1 Scope
This standard specifies the terms and definitions, structural types, parameters, models, technical requirements, test methods, inspection rules, marking, painting and supply requirements of emergency shutoff valve for LG equipment (hereinafter referred to as shutoff valve).
This standard is applicable to emergency shutoff valve for LG equipment, of which, the nominal pressure is PN10~PN25, the nominal dimension is DN15~DN350, the working temperature is not greater than 50℃, the applicable media are LPG, liquid ammonia, liquid chlorine, liquid sulfur dioxide, propylene, propane, butane, butadiene and their mixture.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this standard. However parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T 699 Quality Carbon Structural Steels
GB/T 1047 Pipework Components--Definition and Selection of DN (Nominal Size) (GB/T 1047-2005, ISO 6708: 1995, MOD)
GB/T 1048 Pipework Components - Definition and Selection of PN (GB/T 1048-2005, ISO/CD 7268: 1996, MOD)
GB/T 1220 Stainless Steel Bars
GB/T 1239.2-1989 Cold Coiled Helical Compressions Springs - Technical Specifications (neq JIS B2707: 1987)
GB/T 4240 Stainless Steel Wires (GB/T 4240-1993, neq JIS G4309: 1988)
GB/T 9113.1 Integral Steel Pipe Flanges with Flat Face or Raised Face
GB/T 9113.2 Integral Steel Pipe Flanges with Male and Female Face
GB/T 9124 Specification for Steel Pipe Flanges
GB/T 10478 Railway Tank Car for Liquefied Gases
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 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 12235-2007, BS 1873-1975(R1998), NEQ)
GB/T 13927 Industrial Valves - Pressure Testing (GB/T 13927-2008, ISO/DIS 5208: 2007, MOD)
JB/T 106 Valves Marking and Paint
JB/T 308 Valves Model Designation Method
JB 4727 Low-alloy Steel Forgings for Low Temperature Pressure Vessels
JB 4728 Stainless Steel Forgings for Pressure Vessels
JB/T 7248 Technical Specification for Low Temperature Service Steel Casting for Valves
JB/T 7928 General Purpose Industrial Valve - Delivery Specification
3 Terms and Definitions
Foreword i
1 Scope
2 Normative References
3 Terms and Definitions
4 Structural Types, Parameters and Models
4.1 Structural Types
4.2 Parameters
4.3 Models
5 Technical Requirements
5.1 Maximum Working Pressure
5.2 Structural Length
5.3 Appearance
5.4 Valve Body
5.5 Spring
5.6 Hydraulic and Pneumatic Elements
5.7 Auto-shutoff Equipment of Fusible Element
5.8 Performance Requirements
5.9 Material
6 Test Methods
6.1 Shell Test
6.2 Air-tightness Test
6.3 Excess Flow Performance Test
6.4 Emergency Shutoff Performance Test
6.5 Natural Closing Test
6.6 Vibration Test
6.7 Repeated Operation Test
6.8 Fusible Element Fusion Test
6.9 Hydraulic and Pneumatic Element Tests
7 Inspection Rules
7.1 End-of-manufacturing Test
7.2 Type Test
7.3 Sampling Method
8 Marking
8.1 Marking Contents
8.2 Designation on Valve Body
8.3 Mark on Nameplate
9 Painting
10 Supply Requirements
Annex A (Normative) Vibration-resistance Performance Test Method of Emergency Shutoff Valve
Annex B (Informative) Order Contract Data Sheet for Emergency Shutoff Valve for LG Equipment
