Dismantling Joint

Abrasion Resistant Pipe – Easy Installation & Maintenance

Dismantling joints for easy installation and removal of valves, pumps, and fittings.

Dismantling Joint Double Flanged Dismantling Joint Pipe Dismantling Joint Valve Installation Joint

Dismantling Joint

Abrasion Resistant Pipe – Easy Installation & Maintenance

Dismantling joints for easy installation and removal of valves, pumps, and fittings. carbon steel with epoxy coating, sizes dn50-dn2000, pn10/16. axial adjustment, vibration absorption, ideal for water, wastewater, and industrial pipelines.

What is a Dismantling Joint?

Dismantling joints are telescopic devices installed between flanged equipment and pipes to facilitate easy installation, removal, and maintenance without disturbing the pipeline. They absorb axial forces, allow length adjustment, and compensate for misalignment.

Essential for pump stations, valve chambers, and systems requiring frequent equipment access. Also known as expansion/dismantling fittings.

Key Features & Advantages

Easy Maintenance: Quick disassembly of valves/pumps without pipeline disruption.
Axial Adjustment: Telescopic design for ±50-100 mm movement (size dependent).
Secure Connection: Tie rods and double flanges ensure pressure containment.
Vibration Absorption: Reduces stress from pumps and machinery.
Corrosion Protection: Epoxy coating for long-term durability.

Technical Specifications

Parameter	Specification
Size Range	DN50–DN2000 (2"–80")
Pressure Rating	PN10 / PN16 / PN25
Material	Carbon Steel (Q235B); Epoxy Coated
Flange Standard	EN1092-2, BS4504, ANSI B16.5
Axial Adjustment	±50 mm (standard; larger available)
Gasket	EPDM or NBR
Tie Rods	Galvanized Carbon Steel
Coating	Fusion Bonded Epoxy (250-300 μm)
Temperature	-10°C to +80°C

Custom designs for higher pressure or special materials available.

Specification

No.	Name	Quantity	Material
1	Body	1	QT450-10, Q235A
2	Gasket	1	NBR
3	Follover	1	QT450-10, Q235A
4	Limited short pipe	1	Q235A
5	bolt	5	Q235A, 35#
6	nut	5	Q235A, 2#

Main data of dismantling joint

Nominal Diameter DN	External diameter of pipe Dw	Length		Flange connecting dimension
		Length		0.6Mpa				1.0Mpa
		L	L1	D	D1	n-Th	b	D	D1	n-Th	b
65	76	200	40	160	130	4-M12	16	185	145	4-M16	20
80	89			190	150	4-M16	18	200	160	8-M16	22
100	114			210	170	4-M16		220	180		24
125	140			240	200	8-M16	20	250	210		26
150	168			265	225			285	240	8-M20
200	219			320	280		22	340	295		28
250	273			375	335	12-M16	24	395	350	12-M20
300	325	220	50	440	395	12-M20	24	445	400
350	377			490	445	12-M20	26	505	460	16-M20	30
400	426			540	495	16-M20	28	565	515	16-M24	32
450	480			595	550	16-M20	28	615	565	20-M24
500	530			645	600	20-M20	30	670	620		34
600	630	240		755	705	20-M24	30	780	725	20-M27	36
700	720	240		860	810	24-M24	32	895	840	24-M27	40
800	820	350	60	975	920	24-M27	34	1015	950	24-M30	44
900	920			1075	1020	24-M27	36	1115	1050	28-M30	46
1000	1020			1175	1120	28-M27		1230	1160	28-M33	50
1200	1220	370		1405	1340	32-M30	40	1455	1380	32-M36	56
1400	1420	370		1630	1560	36-M33	44	1675	1590	36-M39	62
1600	1620	380		1830	1760	40-M33	48	1915	1820	40-M45	68
1800	1820	380		2045	1970	44-M36	50	2115	2020	44-M45	70
2000	2020	400		2265	2180	48-M39	54	2325	2230	48-M45	74
2200	2220			2475	2390	52-M39	60	2550	2440	52-M52	80
2400	2420			2685	2600	56-M39	62	2760	2650	56-M52	82
2600	2620	450	80	2905	2810	60-M45	64	2960	2850	60-M52	88
2800	2820			3115	3020	64-M45	68	3180	3070	64-M52	94
3000	3020			3315	3220	68-M45	70	3405	3290	68-M56	100
3200	3220			3525	3430	72-M45	76