1 Scope
This Section of NB/T 47018 specifies the designation preparation, technical requirements, test methods and inspection rules of the titanium and titanium-alloy welding electrodes and rods.
This Section is applicable to titanium and titanium-alloy welding electrodes and rods used for the gas tungsten arc welding, gas metal arc welding and plasma arc welding of pressure equipment.
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 normative 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) Chemical Analytical Methods for Chemical of Titanium Sponge and Titanium and Titanium Alloys
GB/T 5168 Microstructure and Macrostructure Examination for α-β Titanium Alloys
NB/T 47018.1 Technical Permission of Welding Materials for Pressure Equipment Section 1: General Rule
JB/T 4730.2 Nondestructive Testing for Pressure Equipment - Part 2: Radiographic Testing
3 Designation
3.1 The designation of welding electrodes and rods is classified according to chemical composition and use occasion.
3.2 Designation preparation
"E" means applying to welding electrodes; "R" means applying to rods; "ER" means applying to welding electrodes as well as rods.
Numbers and English letters after "R" "ER" are designation series.
Designation examples of the welding electrodes and rods are as follows:
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 Identification
Appendix A (Informative) Codes for Titanium and Titanium-alloy Welding Electrodes and Rods in Chinese and American Standards
