GB/T 18442.4-2019 PDF EnglishUS$155.00 · In stock · Download in 9 seconds
GB/T 18442.4-2019: Static vacuum insulated cryogenic pressure vessels -- Part 4: Fabrication Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 18442.4: Historical versions
Similar standardsGB/T 18442.4-2019: Static vacuum insulated cryogenic pressure vessels -- Part 4: Fabrication---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT18442.4-2019NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 23.020.40 J 76 Replacing GB/T 18442.4-2011 Static vacuum insulated cryogenic pressure vessels - Part 4.Fabrication Issued on. DECEMBER 10, 2019 Implemented on. DECEMBER 10, 2019 Issued by. State Administration for Market Regulation; Standardization Administration of the PRC. Table of ContentsForeword... 3 1 Scope... 6 2 Normative references... 7 3 Terms and definitions... 8 4 General requirements... 8 5 Material re-inspection, division and mark transplantation... 9 6 Cold and hot forming and assembly... 9 7 Welding... 12 8 Nondestructive testing... 16 9 Heat treatment... 19 10 Cleaning requirements... 19 11 Assembly requirements... 20 12 Installation of adsorbent... 21 13 Pipeline fabrication... 21 14 Helium mass spectrometer leak detection... 22 15 Tank coating... 22 16 Mark and identification... 23 17 Exit-factory data... 23 18 Sealing and shipping... 251 ScopeThis Part of GB/T 18442 specifies the basic requirements, such as material re- inspection, machining and forming, welding, nondestructive testing, cleaning, assembly, mark and identification, and exit-factory data, in the fabrication of static vacuum insulated cryogenic pressure vessels (hereinafter referred to as cryogenic vessels). This Part applies to cryogenic vessels, which simultaneously meet the following conditions. a) The working pressure of the inner vessel is not less than 0.1 MPa; b) The geometric volume is not less than 1 m3; c) The insulation method is vacuum powder insulation, vacuum composite insulation, or high vacuum multilayer insulation; d) The storage medium is a refrigerated liquefied gas with a standard boiling point of not lower than -196 °C. This Part does not apply to cryogenic vessels in the following scope. a) The material of inner vessel and outer jacket is non-ferrous metal or non- metal; b) HAVE a spherical structure; c) Stacked insulation; d) Mobile; e) STORE refrigerated liquefied gas medium with standard boiling point below -196 °C; f) The storage medium is toxic gas according to GB 12268; g) Those with special requirements such as national defense and military equipment.2 Normative referencesThe following documents are indispensable for the application of this document. For the dated references, only the editions with the dates indicated are applicable to this document. For the undated references, the latest edition (including all the amendments) are applicable to this document. GB/T 150-2011 (all parts) Pressure vessels GB/T 1804-2000 General tolerances - Tolerances for linear and angular dimensions without individual tolerance indications GB/T 9969 General principles for preparation of instructions for use of industrial products GB/T 18442.1 Static vacuum insulated cryogenic pressure vessels - Part 1. General requirements GB/T 18442.3 Static vacuum insulated cryogenic pressure vessels - Part 3. Design GB/T 25198 Heads for pressure vessels3 Terms and definitionsThe terms and definitions defined in GB/T 150, GB/T 18442.1, GB/T 18442.3 apply to this document.4 General requirements4.1 The fabrication of cryogenic vessels shall comply with the requirements of TSG 21, GB/T 150.4, this Part, and the design documents approved by the prescribed procedures. 4.2 When the pressure components (heads, forgings, etc.) and safety accessories, instruments, handling accessories, etc. are purchased and outsourced parts, the fabrication organization of the cryogenic vessel shall ensure that, the quality of the purchased and outsourced parts meets the requirements of the design documents and this Part, and can be used only after passing the inspection. 4.3 The limit deviation of the linear dimension of the machined surface and non- machined surface is in accordance with the requirements of grade m and grade c in GB/T 1804-2000, respectively.5 Material re-inspection, division and mark transplantation5.1 The re-inspection of the materials shall meet the requirements of TSG 21, GB/T 150.4, and design documents. 5.2 The materials, used to manufacture pressure components, shall have traceable marks. In the fabrication process, if the original mark is cut or the material is divided, before the material is divided, the fabrication organization shall complete the mark transplantation. 