標(biāo)準(zhǔn)編號(hào):	GB/T 5099.3-2017
中文名稱:	鋼質(zhì)無(wú)縫氣瓶 第3部分：正火處理的鋼瓶
英文名稱:	Seamless steel gas cylinders―Part 3:Normalized cylinders
中標(biāo)分類(lèi):	J74    壓力容器
行業(yè)分類(lèi):	GB    國(guó)家標(biāo)準(zhǔn)
ICS分類(lèi):	23.020.30 23.020.30    壓力容器、氣瓶 23.020.30
發(fā)布機(jī)構(gòu):	中華人民共和國(guó)國(guó)家質(zhì)量監(jiān)督檢驗(yàn)檢疫總局 中國(guó)國(guó)家標(biāo)準(zhǔn)化管理委員會(huì)
發(fā)布日期:	2017-12-29
實(shí)施日期:	2019-1-1
標(biāo)準(zhǔn)狀態(tài):	superseded
被新標(biāo)準(zhǔn)替代:	GB/T 5099-1994 鋼質(zhì)無(wú)縫氣瓶
被替代日期:	1995-8-1
替代舊標(biāo)準(zhǔn):	GB/T 5099-1994 GB 5099-1994 鋼質(zhì)無(wú)縫氣瓶
翻譯語(yǔ)言:	英文
文件格式:	PDF
中文字符數(shù):	37000 字
翻譯價(jià)格(元):	1800.0
交付時(shí)間:	付款后 1 個(gè)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. GB/T 5099 Seamless steel gas cylinders is to be divided into the following 4 parts: ——Part 1: Quenched and tempered steel cylinders with tensile strength less than 1100 MPa; ——Part 2: Quenched and tempered steel cylinders with tensile strength more than or equal to 1100 MPa; ——Part 3: Normalized cylinders; ——Part 4: Seamless stainless steel gas cylinders. This is Part 3 of GB/T 5099. This part is developed in accordance with the rules given in GB/T 1.1-2009. This part replaces some contents given in GB/T 5099-1994 Seamless steel gas cylinders. The following main changes have been made with respect to GB/T 5099-1994: ——the scope of the standard is adjusted; a) the nominal working pressure is changed from 8 MPa ~ 30 MPa to no greater than 15 MPa; b) the nominal water capacity is changed from 0.4 L ~ 80 L to 0.5 L ~ 150 L; c) the service environment temperature is set at -20℃ ~ 60℃; d) the requirements for "cylinders not applicable to fire fighting" are deleted. ——the specification ranges of steel cylinders are expended: a) the requirements for diameter grading are deleted; b) the list of filling contents and the requirement for pressure grading are deleted. ——the calculation equation for design wall thickness is changed; ——the requirements for calculation of finite element at the bottom of the shell are deleted; ——the quantity of one batch is specified as "not greater than 500 plus the number of steel cylinders for destructive tests"; ——the metallographic examination of shells after heat treatment is changed to type test requirements; ——the requirements for tightness test for the bottom of steel cylinders made of seamless steel tubes are added; ——the contents “the volume deformation rate shall be tested by external measurement for the hydrostatic test” are required; ——the requirements for hardness inspection of the shells after heat treatment are deleted; ——the measured water capacity in the steel impression mark is changed to the nominal water capacity; ——the annex for assembly torque of cylinder valve is added; ——the annex for ultrasonic testing methods and evaluation is added; ——the annex for magnetic particle testing method and evaluation is added; ——the annex for flattening test method is added; ——the annex for description and evaluation of defects on inner and outer surfaces is added; This standard is redrafted by reference to and not equivalent to ISO 9809-3:2010 Gas cylinders - Refillable seamless steel gas cylinders - Design, construction and testing - Part 3: Normalized steel cylinders. 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 part 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 standard replaced by this part are as follows: ——GB 5099-1985 and GB/T 5099-1994. Seamless steel gas cylinders - Part 3: Normalized cylinders 1 Scope This part of GB/T 5099 specifies the type and parameters, technical requirements, test methods, inspection rules, marking, coating, packaging, transportation, storage, product certificate, and quality certificate for batch inspection of normalized or normalized and tempered steel seamless gas cylinders (hereinafter referred to as steel cylinders). This part is applicable to the design and manufacture of refillable steel cylinders with nominal working pressure not greater than 15 MPa, nominal water capacity of 0.5 L ~ 150 L and the environment temperature for use of -20℃~60℃, used to contain compressed gas or high-pressure liquefied gas. This part is not applicable to vehicle gas cylinders and cylinder-type pressure vessels attached to machinery and equipment. Note: the seamless steel gas cylinders with the nominal water capacity less than 0.5 L can also be manufactured and inspected with reference to this part. 