JB/T 6296.3-1992 Turbine Pipe Accessories Argon Arc Welding Multiple Welding Liner Ring JB/T6296.3-1992 Standard Download Decompression Password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
Steam Turbine Piping Accessories
Subject Content and Scope of Application
Argon Arc Welding Butt Welding Backing Ring
This standard specifies the size series and basic requirements for argon arc welding butt welding backing rings. This standard applies to steel pipes with water, saturated steam, superheated steam, oil and gas as media. 2 Reference standards
GB699 Technical conditions for high-quality carbon steel
GB1220 Stainless steel bars
GB1804 Tolerances and fits, limit deviations of sizes without tolerances GB3280 Stainless steel cold-rolled steel plates
Structural types and dimensions
Structural types and dimensions are as specified in the following figure and Table 1 0.2×45°
Liner width
Approved by the Ministry of Machinery and Electronics Industry on June 26, 1992 Village ring thickness
Liner inner diameter
JB/T6296.3-92
Implementation on January 1, 1993
Nominal
Seamless steel pipe specifications ||tt ||Outer diameter times wall thickness
73×476×4
108×4
133×4
219×6bzxz.net
273×8
325×8
377×10
426×13
480×15
530×1 5
JB /T6296.3-92
Example of marking for argon arc welding butt welding backing ring with nominal diameter of 50mm and material of 00Cr19Ni11: butt welding backing ring D5000Cr19Ni11
5 Technical requirements
JB/T6296.3—92
5.1 The inner diameter (d) tolerance of the backing ring shall be in accordance with H16 of GB1804. After the backing ring is bent and formed, the gap between the joints at both ends shall be greater than 0.5mm. 5.2 The backing ring shall be made of the materials specified in Table 2. Table 2
Material name
High-quality carbon steel
Stainless steel pot
Note: The steel types in brackets are not recommended
00Cr19Ni11(1Cr18Ni9Ti)
GB1220GB3280
5.3 The appearance surface of the lining ring should have the correct geometric shape, and should not have defects such as twists, undulations and skewness. 6 Inspection rules
6.1 Products must be inspected and accepted by the factory technical inspection department before leaving the factory, and can only leave the factory after issuing a certificate of conformity or marking with relevant qualified marks. 6.2 Products should be 100% inspected for appearance quality. 6.3 Stainless steel products should be 100% inspected for spectral inspection. Marking, packaging, storage, rust prevention
7.1 Products should be cleaned and sealed with anti-rust oil and grease. 34
JB/T6296.392
7.2 The packaging should be in cartons, wooden boxes, etc., and the box should be lined with moisture-proof paper. The outside of the box should be marked with "rainproof", "moisture-proof", "handle with care", etc. 7.3 The product should be placed in a dry and clean warehouse, and it is not allowed to be stored in acidic, alkaline or other places that may cause product corrosion. 7.4 Under normal conditions, the anti-rust period of the product is 12 months. JB/T6296.3-92
Appendix A
Type and size of groove of chlorine arc welding butt welding (supplement)
A1 The type and size of the groove of the weld should be in accordance with the provisions of Figure A1 and Table A1. 37°30'±2°30
Inner diameter of steel pipe
Specifications of seamless steel pipe
Outer diameter multiplied by wall thickness
108×4
133×4
219×6
273×8
325×8
377×10
426×13
480×15|| tt||530×15
Inner diameter of cut
Inner length of cut of steel pipe
25.8±0.10
31.8±0.10
38.8±0.10
50.8±0.10
65.8±0.10
68.8±0.10
81.8±0. 10 | | tt | 00.8±0.20
4 50.8±0.20
500.8±0.20
For welding position, see schematic diagram A2
Additional instructions,
JB/T6296.3-92
This standard was proposed by Shanghai Power Equipment Complete Design Institute and is under the jurisdiction of welding ring
This standard was drafted by Nanjing Steam Turbine and Electric Motor Factory and Shanghai Power Equipment Complete Design Institute. The main drafters of this standard are Wang Xingbang, Ren Qihua and Fang Chonghua.
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