1
/
of
8
PayPal, credit cards. Download editable-PDF and invoice in 1 second!
GB/T 24918-2010 English PDF (GBT24918-2010)
GB/T 24918-2010 English PDF (GBT24918-2010)
Regular price
$155.00 USD
Regular price
Sale price
$155.00 USD
Unit price
/
per
Shipping calculated at checkout.
Couldn't load pickup availability
Delivery: 3 seconds. Download true-PDF + Invoice.
Get QUOTATION in 1-minute: Click GB/T 24918-2010
Historical versions: GB/T 24918-2010
Preview True-PDF (Reload/Scroll if blank)
GB/T 24918-2010: Cryogenic emergency shutoff valve
GB/T 24918-2010
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 23.060.99
J 16
Cryogenic emergency shutoff valve
ISSUED ON: AUGUST 09, 2010
IMPLEMENTED ON: DECEMBER 31, 2010
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms ... 5
4 Technical requirements ... 5
5 Test methods ... 10
6 Inspection rules ... 13
7 Marking ... 15
8 Supply requirements ... 15
Cryogenic emergency shutoff valve
1 Scope
This Standard specifies the terminology, technical requirements, test methods,
inspection rules, appearance, marking and supply requirements of cryogenic emergency
shutoff valve (hereinafter referred to as emergency shutoff valve).
This Standard applies to nominal dimensions DN 15 ~ DN 200, nominal pressure PN
16 ~ 63, operating temperature -196 ℃ ~ -29 ℃, emergency automatic cut-off
temperature 70 ℃ ± 5 ℃, and using low-temperature media of oxygen, nitrogen, argon,
natural gas, ethylene (O2, N2, Ar, CNG, C2H4) and other gases and liquids.
2 Normative references
The terms in the following documents become the terms of this Standard by reference
to this Standard. For dated references, all subsequent amendments (not including errata
content) or revisions do not apply to this standard. However, parties to agreements that
are based on this Standard are encouraged to study whether the latest versions of these
documents can be used. For undated references, the latest edition applies to this
Standard.
GB/T 229, Metallic materials - Charpy pendulum impact test method (GB/T 229-
2007, ISO 148-1:2006, MOD)
GB/T 1047, Pipework components - Definition and selection of nominal size
(GB/T 1047-2005, ISO 6708:1995, MOD)
GB/T 1048 Pipework components - Definition and selection of nominal pressure
(GB/T 1048-2005, ISO/CD 7268:1996, MOD)
GB/T 1220, Stainless steel bars
GB/T 1222, Spring steels
GB/T 4240, Stainless steel wires (GB/T 4240-1993, neq JIS G4309:1988)
GB/T 9113 (all parts), Integral steel pipe flanges
GB/T 12220, General purpose industrial valves - Marking (GB/T 12220-1989, idt
ISO 5209:1977)
GB/T 12221, Metal calves - Face to face, end to end, center to face and center to
end dimensions (GB/T 12221-2005, ISO 5752:1982, MOD)
GB/T 12224, General requirements for industrial steel valves (GB/T 12224-2005,
AST MB 16.34a-1998, NEQ)
GB/T 12230, General purpose industrial valves - Specification of stainless steel
castings
GB/T 12235, Steel globe valves and lift check valve for petroleum petrochemical
and allied industries
GB/T 24925, Low temperature valve - Technical specifications
JB/T 106, Valves marking and paint
JB/T 6697, Tractors and machinery for agriculture and forestry - Electrical
equipment - Basic specifications
JB/T 6902-2008, Methods for liquid penetrant examination of valves
JB/T 7248, Technical specification for low temperature service steel casting for
valves
JB/T 7927, Valve cast steel visual quality requirements
JB/T 7928, Industrial valves - Delivery specification
JB/T 9218-2007, Non-destructive testing - Penetrant testing
3 Terms
The following terms and definitions are applicable to this Standard.
3.1
emergency shut-off valve
Value – installed on a tanker (tank truck), storage tank or pipeline – that can be quickly
shut off manually or automatically in the event of an accident.
4 Technical requirements
4.1 General requirements
In addition to complying with the provisions of this Standard, emergency shut-off
valves shall also comply with the provisions of GB/T 24925.
4.2 Parameters
4.4 Structural length
The structural length of the emergency shut-off valve shall be in accordance with the
provisions of GB/T 12221, or in accordance with the requirements of the order contract.
4.5 Appearance
Except for austenitic stainless-steel valves, the non-machined outer surfaces of other
metals shall be painted. The paint layer shall use coating of durability. The coating at
the marking shall ensure that the marking is clear; the color of the paint shall be in
accordance with JB/T 106. Special requirements are specified in the order contract.
4.6 Connection form
The connection forms of emergency shut-off valve shall be welded connection or
flanged connection. The welded connection shall comply with the provisions of GB/T
12224, and the flanged connection shall comply with the provisions of GB/T 9113.
Special requirements are specified in the order contract.
