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SY/T 0556-2018 PDF English (SY/T 0556-2010: Older version)Search result: SY/T 0556-2018 (SY/T 0556-2010 Older version)
SY/T0556-2018 (SYT0556-2018): PDF in EnglishSY/T 0556-2018 SY OIL & GAS INDUSTRY STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 75.180.99 E 98 Record No.: 65490-2018 Replacing SY/T 0556-2010 Technical Code for Quick Opening Closure ISSUED ON: OCTOBER 29, 2018 IMPLEMENTED ON: MARCH 01, 2019 Issued by: National Energy Administration Table of Contents Foreword ... 4 1 Scope ... 5 2 Normative References ... 5 3 Terms and Definitions ... 7 4 Basic Provisions ... 7 5 Basic Structure and Model ... 8 5.1 Basic structure ... 8 5.2 Model ... 10 6 Materials ... 11 7 Design ... 14 7.1 General provisions ... 14 7.2 Seal design ... 14 7.3 Structural design ... 14 7.4 Design of safety interlocking mechanism ... 15 7.5 Strength calculation ... 16 8 Manufacture and Inspection ... 16 8.1 General provisions ... 16 8.2 Parts processing ... 16 8.3 Welding ... 17 8.4 Non-destructive testing ... 18 8.5 Heat treatment ... 18 8.6 Assembly ... 19 9 Test ... 20 9.1 Pressure test ... 20 9.2 Air tightness test ... 20 9.3 Safety interlocking performance test ... 20 9.4 Opening and closing test ... 21 10 Marking ... 21 11 Exit-Factory Acceptance... 21 12 Coating, Packaging and Transportation ... 23 12.1 Coating ... 23 12.2 Packaging and transportation... 23 Bibliography ... 24 Technical Code for Quick Opening Closure 1 Scope This Standard specifies the basic requirements for the structure, material, design, manufacturing, inspection and acceptance, packaging and transportation of quick opening closure. This Standard is applicable to quick opening closure (hereinafter referred to as quick opening closure) with a design pressure less than or equal to 35MPa and a design temperature of -50°C~200°C for the onshore oil and gas industry. 2 Normative References The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) is applicable to this document. GB/T 150.1~150.4 Pressure Vessels GB/T 528 Rubber, Vulcanized or Thermoplastic - Determination of Tensile Stress- Strain Properties GB/T 713 Steel Plates for Boilers and Pressure Vessels GB/T 1047 Pipework Components - Definition and Selection of DN (Nominal Size) GB/T 1048 Pipework components - Definition and Selection of PN (Nominal Pressure) GB/T 1682 Rubber, Vulcanized - Determination of Low-temperature Brittleness - Single Test Piece Method GB/T 3452.1 Fluid Power Systems - O-Rings - Part 1: Inside Diameters, Cross- Sections, Tolerances and Size Identification Code GB/T 3452.3 Housing Dimensions for O-Ring Elastomer Seals in Hydraulic and Pneumatic Applications GB/T 3512 Rubber, Vulcanized or Thermoplastic--Accelerated Ageing and Heat Resistance Tests - Air-Oven Method Vessel TSG Z6002 Examination Rules for Welding Operators of Special Equipment TSG Z8001 Examination Rules for Non-Destructive Testing Inspectors of Special Equipment 3 Terms and Definitions For the purposes of this document, the following terms and definitions apply. 3.1 Quick opening closure A mechanical device that is used on the circular port of a pressure pipeline or pressure vessel and can be quickly opened or closed. It consists of a cylinder flange, head cover, hook ring or clamp, sealing ring, safety interlocking device, opening and closing mechanism, rotating arm and short section (when necessary), etc. 3.2 Quick opening closure for jaw-type (YQ-type) A quick opening closure that realizes quick opening or closing by disengaging or meshing between the hook ring and the teeth on the head cover. Jaw-type quick- opening closure is divided into integral type (when the hook ring and cylinder flange are made into one body) and split type (the structure is shown in Figure 1). 3.3 Quick opening closure for clip-type (KG-type) A quick-opening closure that realizes quick opening or closing by loosening or tightening the clamp (the structure is shown in Figure 2). 3.4 Quick opening closure for faucet-type (CK-type) A quick-opening closure that realizes quick opening or closing by intermittent single- head or multi-head thread rotation between the cylinder flange and the head cover (the structure is shown in Figure 3). 3.5 Quick opening closure for ring-type (YH-type) A quick opening closure between the cylinder flange and the head cover through the expansion or tightening of the lock ring mainly to withstand the compressive stress to achieve quick closing or opening (the structure is shown in Figure 4). 4 Basic Provisions 4.1 The nominal diameter of the quick opening closure shall comply with the provisions of GB/T 1047. When the nominal diameter is greater than 700mm, it should be selected in integer multiples of 100mm; the nominal pressure shall comply with the provisions of GB/T 1048. 4.2 In addition to meeting the strength, sealing performance and corrosion resistance required by the working conditions, the quick opening closure shall also be opened and closed flexibly and conveniently. 