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Inspection and installation specification of valves in the petroleum and natural gas industry of the People's Republic of China
Specification for test and installation of valveSY/T4102-95
Editor: China National Petroleum and Natural Gas First Construction CompanyApproval department: China National Petroleum and Natural Gas CorporationPetroleum Industry Press
1995Beijing
Valve procurement
Valve inspection
General requirements
Valve appearance and size inspection
Disassembly inspection
Inspection of transmission device
Valve and safety valve test
General provisions
Shell test
Seal test
Safety valve test
Valve management
Valve storage
Valve data management
Valve installation
General rules
Protection of valves during pipeline flushing
Acceptance of completed works
Appendix A
Appendix B
Appendix C
Appendix D
Valve arrival inspection and acceptance record
Valve test record
Safety valve adjustment test record
This specification applies during the period
Attached notes
(10)
(15)
(18)
( 26 )
( 27 1
Inspection and installation specification of accessory valves (29)
Document of China National Petroleum Corporation
(95) CNPC Technical Supervision No. 731
Notice of the competent authorities on the approval and issuance of the Standard for Investigation Methods of Corrosion and Protection of Steel Pipelines and Storage Tanks and other 26 oil and gas industry standards
To all relevant units:
The Standard for Investigation Methods of Corrosion and Protection of Steel Pipelines and Storage Tanks and other 26 oil and gas industry standards (draft): have been reviewed and approved and are now approved as white oil and gas industry standards and are hereby issued. The numbers and names of the various standards are as follows: 1
SY / T 0087-95
SY 7T 0545-1995
SY T 4013-95
SY /T 4041-95
SY/T 4084--95
SY : T 4085--95
Standard for corrosion and protection investigation of steel pipelines and storage tanks by film method
Determination of thermal characteristic parameters of wax precipitation in crude oil
Scanning calorimetry
Technical standard for polyhexene anticorrosion layer of buried steel pipeline (replaces SYJ4013-87)
Installation and acceptance specification for wet steam generator for oilfield (replaces SYJ404I-89)
Technical specification for beach environmental conditions and loads
Technical specification for oil and gas gathering and transportation in Guanhaizhou field
SYT 4086 95
SY7 T 408795
SY/T 4088-95
SY/ T 408995
SY /T 4090---95
SY/ T 409195
4092-95
4093—95
SYT 4094-95
SYT 4095 95
SY/T 4096-95
SY / T 4097-95
SY/ T 4098 95
SY/T 4099-95
SY/ T 4100 -95
SY/T 4101-95
SYr 4102 -95
SY / T 4103-- 1995
SY 4104-- 95
26. SYT 0088 95
Technical specification for design and construction of pipeline network on beach and sea structures
Technical specification for ventilation and air conditioning of beach and sea petroleum projects Technical specification for water supply and drainage of Weihai oil works Technical specification for electrical engineering of Weihai oil projects
Technical specification for power generation facilities of Weihai oil projects Technical specification for lip corrosion prevention of beach and sea oil projects
Technical specification for thermal insulation of Weihai oil projects
Technical specification for selection and installation of cranes on beach and sea oil facilities
Technical specification for design and construction of shallow-water steel platform structures
Technical specification for design and construction of shallow-water steel mobile platform structures
Technical specification for wellhead protection devices of offshore oil fields Fan
Technical specification for the design and construction of sloping sandstone artificial island structures on the beach
Technical specification for the design and construction of steel-formed concrete artificial island structures on the beach
Technical specification for the design and construction of beach seawalls
Technical specification for the survey of Wei Ze engineering
Technical specification for the investigation of Wei Hai Yanshi engineering
Specification for the inspection and installation of valves
Welding and acceptance of steel pipelines
Quality inspection and assessment standards for oil construction projects
Technical standard for the protection of the outer wall of the bottom of steel tanks
The above standards shall come into force on June 1, 1996. China National Petroleum Corporation
December 18, 1995
1.0.1: In order to standardize the purchase, inspection, acceptance and installation of valves in the oil and gas industry, and to ensure the quality of valve installation and use, this specification is specially formulated. 1.0.2 This specification applies to the purchase, arrival inspection, pressure test and installation of gate valves, stop valves, plug valves, ball valves, check valves and butterfly valves commonly used in oil and gas field surface construction projects, long-distance pipeline projects and oil and chemical construction projects. Other types of valves can also be implemented as a reference after consultation and agreement with the design or supplier. 1.0.3 When the design documents or valve technical conditions have special requirements for inspection and pressure testing, they should be implemented according to special requirements.
1.0.4 During the test and installation of valves, the national and industry laws and regulations on safety, labor protection, etc. should be strictly implemented to ensure safe production. 2.0.1
2 Valve procurement
The model and specification of the purchased valve must meet the design requirements. 2.0.2
The valve manufacturer must have a sound measurement system and reliable quality assurance capabilities.
2.0.3 For valves with special design requirements, they must be indicated in the order contract and inspected and accepted according to the design requirements. If necessary, they can be inspected and accepted at the valve manufacturer.
2.0.4 Before the valve is put into storage, the relevant personnel must check the model, specification and technical documents of the purchased valve according to the design requirements and contract provisions. The mark on the valve body should comply with the provisions of GB12220-90 "General Valve Marking" and check the appearance. Only after passing the inspection can it be put into storage. The valve arrival inspection and acceptance record must be filled in during the storage inspection (the format is shown in Appendix A of this standard). 3 Valve Inspection
3.1 General Requirements
The materials of the valve body, packing, gasket, etc. must comply with the relevant national product standards.
