SY/T 4102-2024 Code for inspection and installation of valve English, Anglais, Englisch, Inglés, えいご
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ICS
E
Professional standard of the People's Republic of China
SY/T 4102-2024
Replaces SY/T 4102-2013
Code for inspection and installation of valve
阀门检验与安装规范
(English Translation)
Issue date: 2024-09-24 Implementation date: 2025-03-24
Issued by National Development and Reform Commission, P.R.C
Contents
1 General provisions
2 Terms
3 Valve arrival inspection
3.1 General requirement
3.2 Visual inspection
3.3 Inspection and test of actuator
4 Valve test
4.1 General requirement
4.2 Shell test
4.3 Back seal test
4.4 Closure test
4.5 Relief valve operation test
4.6 Other valve operation test
5 Valve storage
6 Valve installation
6.1 General requirement
6.2 Installation
6.3 Inspection and protection after installation
7 Project handover
Explanation of wording in this code
List of quoted standards
Addition: Explanation of provisions
1 General Provisions
1.0.1 This code is formulated to regulate the receiving inspection, testing, storage, handling, and installation of valves used in petroleum and natural gas industry construction projects, and to ensure the installation quality of valves.
1.0.2 This code applies to the receiving inspection, testing, storage, handling, and installation of general-purpose valves for oil and gas field surface construction projects, oil and gas storage and transportation projects, and refining and chemical construction projects. This code does not apply to the receiving inspection, testing, storage, handling, and installation of instrument valves.
1.0.3 When design documents or valve technical specifications have special requirements for inspection and testing, those special requirements shall be followed.
1.0.4 During the processes of receiving inspection, testing, storage, handling, and installation of valves, in addition to complying with the provisions of this code, the requirements of current relevant national standards shall also be met.
2 Terms
2.0.1 shell test
A test conducted on the valve shell according to specified test media and test pressure.
Note: Includes the opening and closing drive mechanisms affected by the medium pressure within the valve itself and connected to internal valve components.
2.0.2 closure test
A test conducted on the sealing performance of the valve closure member sealing pair according to specified test media and test pressure.
2.0.3 back seal test
A test conducted on the sealing performance of the valve back seat sealing structure according to specified test media and test pressure.
2.0.4 test pressure
The gauge pressure exerted by the test medium inside the valve cavity during the valve test.
2.0.5 test medium
The liquid or gas filled into the valve cavity and subjected to pressure during the test.
2.0.6 set pressure
The predetermined pressure at which a safety valve begins to open under operating conditions.
Note: This pressure is the gauge pressure measured at the valve inlet at which, under specific operating conditions, the force causing the valve to open due to medium pressure balances the force holding the disc against the seat.
2.0.7 cold working pressure
The maximum allowable working pressure of the valve shell at operating temperatures between -20°C and 38°C.
2.0.8 design differential pressure
The maximum allowable pressure difference between the inlet and outlet ends of the medium when the valve is in the closed position.
Note: For valves of certain structures, the design differential pressure may be less than the cold working pressure.
3 Receiving Inspection of Valves
3.1 General Provisions
3.1.1 Valve quality certification documents shall comply with current relevant national standards and design document provisions, and shall include the following:
1 Name of the manufacturer, production license number, and date of manufacture.
2 Product name, design material code or material code, specification and model.
3 Material certification documents for main pressure-bearing components of the valve.
4 Nominal pressure, nominal diameter, applicable medium, and temperature.
5 Product implementation standards, inspection conclusions, and inspection date.
6 Product serial number and other markings specified in the contract.
7 Manuals for valves with special design requirements or special structures.
8 Valve inspection and test documents. When required by design documents or relevant safety supervision regulations, valve inspection certificates shall also be included.
9 Signature/seal of the inspector and inspection seal of the manufacturer.
10 Material and test documents with special provisions in technical documents.
11 Valve type test certificates required by the current national standard "Type Test Rules for Pressure Pipeline Components" TSG D7002.
12 Factory qualification certificate.
3.1.2 Materials for the valve body, packing, gaskets, etc., shall comply with the provisions of current relevant national product standards.
