•  Product Features

     External pressure expansion joint contains one bellows connected to outer and inner tubes. the bellows is subjected to external pressure and has relatively more convolutions so that this kind of expansion joint can absorb considerably large axial movement.

•  Applicable Conditions

Working pressure: 0.1 through 2.5 (MPa)
Working temperature: -20 through 450 (℃)
Service life: 1000 (times)
Flange：GB、ANSI、JIS、DIN etc


• Product Specification

Nominal ID(DN): Φ50 through Φ600 (mm)

•  STRUCTURE

• Material

1.Bellow：Stainless steels 304 316L 321 254 309 Inconel625 31803 etc
2.Flange、weld Ends：Carbon steel Stainless steels etc
3.Tie rod Nuts：Carbon steel Stainless steels etc 

• The product code consists of following elements　

•  Guides for expansion Joint installation

1. The expansion joint shall be installed according to the engineering drawing of pipe line and the expansion joint installations
2. In order to insure proper function of any expansion joints, it is necessary that all pipe lines in which expansion joints are located be suitably guided and anchored. The guides and anchors must be installed strictly in accordance to relevant technical documentation. Please refer to the “guideline for installation of Expansion Joints” about the principle of using guides and anchors.
3. Since the bellows used in expansion joints are made of thin stainless steel sheets, special attention shall be paid when transporting, handing and welding to avoid damage of bellows caused by dents, scores, arc strikes and weld spatters.
4. Any foreign laterals in the bellows and pipes shall be removed to ensure the proper function of expansion joints before installation.
5. If the flow direction is specified, be sure to install expansion joint with the proper orientation with the respect of flow direction arrow.
6. No movement of the expansion joint (such as axial compression or extension, lateral offset, or rotation) due to piping misalignment shall be imposed during installation so as to ensure proper function of the bellows.

