Axial Metal Joint

JF-250 series Weld Ends Axial Expansion Joint
One-ply bellows welded to pipe nipples, with internal sleeve; tie-rods and external covers are optional. Designed to absorb axial movement of low/ medium pressure/ temperature pipeline.

JF-250 series (weld ends) Axial Expansion Joints
Size Range	DN15 ~ DN600 (1/2” ~ 24”)
Pressure/ Temperature rating	10 kg/cm² at 120℃
Cycle Life	Nc ＞ 1,000 times

Construction

No.	Parts	Material	Option
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

Size		OAL			Thickness of Weld Ends	Axial Movement	Axial Spring Rate	Effective Area
Size		250SP	250SPC	250STG	Thickness of Weld Ends	Axial Movement	Axial Spring Rate	Effective Area
mm	ins	mm	mm	mm	mm	mm	N/mm	cm²
15	1/2	250	300	300	2.8	+10 -25	8	4
20	3/4	250	300	300	2.9	+10 -25	11	6
25	1	250	300	300	3.2	+10 -25	17	9
32	1 1/4	350	400	400	3.5	+10 -40	18	13
40	1 1/2	350	400	400	3.5	+10 -40	23	21
50	2	350	400	400	3.8	+10 -40	29	32
65	2 1/2	350	400	400	4.2	+10 -40	46	50
80	3	350	400	400	4.2	+10 -40	53	67
100	4	350	400	400	4.5	+10 -40	76	123
125	5	350	400	400	4.5	+10 -40	81	177
150	6	350	400	400	5.0	+10 -40	116	259
200	8	350	400	400	5.8	+10 -40	137	415
250	10	350	400	400	6.6	+10 -40	194	661
300	12	350	400	400	6.9	+10 -40	218	907
350	14	350	400	400	7.1	+10 -40	369	1167
400	16	350	400	400	7.1	+10 -40	465	1509
450	18	350	400	400	7.1	+10 -40	518	1880
500	20	350	400	400	7.1	+10 -40	819	2326
600	24	350	400	400	7.1	+10 -40	971	3276

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

JF-250SP