4.7 Cleaning requirements
All parts of the emergency shut-off valve shall be cleaned before assembly.
4.8 Performance requirements
4.8.1 Operating performance
Operate separately at normal and low temperatures. The emergency shut-off valve shall
move flexibly without jamming or crawling.
4.8.2 Sealing performance
4.8.2.1 The sealing performance test shall be subjected separately to low-pressure and
high-pressure sealing tests. After the low-pressure sealing test is qualified, perform the
high-pressure sealing test.
4.8.2.2 Normal temperature sealing performance test
Test pressure: low pressure is 0.1MPa, high pressure is 1.1 times the nominal pressure
of the valve, the test medium is nitrogen, the duration is 15 minutes, and there must be
no leakage.
4.8.2.3 Low temperature sealing performance
Test pressure: low pressure is 0.1 MPa, high pressure is 1.1 times the nominal pressure
of the valve, the test medium is helium, the duration is 15 minutes each, and the leakage
is not allowed to be greater than 2×DN, in mL/min.
4.8.3 Shell strength
4.8.3.1 For emergency shut-off valves used in LNG tank containers, the strength test
pressure of the shell (valve body, valve cover) shall be 4 times the tank design pressure;
for emergency shut-off valves used in other situations, the strength test pressure of the
shell (valve body, valve cover) is 1.5 times the nominal pressure.
4.8.3.2 After passing the shell strength test, the emergency shut-off valve shall have no
structural damage, and there shall be no visible leakage on the pressure-bearing wall
and the connection between the valve body and the valve cover.
4.8.4 Emergency shutoff time
The emergency shut-off valve shall close within 10 seconds from the time it starts to
close.
4.8.5 Vibration resistance
The emergency shut-off valve for tankers and tank trucks shall be resistant to vibration
and shall comply with the requirements of JB/T 6697.
4.8.6 Overtemperature shutdown
The fusible plug shall be able to melt when the ambient temperature reaches 70 ℃ ±
5 ℃, and the emergency shut-off valve shall automatically cut off.
4.8.7 Natural closure
For valves that rely on air pressure to open and close, when fully open, they shall be
able to remain open for 48 hours and will not naturally close.
4.8.8 Anti-static
When the power supply voltage does not exceed 12 V, the resistance of the anti-static
circuit of the valve disc, valve stem and valve body shall be less than 10 Ω.
4.8.9 No-load operating life
The emergency shut-off valve shall be able to meet the performance requirements after
opening and closing 2 000 times under no load.
4.9 Parts
4.9.1 Main pressure parts shall be inspected for flaw detection. Casting defects shall not
be lower than Level 2 (including Level 2) in JB/T 6902-2008, and forging defects ...
Get QUOTATION in 1-minute: Click GB/T 24918-2010
Historical versions: GB/T 24918-2010
Preview True-PDF (Reload/Scroll if blank)
GB/T 24918-2010: Cryogenic emergency shutoff valve
GB/T 24918-2010
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 23.060.99
J 16
Cryogenic emergency shutoff valve
ISSUED ON: AUGUST 09, 2010
IMPLEMENTED ON: DECEMBER 31, 2010
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms ... 5
4 Technical requirements ... 5
5 Test methods ... 10
6 Inspection rules ... 13
7 Marking ... 15
8 Supply requirements ... 15
Cryogenic emergency shutoff valve
1 Scope
This Standard specifies the terminology, technical requirements, test methods,
inspection rules, appearance, marking and supply requirements of cryogenic emergency
shutoff valve (hereinafter referred to as emergency shutoff valve).
This Standard applies to nominal dimensions DN 15 ~ DN 200, nominal pressure PN
16 ~ 63, operating temperature -196 ℃ ~ -29 ℃, emergency automatic cut-off
temperature 70 ℃ ± 5 ℃, and using low-temperature media of oxygen, nitrogen, argon,
natural gas, ethylene (O2, N2, Ar, CNG, C2H4) and other gases and liquids.
2 Normative references
The terms in the following documents become the terms of this Standard by reference
to this Standard. For dated references, all subsequent amendments (not including errata
content) or revisions do not apply to this standard. However, parties to agreements that
are based on this Standard are encouraged to study whether the latest versions of these
documents can be used. For undated references, the latest edition applies to this
Standard.
