BELLOWS - RECOMMENDED INSTALLATION INSTRUCTION

RECOMMENDED INSTALLATION INSTRUCTION

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 system. See table given below.

Recommendation for Installation

	Yellow Shipping Rods are to be removed after installation and prior to pressure test of equipment.
	Install assembly as per flow direction, if marked.
	Remove any foreign material that may have become lodged between the convolution.
	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 size.

The table below outlines our standard design specification. For specific or non-specific enquiries, our Design Department will be pleased to guide you in your selection, upon receipt of detailed specification.

Sr. No	Size (N.B.)				Bellows (M.M)		Axial Movement mm/Convolution.	Max. No. Of Convolution./Bellows
	Inch		MM		I.D.	O.D.
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	16
4	4		100		114.3	138.3	3	16
5	5		125		141.3	165.3	3	16
6	6		150		168.3	192.3	3	16
7	8		200		219.1	255.1	4.5	14
8	10		250		273.1	309.1	4.5	14
9	12		300		323.9	360	4.5	14
10	14		350		356	408	6	12
11	16		400		407	459	6	12
12	18		450		457	509	6	12
13	20		500		509	561	6	12
14	22		550		559	611	6	12
15	24		600		610	680	8	10
	26 to 200	}	650 to 5000	}	Consult our Design Department

E MAIL: sigmaflex.bellows@gmail.com, sigma@sigmabellows.com