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 196 General purpose metric screw threads - Basic dimensions (ISO 724) GB/T 197 General purpose metric screw threads - Tolerances (ISO 965-1) GB/T 222 Permissible tolerances for chemical composition of steel products GB/T 223 (all parts) Methods for chemical analysis of iron, steel and alloy GB/T 224 Determination of depth of decarburization of steels (ISO 3887) GB/T 228.1 Metallic materials - Tensile testing - Part 1: Method of test at room temperature (ISO 6892) GB/T 229 Metallic materials - Charpy pendulum impact test (ISO 148-1) GB/T 232 Metallic materials - Bend test (ISO 7438) GB/T 4336 Carbon and low-alloy steel - Determination of multi-element contents - Spark discharge atomic emission spectrometric method (routine method) GB/T 5777-2008 Seamless steel pipe and tubing methods for ultrasonic testing (ISO 9303:1989) GB/T 6394 Determination of estimating the average grain size of metal GB/T 7144 Coloured cylinder mark for gases GB/T 8335 Special threads for gas cylinders GB/T 836 Special thread gauges 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 13298 Inspection methods of microstructure for metals GB/T 13299 Steel - Determination of microstructure GB/T 13447 Steel blank for seamless gas cylinder GB/T 15384 Designation for gas cylinders GB/T 15385 Method for hydraulic burst test of gas cylinder GB/T 18248 Seamless steel tubes for gas cylinder JB/T 6065 Non-destructive testing - Shims for magnetic particle testing 3 Terms, definitions and symbols 3.1 Terms and definitions For the purposes of this standard, the terms and definitions specified in GB/T 13005 as well as the followings apply 3.1.1 yield stress stress value of the upper yield point in case of obvious yield; of the specified non-proportional extension of 0.2% in case of no obvious yield during tensile test of materials 3.1.2 normalizing heat treatment in which a cylinder is heated to a uniform temperature above the upper critical point, Ac3, of the steel and then cooled in still air 3.1.3 tempering toughening heat treatment which follows normalizing, in which the cylinder is heated to a uniform temperature below the lower critical point, Ac1, of the steel 3.1.4 batch quantity of steel cylinders with the same design, the same furnace number, the same manufacturing method and the same heat treatment specification for continuous heat treatment 3.2 Symbols For the purposes of this document, the following symbols apply. A Elongation after fracture, % C Circumferential tear length of the notch in shell bursting test, mm D Nominal outside diameter of the cylinder, mm Df Bending center diameter in cold bending test, mm; F Design stress factor (see Sub-clause 5.2.5) H Outside height of the convex bottom of steel cylinder, mm Lo Original gauge length of the flat test piece, mm Pb Measured burst pressure, MPa Ph Hydraulic test pressure, MPa Pw Nominal working pressure, MPa Py Measured yield pressure, MPa Re Minimum guaranteed yield stress of shell material after heat treatment, MPa Rca Measured value of the yield stress, MPa Rg Minimum guaranteed tensile strength of shell material after heat treatment, MPa Rm Measured value of the tensile strength, MPa S Design wall thickness of the steel cylinder, mm Sa Measured average wall thickness of the steel cylinder, mm So Original cross-sectional area of the flat test piece, mm2 S1 Design wall thickness of the center of cylinder bottom, mm S2 Design wall thickness of the concave bottom of steel cylinder, mm T Depth of artificial defect, mm V Nominal water capacity, L W Width of artificial defect, mm akV Impact value, J/cm2 a Original thickness of the arc flat test piece, mm b Original width of the flat test piece, mm h Outside height of the concave bottom of steel cylinder, mm l Length of the steel cylinder, mm r Inside knuckle radius of the end part and concave bottom of the steel cylinder, mm 4 Types and parameters 4.1 Types The steel cylinder shell shall meet the type shown in Figure 1. a) Three-core concave bottom b) Hot mount base c) Convex bottom d) H-shaped bottom e) Double mouth Figure 1 Structural type 4.2 Parameters The nominal water capacity and tolerance of the steel cylinder shall meet those specified in Table 1. ? Table 1 Nominal water capacity and tolerance of the steel cylinder Nominal water capacity/L Tolerance/% 0.5~2 ■(+20@0) 2~12 ■(+10@0) >12~150 ■(+5@0) 4.3 Model designation The naming of model of the steel cylinder shall meet the requirements of GB/T 15384.