3.1.3 The handles, handwheels, and actuators of valves shall operate smoothly.
3.1.4 For refining and chemical construction projects, valves made of chromium-molybdenum alloy steel, nickel-containing low-temperature steel, stainless steel, nickel and nickel alloys, titanium and titanium alloys, zirconium and zirconium alloys shall undergo sampling inspection of the main alloying element content of the valve body, bonnet, and their connecting bolts using spectral analysis or other methods, and an analysis report shall be issued. Sampling inspection shall comply with the following provisions:
1 For pipelines with inspection level I, the sampling quantity per batch shall be 10%, and not less than 1 piece.
2 For other pipelines, the sampling quantity per batch shall be 5%, and not less than 1 piece.
3 If one piece in the sampling inspection fails, the entire inspection batch represented by that sampling shall be deemed unqualified, or each valve in the batch shall be inspected individually, and qualified ones may still be used.
4 Inspected valves shall be properly recorded and marked.
3.1.5 For oil and gas field surface construction projects and oil and gas storage and transportation projects, alloy steel valves shall undergo sampling inspection of the main alloying element content of the valve body, bonnet, and their connecting bolts using spectral analysis or other methods, and an analysis report shall be issued. 5% of each batch shall be sampled, and not less than one piece. If any sample fails, double the number of samples shall be inspected. If there is still a failure, the batch of material shall not be used.
3.1.6 For valves requiring intergranular corrosion tests or fire tests as per design documents, the quality certification documents shall include corresponding test reports.
3.1.7 Material certification documents for anti-hydrogen sulfide valves shall include inspection results for various specific technical requirements specified in the contract. If design documents require hydrogen-induced cracking (HIC) and sulfide stress cracking/stress corrosion cracking (SSC/SCC) tests, relevant inspection results shall be provided.
3.1.8 Valves used for oxygen pipelines shall be inspected according to the provisions of the current national standards "Technical specification of valves for oxygen service" JB/T 12955, "Oxygen globe valves" JB/T 10530, "Oxygen butterfly valves" JB/T 14318, "Oxygen ball valves" JB/T 14319, "Oxygen check valves" JB/T 14320, and shall bear a dedicated acceptance mark.
3.1.9 Inspection of low-temperature valves shall comply with the provisions of the current national standard "Low temperature valves — Technical specifications" GB/T 24925, in addition to the provisions for conventional valves. For valves requiring low-temperature sealing tests as per design, the manufacturer shall provide a certificate of compliance for the low-temperature sealing test.
3.1.10 For low-temperature valves, valves for extremely hazardous media, and valves with a design pressure greater than or equal to 10 MPa, their welds and pressure-bearing parts such as body and bonnet shall have certificates of compliance for non-destructive testing as specified by relevant standards.
3.1.11 For the welding bevels of butt-weld connection valves, surface non-destructive testing shall be carried out according to the following provisions. The test results shall comply with Level I of the current national standard "Nondestructive testing of pressure equipments — Part 4: Magnetic particle testing" NB/T 47013.4 or Level I of "Nondestructive testing of pressure equipments — Part 5: Penetrant testing" NB/T 47013.5:
1 Bevels of steel with a specified minimum tensile strength greater than or equal to 540 MPa and chromium-molybdenum alloy steel shall undergo 100% testing.
2 For non-austenitic stainless steel bevels with a design temperature below -29°C, the sampling quantity per batch shall be 5%, and not less than 1 piece.
3.1.12 Valves with anti-static structures shall undergo anti-static charge accumulation testing. When the power supply voltage for the dry valve test does not exceed 12V, the electrostatic circuit resistance between the stem, body, and disc shall be less than 10Ω. 10% of each batch shall be sampled, and not less than 1 unit.
3.2 Visual Inspection
3.2.1 The valve body shall bear the manufacturer's nameplate. The nameplate shall indicate the nominal diameter, nominal pressure, applicable temperature, applicable medium, manufacturer's name, date of manufacture, product model, valve body material grade, manufacturing standard, product number, design material code, and permit mark. The nameplate of safety valves shall indicate the valve's design limiting operating temperature, set pressure, rated displacement coefficient or rated displacement for the reference fluid, flow area or flow diameter, minimum opening height, and set tolerance percentage. Other relevant markings on the valve body shall be correct, complete, and clear, and shall comply with the provisions of the current national standard "Industrial valves — Marking" GB/T
