Standard No.:	NB/T 47018.7-2022
English Name:	Technical conditions for ordering welding materials for pressure equipment - Part 7: Titanium and titanium alloy welding wires and filler wires
Chinese Name:	承压设备用焊接材料订货技术条件 第7部分：钛及钛合金焊丝和填充丝
Professional Classification:	NB    Professional Standard - Energy
Issued by:	National Energy Adminstration
Issued on:	2022-11-04
Implemented on:	2022-12-31
Status:	valid
Superseding:	NB/T 47018.7-2011 Technical permission of welding materials for pressure equipment - Part 7: Titanium and titanium-alloy welding electrodes and rods
Language:	English
File Format:	PDF
Word Count:	6000 words
Price(USD):	180.0
Delivery:	via email in 1 business day

Foreword 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 is Section 7 of NB/T 47018 under the general title Technical permission of welding materials for pressure equipment: The following parts of GB/T 47018 have been issued: ——Section 1: General rules for procurement; ——Section 2: Electrodes for steel; ——Section 3: Steel electrodes and rods for gas shielded arc welding; ——Section 4: Electrodes and fluxes for submerged arc welding; ——Section 5: Stainless steel strip electrodes and fluxes for overlay welding; ——Section 6: Bare aluminum and aluminum-alloy welding electrodes and rods; ——Section 7: Titanium and titanium-alloy welding electrodes and rods. This document replaces NB/T 47018.7-2011 Technical permission of welding materials for pressure equipment - Section 7: Titanium and titanium-alloy welding electrodes and rods. In addition to structural adjustment and editorial changes, the following main technical changes have been made with respect to NB/T 47018.7-2011: a) Two types of titanium welding electrodes and rods, ER TA7ELI and ER TC4ELI, are added and their chemical compositions are specified (see Tables 1 and 2 herein); b) The requirements on melting method are deleted (see 4.3 hereof; 4.3.1 of Edition 2011). 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 SAC/TC 262 National Technical Committee on Boilers and Pressure Vessels of Standardization Administration of China. The previous editions of this document are as follows: ——NB/T 47018.7-2011; ——This is the first revision. Specification of welding materials for pressure equipment Section 7: Titanium and titanium-alloy welding electrodes and rods 1 Scope This document specifies the designation, technical requirements, test methods, inspection rules and product marking of titanium and titanium-alloy welding electrodes and rods. This document is applicable to titanium and titanium-alloy welding electrodes and rods for gas tungsten arc welding (GTAW), gas metal arc welding (GMAW), plasma arc welding (PAW), and other suitable fusion welding methods of pressure equipment. 2 Normative references The following documents contain requirements which, through reference in this text, constitute provisions 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 2653 Bend test methods on welded joints GB/T 3620.1 Designation and composition of titanium and titanium alloys GB/T 3623 Titanium and titanium alloy wire GB/T 4698 (All parts) Methods for chemical analysis of titanium sponge, titanium and titanium alloys GB/T 5168 Microstructure and macrostructure examination for titanium and titanium alloys AWS A5.16 Specification for titanium and titanium-alloy welding electrodes and rods NB/T 47014 Welding procedure qualification for pressure equipment NB/T 47018.1 Technical permission of welding materials for pressure equipment - Section 1: General rule NB/T 47013.2 Nondestructive testing of pressure equipment - Part 2: Radiographic testing 3 Designation 3.1 Welding electrode and rod designations are categorized according to chemical composition and application. 3.2 The designation rules are as follows: "E" is for welding electrodes; "R" is for rods; "ER" is for both. Numbers and English letters following "R" or "ER" are the designation series. Example of welding electrode and rod designations are shown as follows: Note: See Annex A for the comparison of the designations of welding electrodes and rods of this document and those in other standards. 4 Technical requirements 4.1 In addition to those specified in GB/T 3623, titanium and titanium-alloy welding electrodes and rods for pressure equipment shall meet the requirements of NB/T 47018.1 and this document. 4.2 The designation, state, diameter and tolerance of titanium and titanium-alloy welding electrodes and rods shall meet those specified in Table 1.

Foreword i 1 Scope 2 Normative references 3 Designation 4 Technical requirements 5 Test methods 6 Inspection rules 7 Winding of welding electrodes 8 Packaging 9 Product marking Annex A (Informative) Designation comparison of titanium and titanium-alloy welding electrodes and rods in Chinese and American standards