4.3 The quick opening closure shall be equipped with safety interlocking devices and warning signs shall be installed in appropriate positions, which shall meet the following requirements: a) When the quick opening closure reaches the predetermined closing position and the safety interlock device is in place, the equipment can only operate at a boost. b) When the internal pressure of the equipment is completely released and the safety interlock device is disengaged, the quick opening closure can be opened. 4.4 The inner diameter of the cylinder flange of the quick opening closure shall be consistent with the inner diameter of the connected cylinder. 4.5 The seal of the quick opening closure shall have good sealing performance during the service life. 4.6 The design service life of the quick opening closure shall be no less than the design service life of the belonging equipment. 4.7 The quick opening closure shall be equipped with an operating hand wheel or a special wrench to ensure flexible and convenient opening and closing. 4.8 The design, manufacture, inspection and acceptance of the quick opening closure shall also meet the relevant requirements of the equipment design documents. 4.9 The introduced quick opening closure shall meet the requirements of TSG 21 and this Standard. 5 Basic Structure and Model 5.1 Basic structure 5.1.1 The schematic diagram for the structure of quick opening closure for jaw-type is shown in Figure 1. b) When the design temperature is lower than -20 °C, the forging grade shall be no lower than Class III. c) When the working medium is extremely highly hazardous, the forging grade shall be no lower than Class III. d) When the tensile strength (Rm) of the forging is greater than or equal to 540MPa, the forging grade shall be no lower than Class III. e) When the nominal diameter DN is greater than or equal to 1000mm, the forging grade shall be no lower than Class III. 6.8 The steel plates for pressure components of quick opening closure shall comply with the relevant provisions of GB/T 713, GB/T 19189, GB/T 3531, and GB/T 24511. 6.9 The length of the steel pup joints welded to the cylinder flange shall be no less than 3 times the nominal thickness of the pup joint and no less than 300mm. When the nominal diameter is greater than or equal to 400mm, the pup joint should be rolled with steel plate; when the nominal diameter is less than 400mm, the pup joint should be made of seamless steel pipe. When the design pressure is greater than or equal to 4.0MPa, the pup joints shall be selected according to the requirements of GB/T 5310, GB/T 6479, and GB/T 9948. 6.10 The main pressure components such as cylinder flange, hook ring or clip, head cover, steel pup joint, etc., can be made of materials with different strength levels; but the material is required to have good weldability and toughness, and the yield strength ratio of the material should be less than or equal to 0.8. 6.11 The standard yield strength (Rel) of the cylinder flange or steel pub joint shall be the same or similar to the standard yield strength (Rel) of the cylinder material of the connected equipment and have good weldability. 6.12 When used in a wet hydrogen sulfide environment, the material of the pressure components in contact with the working medium shall also comply with relevant provisions of SY/T 0599. 6.13 The lock ring of the quick opening closure for ring-type should be made of high alloy steel. 6.14 Suitable materials shall be selected for the seals according to factors such as the working pressure, working temperature, working medium and design service life of the quick opening closure. 6.15 The material properties of rubber seals shall meet the requirements of Table 1 in addition to satisfying the corresponding standards and design documents. 6.16 Fasteners shall meet the special grade requirements specified in HG/T 20613 or 7.3.2 When the head cover of the quick opening closure is heavy, hydraulic or electric opening and closing methods should be adopted. 7.3.3 The quick opening closure for faucet-type shall be equipped with a head cover opening and start device; and the nominal diameter shall be no greater than 600mm. 7.3.4 When the locking ring of the quick opening closure for ring-type has a large opening and closing rigidity, it should be designed into a segmented structure. 7.3.5 The main components of the safety interlocking device shall be fixed on the head cover of the quick opening closure. 7.3.6 The quick opening closure shall be provided with a positioning device that can prevent accidental movement after the head cover is opened. 7.3.7 The opening and closing mechanism, and the pivoted arm of the quick opening closure shall be fixed on the cylinder flange of closure or the pub joint rather than fixed on t.......Source: https://www.ChineseStandard.net/PDF.aspx/SYT0556-2018 |