Contents Foreword i 1 Scope 2 Normative references 3 Terms, definitions and symbols 4 Types and parameters 5 Technical requirements 6 Test methods 7 Inspection rules 8 Marking, coating, packaging, transportation and storage 9 Product certificate, and quality certificate for batch inspection Annex A (Informative) Assembly torque of cylinder valve Annex B (Normative) Ultrasonic testing Annex C (Normative) Magnetic particle testing Annex D (Normative) Flattening test methods Annex E (Informative) Description and evaluation of defects on inner and outer surfaces Annex F (Informative) Quality certificate for batch inspection of seamless steel gas cylinders

鋼質(zhì)無(wú)縫氣瓶 第3部分：正火處理的鋼瓶 1范圍 GB/T 5099的本部分規(guī)定了正火或正火后回火處理的鋼質(zhì)無(wú)縫氣瓶(以下簡(jiǎn)稱鋼瓶)的型式和參數(shù)、技術(shù)要求、試驗(yàn)方法、檢驗(yàn)規(guī)則、標(biāo)志、涂敷、包裝、運(yùn)輸、儲(chǔ)存、產(chǎn)品合格證和批量檢驗(yàn)質(zhì)量證明書(shū)。 本部分適用于設(shè)計(jì)、制造公稱工作壓力不大于15MPa，公稱水容積為0.5L~150L，使用環(huán)境溫度為-20℃~60℃，用于盛裝壓縮氣體或高壓液化氣體的可重復(fù)充裝的鋼瓶。 本部分不適用于車(chē)用氣瓶和機(jī)器設(shè)備上附屬的瓶式壓力容器。 注：對(duì)于公稱水容積小于0.5L的鋼質(zhì)無(wú)縫氣瓶也可參照本部分進(jìn)行制造及檢驗(yàn)。 2規(guī)范性引用文件 下列文件對(duì)于本文件的應(yīng)用是必不可少的。凡是注日期的引用文件，僅注日期的版本適用于本文件。凡是不注日期的引用文件，其最新版本(包括所有的修改單)適用于本文件。 GB/T 196普通螺紋 基本尺寸(ISO 724) GB/T 197普通螺紋 公差(ISO 965-1) GB/T 222鋼的成品化學(xué)成分允許偏差 GB/T 223(所有部分) 鋼鐵及合金化學(xué)分析方法 GB/T 224鋼的脫碳層深度測(cè)定法(ISO 3887) GB/T 228.1金屬材料 拉伸試驗(yàn) 第1部分：室溫試驗(yàn)方法(ISO 6892) GB/T 229金屬材料 夏比擺錘沖擊試驗(yàn)方法(ISO 148-1) GB/T 232金屬材料 彎曲試驗(yàn)方法(ISO 7438) GB/T 4336碳素鋼和中低合金鋼多元素含量的測(cè)定火花放電原子發(fā)射光譜法(常規(guī)法) GB/T 5777—2008無(wú)縫鋼管超聲波探傷檢驗(yàn)方法(ⅠSO9303：1989) GB/T 6394金屬平均晶粒度測(cè)定方法 GB/T 