5.4 For the pressure components of the inner vessel, embossing stamp shall not be used as material transplantation marks, welder marks, and other marks.6 Cold and hot forming and assembly6.1 Forming 6.1.1 The cylinder and head can be processed into the desired shape using cold and hot forming methods. 6.1.4 The fabrication organization shall, according to the manufacturing process, determine the machining allowance. The thickness of the pressure component after forming shall not be less than the minimum forming thickness marked on the design drawing. 6.2 Surface polishing During the fabrication process, mechanical damage to the surface of the steel plate shall be avoided. Sharp flaws, local flaws and grooves and other defects on the surface of stainless steel shall be polished. The maximum slope of the polishing is 1.3. 6.3 Groove The surface quality of the groove shall comply with the provisions of GB/T 150.4. 6.4 Head 6.4.1 The head shall meet the requirements of GB/T 25198 and design drawings. 6.5 Cylinder and tank 6.5.1 The amount of the butt misalignment of type A and B welded joints and the edges and corners formed in the circumferential and axial directions of the welded joints shall comply with the provisions of GB/T 150.4. 6.5.2 The butt requirements for type B welded joints of unequal-thickness steel and type A welded joints between cylinders and spherical heads shall comply with the provisions of GB/T 150.4. 6.5.3 The straightness tolerance of cylinder shall comply with the provisions of GB/T 150.4. 6.6 Other assembly requirements 6.6.1 The main geometric dimensions and nozzle orientation of the tank shall meet the requirements of the design drawings. 6.6.2 The fabrication and assembly requirements of leg supports are in accordance with NB/T 47065.2. 6.6.5 The fabrication and assembly requirements of the skirt are in accordance with NB/T 47041.7 Welding7.1 Preparation before welding and welding environment The preparation before welding and welding environment shall comply with the provisions in 7.1 of GB/T 150.4-2011. 7.2 Welding procedure 7.2.1 Cryogenic vessels shall, in accordance with NB/T 47014, be subjected to welding procedure qualification; and, meet the requirements of TSG 21 and GB/T 150.4. 7.2.2 When using materials of foreign designations (including filling materials) for the pressure components of the welded structure, before the first use, the fabrication organization shall conduct the welding procedure qualification according to NB/T 47014. 7.2.5 The welding of the tank shall strictly control the linear energy. Within the range confirmed by the welding procedure qualification, a smaller welding linear energy should be selected; multi-pass welding is appropriate. 7.3 Shape, size, and appearance requirements of weld surface of tank 7.3.1 The shape and size of the weld surface shall meet the following requirements. 7.3.2 The surface quality of the welded joint shall meet the following requirements. 7.3.3 The welding of temporary accessories shall meet the following requirements. 7.4 Repair of welded joints and repair-welding of base metal defects 7.4.1 It shall analyze the causes of defects; propose the corresponding repair or repair-welding plan. 7.4.2 Repair and repair-welding of welded joints shall be subjected to welding procedure qualification or be supported by the welding procedure which passes the qualification. When welding, there shall be detailed records of repair or repair-welding. 7.5 Product welded test coupons and samples 7.5.1 For inner vessels that meet one of the following conditions and have type A longitudinal welded joints, product welded test coupons shall be prepared one by one.8 Nondestructive testing8.1 Nondestructive testing methods 8.1.1 Nondestructive testing methods include radiographic testing, ultrasonic testing, magnetic particle testing, and penetrant testing. Radiographic testing shall meet the requirements of NB/T 47013.2, NB/T 47013.11, or NB/T 47013.14. 8.1.2 The fabrication organization or nondestructive testing organization shall, in accordance with the requirements of the design drawings and the provisions of NB/T 47013.1, formulate the nondestructive testing process. 