Type E (Spherical) Expansion Joint

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Pipe Expansion Joints

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Technical Specifications for Type E (Spherical) Expansion Joints

Product Introduction

E-type spherical joints (also known as spherical expansion joints) primarily rely on the angular displacement of the sphere to absorb or compensate for lateral displacement in one or more directions along the pipeline. These joints can be used in pairs to effectively enhance the pipeline’s compensation capacity. They can also serve as universal joints for pipelines, connecting to the pipeline via flanges. They offer advantages such as large compensation capacity, low fluid resistance, minimal space occupation, low deformation stress, no plate forces, and reduced reaction forces on fixed supports. Furthermore, carbon fiber sealing technology can be employed to make the equipment’s sealing performance even more stable and reliable; even if leaks occur after prolonged operation, users can perform maintenance without needing to shut off gas or water supply or reduce pressure—making the process highly convenient and efficient.

This product is suitable for pipeline connections in areas with significant ground subsidence, intense vibrations, and complex terrain. After installation on the pipeline, the joint’s spherical body can freely rotate within a specified angular range—refer to the following table for deflection values—around the pipeline’s centerline to compensate for bending caused by foundation settlement and thermal expansion and contraction.

This product complies with the technical requirements of GB/T 12465–2017.

Structure and Material

Type E (Spherical) Expansion Joint Technical Parameters (PN 0.6 MPa)

Nominal Diameter Nominal Dia.DN	Flange connection dimensions PN = 0.6 MPa					Sealing surface d	External dimensions		Flexibility/ (°)
	Flange outer diameter D	Center distance of hole K	Bolt hole diameter d.	Bolt			Outer diameter of the press cover D0	Total length L
	Flange outer diameter D	Center distance of hole K	Bolt hole diameter d.	n/each	Th		Outer diameter of the press cover D0	Total length L
100	210	170	18	4	M16	144	282	290	15
150	265	225		8		199	346	320
200	320	280		8		254	410	382
250	375	335		12		309	464	410
300	440	395	22		M20	363	535	430
350	490	445				413	607	470
400	540	495		16		463	668	550
450	595	550		16		518	728	600
500	645	600		20		568	798	689
600	755	705	26	20	M24	667	918	725
700	860	810	26	24	M24	772	1056	800
800	975	920	30		M27	878	1160	893
900	1075	1020				978	1310	920
1000	1175	1120		28		1078	1443	975
1200	1045	1340	33	32	M30	1295	1693	1125	13
1400	1630	1560	36	36	M33	1510	1942	1290
1600	1830	1760	36	40	M33	1710	2164	1385
1800	2045	1970	39	44	M36	1918	2400	1580	10
2000	2265	2180	42	48	M39	2125	2730	1870
2200	2475	2390		52		2335	2910	1950
2400	2685	2600		56		2545	3135	2080

Type E (Spherical) Expansion Joint Technical Parameters (PN 1.0 MPa)

Nominal Diameter Nominal Dia.DN	Flange connection dimensions PN = 1.0 MPa					Sealing surface d	External dimensions		Flexibility/ (°)
	Flange outer diameter D	Center distance of hole K	Bolt hole diameter d₀	Bolt			Outer diameter of the press cover D0	Total length L
	Flange outer diameter D	Center distance of hole K	Bolt hole diameter d₀	n/each	Th		Outer diameter of the press cover D0	Total length L
100	220	180	18	8	M16	156	282	290	15
150	285	240	22		M20	211	346	320
200	340	295				266	410	382
250	395	350		12		319	464	410
300	445	400		12		370	535	430
350	505	460		16		429	607	470
400	565	515	26	16	M24	480	668	550
450	615	565		20		530	728	600
500	670	620				582	798	689
600	780	725	30		M27	682	918	725
700	895	840	30	24	M27	794	1056	800
800	1015	950	33	24	M30	901	1160	893
900	1115	1050	33	28	M30	1001	1310	920
1000	1230	1160	36	28	M33	1112	1443	975
1200	1455	1380	39	32	M36	1328	1693	1125	13
1400	1675	1590	42	36	M39	1530	1942	1290
1600	1915	1820	48	40	M45	1750	2164	1385
1800	2115	2020	48	44	M45	1950	2400	1580	10
2000	2325	2230	48	48	M45	2150	2730	1870
2200	2550	2440	56	52	M52	2370	2910	1950
2400	2760	2650	56	56	M52	2570	3135	2080