• Date sheet

Date Sheet
PN MPa	Product type	Nominal Diameter DN（mm）	Bellows effctive area A(CM2)	Convolution number （n）	Overall Length L(mm）	Axial Movement X(mm)	Axial Spring rate kX。 N／mm	Max Diameter B(mm)	End pipe doxS (mm)
0.6	6WDBl50 x 8—J	150	535	8	950	122	212	450	Φ159 x 4.5
	6WDBl50 x 16—J			16	1540	244	106
	6WDB200 x 8—J	200	779	8	950	120	247	505	Φ219 x 6
	6WDB200 x 16—J			16	1550	240	124
	6WDB250 x 8—J	250	1075	8	1080	154	220	566	Φ273 x 8
	6WDB250 x 16—J			16	1800	308	110
	6WDB300 x 8—J	300	1269	8	1090	153	245	600	Φ325 x 8
	6WDB300 x 16—J			16	1820	306	123
	6WDB350 x 8—J	350	1619	8	1090	151	271	655	Φ377 x 10
	6WDB350 x 16—J			16	1820	302	136
	6WDB400 x 8—J	400	2003	8	1110	149	299	710	Φ426 x 10
	6WDB400 x 16—J			16	1840	298	150
	6WDB450 x 8—J	450	2428	8	1110	146	326	768	Φ478 x 10
	6WDB450 x 16—J			16	1840	292	163
	6WDB500 x 6—J	500	3473	6	1475	159	540	975	Φ529 x 10
	6WDB500 x 12—J			12	2405	318	270
	6WDB600 x 6—J	600	4766	6	1540	160	530	1090	Φ630 x 10
	6WDB600 x 12—J			12	2540	320	265
	6WDB700 x 6—J	700	6068	6	1540	159	594	1190	Φ720 x 10
	6WDB700 x 12—J			12	2540	318	297
	6WDB800 x 6—J	800	7528	6	1540	157	688	1290	Φ820 x 10
	6WDB800 x 12—J			12	2540	314	344
	6WDB900 x 6—J	900	9328	6	1605	198	479	1460	Φ920 x 10
	6WDB900 x 12—J			12	2685	396	240
	6WDB1000 x 6—J	1000	11118	6	1605	196	517	1560	Φ1020 x 10
	6WDB1000 x 12—J			12	2685	392	259
1.0	10WDBl50 x 8—J	150	538	8	950	100	348	450	Φ159 x 4．5
	10WDBl50 x 16—J			16	1540	200	174
	10WDB200 x 8—J	200	783	8	950	97	421	505	Φ219 x 6
	10WDB200 x 16—J			16	1550	194	211
	10WDB250 x 8—J	250	1080	8	1080	126	359	566	Φ273 x 9
	10WDB250 x 16—J			16	1800	252	180
	10WDB300 x 8—J	300	1274	8	1090	124	407	600	Φ325 x g
	10WDB300 x 16—J			16	1820	248	204
	10WDB350 x 8—J	350	1625	8	1090	121	454	655	Φ377 x 10
	10WDB350 x 16—J			16	1820	242	227
	10WDB400 x 8—J	400	2009	8	1110	119	503	710	Φ426 x 10
	10WDB400 x 16—J			16	1840	238	252
	10WDB450 x 8—J	450	2435	8	1110	116	551	768	Φ478 x 10
	10WDB450 x 16—J			16	1840	232	276
	10WDBK500 x 6—J	500	3473	6	1475	146	1151	860	Φ529 x 10
	10WDBK500 x 12—J			12	2405	292	575
	10WDBK600 x 6—J	600	4766	6	1540	141	1527	975	Φ630 x 10
	10WDBK600 x 12—J			12	2540	282	764
	10WDBK700 x 6—J	700	6068	6	1540	147	1601	1075	Φ720 x 10
	10WDBK700 x 12—J			12	2540	294	800
	10WDBK800 x 6—J	800	7528	6	1540	148	1689	1175	Φ820 x 10
	10WDBK800 x 12—J			12	2540	296	845
	10WDBK900 x 6—J	900	9348	6	1605	223	1335	1460	Φ920 x 10
	10WDBK900 x 12—J			12	2685	446	667
	10WDBKl000 x 6—J	1000	11141	6	1605	223	1415	1560	Φ1020 x 10
	10WDBKl000 x 12—J			12	2685	446	707
1.6	16WDBl50 x 8—J	150	538	8	950	78	660	450	Φ159 x 4．5
	16WDBl50 x 16—J			16	1540	156	330
	16WDB200 x 8—J	200	783	8	950	75	809	505	Φ219 x 6
	16WDB200 x 16—J			16	1550	150	405
	16WDB250 x 9—J	250	1080	8	1080	98	678	566	Φ273 x 9
	16WDB250 x 16—J			16	1800	196	339
	16WDB300 x 9—J	300	1274	8	1090	96	738	600	Φ325 x 9
	16WDB300 x 16—J			16	1820	192	369
	16WDB350 x 8—J	350	1625	8	1090	94	837	655	Φ377 x 10
	16WDB350 x 16—J			16	1820	188	418
	16WDB400 x 8—J	400	2009	8	1110	91	934	710	Φ426 x 10
	16WDB400 x 16—J			16	1840	182	467
	16WDB450 x 8—J	450	2435	8	1110	90	1031	768	Φ478 x 10
	16WDB450 x 16—J			16	1840	180	516
	16WDBK500 x 6—J	500	3473	6	1475	140	1172	860	Φ529 x 10
	16WDBK500 x 12一J			12	2405	280	586
	16WDBK600 x 6一J	600	4766	6	1540	136	1560	975	Φ630 x 10
	16WDBK600 x 12—J			12	2540	272	780
	16WDBK700 x 6—J	700	6068	6	1540	141	1635	1075	Φ720 x 10
	16WDBK700 x 12—J			12	2540	282	817
	16WDBK800 x 6—J	800	7528	6	1540	142	1725	1175	Φ820 x 10
	16WDBK800 x 12一J			12	2540	284	863
	16WDBK900 x 6一J	900	9348	6	1605	214	1357	1460	Φ920 x 10
	16WDBK900 x 12—J			12	2685	428	678
	16WDBKl000 x 6—J	1000	11141	6	1605	214	1438	1560	Φ1020 x 10
	16WDBKl000 x 12—J			12	2685	428	719