotlessthan99,90%
ofcopper-Determinationofcoppercontent-Electrolyticmethod, MOD)
GB/T 5121.3 Determination of copper and copper alloys - Determination of lead content (GB/T 5121.3-2008, ISO 4749. 1984,
Copperaloys-Determinationofleadcontent-Flameatomicabsorptionspectrometricmethod, MOD)
GB/T 5121.9 Determination of copper and copper alloys - Determination of iron content (GB/T 5121.9-2008, ISO 4748. 1984,
ISO 1812. 1976, Copperaloys-Determinationofironcontent, MOD)
GB/T 5231 Wrought copper and copper alloy chemical composition and shape of the product
GB 8335 cylinders dedicated thread
GB/T 8336 cylinders dedicated thread gauge
GB 8337 cylinders with fusible alloy plug
GB/T 10567.2 copper and copper alloy processing residual stress - Ammonia test methods smoked test method
HG/T 2349 1010 polyamide resin
HG/T 2902 molded PTFE resin
3 Models
Valve code with medium Pinyin first capital letter "RYF" said outlet structure type of clamp-style, with Arabic numerals "1"
He said product modifications numbers sequentially in the order indicated by capital letters.
Example.
RYF -
acetylene cylinder valve code
outlet to clamp formula
product modifications No.
4 basic types and dimensions
4.1 The basic types and dimensions of the valve according to FIG. 1, the requirements in Table 1.
Millimeters
Figure 1 valve basic version
Table 1 valve basic dimensions in millimeters
Taper thread
PZ
Nominal diameter
Dg
basic size
39 4 > 97 ~ 107 41 ~ 42 21 50 17.67 29 30 0-1 9.5 26 30
4.2 valve inlet is PZ39 specification taper thread, its type, size and manufacturing precision should meet the requirements of GB 8335.
4.3 valve outlet connection type is clip type, and size of the type shown in Figure 1.
4.4 fusible alloy plug orifice diameter should be not less than the nominal diameter of the valve.
5 Technical requirements
5.1 Material
5.1.1 Metal Materials
The main parts of the valve (valve, pressure cap sealing ring) materials should adopt HPb59-1 bar, and in accordance with Table 2. Such as the use of other
The material, the copper content should be less than 70% (mass ratio), the mechanical properties shall not be less than specified in Table 2, and is compatible with the medium.
Table 2 main parts of the valve metal material
No. Project Content
Mechanical Properties
(GB/T 4423 regulations)
Bar diameter or edge distance /
mm
Tensile strength Rm /
(N/mm2)
Elongation A /
5 to 20 is not less than 420 not less than 12
> 20 to 40 is not less than 390 not less than 14
chemical composition
(GB/T 5231 regulations)
Cu /% Pb /% Fe /%
57.0 ~ 0.9 ~ 60.0 0.8 0.5
Body material in addition to meeting the above requirements, it must be approved by the stress corrosion test, it should be no cracks after the test.
Stem material should adopt 2Cr13, its chemical composition and mechanical properties shall comply with GB/T 1220's.
Fusible alloy plug material should be formulated using bismuth, lead and tin and other elements, it should meet the requirements of GB 8337.
Air intake valve bore shall be provided with gas filter parts, the performance of the material should be compatible with the medium.
5.1.2 non-metallic materials
Non-metallic material of the valve should be in accordance with Table 3.
Table 3 non-metallic materials valve
Part Name Material Compliance
Seals
Polyamide 1010
Polytetrafluoroethylene
HG/T 2349
HG/T 2902
5.2 processing requirements
5.2.1 The valve should be forging molding. Body surface should be free of cracks, wrinkles, inclusions, and so is not detrimental to valve performance full of defects. Such as using blunt
, Surface should be uniform color, luster, no exposed end of the phenomenon. The use of shot peening, the surface of the pit size, depth should be uniform.
5.2.2 No Note dimensional tolerances according to GB/T 1804 standard m-level processing.
5.2.3 Valve design quality was 630g. Same type, quality specifications, the trademark should be the same valve, the valve assembly after the actual quality of the valve
Design quality tolerance of not more than 5%.
5.3 Performance Requirements
5.3.1 of the opening and closing
In nominal working pressure, the valve opening and closing torque shall be no greater than 10N · m.
5.3.2 tightness
In nominal working pressure, the valve is in the closed and open state should be free of any leakage.
5.3.3 resistance to vibration
In nominal working pressure, the valve should be able to withstand the displacement amplitude 2mm (P-P), the frequency of 33.3Hz, time of 30min, in either direction
Vibration, each threaded connection to the valve should not be loose, and there is no leakage.