The valve must have a product certificate and a nameplate of the manufacturer. 3.1.2
The contents of the certificate shall comply with the following provisions: (1) Manufacturer name and date of manufacture:
(2) Product name and model;
(3) Nominal pressure, nominal diameter, applicable medium and temperature: (4) Based on the standard, inspection conclusion and inspection date; (5) Factory number;www.bzxz.net
(6) Signature and seal of the inspection personnel and the responsible inspection personnel. ：The nameplate should indicate the nominal pressure, nominal diameter, operating temperature and working environment. For high-pressure valves, alloy valves and special valves, there should also be a product manual, which includes:
（1）Manufacturer name:
（2）Application and main performance specifications;
（3）Working principle and structural description
（4）Structural diagram with main external dimensions and connection dimensions【5】Material of main parts;
Maintenance, care, installation and use precautions (6)
（7）Possible faults and solutions: 8) List of accessories ,
For valves used for extremely toxic and highly hazardous media and flammable and combustible media, the following test qualification certificates shall also be available: (Valves that require low-temperature sealing tests in the design shall have low-temperature sealing test qualification certificates issued by the manufacturer:
(2) For steel valves used for extremely toxic and highly hazardous media and flammable and combustible media, the manufacturer's non-destructive inspection qualification certificate shall be available. Note: The classification of extremely toxic and highly hazardous media and flammable media shall be in accordance with the provisions of the "Regulations on Safety Technical Supervision of Pressure Vessels" in the Labor Law No. 199018. 3.1.4. For welding valves with extremely and highly hazardous media and flammable and combustible media, 5% of each batch and no less than one valve body hardness test shall be conducted. If there are unqualified ones, another 20% shall be sampled; if there are still unqualified ones: · Check them one by one. 3.1.5 For alloy steel valves, the shells shall be spectrally analyzed one by one, the material shall be checked, and the valve body shall be marked and a spectral analysis report shall be issued. 3.1.6. For valves with special requirements for high temperature, high pressure, oil resistance, corrosion resistance, and low temperature resistance: 1% of each batch (same manufacturer, same specification, same model, and delivered at the same time) and no less than one shall be sampled, and the shell material shall be spectrally analyzed. If there are unqualified ones, please check them one by one or they shall not be used.
3.2 Check the appearance and size of the valve
32.1 Before installation, the valves should be inspected for appearance and operation one by one, and their quality should meet the following requirements:
3.2.1.1 There should be no cracks, sand holes, mechanical damage, rust and other defects on the surface, as well as missing parts, dirt, nameplate shedding and color code discrepancy. The relevant markings on the valve should be correct, complete and clear, and meet the requirements of relevant standards. 3.2.1.2 There should be no defects such as water accumulation, rust, dirt and damage in the valve body: the flange sealing surface should not have radial grooves and other damage that affects the sealing performance. Both ends of the valve should be protected by protective covers.
3.2.1.3 The opening and closing parts of ball valves and plug valves should be in the open position, and the closing parts of other valves should be in the closed position: the opening and closing parts of check valves should be in the closed position and temporarily fixed.
3.2.1.4 The handle or handwheel of the valve should be flexible and easy to operate without sticking. The stop valve or valve core should move flexibly and correctly without eccentricity, displacement and tilting. 3.2.1.5 The opening and closing marks of the plug valve should be consistent with the position of the hole. The plug should have sufficient grinding allowance after assembly.
3.2.1.6 The threads of major components such as valve stems, valve stem nuts and connecting nuts should be smooth and free of defects such as burrs, scars and cracks. The exposed threaded parts should be protected.
3.2.2 Valves shall be inspected by sampling 10% of the batch and no less than 1 piece for dimensional inspection. If there are any unqualified ones, another 20% shall be inspected; if there are still unqualified ones, they shall be inspected one by one and the quality shall comply with the following provisions.
The structural length, diameter, flange, thread, etc. of the valve shall comply with the specifications.
3.2.2.2 The connecting flange sealing surfaces of straight-through cast steel valves shall be parallel to each other, and the parallelism deviation shall not exceed 0.15mm for every 100mm of flange sealing surface diameter. The connecting flange sealing surfaces of right-angle valves shall be perpendicular to each other, and the verticality deviation shall not exceed 0.3mm for every 100mm of flange sealing surface diameter. 3.2.2.3 The sealing surfaces of the straight-through cast iron valve connecting flanges are parallel to each other. The parallelism deviation shall not exceed 0.2mm for every 100mm of flange sealing surface diameter: the verticality deviation of the sealing surface of the right-angle cast iron valve connecting flange shall not exceed 0.4mm.
3.2.2.4 The center of the gate sealing surface of the gate valve must be higher than the center of the valve body sealing surface: when the gate sealing surface is worn, the closed position drops, but the valve body and gate sealing surface should still be fully matched. The gate sealing surface wear allowance shall comply with the provisions of Table 3.2.2-1. The degree of fit between the gate sealing surface of the gate shall comply with the requirements of Table 3.2.2-2. 3.2.2.5
Wear allowance of gate sealing surface of valve
Nominal diameter (mm)
25~50
65-130
350~400
500~60m
Table 3.2.2-1
Wear capacity (mm)
Wear allowance of gate sealing surface of valve
Nominal diameter (mm)
50-100
125 ~ 250
300~450
Table 3.2.2-2
Degree of fit (%)
Deviation of the structural length of the spring loaded safety valve body and the vertical deviation of the inlet and outlet flange sealing surface 3.2.3
The vertical deviation of the inlet and outlet flange sealing surface shall comply with the provisions of Table 3.2.3. Its structure is shown in Figure 3.2.3. Structural length and vertical deviation of the inlet and outlet flange sealing surface of the spring loaded safety valve
Nominal diameter
Structural length multiple (mm)
Vertical deviation
± 302
Figure 32.3 Schematic diagram of the structural length and vertical deviation of the inlet and outlet flange sealing surface of the spring loaded safety valve
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