GB/T 5842-2022 in English

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This document is developed in accordance with the rules given in GB/T 1.1-2020 Directives for standardization—Part 1: Rules for the structure and drafting of standardizing documents.

This document replaces GB/T 5842-2006 Liquefied petroleum gas cylinders. In addition to structural adjustment and editorial changes, the following main technical changes have been made with respect to GB/T 5842-2006:

a) The definitions of assure value of mechanical properties after heat treatment and small capacity cylinders are deleted (see Clause 3 of Edition 2006);

b) Some symbol requirements are modified (see Clause 4 hereof; Clause 4 of Edition 2006);

c) Some cylinder models and parameters are added (see 5.2 hereof; 5.2 of Edition 2006);

d) The requirements for the chemical composition of the main material are modified (see 6.2 hereof; 6.2 of Edition 2006);

e) The calculation equation of cylinder body wall thickness is modified (7.2 hereof; 7.2 of Edition 2006);

f) The requirements that “the design wall thickness of cylinder body and head of YSP118 and YSP118-II specifications shall be based on the equation respectively” are added (see 7.2.3 hereof);

g) The requirements for cylinder thread dimensions and directions are added (see 7.3.4 hereof);

h) The requirements for hole reinforcement are added (see 7.3.6 hereof);

i) The welding procedure qualification is modified to comply with GB/T 33209 (see 8.1.1 hereof; 8.1.1 of Edition 2006);

j) Heat treatment requirements are added and refined (see 8.8 hereof; 8.8 of Edition 2006);

k) The criteria and requirements for the qualification of radiographic testing are modified (see 9.1.5 hereof; 9.1.5 of Edition 2006);

l) The requirement to measure the weight and volume of gas cylinders on a one-by-one basis is deleted (see 9.2.1 hereof; 9.2.1.5 of Edition 2006);

m) The requirements for hydrostatic test equipment are added (see 9.2.2.1 hereof);

n) The holding time of hydrostatic test and air tightness test is modified to 30s (see 9.2.2.2 and 9.2.3.3 hereof; 9.2.2.2 and 9.2.3.3 of Edition 2006);

o) The number of lots are modified from 1,002 to 2,000 (see 9.3.1 hereof; 9.3.1 of Edition 2006);

p) The measured tensile strength values are modified (see 9.3.3.5.2 hereof; 9.3.3.5.2 of Edition 2006);

q) Hydraulic burst test requirements are modified (see 9.3.4 hereof; 9.3.4 of Edition 2006);

r) The sampling ratios for dimension inspection of head and cylindrical shell and weight and volume inspection of gas cylinder (see 9.3.5 and 9.3.6 hereof; Table 6 of Edition 2006);

s) The fatigue test requirements are added (see 9.4 hereof);

t) The type test requirements are modified, and the type test items and sampling requirements are added (see 9.6 hereof; 9.5 of Edition 2006);

u) The items of individual inspection, batch inspection and type test in Table 7 are modified (see Table 7 hereof; Table 6 of Edition 2006);

v) The requirements for concave marking of head and engraved cylinder number of shield are added (see 10.1.2 and 10.1.4 hereof);

w) The font height requirements of the shield are modified (see 10.1.3 hereof; 10.1.2 of Edition 2006);

x) The requirements for traceability system of the gas cylinder are added (see 10.1.4 hereof);

y) The height of the font coated on the surface is modified, and the requirements for the paint color of the gas cylinder are added (see 10.2.2 hereof; 10.2.2 of Edition 2006).

This document is prepared with reference to ISO 22991:2004 Gas cylinders—Transportable refillable welded steel cylinders for liquefied petroleum gas (LPG)—Design and construction, and is not equivalent to ISO 22991:2004.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights.

This document was proposed by and is under the jurisdiction of the National Technical Committee on Gas Cylinder of Standardization Administration of China (SAC/TC 31).

The previous editions of this document and standards replaced by this document are as follows:

——It was first issued in 1980 as CJ 3-1-1980;

——It was issued in 1986 as GB 5842-1986, and first revised in 1996;

——In the second revision in 2006, the contents of GB 15380-2001 Liquefied petroleum gas steel mini-cylinders were incorporated (GB 15380-1994 is the previous edition of GB 15380-2001);

——This is the third revision.

Liquefied petroleum steel gas cylinders

1 Scope

This document specifies the symbols and interpretations, type, material, design, manufacturing, test method and inspection rules, marking, packaging, coating, storage and transportation, factory documents and other requirements of liquefied petroleum steel gas cylinders (hereinafter referred to as “gas cylinders").