7144氣瓶顏色標(biāo)志 GB/T 8335氣瓶專(zhuān)用螺紋 GB/T 836氣瓶專(zhuān)用螺紋量規(guī) GB/T 9251氣瓶水壓試驗(yàn)方法 GB/T 9252氣瓶壓力循環(huán)試驗(yàn)方法 GB/T 12137氣瓶氣密性試驗(yàn)方法 GB/T 13005氣瓶術(shù)語(yǔ) GB/T 13298金屬顯微組織檢驗(yàn)方法 GB/T 13299鋼的顯微組織評(píng)定方法 GB/T 13447無(wú)縫氣瓶用鋼坯 GB/T 15384氣瓶型號(hào)命名方法 GB/T 15385氣瓶水壓爆破試驗(yàn)方法 GB/T 18248氣瓶用無(wú)縫鋼管 JB/T6065無(wú)損檢測(cè) 磁粉檢測(cè)用試片 3術(shù)語(yǔ)和定義、符號(hào) 3.1術(shù)語(yǔ)和定義 GB/T 13005界定的以及下列術(shù)語(yǔ)和定義適用于本文件 3.1.1 屈服強(qiáng)度 yield stress 對(duì)材料拉伸試驗(yàn)，呈明顯屈服現(xiàn)象時(shí)，取上屈服點(diǎn)；無(wú)明顯屈服現(xiàn)象的，取規(guī)定非比例延伸率為0.2%時(shí)的應(yīng)力。 3.1.2 正火 normalizing 把鋼瓶瓶體均勻加熱到鋼材上臨界點(diǎn)Ac3以上的溫度，然后在空氣中冷卻的熱處理方式。 3.1.3 回火 tempering 在正火后，把鋼瓶瓶體均勻加熱到鋼材下臨界點(diǎn)Ac1以下的某一溫度，保溫一定時(shí)間，然后冷卻到室溫。 3.1.4 批 batch 采用同一設(shè)計(jì)、同一爐罐號(hào)鋼、同一制造方法、同一熱處理規(guī)范進(jìn)行連續(xù)熱處理的鋼瓶所限定的數(shù)量。 3.2符號(hào) 下列符號(hào)適用于本文件。 A 斷后伸長(zhǎng)率，% C 瓶體爆破試驗(yàn)破口環(huán)向撕裂長(zhǎng)度，mm D 鋼瓶筒體公稱外徑，mm Df 冷彎試驗(yàn)彎心直徑，mm F 設(shè)計(jì)應(yīng)力系數(shù)(見(jiàn)5.2.5) H 鋼瓶凸形底部外高度，mm Lo 扁試樣的原始標(biāo)距，mm Pb 實(shí)測(cè)爆破壓力，MPa Pb 水壓試驗(yàn)壓力，MPa Pw 公稱工作壓力，MPa Py 實(shí)測(cè)屈服壓力，MPa Re 瓶體材料熱處理后的最小屈服強(qiáng)度保證值，MPa Rca 屈服強(qiáng)度實(shí)測(cè)值，MPa Rg 瓶體材料熱處理后的最小抗拉強(qiáng)度保證值，MPa Rm 抗拉強(qiáng)度實(shí)測(cè)值，MPa S 鋼瓶筒體設(shè)計(jì)壁厚，mm Sa 鋼瓶筒體實(shí)測(cè)平均壁厚，mm S0 扁試樣的原始橫截面積，mm2 S1 鋼瓶底部中心設(shè)計(jì)壁厚，mm S2 鋼瓶凹形底部接地點(diǎn)設(shè)計(jì)壁厚，mm T 人工缺陷深度，mm V 公稱水容積，L W 人工缺陷寬度，mm akV 沖擊值，J/cm㎡ a 弧形扁試樣的原始厚度，mm b 扁試樣的原始寬度，mm h 鋼瓶凹形底部外高度，mm l 鋼瓶筒體長(zhǎng)度，mm r 鋼瓶端部及凹形底部?jī)?nèi)轉(zhuǎn)角處半徑，mm 4型式和參數(shù) 4.1型式 鋼瓶瓶體一般應(yīng)符合圖1所示的型式。 a)三心凹底 b)熱裝底座 c)凸型底 d)H型底 e)雙瓶口 圖1結(jié)構(gòu)型式 4.2參數(shù) 鋼瓶的公稱水容積及允許偏差應(yīng)符合表1的規(guī)定。 