Zirconium alloy stainless Steel Transition Pipes Joint

 Tip: Click on the image to enlarge
Zirconium alloys (zirconium-2, zirconium-4, zirconium-2.5 niobium, zirconium-1 niobium, etc.) have excellent nuclear properties and are indispensable structural materials for the atomic energy industry. In order to save this rare and precious metal material and reduce the cost of construction in the nuclear industry, zirconium alloy tubes can be used in the reactor and cheap stainless steel tubes can be used outside the reactor. As a result, two different physical and chemical properties of pipe fittings were generated. The Explosive Welded Zirconium alloy stainless steel pipe joint can solve this problem. The zirconium alloy pipe part of the pipe joint shall be welded with the zirconium alloy pipe and placed in the team; the stainless steel pipe part of the pipe joint shall be welded with the stainless steel pipe and placed outside the pile. This kind of pipe joint has important technical and economic value.

锆合金-不锈钢管接头
  
Tensile and shear properties of zirconium -2+ stainless steel composite pipes
No. Zr-2  Cladding pipe /mm 1Cr18Ni9Ti
Base pipe
Wg/
(g.cm-2)
h0/mm Heat treatment Σbt/MPa
TNT t/℃ t/min
1 Ø42.0×1.5×125 Ø50.0×3.4×120 0.50 0.60 300 1440 372
2 Ø42.0×1.5×125 Ø50.0×3.4×120 0.50 0.60 400 1440 404
3 Ø42.0×1.5×125 Ø50.0×3.4×120 0.50 0.60 500 30 149
4 Ø42.0×1.5×125 Ø50.0×3.4×120 0.50 0.60 600 30 149
5 Ø42.5×1.6×125 Ø50.0×3.0×120 0.55 0.55     333
6 Ø42.5×1.6×125 Ø50.0×3.0×120 0.55 0.65     343
7 Ø43.0×1.75×120 Ø50.0×2.7×110 0.48 0.75     342
8 Ø46.0×2.9×155 Ø65.0×8.0×150 0.424 1.50     387
9 Ø46.0×2.9×155 Ø65.0×8.0×150 0.424 1.50     383
10 Ø46.0×2.9×155 Ø65.0×8.0×150 0.565 1.50     387
11 Ø46.0×2.9×155 Ø65.0×8.0×150 0.565 1.50     383
12 Ø42.0×1.5×125 Ø50.0×3.4×120 0.50 0.60 Thermal cycle: 250 ℃, 3min, water cooling, 500 times 250 ℃instantaneous shear. 404
13 Ø42.0×1.5×125 Ø50.0×3.4×120 0.50 0.60 404
14 Ø42.0×1.5×125 Ø50.0×3.4×120 0.50 0.60 321
15 Ø42.0×1.5×125 Ø50.0×3.4×120 0.50 0.60 245
16 Ø42.0×1.5×125 Ø50.0×3.4×120 0.50 0.60 245
17 Ø42.0×1.5×125 Ø50.0×3.4×120 0.50 0.60 236
 
 
Flexural properties of zirconium -2+ stainless steel composite pipes
No. Zr-2 Cladding pipe /mm 1Cr18Ni9Ti
Base Pipe
Wg/
(g.cm-2)
h0/mm Heat treatment α /(°)
TNT t/℃ t/min Bending inside Bending Outside
1 Ø46.0×2.9×155 Ø65.0×8.0×150 0.565 1.50       >100
2 Ø46.0×2.9×155 Ø65.0×8.0×150 0.565 1.50       >100
3 Ø46.0×2.9×155 Ø65.0×8.0×150 0.424 1.50       >100
4 Ø46.0×2.9×155 Ø65.0×8.0×150 0.424 1.50       >100
5 Ø42.0×1.5×125 Ø50.0×3.4×120 0.50 0.60 600 30 >100  
6 Ø42.0×1.5×125 Ø50.0×3.4×120 0.50 0.60 600 30 >100  
7 Ø42.0×1.5×125 Ø50.0×3.4×120 0.50 0.60 600 30   >100
8 Ø42.0×1.5×125 Ø50.0×3.4×120 0.50 0.60 600 30   >100
9 Ø42.0×1.5×125 Ø50.0×3.4×120 0.50 0.60 600 30 >100  
10 Ø42.0×1.5×125 Ø50.0×3.4×120 0.50 0.60 600 30 >100  
11 Ø42.0×1.5×125 Ø50.0×3.4×120 0.50 0.60 600 30   >100
12 Ø42.0×1.5×125 Ø50.0×3.4×120 0.50 0.60 600 30   >100
13 Ø42.0×1.5×125 Ø50.0×3.4×120 0.50 0.60 Thermal cycle:250℃,3min,water cooling,500times >100  
14 Ø42.0×1.5×125 Ø50.0×3.4×120 0.50 0.60 >100  
15 Ø42.0×1.5×125 Ø50.0×3.4×120 0.50 0.60   >100
16 Ø42.0×1.5×125 Ø50.0×3.4×120 0.50 0.60   >100
 
The zirconium -2+ stainless steel pipe produced by explosive welding has two box joint area structure, mechanical properties and corrosion resistance. The lap joint made of it can be used in nuclear engineering.