This document is applicable to the design and manufacture of steel welded gas cylinders for use at normal ambient temperature (-40°C to 60°C), nominal working pressure of 2.1 MPa, nominal volume of not greater than 150L, and can be repeatedly filled with liquefied petroleum gas conforming to GB 11174.

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 150.3 Pressure vessels—Part 3: Design
GB/T 222 Permissible tolerances for chemical composition of steel products
GB/T 228.1 Metallic materials—Tensile testing—Part 1: Method of test at room temperature
GB/T 1804 General tolerances—Tolerances for linear and angular dimensions without individual tolerance indications
GB/T 2651 Tensile test method on welded joints
GB/T 2653 Bend test methods on welded joints
GB/T 6653 Steel plates and strips for welded gas cylinders
GB/T 7144 Coloured cylinder mark for gases
GB/T 7512 Valves for liquefied petroleum gas cylinders
GB/T 8335 Special threads for gas cylinders
GB/T 9251 Methods for hydrostatic test of gas cylinders
GB/T 9252 Method for pressure cycling test of gas cylinders
GB/T 12137 Methods for leakage test of gas cylinders
GB/T 13005 Terminology of gas cylinders
GB/T 15385 Method for hydraulic burst test of gas cylinder
GB/T 17925 Standard practice for X-ray digital radioscopic examination of cylinder weld
GB/T 33209 Welding procedure qualification for welded gas cylinders
GB/T 35208 Self-closing valves for LPG cylinders
 
CJ/T 33 Technological process evaluation of heat treatment for LPG cylinders
NB/T 47013.2 Nondestructive testing of pressure equipments—Part 2: Radiographic testing
TSG 23 Regulation on safety technology for gas cylinder

3 Terms and definitions

For the purposes of this document, the terms and definitions given in GB/T 13005 and the following apply.

3.1
maximum filling weight
product of the LPG filling factor specified in TSG 23 and the nominal volume of the gas cylinder

3.2
cylinder number
unique and traceable cylinder product number

4 Symbols and interpretations

The following symbols apply to this document (see Table 1).

Table 1 Symbols and explanations
Symbol Unit Explanation
A80 % Percentage elongation after fracture
b mm Unfitness of welds
d mm Bending center diameter in bending test
D mm Outside diameter of gas cylinder
E mm Height of weld corners
H mm Height of cylinder body (refers to the distance between convex ends of the heads at two ends)
K — Shape factor of head
Pb MPa Hydraulic burst test pressure
Pe MPa Calculated pressure
ReL MPa Lower yield strength
Rm MPa Tensile strength
Rma MPa Measured tensile strength
S mm Design wall thickness of cylinder body
S0 mm Nominal wall thickness of cylinder body
S1 mm Calculated wall thickness of cylindrical shell and straight edge of head
S2 mm Calculated wall thickness of curved surface of head
e mm Measured thickness of specimen
J — Weld factor

5 Type of gas cylinder

5.1 Designation of gas cylinder models

The gas cylinder model is designated as follows:


The modification serial number is used to indicate that the structure, value base thread and cylinder valve model of a certain specification cylinder in YSP series have been modified; if no modification has been made, the modification serial number may not be marked.

Example: YSP35.5 refers to 35.5L liquefied petroleum steel gas cylinders.

5.2 Types and parameters of gas cylinder

The gas cylinders shall be designed and manufactured according to the specifications in Table 2.

Table 2 Common types and parameters of gas cylinders
Model Parameter Remarks
Cylinder outside diameter - Nominal outside diameter/mm Nominal volume/L Maximum filling capacity/kg Shape factor of head K
YSP4.7 204 4.7 1.9 1.0 —
YSP12 249 12.0 5.0 1.0
YSP23.5 320 23.5 9.8 0.8
YSP26.2 300 26.2 11.0 1.0
YSP28.6 320 28.6 12.0 0.8
YSP29.8 300 29.8 12.5 1.0
YSP35.5 320 35.5 14.9 0.8
YSP118 407 118 49.5 1.0
YSP118-II 407 118 49.5 1.0 LPG storage equipment for gasification plant

 
5.3 Structural type of gas cylinder

See Figure 1 for the structural type of gas cylinder.

Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and interpretations
5 Type of gas cylinder
6 Material
7 Design
8 Manufacturing
9 Test methods and inspection rules
10 Marking, coating, packaging, storage and transportation, factory documents
11 Service life of gas cylinder
Annex A (Informative) Stamp marking of gas cylinder
Annex B (Informative) Cautions for safety use of gas cylinders
Annex C (Informative) Format of product certificate
Annex D (Informative) Format of quality certificate
Bibliography