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Single and axial type stainless steel bellows
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Single and axial type stainless steel bellows

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Description

Axial type stainless steel bellow is a kind of corrugated compensator. It is an equipment to compensate dimensional change caused by thermal expansion or mechanical vibration of pipeline/conduit/vessel through corrugated compensator's elastic component. Based on above, it can decrease the deforming stress on pipeline and increase service life of pipeline.

Structural material: Axial type stainless steel bellows can be made of metal and nonmetal. Usually, the material of metal one includes austenitic stainless steel, corrosion resistant alloy & etc. while nonmetal one including PTFE, rubber and composite material.

Wall thickness: Refer to the wall thickness, there are thick-wall corrugated compensator and thin-wall corrugated compensator. The thick one is mostly used for pressure vessel to compensate vessel's own thermal deformation. In view of its little compensation dosage, only 1~2 waves needed with wall thickness in 3~22mm generally. For the thin one, corrugated compensator is used in the flexible part of pipeline. Its monolayer thickness is less than 3mm (The thickness of most stainless steel is 0.2~3mm). Since corrugated compensator used in pipeline requires compensation dosage as much as possible, wall thickness should be reduced in max to get higher flexibility under premise of satisfying pressure-bearing. Considering environmental corrosion, most corrugated compensator is made of stainless steel. If higher pressure-bearing is requested, thin wall multilayer stainless-steel structure could be better.

Number of layers: According to the layer, axial type stainless steel bellows can be divided into single-ply bellows and multi-ply bellows. The manufacture of single-ply bellows is simple with low cost. It is often used in the condition of dead load together with displacement compensation. On the premise of satisfying design of pressure-bearing, compensation dosage, rigidity and fatigue life, single-ply bellows has better competitiveness. Multi-ply bellows (often more than 2 layers) are commonly used in crucial pipeline in the condition of alternating load. Compared with single-ply bellows, multi-ply one has less rigidity and better fatigue resistance under same pressure bearing.

 

 

Structure

No Name Material
1 Bellow Stainless steel( SS304(L),SS316(L),SS321,SS310 etc)
2 Flange Carbon steel or Stainless steel
3 End Carbon steel or Stainless steel
4 Inner Sleeve Carbon steel or stainless steel
5 Tie rods, nuts and washers Carbon steel or stainless steel

Grey color is alternative part.

 

Specification

DN No of Convolution Pressure Rating (bar) Effective Area
(cm²)
Max OD  (mm) Length   (mm)
inch mm 6 10 16 25
Axial  Movements(mm/ N/ram)
1 1/4 32 8 22/26 20/26 18/63 15/98 16 110 110
1 1/2 40 8 22/44 20/44 18/89 15/106 23 130 130
2 50 8 22/51 20/70 18/70 15/138 37 150 150
2 1/2 65 8 30/35 26/44 22/55 19/68 55 170 170
3 80 8 36/36 34/33 28/41 24/54 81 200 200
4 100 8 45/60 40/75 35/93 29/117 121 220 220
5 125 8 77/29 66/36 58/45 50/56 180 290 240
6 150 8 71/43 64/51 54/59 46/65 257 290 250
8 200 8 65/44 59/52 53/58 48/78 479 340 280
10 250 6 65/34 59/42 52/45 47/55 769 300 280
8 97/21 87/35 79/39 71/47 360 340
12 300 6 65/55   59/59 52/65 47/71 1105 340 330
8 97/35 87/37 79/41 71/45 400 380
14 350 6 65/62 59/67 52/74 47/81 1307 340 360
8 97/41 87/44 79/48 71/47 420 420
16 400 6 65/58 59/62 52/68 47/75 1611 340 360
8 97/39 87/43 79/47 71/52 420 420
18 450 6 97/35 87/37 79/41 71/45 1972 340 360
8 145/22 131/23 118/25 106/28 450 460
20 500 6 97/64 87/68 79/75 71/82 2445 340 450
8 145/37 131/39 118/43 106/48 450 520
24 600   6 97/80 87/85 79/94 71/103 3534 380 480
8 145/45 131/49 118/53 106/60 500 560
28 700 4 97/72 87/77 79/85 71/95 4717 1110 400
6 145/45 131/49 118/53 106/60 520
32 800 4 108/95 102/102 94/112 82/123 5822 1265 410
6 164/72 156/77 144/85 125/93 520
36 900 4 108/90 102/97 94/107 82/117 7620 1186 410
6 164/65 156/69 144/76 125/84 520
40 1000 4 108/98 102/105 94/116   9043 1286 410
6 164/65 156/71 144/81   520

Flange standards are alternative: DIN2501, BS EN1092, ASME, JIS,KS and other non standards.

Length and no of convolution can be customized

The max working pressure is 10 Mpa, the max working temperature is according to the material.

Corresponding parameter set not found, please add it in property template of background
暂未实现,敬请期待
暂未实现,敬请期待
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