5.3.4 fusible alloy plug operating temperature
Fusible alloy plug operating temperature of 100 ℃ ± 5 ℃.
5.3.5 Temperature Resistance
Under nominal operating pressure, the valve in the temperature range of -40 ℃ ~ + 60 ℃ should be no leakage.
5.3.6 Body pressure resistance
At 15 times the nominal working pressure, the valve should be no leakage and visible deformation.
5.3.7 Durability
In nominal working pressure, open and close the valve full stroke 2500, there should be no leaks and other anomalies.
5.3.8 installation performance
Torque valve installed in the cylinder is allowed to withstand 500N · m, after installation of the valve should be no visible leakage and deformation and damage.
6 inspection and test methods
6.1 valve metal material mechanical testing, chemical analysis methods and resistance to stress corrosion test
Body metal material tensile test specimens and the test methods according to GB/T 228, chemical composition analysis method according to GB/T 5121 relevant part,
Body material resistance to stress corrosion test methods according to GB/T 10567.2, the results should be consistent with the provisions of 5.1.1.
6.2 Visual inspection
Valve appearance with visual inspection methods. Check the valve shall comply with 5.2.1. Threaded outer surface and other metal parts should not
Burr, bump injury, scratches and so on.
6.3 out of air intake check the thread size
Air inlet valve taper thread used in line with GB/T 8336 standard manufacturing gauge inspection shall comply with the provisions of 4.2.
Valve outlet size Figure 1 inspection shall comply with the provisions of 4.3.
6.4 QA
The valve assembly was placed in a weighing of 0 ~ 1000g, being no more than 1g on the weighing scales shall comply with the provisions of 5.2.3.
6.5 Test hoist
Valve means on the dedicated (dedicated devices are shown in Figure 2), according to a predetermined torque 5.3.1 closed valve. Then, the valve to the filling inlet
Nitrogen or air catholic working pressure, under this pressure, without leakage. Then, in the case under pressure, with a torque wrench to open the valve,
In this case the measured opening force should be less than 10N · m.
Schematic diagram 2 Dedicated devices
6.6 tightness test
The valve is mounted on a special device, respectively, the valve is closed and any open state (when the valve is turned on when plugging outlet).
Then, to the air inlet valve is filled with nitrogen or air catholic working pressure, immersed in water, each sustained 1min, results should meet 5.3.2
Provisions.
6.7 Vibration resistance test
The valve is installed on a dedicated device 5.3.1 specified torque shut-off valve to the valve inlet filled with nitrogen or air, said operating pressure catholic
force. Then, the exclusive device is mounted on the vibration test stand, do displacement amplitude of 2mm (P-P), a frequency of 33.3Hz, time
30min, in either direction of the vibration, the results should be consistent with the provisions of 5.3.3.
6.8 fusible alloy plug operating temperature test
The valve is installed on a dedicated device 5.3.1 specified torque shut-off valve to the valve inlet filled with nitrogen or air to 0.35MPa of
pressure. Then, a special device placed in the tank filled with glycerol, at a rate of 2 ℃/min ~ 3 ℃/min heating up, when the valve is easy on the fluxing
Plug melts when the gas leak, when the measured temperature glycerin tank shall meet the requirements of 5.3.4.
6.9 Temperature Test
The valve is mounted on a special device, plugging the outlet valve, open the valve, the valve to the inlet filled with nitrogen or air catholic working pressure, discharge
Into the incubator to 2 ℃/min ~ rate 3 ℃/min is gradually warmed to 60 ℃ ± 2 ℃, heat 2h (opening and closing each 1h), in air-cooled to room
After the temperature into the low temperature chamber to 2 ℃/min ~ rate 3 ℃/min is gradually cooled to -40 ℃ ± 2 ℃, heat 2h (opening and closing each 1h), which
The results should be consistent with the provisions of 5.3.5.
6.10 Durability Test
The valve is mounted on a special device, plugging the outlet valve, the valve to the inlet filled with nitrogen or air catholic working pressure and then, the special
With a device mounted on a life testing machine, 8 times/min ~ 15 times/min and a frequency no greater than 10N · m of opening and closing moments, the whole trip
(Stroke should not exceed 1/4 of the seat diameter) of the valve opening and closing times of the 2500 trial. After the test, then the provisions of 6.6 air tightness test,
The result should meet the requirements of 5.3.2.
