NB/T 47018.7-2022 English PDF (NB/T47018.7-2022)

Delivery: 3 seconds. Download true-PDF + Invoice.
Get Quotation: Click NB/T 47018.7-2022 (Self-service in 1-minute)
Historical versions (Master-website): NB/T 47018.7-2022
Preview True-PDF (Reload/Scroll-down if blank)

NB/T 47018.7-2022: Technical conditions for ordering welding materials for pressure equipment - Part 7: Titanium and titanium alloy welding wires and filler wires
NB/T 47018.7-2022
NB
ENERGY INDUSTRY STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 25.160.10
CCS J 33
Replacing NB/T 47018.7-2011
Specification of Welding Materials for Pressure Equipment -
Section 7: Titanium and Titanium-Alloy Welding Electrodes and
Rods
充丝
ISSUED ON: NOVEMBER 4, 2022
IMPLEMENTED ON: DECEMBER 31, 2022
Issued by: National Energy Administration
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative References ... 5
3 Designation ... 6
4 Technical Requirements ... 6
5 Test Methods ... 9
6 Inspection Rules ... 12
7 Winding of Welding Wire ... 13
8 Packaging ... 13
9 Product Identification ... 13
Appendix A (Informative) Designation Comparison of Titanium and Titanium
Alloys Welding Wire and Filler Wire in Chinese and American Standards ... 15
Foreword
This Document was drafted as per the rules specified in GB/T 1.1-2020 Directives for
Standardization – Part 1: Rules for the Structure and Drafting of Standardizing Documents.
This Document is Part 7 of NB/T 47018 Technical Permission of Welding Materials for
Pressure Equipment. NB/T 47018 consists of the following parts:
--- Part 1: General Rules of Procurement;
--- Part 2: Electrodes for Steel;
--- Part 3: Steel Electrodes and Rods for Gas Shielded Arc Welding;
--- Part 4: Electrodes and Fluxes for Submerged Arc Welding;
--- Part 5: Stainless-Steel Strip Electrodes and Fluxes for Overlay Welding;
--- Part 6: Aluminum and Aluminum Alloy Welding Wires and Filler Wires;
--- Part 7: Titanium and Titanium Alloy Welding Wires and Filler Wires;
This Document replaced NB/T 47018.7-2011 Technical Permission of Welding Materials for
Pressure Equipment - Section 7: Titanium and Titanium-Alloy Welding Electrodes and Rods.
Compared with NB/T 47018.7-2011, the major technical changes of this Document are as
follows besides structural adjustments and editorial modifications:
a) Add two models of titanium welding wire and filler wire, ER TA7ELI and ER TC4ELI;
and specify their chemical compositions (see Tables 1 and 2 of this Edition);
b) Delete the provisions on smelting methods (see 4.3 of this Edition; 4.3.1 of the 2011
Edition).
Please note some contents of this Document may involve patents. The issuing agency of this
Document shall not assume the responsibility to identify these patents.
This Document was proposed by and under the jurisdiction of National Technical Committee
on Boilers and Pressure Vessels of Standardization Administration of China (SAC/TC 262).
Drafting organizations of this Document: Hefei General Machinery Research Institute Co., Ltd.;
China Special Equipment Inspection and Research Institute; China Special Equipment Inspection
Group Co., Ltd.; Nanjing Youtian Metal Technology Co., Ltd.; Shanghai Institute of Special
Equipment Inspection and Technical; Tianjin Institute of Special Equipment Supervision and
Inspection Technology; Guangxi Zhuang Autonomous Region Special Equipment Inspection
and Research Institute; Harbin Welding Research Institute Co., Ltd.; Tianjin Golden Bridge
Welding Materials Group Co., Ltd.; Advanced Technology and Materials Co., Ltd. of China Iron
Specification of Welding Materials for Pressure Equipment -
Section 7: Titanium and Titanium-Alloy Welding Electrodes and
Rods
1 Scope
This Document specifies the designation compilation, technical requirements, test methods,
inspection rules and product identification of titanium and titanium alloy welding wires and
filler wires.