表1鋼瓶的公稱水容積及允許偏差 公稱水容積/L 允許偏差/% 0.5~2 +20 0 2~12 +10 0 >12~150 +5 0 4.3型號(hào)標(biāo)記 鋼瓶的型號(hào)命名方法應(yīng)符合GB/T 15384的規(guī)定。 5技術(shù)要求 5.1瓶體材料 5.1.1一般要求 5.1.1.1應(yīng)采用電爐或吹氧轉(zhuǎn)爐冶煉的無(wú)時(shí)藏性鎮(zhèn)靜鋼。 5.1.1.2鋼瓶的瓶體材料應(yīng)選用優(yōu)質(zhì)碳錳鋼。 5.1.1.3鋼瓶的瓶體材料應(yīng)符合相關(guān)標(biāo)準(zhǔn)的規(guī)定，并有質(zhì)量合格證明書(shū)原件或加蓋材料供應(yīng)單位檢驗(yàn)公章和經(jīng)辦人章的復(fù)印件，鋼瓶制單位應(yīng)按爐罐號(hào)對(duì)材料進(jìn)行化學(xué)成分驗(yàn)證分析。 5.1.1.4鋼瓶瓶體材料的化學(xué)成分限定見(jiàn)表2，其允許偏差應(yīng)符合GB/T 22的規(guī)定。 表2鋼瓶瓶體材料化學(xué)成分(質(zhì)量分?jǐn)?shù)) 元素 鋼種 碳錳鋼 C ≤0.38% Si 0.10%~0.35% Mn 1.35%~1.75% S ≤0.020% P ≤0.020% S+P ≤0.030% 5.1.2鋼坯 5.1.2.1鋼坯的形狀尺寸和允許偏差應(yīng)符合GB/T 13447有關(guān)規(guī)定。 5.1.2.2鋼的低倍組織不允許有白點(diǎn)、殘余縮孔、分層、氣泡、異物和夾雜；中心疏松不大于1.5級(jí)，偏析不大于2.5級(jí)。 5.1.3無(wú)縫鋼管 5.1.3.1無(wú)縫鋼管的尺寸外形、內(nèi)外表面質(zhì)量和允許偏差應(yīng)符合GB/T 18248規(guī)定。 5.1.3.2無(wú)縫鋼管應(yīng)由鋼廠按GB/T 577—2008的規(guī)定逐根進(jìn)行縱向和橫向超聲波探傷檢驗(yàn)，應(yīng)符合該標(biāo)準(zhǔn)L2級(jí)的規(guī)定。 5.2設(shè)計(jì) 5.2.1一般要求 5.2.1.1筒體的壁厚設(shè)計(jì)應(yīng)取用材料熱處理后的最小屈服強(qiáng)度保證值Re。 5.2.1.2設(shè)計(jì)計(jì)算所選用的最小屈服強(qiáng)度保證值Re，不得大于最小抗拉強(qiáng)度保證值Rg的75%。 5.2.1.3鋼瓶的水壓試驗(yàn)壓力Ph至少應(yīng)為公稱工作壓力的1.5倍。鋼瓶的許用壓力不得超過(guò)水壓試驗(yàn)壓力Ph的0.8倍。 5.2.1.4瓶體材料正火或正火后回火處理的最大抗拉強(qiáng)度應(yīng)小于800MPa。 5.2.2壁厚設(shè)計(jì) 筒體的設(shè)計(jì)壁厚S應(yīng)按式(1)計(jì)算后向上圓整至少保留一位小數(shù)，同時(shí)應(yīng)符合式(2)的要求，且不得小于1.5mm。 （1） 式中，F(xiàn)≤0.85。 （2） 5.2.3端部設(shè)計(jì) 5.2.3.1鋼瓶凸形端部結(jié)構(gòu)一般如圖2所示，其中a)、b)、d)、e)是底部形狀，c)和f)是肩部形狀。 5.2.3.2鋼瓶凸形端部與筒體連接部位應(yīng)圓滑過(guò)渡，其厚度不得小于筒體設(shè)計(jì)壁厚S，凸形端部?jī)?nèi)轉(zhuǎn)角半徑r應(yīng)不小于0.075D，凸形底部中心設(shè)計(jì)壁厚S1應(yīng)符合下列要求： a)當(dāng)0.2≤H/D<0.4時(shí)，S1≥1.5S； b)當(dāng)H/D≥0.4時(shí)，S1≥S。 