PRODUCTS | METAL BELLOWS

Single Ply Metal Bellows

Single-ply bellows are made up of a single tube of sheet metal of a defined thickness. Single ply bellows are particularly designed for low pressure, high spring rate applications (<50PSIG at 1000 F) where the single thin sheet metal is enough to withstand the design criteria. When Cycle life of single ply bellows is low in comparison to multiply bellows due to its higher spring rate. 

For example, if we consider 2 bellows of the same size (6” in this case), one made up of a single ply of 0.02” thick Stainless Steel and another made up of 2 plys of 0.01” sheets, we see that the spring rate is 3.8x higher for the single ply material. 

Bellows Systems Inc has vast range of material types in manufacturing Bellows that includes both Ferrous Materials (304 SS,321 SS,304L SS,347 SS,310 SS,316 SS,316L) and Non-Ferrous Materials (Inconel 600, Inconel 601, Inconel 625, Incoloy 800, Incoloy 800H, Incoloy 825, Hasteloy C-276, Nickel 200, Monel 400)

Single-ply metal bellows used in BSI standard expansion joints are made in for all possible lengths and pipe sizes from 1” in diameter all the way up to 40”. All the Single Ply metal bellows manufactured in BSI are in accordance with the Expansion Joint Manufacturers Association (EJMA) guidelines latest edition.

With Bellows Systems Inc, making a custom single ply bellow is never a problem. Bellows systems has AWS B2.1 certified TIG Welders for custom bellows and AWS D17.1 certified GTAW weld operators for all aerospace bellows. 

Single Ply Metal Bellow

Nom Pipe SizeBSI Part NumberBellows ODOALNo. Of ConsMaterial
4960-010-45455.34.58Stainless Steel
18960-002-181020.039.513Inconel
20960-002-201022.049.513Inconel
6960-010-66527.755.256Stainless Steel
8960-010-867610.112.514Stainless Steel
10960-011-111212.112.516Stainless Steel
12960-011-131214.4512.512Stainless Steel
4960-112-04055.34.62514Stainless Steel
4.5960-112-05126.1212.2520Stainless Steel
6960-112-06057.85.37512Stainless Steel
8960-112-0808107.62516Stainless Steel
10960-112-100812.237.62516Stainless Steel
12960-112-120814.257.62512Stainless Steel
14960-112-140815.87.62510Stainless Steel
16960-112-160817.87.62510Stainless Steel
18960-112-180820.28.2510Stainless Steel
12960-303-081114.257.62512Stainless Steel