This Document is applicable to titanium and titanium alloy welding wires and filler wires for
gas tungsten arc welding, gas metal arc welding and plasma arc welding and other suitable
melting welding methods of pressure equipment.
2 Normative References
The provisions in following documents become the essential provisions of this Document
through reference in this Document. For the dated documents, only the versions with the dates
indicated are applicable to this Document; for the undated documents, only the latest version
(including all the amendments) is applicable to this Document.
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 Titanium and titanium alloy welding wire and filler wire
NB/T 47014 Welding procedure qualification for pressure equipment
NB/T 47018.1 Technical permission of welding materials for pressure equipment - Part 1:
General rule
4.4 The transverse metallographic inspection (macrostructure) results of titanium and titanium
alloy welding wires and filler wires shall be free of cracks, folds, pores, delamination, shrinkage,
metal or non-metal inclusions and other defects that affect use.
4.5 The surface of titanium and titanium alloy welding wires and filler wires shall be clean and
smooth, free of burrs, depressions, scratches, scales, folds and other defects that affect use; and
free of contamination by lubricants and other foreign substances.
4.6 After the weld metal longitudinal bending specimen is bent to the specified angle, there
shall be no single opening defect with a length greater than 3 mm in any direction along the
inner edge of the weld metal on the tensile surface. The corner opening defects of the specimen
weld metal can be ignored; but the length of the corner opening defects caused by un-fusion,
slag inclusions or other internal imperfections shall be included.
5 Test Methods
5.1 The chemical composition analysis specimens of titanium and titanium alloy welding wires
and filler wires shall be taken as finished product analysis; and the arbitration test shall be
carried out in accordance with the provisions of GB/T 4698 (all parts).
5.2 The size inspection of titanium and titanium alloy welding wire and filler wire shall be
measured with a measuring tool with an accuracy of 0.01 mm.
5.3 The metallographic inspection (macrostructure) of titanium and titanium alloy welding wire
and filler wire shall be carried out in accordance with the provisions of GB/T 5168. When the
transverse metallographic inspection (macrostructure) finds that the welding wire or filler wire
has unnecessary defects, the welding wire or filler wire with typical defects can be sampled for
radiographic test.
5.4 The surface and macroscopic quality inspection of titanium and titanium alloy welding wire
and filler wire shall be visually inspected.
5.5 Radiographic test and bending performance inspection of weld metal
5.5.1 Preparation of test pieces
welding wire and filler wire.
6.2.2 Take 2 coils (or pieces) of each batch of welding wire and filler wire at random; and
respectively take 1 specimen at each end of each piece for transverse metallographic inspection
(macrostructure).
6.2.3 The size, surface and macroscopic quality of welding wire and filler wire shall be
inspected piece/coil by piece/coil.
7 Winding of Welding Wire
7.1 The welding wire is supplied in the form of welding wire coils and welding wire reels with
internal support; and the filler wire is supplied in the form of coils, reels or straight bars with
internal support. The welding wire can also be supplied in other forms after the supplier and the
purchaser agree.
7.2 The welding wire and the filler wire shall meet the requirements of continuous feeding in
automatic or semi-automatic welding equipment.
7.3 The welding wire of each welding wire coil and welding wire reel shall be a continuous
length of welding wire of the same furnace number. The winding of the welding wire is not
allowed to have sharp bends, kinks, waves, embedding, overlaps; and can be unwound freely
without hindrance. The outer end of the welding wire shall be fixed and marked, which is
obvious and easy to find.
7.4 When the welding wire has a joint, it shall be properly processed so as not to affect its
uniform and continuous feeding in the welding equipment.
8 Packaging
8.1 The inner packaging of welding wire and filler wire shall be kept dry, free from
environmental pollution and prevent rust.
8.2 The outer packaging of welding wire and filler wire shall be protected from damage during
transportation and storage.
9 Product Identification
9.1 The inner and outer packaging, instruction manual and quality certificates of welding wire
and filler wire manufactured in accordance with the provisions of this Document shall be
marked with the words "Titanium and titanium alloy welding wire (filler wire) for pressure
equipment" and the product identification "NB/T 47018". The product identification shall also
be printed on the inner packaging label.