SY/T 0556-2018 English PDF (SYT0556-2018)

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SY/T 0556-2018: Technical code for quick opening closure
SY/T 0556-2018
SY
OIL and 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
nomin...