GB/T 30583-2014 PDF EnglishUS$485.00 · In stock · Download in 9 seconds
GB/T 30583-2014: Specification for post weld heat treatment of pressure equipment Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
Similar standardsGB/T 30583-2014: Specification for post weld heat treatment of pressure equipment---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/GBT30583-2014NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 25.200 J 36 Specification for post weld heat treatment of pressure equipment Issued on. MAY 06, 2014 Implemented on. DECEMBER 01, 2014 Issued by. General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of the People's Republic of China. Table of ContentsForeword... 3 1 Scope... 4 2 Normative references... 4 3 Terms and definitions... 4 4 Basic process... 5 5 Equipment, instruments, temperature measuring supplies and thermal insulation materials... 13 6 Technical preparation... 15 7 Heating, temperature control... 17 8 Temperature measurement... 18 9 Heat insulation... 20 10 Post weld heat treatment report... 21 Annex A (informative) Diagram of post weld heat treatment thickness (δPWHT)... 22 Annex B (informative) Recommended width of heated band and gradient control band for partial post weld heat treatment of cylinders... 31 Annex C (normative) Determination method of effective heating area of post weld heat treatment furnace... 32 Annex D (informative) Record table of overall post weld heat treatment outside the furnace of pressure equipment (examples)... 351 ScopeThis document specifies general basic technical requirements for post weld heat treatment of steel pressure equipment. This document applies to post weld heat treatment of boilers and pressure vessels (excluding gas cylinders).2 Normative referencesThe 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 3375, Welding terminology GB/T 9452, Testing method for working zone of heat treatment furnace NB/T 47014, Welding procedure qualification for pressure equipment3 Terms and definitionsFor the purposes of this document, the terms and definitions defined in GB/T 3375, GB/T 9452 as well as the followings apply. 3.1 weldment Welded pressure equipment or parts thereof. 3.2 post weld heat treatment The process that, to eliminate the welding residual stress and improve the structure and performance of the welded joint, the weldment is uniformly heated to a sufficiently high temperature below the phase transition point of the metal, kept for a certain period of time, and then uniformly cooled. 3.3 soak band During partial post weld heat treatment, the area that the volume range over which the weldment reaches the specified temperature is on its surface. The soak band includes the weld zone, fusion zone, heat-affected zone and its adjacent base metal. 3.5 gradient control band The area that during partial post weld heat treatment, to prevent heat dissipation in the temperature range and heating range of the weldment, a thermal insulation material is laid on its surface. 3.7 holding time The time during which the indicated volume range of the weldment or its local soak band is maintained at the holding temperature. The holding time is calculated from the time when the temperature of all temperature measuring points reaches the minimum holding temperature.4 Basic process4.1 General provisions 4.1.1 In addition to complying with this Standard, the post weld heat treatment of pressure equipment shall also comply with the requirements of product standards, design documents and contracts. 4.1.4 The constructer of pressure equipment shall have technical personnel, who have certain professional knowledge and sufficient practical experience, after they master the following basic conditions, prepare "Process specifications for post weld heat treatment" for each (piece) weldment. 4.1.5 The welding process evaluation items used for weldments shall include all important factors and supplementary factors that may occur during the implementation of the "Process specifications for post weld heat treatment". 4.2 Post weld heat treatment thickness δPWHT 4.2.1 The δPWHT of equal thickness full penetration butt joint is the weld thickness (excess height is not counted). At this time, δPWHT is the same as the base metal thickness. 4.2.4 The values of δPWHT when welding pressure components with different thicknesses are as follows (see Annex A). 4.2.5 Thickness of post weld heat treatment calculation holding time. 4.3 Post weld heat treatment methods 4.3.3 Partial post weld heat treatment 4.4 Specification parameters of post weld heat treatment 4.4.1 The specification parameters of post weld heat treatment are shown in Table 1. 4.4.1.1 For Fe-1 and Fe-3 steel weldments, when the post weld heat treatment is performed below the minimum holding temperature in Table 1, the holding time can be extended as specified in Table 2.The holding temperature of Fe-9B steel weldments shall not exceed 635℃. When the post weld heat treatment is performed below the minimum holding temperature in Table 1 (up to 55°C reduction is allowed), the holding time can be extended according to the provisions of Table 2. 4.4.1.5 Limits of post weld heat treatment temperature for Fe-5B-2 steel weldments under the following conditions. 4.4.2 The holding time of post weld heat treatment can be completed in one heat treatment process. It can also be the accumulation of multiple heat treatment processes at the same holding temperature. 4.4.3 Unless otherwise specified, the temperature of each temperature measurement point is allowed to be within ±20°C of the specified temperature of the heat treatment process but cannot exceed the specified limit.5 Equipment, instruments, temperature measuring suppliesand thermal insulation materials 5.1 The post weld heat treatment furnace shall meet the following requirements. 