8.2 Selection of nondestructive testing methods 8.2.1 Type A and B welded joints of inner vessel and outer jacket (except for closed type B welded joints of craft manhole cylinder of inner vessel and of craft manhole head with the convex surface compressed, closed type B welded joints of outer jacket), pipeline butt joints shall be subjected to radiographic testing or ultrasonic testing. Ultrasonic testing includes time-of-flight diffraction ultrasonic testing (TOFD), recordable pulse reflection ultrasonic testing, and non-recordable pulse reflection ultrasonic testing. 8.3 Nondestructive testing ratio and technical requirements of inner vessel 8.3.1 Type A and B welded joints shall be subjected to 100% radiographic testing or ultrasonic testing. 8.3.2 The method and requirements for the nondestructive testing of the closed type B welded joint of craft manhole cylinder and the craft manhole head with the convex surface compressed shall comply with the design drawings. 8.4 Nondestructive testing ratio and technical requirements of outer jacket 8.4.1 Type A and B welded joints (except for the closed type B welded joints of outer jacket) shall be subjected to local radiographic testing. The testing length is not less than 20% of the length of each welded joint; and, must not be less than 250 mm. The technical grade of the radiographic testing shall not be lower than grade AB of the corresponding testing method. The conformity level shall not be lower than level III. 8.5 Nondestructive testing ratio and technical requirements of pipeline 8.5.1 For the pipelines inside and outside the vacuum annular space, according to NB/T 47013.2, the type B welded joints shall be 100% radiographically tested. The technical grade of radiographic testing shall not be lower than grade AB. The conformity level shall not be lower than level II. 8.5.2 For the pipelines inside and outside the vacuum annular space, in accordance with NB/T 47013.5, the type C and D welded joints shall be subjected to 100% penetrant testing. The conformity level shall be level I. 8.6 Duplicate testing 8.6.1 If an unacceptable defect is found in a welded joint that has undergone nondestructive testing, after the defect is removed, repair-welding shall be carried out. The previous nondestructive testing method and conformity level shall be used for re-testing and assessment of the location. 8.7 Implementation timing of nondestructive testing 8.7.1 Nondestructive testing of welded joints shall be carried out after passing the examination of shape, dimension, and appearance quality. 8.7.2 The spliced head shall, after forming, be subjected to nondestructive testing. If nondestructive testing has been performed before forming, after forming, nondestructive testing shall also be conducted from the arc transition zone to the straight side section.9 Heat treatment9.1 The heat treatment requirements of the tank shall meet the requirements of GB/T 150.4 and design documents. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of GB/T 18442.4-2019 be delivered?Answer: The full copy PDF of English version of GB/T 18442.4-2019 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of GB/T 18442.4-2019_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 18442.4-2019_English will be deemed to be sold to your employer/organization who actually paid for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. www.ChineseStandard.us -- GB/T 18442.4-2019 -- Click this link and select your country/currency to pay, the exact amount in your currency will be printed on the invoice. Full PDF will also be downloaded/emailed in 9 seconds.Question 5: Should I purchase the latest version GB/T 18442.4-2019?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 18442.4-2019 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.How to buy and download a true PDF of English version of GB/T 18442.4-2019?A step-by-step guide to download PDF of GB/T 18442.4-2019_EnglishStep 1: Visit website https://www.ChineseStandard.net (Pay in USD), or https://www.ChineseStandard.us (Pay in any currencies such as Euro, KRW, JPY, AUD).Step 2: Search keyword "GB/T 18442.4-2019". Step 3: Click "Add to Cart". If multiple PDFs are required, repeat steps 2 and 3 to add up to 12 PDFs to cart. Step 4: Select payment option (Via payment agents Stripe or PayPal). Step 5: Customize Tax Invoice -- Fill up your email etc. Step 6: Click "Checkout". Step 7: Make payment by credit card, PayPal, Google Pay etc. After the payment is completed and in 9 seconds, you will receive 2 emails attached with the purchased PDFs and PDF-invoice, respectively. Step 8: Optional -- Go to download PDF. Step 9: Optional -- Click Open/Download PDF to download PDFs and invoice. See screenshots for above steps: Steps 1~3 Steps 4~6 Step 7 Step 8 Step 9 |
