Fabric Expansion Joints utilize a composite fabric material as the flexible element of the expansion joint. They are typically used in low pressure ducting applications to compensate for misalignment, vibration and thermal growth. Fabric expansion joints can be designed with composite fabric with integral insulating layers or separate insulation pillows to handle temperatures in excess of 1000˚F.
Fabric Expansion joints can used to compensate thermal growth in ducting and misalignment without the spring loads typically associated with metal expansion joints. Fabric expansion joints can also absorb large lateral movements or misalignments. Additional components, like flow liners, insulation blankets and accumulation barriers can be added to the fabric expansion joint depending on the application and service.

Single rectangular metal expansion joints have limited ability to absorb lateral offset or deflection. If lateral offset is a requirement a universal configuration is recommended or two single joints spaced apart. If the motion is limited to one plane, hinges or slotted hinges are frequently included. Slotted hinges have the benefit of stabilizing the expansion joint, limiting the axial travel and supporting the weight of adjacent ducting. The joint pictured is used in the exhaust stack of a ship. The rounded . ends are made from round expansion joints cut in half. This is the same technique is used to made round corners of rectangular expansion joints

Fabric Expansion Joint Types
Assembly: Belt Type or Flange Type
Shapes: Circular or Rectangular
Optional Features:

1. Liners (Drop in or Integral)
2. Insulation sleeves/ Accumulation barrier
3. Control rods

Standard Performance Data:
Temperature Range: -20˚F to 1200˚F
Pressure Range: -60in to 60in of water (H2O) column.
 

Specification of Rectangular	External Diameter of Pipe	A	B	11	K	C1	C2	t	t1	t2	t3	11	k	n1	n2	c1/c2	d	No.of bolts n
700×500	700×500	702	502	792	592	760	560	95	95	95	90	570	3		4	29/29	14	28
700×700	700×700		702		792		760				95		570		6			32
700×800	700×800		802	814	914	774	874	112	110	109	110	550	654	5	6	36/36	18	30
800×800	800×800	802		914	914	874	874	110	109			654	654	6	6			32
800×1200	800×1200		1202		1314		1274			116	115		1044		9			38
800×1600	800×1600		1602		1714		1674			119	123		1428		12			44
900×400	900×400	902	402	992	492	960	60	96	96	92	92	768	276	8	3	29/29	14	30
900×700	900×700		702		814	974	774	124	121	110	112	726	550	6	5	36/36	18	30
900×1200	900×1200		1202		1314		1274			110	11		1044		9			38
1000×600	1000×600	1002	602	1114	714	1074	674	117	120	112	113	840	448	7	4			30
1000×700	1000×700		702		814		774			110	112		550		5			32
1000×800	1000×800		802		914		974			109	110		654		6			31
1000×1000	1000×1000		1002		1114		1074			120	117		840		7			36
1200×600	1200×600	1202	602	1314	714	1274	674	115	116	112	113	1041	448	9	4			34
1200×700	1200×700		702		814		774			110	112		550		5			36
1200×800	1200×800		802		914		874			115	116		654		6			38
1200×1000	1200×1000		1002		1114		1074			120	117		840		7			40
1200×1200	1200×1200		1202		1314		1274			116	115		1044		9			41
1400×700	1400×700	1402	702	1514	814	1474	774	110	114	110	112	1254	550	11	5			40
1400×800	1400×800		802		914		874			109	110		654		6			42
1400×900	1400×900		902		1014		974			121	124		726		6
1400×1000	1400×1000		1002		1114		1074			120	117		840		7			44
1400×1210	1400×1210		1202		1314		1274			116	115		1044		9			48
1500×800	1500×800	1502	802	1614	914	1574	874	116	122	109	110	1342	654		6			42
1500×900	1500×900		902		1014		974			121	124		726
1500×1000	1500×1000		1002		114		1074			120	117		840		7			44
1500×1200	1500×1200		1202		1314		1274			116	115		10		9			48
1600×1000	1600×1000	1602	1002	1714	114	1674	1074	117	120	120	117	1440	840	12	7	36/36	18	46
1600×1200	1600×1200		1202		1314		1274			116	115		1044		9			50
1600×1400	1600×1400		1402	1728	1528	1678	1478	139	140	134	136	1400	1206	10		38/38	22	46
1600×1600	1600×1600		1602		1728		1678			140	139		1400		10			48
1800×900	1800×900	1802	902	1914	1014	1874	974	118	117	121	124	1638	726	14	6	36/36	18
1800×1000	1800×1000		1002		1114		1074			120	117		840		7			50
1800×1200	1800×1200		1202	1928	1328	1878	1278	135	134	142	142	1638	9914	12				46
1800×1400	1800×1400		1402		528		1478			134	136		1026		9			50
1800×1800	1800×1800		1802		1928		1878				135		1608		12			56
2000×1000	2000×1000		1004		1130		1080			135	135		810		6			46