5.2 The effective heating area of the post weld heat treatment furnace shall be determined according to the provisions of Annex C. The schematic diagram of the effective heating area shall be placed in a prominent position of the heat treatment furnace 5.3 Insulation materials, temperature control instruments and temperature measuring instruments shall meet corresponding standards. The product shall have quality certificate and instruction manual. 5.4 Manufacturers of thermocouples and compensation wires shall have corresponding qualifications. The used thermocouple and compensation wire shall have quality certificate. 5.5 All kinds of measuring instruments shall pass the measurement inspection according to the standard. Before use, calibrate as specified. 5.6 The post weld heat treatment heating, temperature control, temperature measurement device and the whole system outside the furnace shall be inspected and debugged each time before being put into use. Make them in a normal state and meet the heat treatment requirements. 5.7 The thermal insulation material shall not contain elements and impurities that are harmful to the weldment. It is advisable to use aluminum silicate fiber and its products, high silica cloth, alkali-free glass fiber cloth.6 Technical preparation6.1 In the case of overall post weld heat treatment or partial post weld heat treatment in the furnace, the main contents of the specification for the post weld heat treatment process include. 6.2 For the specification for post weld heat treatment process of the overall post weld heat treatment outside the furnace (including the overall post weld heat treatment outside the furnace), an expert review shall be organized if necessary. The main contents of the specification for post weld heat treatment process include. 6.3 Remove the non-permanent connections on weldments not related to post weld heat treatment. 6.4 Effective measures shall be taken for finishing surfaces such as sealing surfaces and screw holes of weldments, so as to prevent high temperature oxidation. 6.5 When performing post weld heat treatment outside the furnace, the heating equipment shall have sufficient power reserve.7 Heating, temperature control7.1 Technical requirements 7.1.1 When performing post weld heat treatment in the furnace, according to the technical requirements of the weldment, the corresponding type of heat treatment furnace shall be selected in accordance with the provisions of GB/T 9452.Weldments shall be placed within the effective heating area. 7.1.3 The heating medium shall avoid spraying the weldment directly. 7.1.4 The heating medium shall not cause oxidation, decarburization, carburization and corrosion on the surface of the weldment that exceeds the depth specified in the technical documents. 7.2 Regulations for post weld heat treatment furnaces and instruments 7.2.1 The detection period of the effective heating area of the post weld heat treatment furnace is 6 months. For the heat treatment furnace of normal use that has passed the inspection for 3 consecutive cycles, the detection period can be extended to 1 year. 7.2.4 The temperature measurement system of the post weld heat treatment device shall be regularly calibrated under normal use. During calibration, the distance between the hot ends of the detection thermocouple, temperature measurement thermocouple and temperature control thermocouple shall be close.8 Temperature measurement8.1 Temperature measuring points and their arrangement Figure 2 -- Thermocouple arrangement spacing diagram 8.1.4 Additional thermocouples can be added for temperature measurement points in important parts. 8.1.5 The number of temperature measurement points and their arrangement shall be indicated in the design drawing or schematic diagram of the weldment. 8.2 Welding requirements for capacitor energy storage points Use welding methods (such as capacitor energy storage spot welding) to connect thermocouples to weldments. The welding requirements for capacitor energy storage points are as follows. 8.3 Temperature measurement 8.3.1 During the post weld heat treatment and heat holding period, the temperature of any point on the weldment of the overall post weld heat treatment and the temperature of any point within the volume range shown in the soak band of the weldment of the partial post weld heat treatment shall be within the specified range. 8.3.2 The post weld heat treatment temperature is subject to direct measurement on the weldment.9 Heat insulation9.1 The thermal insulation material shall be able to maintain the original performance at the post weld heat treatment temperature and holding time without reducing the thermal insulation effect. 9.2 The thermal insulation material shall be close to the surface of the weldment during the entire post weld heat treatment process. Prevent loosening and falling off. When the thermal insulation material is laid on the weldment, it shall be divided into at least two layers. The seams between each two layers shall be staggered. 9.4 The temperature of the outer surface of the thermal insulation layer shall not be higher than 60℃. ......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 30583-2014 be delivered?Answer: The full copy PDF of English version of GB/T 30583-2014 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 30583-2014_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 30583-2014_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 30583-2014 -- 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.How to buy and download a true PDF of English version of GB/T 30583-2014?A step-by-step guide to download PDF of GB/T 30583-2014_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 30583-2014". 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 |
