标准编号:	GB/T 5842-2022
中文名称:	液化石油气钢瓶
英文名称:	Liquefied petroleum steel gas cylinders
中标分类:	J74    压力容器
行业分类:	GB    国家标准
ICS分类:	23.020.30 23.020.30    压力容器、气瓶 23.020.30
发布机构:	国家市场监督管理总局 国家标准化管理委员会
发布日期:	2022-03-09
实施日期:	2022-10-1
标准状态:	被替代
被新标准替代:	GB 5842-2023 液化石油气钢瓶
被替代日期:	2023-12-1
替代旧标准:	GB 5842-2006 液化石油气钢瓶
翻译语言:	英文
文件格式:	PDF
中文字符数:	27000 字
翻译价格(元):	1890.00 元
交付时间:	付款后 1 个工作日

Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.



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

液化石油气钢瓶
1 范围
本文件规定了液化石油气钢瓶(以下简称“气瓶”)的符号和说明，型式，材料，设计，制造，试验方法和检验规则，标志、包装、涂敷﹑贮运和出厂文件等要求。
本文件适用于设计、制造在正常环境温度(－40℃～60℃)下使用的，公称工作压力为2.1MPa，公称容积不大于150L，可重复盛装符合GB 11174 的液化石油气的钢质焊接气瓶。
2 规范性引用文件
下列文件中的内容通过文中的规范性引用而构成本文件必不可少的条款。其中，注日期的引用文件，仅该日期对应的版本适用于本文件；不注日期的引用文件，其最新版本(包括所有的修改单)适用于本文件。
GB/T 150.3 压力容器 第3部分：设计
GB/T 222 钢的成品化学成分允许偏差
GB/T 228.1 金属材料 拉伸试验 第1部分：室温试验方法
GB/T 1804 一般公差 未注公差的线性和角度尺寸的公差
GB/T 2651 焊接接头拉伸试验方法
GB/T 2653 焊接接头弯曲试验方法
GB/T 6653 焊接气瓶用钢板和钢带
GB/T 7144 气瓶颜色标志
GB/T 7512 液化石油气瓶阀
GB/T 8335 气瓶专用螺纹
GB/T 9251 气瓶水压试验方法
GB/T 9252 气瓶压力循环试验方法
GB/T 12137 气瓶气密性试验方法
GB/T 13005 气瓶术语
GB/T 15385 气瓶水压爆破试验方法
GB/T 17925 气瓶对接焊缝X射线数字成像检测
GB/T 33209 焊接气瓶焊接工艺评定
GB/T 35208 自闭式液化石油气瓶阀
CJ/T 33 液化石油气钢瓶热处理工艺评定
NB/T 47013.2 承压设备无损检测 第2部分：射线检测
TSG 23 气瓶安全技术规程
3 术语和定义
GB/T 13005界定的以及下列术语和定义适用于本文件。
3.1
最大充装 maximum filling weight
TSG 23规定的液化石油气充装系数与气瓶公称容积的乘积。
3.2
气瓶编号(瓶号) cylinder number
具有唯一性和可追溯性的气瓶产品编号。
4 符号和说明
下列符号适用于本文件(见表1)。
表1 符号和说明
符号 单位 说明
A80 ％ 断后伸长率
b mm 焊缝对口错边量
d mm 弯曲试验弯心直径
D mm 气瓶外直径
E mm 焊缝棱角高度
H mm 瓶体高度(系指两封头凸形端点之间的距离)
K — 封头形状系数
Pb MPa 水压爆破试验压力
Pe MPa 计算压力
ReL MPa 下屈服强度
Rm MPa 抗拉强度
Rma MPa 实测抗拉强度
S mm 瓶体设计壁厚
S0 mm 瓶体名义壁厚
S1 mm 筒体计算壁厚和封头直边部分计算壁厚
S2 mm 封头曲面部分计算壁厚
e mm 实测试样厚度
J — 焊缝系数
5 气瓶的型式
5.1 气瓶型号的表示方法
气瓶型号表示方法如下：

