GB/T 24159-2022 PDF English (GB 24159-2009: Older version)

GB/T24159-2022 (GBT24159-2022): PDF in English

GB/T 24159-2022 NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 23.020.30 CCS J 74 Replacing GB/T 24159-2009 Welded insulated cylinders 焊接绝热气瓶 ISSUED ON. JULY 11, 2022 IMPLEMENTED ON. FEBRUARY 01, 2023 Issued by. State Administration for Market Regulation; Standardization Administration of the People's Republic of China. Table of Contents Foreword... 3  1 Scope... 5  2 Normative references... 5  3 Terms and definitions... 7  4 Symbols... 8  5 Model naming methods and basic parameters... 9  6 Materials... 10  7 Design... 11  8 Manufacturing... 17  9 Inspection methods... 25  10 Inspection rules... 29  11 Marking, packaging and transportation... 32  12 Exit-factory data... 33  13 Data preservation... 34  Annex A (normative) Maximum allowable filling coefficient... 35  Annex B (normative) Valve inlet and outlet joints... 37  Annex C (Normative) Safe discharge volume and discharge area... 40  Annex D (normative) Vibration test... 47  Annex E (normative) Drop test... 49  Annex F (informative) Product certification... 52  Annex G (informative) Batch inspection quality certificate... 55  Welded insulated cylinders 1 Scope This document specifies the symbols for welded insulated gas cylinders (hereinafter referred to as "cylinders"). It specifies cylinder model naming methods, basic parameters, materials, design, manufacturing, test methods, inspection rules, type test, marking, packaging, transportation, exit-factory data, data preservation and other requirements. This document is applicable to the refillable cylinders that are used under normal ambient temperature (-40℃~60℃), are used to store liquid oxygen, liquid nitrogen, liquid argon of which the nominal volume range is 10L~1000L, the nominal volume of LNG ranges from 150L to 1000L, that the design temperature is not higher than -196℃, and the nominal working pressure is 0.2MPa~3.5MPa. For cylinders storing liquid carbon dioxide and liquid nitrous oxide, the manufacture and inspection can be carried out with reference to this document. NOTE. All pressures not stated in this document refer to gauge pressure. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 228.1, Metallic materials - Tensile testing - Part 1.Method of test at room temperature GB/T 229, Metallic materials - Charpy pendulum impact test method GB/T 1804, General tolerances - Tolerances for linear and angular dimensions without individual tolerance indications GB/T 2653, Bend test methods on welded joints GB/T 7144, Coloured cylinder mark for gases GB/T 9251, Hydrostatic test method for gas cylinders GB/T 12137, Methods for leakage test of gas cylinders adiabatic process and the vacuuming process). 3.2 tare of cylinder The mass of the empty cylinder (for horizontal gas cylinder, it includes frame or support) that meets the basic functions of filling, storage, transportation, use and safety. 3.3 effective volume The maximum volume of liquid that the cylinder is allowed to fill. 3.4 heat transfer coefficient The amount of heat that can be transferred between hot and cold fluids in unit area, unit temperature difference, unit time, representing the strength of the heat transfer process. [Source. GB/T 18517-2012, 2.6.2, modified] 3.5 free air Air at an absolute pressure of 1.01325×105 Pa and a temperature of 15.6°C. 4 Symbols The following symbols apply to this document. Di. Inner diameter of head or cylinder body, mm. D0.Outer diameter of head or cylinder body, mm. E0.Elastic modulus of the material, MPa. g. Acceleration of gravity, g=9.81m/s2. Hi. Inner height of head, equal to the sum of the depth of the inner surface of the head and the height of the straight edge of the head, mm. hi. Depth of the inner surface of the head, mm. h0.Total height of the outer surface of the head, h0=hi+Sn; mm. k1.Coefficient determined by the ratio of the major and minor axes of the ellipse. L. Sum of the length of the cylinder, the height of the straight side of each head, and 1/3 of the depth of the inner surface, mm. P. Nominal working pressure, MPa. Pb. Design burst pressure of rupture disc, MPa. Pcr. Critical pressure, MPa. Pd. Design pressure, MPa. Pf. Discharge pressure of the safety valve or the design burst pressure of the rupture disc safety device, MPa. Pt. Pressure of withstand voltage test, MPa. Pz. Safety valve setting pressure, MPa. P1.External pressure, MPa. R. Outer radius of the spherical shell of the dish-shaped head and the outer radius of the equivalent spherical shell of the elliptical head, mm. S. Design wall thickness, mm. Sb. Measured minimum wall thickness of the cylinder, mm. Se. Effective thickness, equal to nominal wall thickness minus corrosion allowance and negative deviation of steel thickness, mm. Sh. Minimum wall thickness of the head after forming, mm. Sn. Nominal wall thickness, mm. σ. Wall stress, MPa. ΔHi. Height tolerance inside the head, mm. ΔπDi. Tolerance of the inner circumference of the head, mm. 5 Model naming methods and basic parameters 5.1 Model naming methods Vertical type is represented by "DPL". Horizontal type is represented by "DPW". The rest are named according to the method specified in GB/T 15384.When the design is changed, Roman numerals I, II, III, etc. can be added at the end of the model as serial numbers. 