Expansion Joint Manufacturer - Join Force Bellows Co. Ltd.

JF-400series (weld ends) Axial Expansion Joints
16bars	25bars
Multiply bellows welded to weld ends, with internal sleeve; tie-rods and external covers are optional. Designed to absorb axial movement of medium pressure/ temperature pipeline.	Multiply bellows welded to weld ends, with internal sleeve; tie-rods and external covers are optional. Designed to absorb axial movement of high pressure/ temperature pipeline.

JF-400 series (weld ends) Axial Expansion Joints
Size Range	DN15 ~ DN600 (1/2” ~ 24”)	DN15 ~ DN600 (1/2” ~ 24”)
Pressure/ Temperature rating	16bars at 120℃	25bars at 120℃
Cycle Life	Nc ＞ 1,000 times	Nc ＞ 1,000 times

Construction

No.	Parts	Standard Material	Optional Material
1	Bellows	S.S.304	S.S.316
2	Internal Sleeve	S.S.304	S.S.316
3	Tube Ends	Carbon Steel	S.S.304/ S.S.316
4	Tie Rods	Carbon Steel	S.S.304/ S.S.316
5	Lugs	Carbon Steel	S.S.304/ S.S.316
6	External Covers	Carbon Steel	S.S.304/ S.S.316

16bars

Size		OAL			Thickness of Weld Ends	Axial Movement	Axial Spring Rate	Effective Area
Size		400SP	400SPC 400SPG	400SPGC	Thickness of Weld Ends	Axial Movement	Axial Spring Rate	Effective Area
mm	ins	mm	mm	mm	mm	mm	N/mm	cm²
15	1/2	350	400	450	2.8	+10 -40	14	6
20	3/4	350	400	450	2.9	+10 -40	14	6
25	1	350	400	450	3.4	+10 -40	22	8
32	1 1/4	350	400	450	3.6	+10 -40	25	13
40	1 1/2	350	400	450	3.7	+10 -40	36	20
50	2	350	400	450	3.9	+10 -40	52	32
65	2 1/2	350	400	450	5.2	+10 -40	90	49
80	3	350	400	450	5.5	+10 -40	105	67
100	4	350	400	450	6.0	+10 -40	152	122
125	5	350	400	450	6.6	+10 -40	161	176
150	6	350	400	450	7.1	+10 -40	230	258
200	8	350	400	450	8.2	+10 -40	272	414
250	10	350	400	450	9.3	+10 -40	386	658
300	12	350	400	450	9.5	+10 -40	434	904
350	14	350	400	450	9.5	+10 -40	535	1171
400	16	350	400	450	9.5	+10 -40	688	1515
450	18	350	400	450	9.5	+10 -40	764	1886
500	20	350	400	450	9.5	+10 -40	1053	2324
550	22	350	400	450	9.5	+10 -40	1144	2779
600	24	350	400	450	9.5	+10 -40	1236	3274

※Other size, pressure rating, axial movement, and material are available on request

25bars

Size		OAL			Thickness of Weld Ends	Axial Movement	Axial Spring Rate	Effective Area
Size		400SP	400SPC 400SPG	400SPGC	Thickness of Weld Ends	Axial Movement	Axial Spring Rate	Effective Area
mm	ins	mm	mm	mm	mm	mm	N/mm	cm²
15	1/2	350	400	450	2.8	+10 -40	14	6
20	3/4	350	400	450	2.9	+10 -40	14	6
25	1	350	400	450	3.4	+10 -40	22	8
32	1 1/4	350	400	450	3.6	+10 -40	25	13
40	1 1/2	350	400	450	3.7	+10 -40	37	20
50	2	350	400	450	3.9	+10 -40	58	31
65	2 1/2	350	400	450	5.2	+10 -40	92	49
80	3	350	400	450	5.5	+10 -40	108	66
100	4	350	400	450	6.0	+10 -40	152	122
125	5	350	400	450	6.6	+10 -40	161	176
150	6	350	400	450	7.1	+10 -40	230	258
200	8	350	400	450	8.2	+10 -40	340	419
250	10	350	400	450	9.3	+10 -40	522	662
300	12	350	400	450	9.5	+10 -40	589	908
350	14	350	400	450	9.5	+10 -40	1035	1171
400	16	350	400	450	9.5	+10 -40	1031	1521
450	18	350	400	450	9.5	+10 -40	1146	1893
500	20	350	400	450	9.5	+10 -40	1578	2333
550	22	350	400	450	9.5	+10 -40	1714	2788
600	24	350	400	450	9.5	+10 -40	1853	3284

※Other size, pressure rating, axial movement, and material are available on request

JF-400SP