改型序号(用罗马字母表示)
特征参数(气瓶的公称容积，L)
表示液化石油气钢瓶
改型序号用来表示YSP系列中某一规格钢瓶的结构、阀座螺纹、瓶阀型号等发生了改变；如无改变，改型序号可不标注。
示例；YSP35.5表示35.5L液化石油气钢瓶。
5.2 气瓶型号和参数
气瓶应按照表2的规格进行设计和制造。
表2 常用钢瓶型号和参数
型号 参数 备注
气瓶外直径-公称外径/mm 公称容积/L 最大充装量/kg 封头形状系数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 用于气化装置的液化石油气储存设备
5.3 气瓶结构型式
气瓶的结构型式见图1。

标引序号说明：
1——底座；
2——下封头；
3——上封头；
4——阀座；
5——护罩；
6——瓶阀；
7——筒体；
8——液相管。
图1 结构型式
6 材料
6.1 一般规定
6.1.1 气瓶主体(指筒体、封头等受压元件)材料，应采用无时效镇静钢，具有良好的延展性和焊接性能；且应附带有材料质量证明书原件或者电子版二维码材料质量证明书。
6.1.2 气瓶制造单位应对主体材料按炉、罐号进行化学成分验证分析，按批号验证力学性能，经验证合格的材料应做材料标记。验证分析结果应与材料质量证明书相符，化学成分允许偏差应符合GB/T 222的规定。
6.1.3 焊在气瓶主体上的所有附件，应采用与主体材料焊接性能相适应的材料。
6.1.4 所采用的焊接材料焊成的焊缝，其抗拉强度不应低于母材抗拉强度规定值的下限。
6.1.5 材料(包括焊接材料)应符合相应标准的规定。
6.2 化学成分
主体材料的化学成分(质量分数)应符合表3的规定。
表3 主体材料的化学成分
化学元素 C Si Mn S P Nb Ti V Nb＋V Alt
质量分数 ≤0.20％ ≤0.35％ ≤0.7％～1.50％ ≤0.012％ ≤0.025％ ≤0.05％ ≤0.06％ ≤0.10％ ≤0.12％ ≥0.020％
6.3 力学性能
6.3.1 主体材料的力学性能应符合GB/T 6653的规定。
6.3.2 主体材料的屈强比(ReL/Rm)：当材料抗拉强度≥490MPa时，ReL/Rm应≤0.85，当材料抗拉强度＜490MPa时，ReL/Rm应≤0.75。
7 设计
7.1 一般规定
7.1.1 气瓶的设计文件应通过具有型式试验资质的气瓶检验机构的设计文件鉴定。
7.1.2 气瓶瓶体由两部分组成时，应只有一条环焊缝，采用锁底接头装配；气瓶瓶体由三部分组成时，应有两条环焊缝和一条纵焊缝(纵焊缝不应有永久衬板)，封头和筒体采用缩口插入式装配。
7.1.3 设计计算钢瓶受压元件壁厚时，材料的强度参数应采用下屈服强度ReL。
7.1.4 气瓶封头形状应为椭圆形。
7.2 瓶体壁厚计算
7.2.1 筒体计算壁厚和封头直边部分计算壁厚S1按公式(1)计算。
(1)
式中：
Pe——计算压力，取Pe＝3.2MPa；
J——焊缝系数，有纵向焊缝取J＝0.9，无纵向焊缝取J＝1.0。
材料的下屈服强度应选用标准规定屈服强度的最小值。
7.2.2 封头曲面部分计算壁厚S2按公式(2)计算。
(2)
式中：
K——椭圆形封头形状系数。
材料的下屈服强度应选用标准规定屈服强度的最小值。
7.2.3 YSP118和YSP118-Ⅱ规格的筒体和封头设计壁厚分别按照公式(1)和公式(2)取值；其他规格瓶体设计壁厚S取公式(1)和公式(2)计算结果中的较大值。
7.2.4 瓶体设计壁厚除满足公式(1)和公式(2)的要求外，还应满足公式(3)的要求，且不应小于1.5mm。
(3)