說(shuō)明： 1—鋼瓶筒體。 圖2凸形底部及肩部結(jié)構(gòu)示意圖 5.2.3.3當(dāng)鋼瓶設(shè)計(jì)采用凹形底部結(jié)構(gòu)(見(jiàn)圖3)時(shí)，設(shè)計(jì)尺寸應(yīng)符合下列要求： a)S1≥2S； b)S2≥2S； c)r≥0.075D； d)h≥0.12D。 圖3凹形底部結(jié)構(gòu)示意圖 5.2.3.4鋼瓶凹形底部的環(huán)殼與筒體之間應(yīng)有過(guò)渡段，過(guò)渡段與筒體的連接應(yīng)圓滑過(guò)渡，其厚度不得小于筒體設(shè)計(jì)壁厚S。 5.2.3.5凹形底鋼瓶直立時(shí)接地點(diǎn)外圓直徑應(yīng)不小于0.75D，以保證氣瓶直立時(shí)的穩(wěn)定性。 5.2.3.6鋼瓶制造單位應(yīng)通過(guò)水壓爆破試驗(yàn)和疲勞試驗(yàn)來(lái)驗(yàn)證端部設(shè)計(jì)是合理的。 5.2.4瓶口設(shè)計(jì) 5.2.4.1鋼瓶瓶口螺紋一般應(yīng)采用錐螺紋，錐螺紋應(yīng)符合GB/T 8335或相關(guān)標(biāo)準(zhǔn)的規(guī)定，有效螺紋扣數(shù)不少于8扣，12L及以下的鋼瓶有效螺紋不少于7扣。如果采用普通螺紋，普通螺紋尺寸及公差應(yīng)符合GB/T 196和GB/T 197或相關(guān)標(biāo)準(zhǔn)的要求，有效螺紋數(shù)在鋼瓶水壓試驗(yàn)壓力ph下計(jì)算的剪切安全系數(shù)應(yīng)至少為10，且不少于6扣。 5.2.4.2鋼瓶瓶口的厚度，應(yīng)保證有足夠的強(qiáng)度，以保證瓶口在承受上閥力矩和鉚合頸圈的附加外力時(shí)不產(chǎn)生塑性變形。 5.2.5底圈設(shè)計(jì) 鋼瓶設(shè)計(jì)帶有底圈結(jié)構(gòu)時(shí)，應(yīng)保證底圈具有足夠的強(qiáng)度，且底圈材料應(yīng)與瓶體材料相容。底圈形狀應(yīng)為圓筒狀并能保證鋼瓶的穩(wěn)定性。底圈與瓶體的連接不得使用焊接方法，其結(jié)構(gòu)不得造成積水。 5.2.6頸圈設(shè)計(jì) 鋼瓶設(shè)計(jì)帶有頸圈時(shí)，應(yīng)保證頸圈具有足夠的強(qiáng)度，且頸圈材料應(yīng)與瓶體材料相容。頸圈與瓶體的連接不得使用焊接方法。頸圈的軸向拉脫力應(yīng)不小于10倍的空瓶重且不小于1000N，抗轉(zhuǎn)動(dòng)扭矩應(yīng)不小于100N·m。 5.3制造 5.3.1一般要求 5.3.1.1鋼瓶制造應(yīng)符合本部分和產(chǎn)品圖樣及相關(guān)技術(shù)文件的規(guī)定。 5.3.1.2鋼瓶瓶體一般采用下列制造方法： a)以鋼坯為原料，經(jīng)沖拔拉伸、收口制成，簡(jiǎn)稱沖拔瓶； b)以無(wú)縫鋼管為原料，經(jīng)收底、收口制成，簡(jiǎn)稱管制瓶。 5.3.1.3鋼瓶瓶體制造前應(yīng)按材料的爐罐號(hào)對(duì)化學(xué)成分進(jìn)行分析驗(yàn)證，分析方法按GB/T 223或GB/T 4336執(zhí)行，結(jié)果應(yīng)符合5.1要求。 5.3.1.4鋼瓶不允許作焊接處理。