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NB/T 47019.5-2011 English PDF (NBT47019.5-2011)

NB/T 47019.5-2011 English PDF (NBT47019.5-2011)

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NB/T 47019.5-2011: Purchase technical specification for boiler and heater exchanger tubes/pipes. Part 5: Stainless steel

This part specifies the classification and marking, technical requirements, test methods, inspection rules, packaging, marking and quality requirements for seamless and welded stainless steel tubes.
NB/T 47019.5-2011
ICS 27.060.30
J 75
NB
INDUSTRY STANDARD
OF THE PEOPLE REPUBLIC OF CHINA
Purchase technical specification for boiler and heater
exchanger tubes/pipes - Part 5. Stainless steel
ISSUED ON. JULY 01, 2011
IMPLEMENTED ON. OCTOBER 01, 2011
Issued by. National Energy Administration
Table of contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 General requirements ... 6
4 Dimensions and shapes ... 6
5 Technical requirements ... 7
6 Test methods ... 12
7 Inspection rules ... 12
8 Packaging, marking and quality certificates ... 14
Foreword
This standard NB/T 47019-2011 ?€?Purchase technical specification for boiler and heater exchanger tubes/pipes?€? was compiled with reference to the European standard EN, United States standard ASME, Japan standard JIS, and so on, combining with China's national standards and industry standards, AND the purchase agreement of boiler and heat exchanger manufacturers.
This standard covers the purchase technical specifications for the steel tubes and non-ferrous metal tubes which are normally used in boiler, heat exchangers and other pressure equipment. It is mainly divided into the following eight parts. - Part 1. General requirements;
- Part 2. Non-alloy and alloy steel with room temperature properties;
- Part 3. Non-alloy and alloy steel with specified elevated temperature properties;
- Part 4. Low alloy steel for low-temperature services.
- Part 5. Stainless steel;
- Part 6. Ferrite/austenitic duplex steel;
- Part 7. Copper and copper alloy tube;
- Part 8. Titanium and titanium alloy.
This part is the fifth part of NB/T 47019-2011. As compared with the domestic and international standards, the main differences are as follows.
- SPECIFY the composition and performance of seamless steel tube and
welded steel tube;
- ADD the specifications for the inspection items as agreed between both parties;
- SPECIFY the stricter packaging requirements;
This part of the standard was proposed by AND shall be under the jurisdiction of the National Boiler and Pressure Vessel Standardization Technical
Committee (SAC/TC 262).
This drafting organizations of this part. China Special Equipment Testing and Research Institute, Gansu Lanke Petrochemical High-tech Equipment Co., Ltd., China Special Equipment Testing and Research Institute, Jiangsu Wujin
Stainless Steel Tube Factory Group Co., Ltd., Haiyan Zhongda Special Steel Co., Ltd., Wuxi Tengyue Special Steel Tube Co., Ltd, Zhejiang Jiuli Hi-tech Metals Co., Ltd.
The main drafters of this part. Pan Jianguo, Zhang Yanfeng, Zhou Wenxue, Wang Weiguo, Zhang Xian, Song Jianxin, Xu Yaosong, Shao Yu.
As for this part, the National Boiler and Pressure Vessel Standardization Technical Committee (SAC/TC 262) will be responsible for its interpretation. Purchase technical specification for boiler and heater
exchanger tubes/pipes - Part 5. Stainless steel
1 Scope
This part specifies the classification and marking, technical requirements, test methods, inspection rules, packaging, marking and quality requirements for seamless and welded stainless steel tubes.
This part applies to seamless and welded stainless steel tubes for boilers and heat exchangers.
2 Normative references
The following documents are essential to the application of 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) are applicable to this document.
GB/T 222 Permissible tolerances for chemical composition of steel products GB/T 223 (all parts) Methods for chemical analysis of iron steel and alloy GB/T 228 Metallic materials ?€? Tensile testing at ambient temperature
GB/T 230.1 Metallic materials ?€? Rockwell hardness test ?€? Part 1. Test
method
GB/T 241 Metal materials ?€? Tube ?€? Hydrostatic pressure test
GB/T 242 Metal materials ?€? Tube ?€? Drift-expending test
GB/T 246 Metal materials ?€? Tube ?€? Flattening test
GB/T 2102 Acceptance packing marking and quality certification of steel pipe GB/T 2975 Steel and steel products ?€? Location and preparation of test pieces for mechanical testing
GB/T 4334 Corrosion of metals and alloys ?€? Test methods for intergranular corrosion of stainless steel
flattened, the weld on the sample shall be free from cracks, insufficient penetration, or folding due to inner weld finishing.
5.5.4 Reverse bending test
As for the tube with the ratio of wall thickness to outer diameter less than 10% OR the wall thickness less than 3.4 mm OR the outer diameter less than 9.5 mm, it shall be subjected to the reverse bending test. After the test, the sample shall be free from cracks or folding due to inner weld finishing.
5.6 Water pressure test
5.6.1 The steel tube shall be subjected to water pressure test one by one. The maximum test pressure shall not exceed 20 MPa AND the pressure regulation time shall be 10 s.
5.6.2 Where the purchaser has no requirement, the manufacturer may use the eddy current test in lieu of the water pressure test. When the eddy current test is used to replace the water pressure test, the artificial defects of the contrasting sample tube and the acceptance level shall comply with the requirements of level A in GB/T 7735.
5.7 Underwater sealing test
As requested by the purchaser, the welded tube may be subjected to the
underwater sealing test in accordance with NB/T 47019.1.
5.8 Intergranular corrosion
The tube shall be, in accordance with the method E of GB/T 4334, subjected to the intergranular corrosion test. If requested by the purchaser AND noted in the contract, it is also allowed to use other intergranular corrosion test methods. 5.9 Non-destructive test
5.9.1 The seamless tube shall be subjected to the ultrasonic detection one by one, AND the longitudinal depth level of the contrasting sample tube shall comply with the provisions of L2.5 in GB/T 5777.
5.9.2 The welded tube shall be subjected to the eddy current test one by one, AND the artificial defects and acceptance level of the contrasting sample tube shall comply with the provisions of level A in GB/T 7735.

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