7.2.5 气瓶筒体和封头的名义壁厚应相等。确定名义壁厚S0时应当考虑钢板的厚度负偏差和工艺减薄量。
7.3 附件
7.3.1 附件的设计应便于焊接和检验。
7.3.2 气瓶应配有用于保护瓶阀的护罩和保持气瓶稳定的底座。护罩和底座应焊接在瓶体上。护罩和底座的结构形状及其与气瓶的连接应防止积液，护罩应卷边制成圆弧状(容积小于12L的气瓶除外)，高度及直径尺寸可根据使用要求进行调整，底座应有通风孔和排液孔。
7.3.3 气瓶选用的瓶阀应符合GB/T 7512及GB/T 35208的规定，所选型号应在瓶阀型式试验证书覆盖范围内。
7.3.4 阀座螺纹应与瓶阀螺纹相匹配，并符合GB/T 8335的规定；气瓶气相阀座应选用PZ27.8锥螺纹，容积小于12L的气瓶阀座应选用PZ19.2锥螺纹，液相瓶阀座应选用PZ30.3或PZ39.0的锥螺纹。
7.3.5 瓶阀与阀座的螺纹连接应密封，密封材料应与所盛装的液化石油气不发生化学反应。
7.3.6 不应在筒体上开孔，应参照GB/T 150.3的要求进行开孔补强。带有液相管的气瓶，在封头上开孔时，沿封头的轴线垂直方向测量孔边缘与封头外圆周的距离，不宜小于瓶体外直径的10％。
8 制造
8.1 焊接工艺评定
8.1.1 焊接工艺评定按GB/T 33209规定执行。
8.1.2 进行焊接工艺评定的焊工和无损检测人员，应分别符合8.2.1和9.1.2的规定。
8.1.3 焊接工艺评定的焊缝，应能代表气瓶的受压元件的对接焊缝和角接焊缝。
8.1.4 焊接工艺评定应在气瓶的瓶体上进行。
8.1.5 焊接工艺评定的结果，应经过气瓶制造单位技术负责人审查批准，并存入企业的技术档案。
8.2 焊接
8.2.1 焊接气瓶的焊工应持有有效的特种设备资质证书。焊工代号应打在气瓶显著位置或在焊接记录上签字可追溯。
8.2.2 瓶体的对接焊缝和阀座角焊缝均应采用自动焊接方法施焊，且应严格遵守经评定合格的焊接工艺。
8.2.3 焊接坡口的形状和尺寸，应符合图样的规定。坡口表面应清洁、光滑，不应有裂纹、分层和夹渣等缺陷及其他残留物质。
8.2.4 焊接(包括焊接返修)应在室内进行，相对湿度不应大于90％，否则应采取有效措施。当焊接件温度低于0℃时，应在施焊处预热。
8.2.5 施焊时，不应在非焊接处引弧，纵焊缝应有引弧板和熄弧板，板长不应小于100mm。去除引、熄弧板时，不应敲击，应采用切除的方法，切除处应磨平。
8.3 焊缝
8.3.1 瓶体的对接焊缝和阀座角焊缝应焊透。
8.3.2 焊缝表面的外观应符合下列规定：
a)焊缝和热影响区不应有裂纹、气孔、弧坑、夹渣和未熔合等缺陷；
b)瓶体的焊缝不准许咬边，瓶体附件的焊缝在瓶体一侧不准许咬边；
c)焊缝表面不应有凹陷或不规则的突变；
d)焊缝两侧的飞溅物应清除干净；
e)瓶体对接焊缝的余高为0mm～2.5mm；同一焊缝最宽最窄处之差应不大于4mm；
f)当图样无规定时，角焊缝的焊脚高度不应小于焊接件中较薄者的厚度，其几何形状应圆滑过渡至母材表面。
8.4 焊缝的返修
8.4.1 焊缝返修应有经评定合格的返修工艺，并应严格执行。
8.4.2 返修处应重新进行外观和射线检查并合格。
8.4.3 焊缝同一部位允许返修一次。
8.4.4 返修部位应记入产品生产检验记录。
8.5 筒体
8.5.1 筒体由钢板卷焊而成时，钢板的轧制方向应与筒体的环向一致。
8.5.2 筒体焊接成形后应符合下列要求：
a)筒体同一横截面最大最小直径差不大于0.01D；
b)筒体纵焊缝对口错边量b不大于0.1S0(图2)；
c)用长度为D/2，且小于300mm的样板测量，筒体纵焊缝棱角高度E应不大于0.1S0＋2mm(图3)。