管制瓶底部?jī)?nèi)表面的裂紋、夾雜、未熔合等缺陷，應(yīng)采用機(jī)械銑削等方法去除。 5.3.1.5對(duì)瓶體的表面缺陷允許采用專(zhuān)用工具進(jìn)行修磨，修磨坡度不大于1：3。 5.3.2組批 制造應(yīng)按批管理，每批數(shù)量不大于500只加上破壞性試驗(yàn)用瓶數(shù)。 5.3.3熱處理 鋼瓶瓶體應(yīng)進(jìn)行整體熱處理，熱處理應(yīng)按經(jīng)評(píng)定合格的正火或正火后回火處理工藝進(jìn)行。 5.3.4無(wú)損檢測(cè) 鋼瓶瓶體熱處理后應(yīng)逐只進(jìn)行無(wú)損檢測(cè)。 5.3.5水壓試驗(yàn) 鋼瓶瓶體應(yīng)逐只進(jìn)行水壓試驗(yàn)，水壓試驗(yàn)后應(yīng)進(jìn)行內(nèi)表面干燥處理，不得有殘留水漬。 5.3.6瓶口螺紋 鋼瓶瓶口螺紋的牙型、尺寸和公差，應(yīng)符合GB/T 8335或相關(guān)標(biāo)準(zhǔn)的規(guī)定。 5.3.7附件 5.3.7.1根據(jù)充裝氣體的性質(zhì)選配相應(yīng)的瓶閥，錐螺紋瓶閥、普通螺紋瓶閥裝配扭矩參見(jiàn)附錄A中表A.1、表A.2的要求控制。 5.3.7.2鋼瓶一般應(yīng)配瓶帽或護(hù)罩岀廠，瓶帽或護(hù)罩型式分固定式或可卸式，可用金屬或樹(shù)脂材料制成，并能夠抵抗外力的沖擊。 5.3.7.3采用螺紋連接的附件，牙型、尺寸和公差應(yīng)符合GB/T 8335或相關(guān)標(biāo)準(zhǔn)的規(guī)定。 6試驗(yàn)方法 6.1壁厚和制造公差 6.1.1瓶體厚度應(yīng)采用超聲波測(cè)厚儀測(cè)量。 6.1.2瓶體制造公差用標(biāo)準(zhǔn)量具或?qū)Ｓ玫牧烤摺影暹M(jìn)行檢驗(yàn)，檢驗(yàn)項(xiàng)目包括筒體的平均外徑、圓度垂直度和直線度。 6.2底部密封性試驗(yàn) 采用適當(dāng)?shù)脑囼?yàn)裝置對(duì)瓶體底部?jī)?nèi)表面中心區(qū)加壓，加壓面積應(yīng)至少為瓶體底部面積的1/16，且加壓區(qū)域直徑至少為20mm，試驗(yàn)介質(zhì)可為潔凈的空氣或氮?dú)狻＜訅旱矫芊庑栽囼?yàn)壓力后，保壓至少min，保壓期間應(yīng)觀察瓶體底部中心區(qū)域是否泄漏。 6.3內(nèi)、外表面 目測(cè)檢查，內(nèi)表面檢查應(yīng)有足夠的光照，可借助于內(nèi)窺鏡或適當(dāng)?shù)墓ぞ哌M(jìn)行檢查。 6.4瓶口內(nèi)螺紋 目測(cè)和用量規(guī)檢查。錐螺紋按GBT8335和GB/T 8336或相關(guān)標(biāo)準(zhǔn)檢查，普通螺紋按GB/T 196和GB/T 197或相關(guān)標(biāo)準(zhǔn)檢查。 6.5無(wú)損檢測(cè) 無(wú)損檢測(cè)可采用在線自動(dòng)超聲檢測(cè)或在線自動(dòng)磁粉檢測(cè)。超聲檢測(cè)按附錄B執(zhí)行；磁粉檢測(cè)按附錄C執(zhí)行。 6.6水壓試驗(yàn) 水壓試驗(yàn)采用外測(cè)法進(jìn)行容積變形率測(cè)試，按GB/T 9251執(zhí)行。 6.7氣密性試驗(yàn) 氣密性試驗(yàn)按GB/T 12137執(zhí)行。 6.8瓶體熱處理后各項(xiàng)性能指標(biāo)測(cè)定。 6.8.1取樣 6.8.1.1試樣的截取部位如圖4所示，其中拉伸試驗(yàn)試樣應(yīng)沿筒體成180°對(duì)稱位置截取。