NB/T 47018.8-2022 PDF English
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Technical conditions for ordering welding materials for pressure equipment - Part 8: Zirconium and zirconium alloy welding wires and filler wires
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NB/T 47018.8-2022: PDF in English (NBT 47018.8-2022) NB/T 47018.8-2022
NB
ENERGY INDUSTRY STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 25.160.10
CCS J 33
Specification of Welding Materials for Pressure Equipment -
Section 8: Zirconium and Zirconium-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 ... 4
2 Normative References ... 4
3 Designation ... 4
4 Technical Requirements ... 5
5 Test Methods ... 6
6 Inspection Rules ... 9
7 Winding of Welding Wire ... 9
8 Packaging ... 10
9 Product Identification ... 10
Appendix A (Informative) Designation Comparison of Zirconium and Zirconium
Alloys Welding Wire and Filler Wire in Chinese and American Standards ... 11
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 8 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.
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 & Research Institute; China Special Equipment Inspection
Group Co., Ltd.; Nanjing Youtian Metal Technology Co., Ltd.; Harbin Welding Research
Institute Co., Ltd.; Lanzhou LS Heavy Equipment 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; Tianjin Golden Bridge Welding Materials Group Co., Ltd.; Kunshan
Gintune Welding Co., Ltd.; Sichuan Atlantic China Welding Consumables, Inc.; and Beijing
Jinwei Welding Material Co., Ltd.
Chief drafting staffs of this Document: Fang Wunong, Li Jun, Ji Fang, Ge Wei, Dou Wanbo,
Xu Kai, Lei Wanqing, Wang Haitao, Gu Fuming, Wang Zejun, Hu Weipeng, Xiao Huiying,
Tong Tianwang, Jiang Yong, Ming Tingze, and Cui Xiaodong.
This Document is first-time published.
Specification of Welding Materials for Pressure Equipment -
Section 8: Zirconium and Zirconium-Alloy Welding Electrodes
and Rods
1 Scope
This Document specifies the designation compilation, technical requirements, test methods,
inspection rules and product identification of zirconium and zirconium alloy welding wires and
filler wires.
This Document is applicable to zirconium and zirconium alloy welding wires and filler wires
for gas tungsten arc welding, gas metal arc welding and plasma arc welding of pressure
equipment and other suitable melting welding methods.
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 26314 Designation and composition of zirconium and zirconium alloys
GB/T 8769 Zirconium and zirconium alloy bars and wires
GB/T 13747 (all parts) Methods for chemical analysis of zirconium and zirconium alloys
GB/T 5168 Microstructure and macrostructure examination for titanium and titanium
alloys
NB/T 47018.1 Technical permission of welding materials for pressure equipment - Part 1:
General rule
NB/T 47013.2 Nondestructive testing of pressure equipment - Part 2: Radiographic testing
AWS A5.24 Zirconium and zirconium alloy welding wire and filler wire
3 Designation
5.5.2.5 Bending test shall comply with the provisions of Table 5 and GB/T 2653.
6 Inspection Rules
6.1 Inspection items
Each batch of welding wire and filler wire shall be subject to chemical composition, size,
metallographic inspection (macrostructure), surface and macroscopic quality, weld metal
radiographic inspection and bending test.
6.2 Sampling location and sampling quantity
6.2.1 Each batch of welding wire and filler wire shall be sampled on the finished product for C,
O, H and N content analysis. The content of other compositions shall be reported according to
the analysis results of the original ingot. Arbitration analysis shall be sampled on the finished
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 "Zirconium and zirconium 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.
9.2 The end of each straight filler wire shall be marked with a permanent mark indicating the
designation and product identification. The bytes may be appropriately reduced according to
the specific situation.
9.3 The product packaging shall also include at least the following contents:
a) Designation and commercial designation of welding wire or filler wire;
b) Batch number, furnace number;
c) Specifications and weight.
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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