Name: Axial Expansion Joints
Brand: JOIN FORCE Bellows Co. Ltd.
SKU: JF-250ST

JF-250 series (Screw Ends) Axial Expansion Joints
One-ply bellows welded to screw ends, with internal sleeve; tie-rods and external covers are optional. Axial Expansion Joints are designed to absorb axial movement of medium and/ or low pressure/ temperature pipeline.

Axial Expansion Joints – JF-250 series (Screw Ends)
Size Range	DN15 ~ DN100 (1/2” ~ 4”)
Pressure/ Temperature rating	10bars at 120℃
Cycle Life	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	Flange	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		250ST	250STC	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	350	2.8	+10 -25	13	4
20	3/4	250	300	350	2.9	+10 -25	19	6
25	1	250	300	350	3.2	+10 -25	28	9
32	1 1/4	350	400	450	3.5	+10 -40	18	13
40	1 1/2	350	400	450	3.5	+10 -40	22	21
50	2	350	400	450	3.8	+10 -40	29	32
65	2 1/2	350	400	450	4.2	+10 -40	46	50
80	3	350	400	450	4.2	+10 -40	53	67
100	4	350	400	450	4.5	+10 -40	76	123

※Axial Expansion Joints are available in differnt size and differnt material.

JF-250ST

Axial Expansion Joints