6.11 Body Pressure Test
Blocking valve with the outside of each vent (except tapered thread intake estuary), the valve inlet and hydraulic pump connected to the pump through a hydraulic valve
Filled with water up to 15 times the nominal working pressure, pressure 3min, the results should be consistent with the provisions of 5.3.6.
Note. Other suitable liquid test medium is water or a viscosity of not more than water test gauge accuracy class shall not be less than 1.5, the pressure gauge should range
Test pressure (1.5 - 2) times.
6.12 Performance Test Installation
The valve is installed on a dedicated device with a torque wrench and pull tight, the results should be consistent with the provisions of 5.3.8.
7 Inspection rules
7.1 material inspection
7.1.1 Materials and parts into the plant must have a quality certificate.
7.1.2 Copper mechanical properties (Rm, A) and chemical composition (Cu, Pb, Fe) according to the batch of raw materials into the plant retest.
7.2 factory inspection
7.2.1 Test one by one
One by one test shall include the following.
a) visual inspection;
b) out of the air intake thread inspection;
c) tightness test.
7.2.2 Bulk sampling
Bulk sampling content in addition to individually test items should be added the following.
a) quality check;
b) fusible alloy plug operating temperature test.
7.2.3 Sampling methods and determination
Sampling valves shall be individually qualified products extracted in continuous production batch by each production over 5000 is, each batch extraction
Sample 3, when the number of batches of the finished product less than 5000, the same sample drawn three. During the inspection, if a valve does not meet the criteria of a
One of the requirements, then doubled extraction, re-testing as there is still the project failed, the batch is defective valve or re-by inspection.
7.3 Type tests
7.3.1 In the following cases the valve type test must be carried out.
a) new product trial to identify stereotypes;
b) structure, process, material and other major changes;
c) When more than one year Product Discontinuance reproduction;
d) to apply for a license, review and quality supervision and inspection agencies when requested.
7.3.2 Valve type tests, test sequence, the number shown in Table 4.
7.3.3 Type test valve should be inspected product is extracted, it is determined according to the provisions of 7.2.3.
Table 4 type of pilot projects
Name test specimen sample sequence number of pilot projects
material
1 7.1.2 mechanical properties of copper (Rm, A); chemical composition (Cu, Pb, Fe) 3 detection
2 6.1 Body material resistance to stress corrosion test 3
Test valve
1 4.1 check valve basic size (according to the requirements of Table 1)
2 6.2 Visual inspection
3 6.3 out of air intake check the thread size
4 6.4 QA
5 6.5 opening and closing test
6 6.6 tightness test
7 6.7 resistance to vibration test
8 6.8 fusible alloy plug operating temperature test
1 4.1 check valve basic size (according to the requirements of Table 1)
2 6.2 Visual inspection
3 6.3 out of air intake check the thread size
4 6.4 QA
5 6.5 opening and closing test
6 6.6 tightness test
7 6.7 resistance to vibration test
8 6.9 Temperature Test
Test pressure valve 9 6.11
1 4.1 check valve basic size (according to the requirements of Table 1)
2 6.2 Visual inspection
3 6.3 out of air intake check the thread size
4 6.4 QA
5 6.5 opening and closing test
6 6.6 tightness test
7 6.7 resistance to vibration test
8 6.10 Durability Test
9 6.12 Performance Test Installation
8 signs, packaging, storage and transportation
8.1 mark
Valves shall have the following permanent signs.
a) type valve;
b) the valve nominal working pressure;
c) the manufacturer or trademark;
d) the production date or batch number;
e) manufacturing license number;
f) inspection mark.
8.2 Packaging
Packaging should be removed before the water remaining in the valve, the valve packing should be kept clean, out of air intake thread from damage, should be attached to the box
Product certification, packing list and instructions for use.
8.2.1 shall be marked on the box.
a) manufacturer's name;
b) the valve name, model;
c) sign the necessary operational requirements;
d) The number and gross weight;
e) volume (length × width × height);
f) the date of production or batch number;
g) manufacturing license number.
8.2.2 Product certification shall indicate the following.
Name a) valve, model;
b) nominal diameter;
c) nominal working pressure;
d) Valve Lot;
e) product standard code execution;
f) date of inspection;
g) quality inspection department seal;
h) the design quality valve.
8.2.3 The packing list should indicate the following.
a) manufacturer's name, address;
b) the valve name, model;
c) the quantity, GW, NW;
d) Packers flag;
e) the packing date.
8.2.4 Instructions shall indicate the following.
a) use;
b) requirements;
c) considerations.
8.3 Storage
Valve should be placed in ventilated, dry and clean room. Transport loading and unloading should be kept away to prevent the weight and impact.
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