5.2 Basic parameters 5.2.1 Nominal volume and inner diameter of inner vessel The nominal volume and inner diameter of the inner vessel shall be selected according to Table 1.The nominal volume shall be an integer multiple of 5. 7.1.1 Composition 7.1.1.1 A cylinder is mainly composed of an inner vessel, an outer shell, a thermal insulation system, a connecting piece between the inner vessel and the outer shell, a valve piping system, a protection device for protecting the valve piping system, a base and so on. The valve piping system includes valves, instruments, safety relief devices, pipe fittings, pipes and pipe supports. The protective device shall be a protective cover, a protective circle (ring), a frame and so on. 7.1.1.2 The main body of the inner vessel shall not exceed three parts, that is, no more than one longitudinal weld and no more than two circumferential welds. 7.1.2 Connecting piece between inner vessel and outer shell The stress value of the connecting piece between the inner vessel and the outer shell shall not be greater than 2/3 of the material's normal temperature yield strength (or specified plastic extension strength) under the following independent loads. a) Vertical gas cylinders shall meet the following requirements. 1) The load perpendicular to the cylinder axis shall not be less than the product of the maximum mass and 2g; 2) The load along the vertical direction of the cylinder axis shall not be lower than the product of the maximum mass and 3g. b) Horizontal cylinders shall meet the following requirements. 1) The load perpendicular to the cylinder axis and parallel to the ground shall not be less than the product of the maximum mass and 2g; 2) The load along the cylinder axis shall not be less than the product of the maximum mass and 2g; 3) The load perpendicular to the cylinder axis and in the vertical direction shall not be less than the product of the maximum mass and 3g. NOTE. "Maximum mass" is the sum of the total mass of the medium (filling the saturated medium to the effective volume under standard atmospheric pressure), the mass of the inner vessel metal and the mass of the thermal insulation layer. 7.1.3 Performance indicators The leakage rate of vacuum interspace and the leakage rate of vacuum interspace are as specified in Table 4.The static evaporation rate with the nominal working pressure not greater than 2.4MPa is in accordance with the provisions of Table 4.The static evaporation rate with the nominal working pressure greater than 2.4MPa is in accordance with the requirements of the drawings. 7.4.2.1 The cross-sectional area of the relief pipeline connected to the safety pressure relief device shall not be less than the sum of the inlet area of the safety pressure relief device. It can ensure that the discharge capacity meets the safety discharge requirements of gas cylinders. 7.4.2.2 The inlet pipe of the safety pressure relief device shall be located at the top of the inner vessel. Its lowest point shall be located above the liquid level of 98% of the nominal volume. 7.4.3 Safety pressure relief device 7.4.3.1 The main safety pressure relief device and the auxiliary safety pressure relief device shall be arranged in parallel. The main safety pressure relief device shall use safety valves. The auxiliary safety pressure relief device of LNG is only allowed to use safety valves. The auxiliary safety pressure relief device for the rest of the medium shall be safety valve or bursting disc safety device. 7.4.3.2 The set pressure of the main safety relief device (safety valve) shall not be greater than 1.2 times the nominal working pressure (Pz≤1.2P). The discharge pressure shall meet the following requirements. a) In the case of C.1.1, the discharge pressure of liquid oxygen, liquid nitrogen and liquid argon cylinders shall not be greater than 1.1 times the set pressure; b) In the case of C.1.2, the discharge pressure of the LNG cylinder shall not be greater than 1.1 times the set pressure. 7.4.3.3 The auxiliary safety pressure relief device is only applicable to the situation of C.1.2.It shall meet the following requirements. a) When a safety valve is used, the set pressure is 1.4 times to 1.6 times the nominal working pressure (1.4P≤Pz≤1.6P). The discharge pressure shall not be greater than 1.1 times the set .......
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