DOZZ Expansion Bellow Hose & Joint Assemblies

Metal Bellows Expansion joints have been designed to absorb a specified amount of movement by flexing of the thin-gauge convolutions. If proper care is not taken during installation, it may reduce the cycle life and the pressure capacity of the Expansion joints which could result in an early failure of the bellows element or damage the piping systems. See table given below.

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Technical Specifications for DOZZ

Sr. No.	SIZE (N.B.)		BELLOWS (M.M.)		AXIAL Movement	Max. No. of Conv. /Bellows
	INCH	MM	I.D.	O.D.	MM/Conv.
1	2	50	60.3	78.3	1.5	20
2	2.1/2	65	73.1	93.1	2	18
3	3	80	88.9	110.9	2	15
4	4	100	114.3	138.3	3	15
5	5	125	141.3	165.3	3	15
6	6	150	168.3	192.3	3	15
7	8	200	219.1	255.1	4.5	10
8	10	250	273.1	309.1	4.5	10
9	12	300	323.9	360	4.5	10
10	14	350	356	408	6	10
11	16	400	407	459	6	10
12	18	450	457	509	6	10
13	20	500	508	560	6	10
14	22	550	559	611	6	10
15	24	600	610	678	8	6
	26	650
	to	to	Consult our Design Dept
	78	2000

Recommendation for Installation:

Yellow Shipping Rods are to be removed after installation and prior to pressura test of equipment.
Install assembly as per flow direction, if marked.
Remove any foreign material that may have become lodged between the convolutions
Protect bellows from weld spatter.
Do not use cleaning agent which contains chlorides.
Do not use steel wool and wire brush on the bellows membrane.
Do not stretch, compress or off-set the expansion joint to fit the piping system, other wise the expansion joint may be over stressed when the system is in service.
Do not exceed rated Test Pressure and Design Condition of the Expansion Joint.

Use only designated lifting lugs when provided, Lugs are normally provided in heavy design in large