Type E (Spherical) Expansion Joint Technical Parameters (PN 1.6 MPa)

Nominal Diameter Nominal Dia.DN	Flange connection dimensions PN = 1.6 MPa					Sealing surface d	External dimensions		Flexibility/ (°)
	Flange outer diameter D	Center distance of hole K	Bolt hole diameter do	Bolt			Outer diameter of the press cover D0	Total length L
	Flange outer diameter D	Center distance of hole K	Bolt hole diameter do	n/each	Th		Outer diameter of the press cover D0	Total length L
100	220	180	18	8	M16	156	282	290	15
150	285	240	22	8	M20	211	346	320
200	340	295	22	12	M20	266	410	382
250	405	355	26		M24	319	464	410
300	460	410				370	535	430
350	520	470		16		429	607	470
400	580	525	30	16	M27	480	668	550
450	640	585	30	20	M27	548	728	600
500	715	650	33	20	M30	609	798	689
600	840	770	36	20	M33	720	918	725
700	910	840	36	24	M33	794	1056	800
800	1025	950	39		M36	901	1160	893
900	1125	1050	39		M36	1001	1310	920
1000	1255	1170	42	28	M39	1112	1443	975
1200	1485	1390	48	32	M45	1328	1693	1125	13
1400	1685	1590	48	36	M45	1525	1890	1200
1600	1930	1820	55	40	M52	1750	2093	1200
1800	2130	2020	55	44	M52	1950	2292	1200
2000	2345	2230	60	44	M52	2150	2490	1200
2200	2480	2450	62	48	M58	2380	2870	1200
2400	2690	2680	64	48	M58	2610	2893	1200

Type E (Spherical) Expansion Joint Technical Parameters (PN 2.5 MPa)

Nominal Diameter Nominal Dia.DN	Flange connection dimensions PN = 2.5 MPa					Sealing surface d	External dimensions		Flexibility/ (°)
	Flange outer diameter D	Center distance of hole K	Bolt hole diameter do	Bolt			Outer diameter of the press cover D0	Total length L
	Flange outer diameter D	Center distance of hole K	Bolt hole diameter do	n/each	Th		Outer diameter of the press cover D0	Total length L
100	235	190	23	8	M20	160	282	290	15
150	300	250	26	8	M24	218	346	320
200	360	310	26	12	M26	278	410	382
250	425	370	30	12	M27	302	464	410
300	485	430	30	16	M27	390	535	430
350	550	490	34	16	M30	448	607	470
400	610	550	36	16	M30	505	668	550
450	660	600	36	20	M30	555	728	600
500	730	660	36	20	M36	610	798	689
600	840	770	41	20	M36	718	918	725
700	955	875	42	24	M42	815	1056	800
800	1070	990	48	24	M42	930	1160	893
900	1180	1090	48	28	M48	1025	1310	920
1000	1305	1210	55	28	M52	1140	1443	975
1200	1524	1420	55	32	M52	1350	1693	1125	13
1400	1750	1640	60	36	M56	1560	1890	1200
1600	1975	1860	60	40	M56	1780	2093	1200
1800	2195	2070	68	44	M64	1985	2292	1200
2000	2425	2300	68	48	M64	2210	2490	1200
2200	2650	3520	72	50	M68	2435	2870	1400
2400	2850	2750	72	50	M68	2545	2893	1400

	Name Name	Quantity Quantity	Materials Material
1	Spherical shell Spherical shell	1	Carbon steel (Q235A) or ductile iron (QT400-15)
2	Seal/Filler Sealingring/Filler	1	Natural rubber (NR) Nitrile rubber (NBR) or chloroprene rubber (CR)
3	Pressing Cap Follower	1	Carbon steel (Q235A) or ductile iron (QT400-15)
4	Stud Student	n	Carbon steel (Q235A) or stainless steel
5	Nut	n	Carbon steel (Q235A) or stainless steel
6	Sphere Sphere	1	Carbon steel (Q235A) or ductile iron (QT400-15)