GB/T 229, Metallic materials - Charpy pendulum impact test method (GB/T 229-
2007, ISO 148-1:2006, MOD)
GB/T 1047, Pipework components - Definition and selection of nominal size
(GB/T 1047-2005, ISO 6708:1995, MOD)
GB/T 1048 Pipework components - Definition and selection of nominal pressure
(GB/T 1048-2005, ISO/CD 7268:1996, MOD)
GB/T 1220, Stainless steel bars
GB/T 1222, Spring steels
GB/T 4240, Stainless steel wires (GB/T 4240-1993, neq JIS G4309:1988)
GB/T 9113 (all parts), Integral steel pipe flanges
GB/T 12220, General purpose industrial valves - Marking (GB/T 12220-1989, idt
ISO 5209:1977)
GB/T 12221, Metal calves - Face to face, end to end, center to face and center to
end dimensions (GB/T 12221-2005, ISO 5752:1982, MOD)
GB/T 12224, General requirements for industrial steel valves (GB/T 12224-2005,
AST MB 16.34a-1998, NEQ)
GB/T 12230, General purpose industrial valves - Specification of stainless steel
castings
GB/T 12235, Steel globe valves and lift check valve for petroleum petrochemical
and allied industries
GB/T 24925, Low temperature valve - Technical specifications
JB/T 106, Valves marking and paint
JB/T 6697, Tractors and machinery for agriculture and forestry - Electrical
equipment - Basic specifications
JB/T 6902-2008, Methods for liquid penetrant examination of valves
JB/T 7248, Technical specification for low temperature service steel casting for
valves
JB/T 7927, Valve cast steel visual quality requirements
JB/T 7928, Industrial valves - Delivery specification
JB/T 9218-2007, Non-destructive testing - Penetrant testing
3 Terms
The following terms and definitions are applicable to this Standard.
3.1
emergency shut-off valve
Value – installed on a tanker (tank truck), storage tank or pipeline – that can be quickly
shut off manually or automatically in the event of an accident.
4 Technical requirements
4.1 General requirements
In addition to complying with the provisions of this Standard, emergency shut-off
valves shall also comply with the provisions of GB/T 24925.
4.2 Parameters
4.4 Structural length
The structural length of the emergency shut-off valve shall be in accordance with the
provisions of GB/T 12221, or in accordance with the requirements of the order contract.
4.5 Appearance
Except for austenitic stainless-steel valves, the non-machined outer surfaces of other
metals shall be painted. The paint layer shall use coating of durability. The coating at
the marking shall ensure that the marking is clear; the color of the paint shall be in
accordance with JB/T 106. Special requirements are specified in the order contract.
4.6 Connection form
The connection forms of emergency shut-off valve shall be welded connection or
flanged connection. The welded connection shall comply with the provisions of GB/T
12224, and the flanged connection shall comply with the provisions of GB/T 9113.
Special requirements are specified in the order contract.
4.7 Cleaning requirements
All parts of the emergency shut-off valve shall be cleaned before assembly.
4.8 Performance requirements
4.8.1 Operating performance
Operate separately at normal and low temperatures. The emergency shut-off valve shall
move flexibly without jamming or crawling.
4.8.2 Sealing performance
4.8.2.1 The sealing performance test shall be subjected separately to low-pressure and
high-pressure sealing tests. After the low-pressure sealing test is qualified, perform the
high-pressure sealing test.
4.8.2.2 Normal temperature sealing performance test
Test pressure: low pressure is 0.1MPa, high pressure is 1.1 times the nominal pressure
of the valve, the test medium is nitrogen, the duration is 15 minutes, and there must be
no leakage.
4.8.2.3 Low temperature sealing performance
Test pressure: low pressure is 0.1 MPa, high pressure is 1.1 times the nominal pressure
of the valve, the test medium is helium, the duration is 15 minutes each, and the leakage
is not allowed to be greater than 2×DN, in mL/min.
4.8.3 Shell strength
4.8.3.1 For emergency shut-off valves used in LNG tank containers, the strength test
pressure of the shell (valve body, valve cover) shall be 4 times the tank design pressure;
for emergency shut-off valves used in other situations, the strength test pressure of the
shell (valve body, valve cover) is 1.5 times the nominal pressure.
4.8.3.2 After passing the shell strength test, the emergency shut-off valve shall have no
structural damage, and there shall be no visible leakage on the pressure-bearing wall
and the connection between the valve body and the valve cover.
4.8.4 Emergency shutoff time
The emergency shut-off valve shall close within 10 seconds from the time it starts to
close.
4.8.5 Vibration resistance
The emergency shut-off valve for tankers and tank trucks shall be resistant to vibration
and shall comply with the requirements of JB/T 6697.
4.8.6 Overtemperature shutdown
The fusible plug shall be able to melt when the ambient temperature reaches 70 ℃ ±
5 ℃, and the emergency shut-off valve shall automatically cut off.
4.8.7 Natural closure
For valves that rely on air pressure to open and close, when fully open, they shall be
able to remain open for 48 hours and will not naturally close.
4.8.8 Anti-static
When the power supply voltage does not exceed 12 V, the resistance of the anti-static
circuit of the valve disc, valve stem and valve body shall be less than 10 Ω.
4.8.9 No-load operating life
The emergency shut-off valve shall be able to meet the performance requirements after
opening and closing 2 000 times under no load.
4.9 Parts
4.9.1 Main pressure parts shall be inspected for flaw detection. Casting defects shall not
be lower than Level 2 (including Level 2) in JB/T 6902-2008, and forging defects ...
Share







