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China Suppliers Factory Dismantling Joint for Pumps, Valves & Pipeline Connection Solutions
Description
The Dismantling Joint is a crucial pipe fitting designed to provide flexibility during the installation and maintenance of pipeline systems. Installed between two fixed flanges, this joint allows easy dismantling, alignment, and replacement of valves, pumps, or meters without stressing the pipework.
Our dismantling joints are widely used in municipal water supply, sewage treatment, industrial fluid networks, and building services. The adjustable length compensates for misalignments, thermal expansion, and other system variations, making it essential for systems that require frequent inspection or future upgrades.
Constructed with high-strength ductile iron or carbon steel and coated with anti-corrosion epoxy, each dismantling joint is engineered to withstand harsh environments, internal pressure, and mechanical stress. Sealing gaskets and bolts are carefully selected to ensure leak-free operation.
Available in a range of sizes and pressure classes (PN10, PN16, PN25), our dismantling joints comply with international standards such as ISO and EN, and are compatible with butterfly valves, gate valves, and other flange-mounted equipment.
As one of China's leading valve and fitting manufacturers, we provide dependable products for engineering projects around the globe. With strict quality control and fast delivery, our dismantling joints are trusted by engineers, contractors, and utility companies worldwide.
Our dismantling joints are widely used in municipal water supply, sewage treatment, industrial fluid networks, and building services. The adjustable length compensates for misalignments, thermal expansion, and other system variations, making it essential for systems that require frequent inspection or future upgrades.
Constructed with high-strength ductile iron or carbon steel and coated with anti-corrosion epoxy, each dismantling joint is engineered to withstand harsh environments, internal pressure, and mechanical stress. Sealing gaskets and bolts are carefully selected to ensure leak-free operation.
Available in a range of sizes and pressure classes (PN10, PN16, PN25), our dismantling joints comply with international standards such as ISO and EN, and are compatible with butterfly valves, gate valves, and other flange-mounted equipment.
As one of China's leading valve and fitting manufacturers, we provide dependable products for engineering projects around the globe. With strict quality control and fast delivery, our dismantling joints are trusted by engineers, contractors, and utility companies worldwide.
Advantages of Dismantling Joint
- 1 Installation is simple and convenient, convenient valve installation.
- 2 Rubber is strong in compression and elasticity.
- 3 Metal and sealing rings are highly stringent.
- 4 In the pipeline, it can effectively compensate and ease the pipe and blind plate thrust.
Standard of Implementation
| Category | Details |
| Type | Flange |
| Face to Face | API609, BS5155, DIN3202, ISO5752 |
| Flange | DIN, BS, UNI, ISO, ANSI, AS, JIS |
| Mounting Flange | ISO5211 |
| Working Pressure | PN16 (200PSI) |
| Application | HVAC, Water Supply & Sewage, Food & Beverage, Chemical/petrochemical/processing, Power and Utilities, Paper and Pulp, Ship Building |
Standard Materials Of Main Parts
| ITEM | PART NAME | MATERIAL |
| 1 | FLANGE | Carbon Steel |
| 2 | SEALING RING | NBR |
| 3 | GLAND | Carbon Steel |
| 4 | PIPE | Carbon Steel |
| 5 | BOLT | Carbon Steel 8.8 GRADE |
Dimensions: (mm)
| Size | D | K | n x d | D | D |
| Dn50 | 160 | 125 | 4*18 | 200 | ±20 |
| Dn65 | 180 | 145 | 4*18 | 200 | ±20 |
| Dn80 | 195 | 160 | 4*18 | 200 | ±20 |
| Dn100 | 215 | 180 | 8*18 | 200 | ±20 |
| Dn125 | 245 | 210 | 8*18 | 200 | ±20 |
| Dn150 | 280 | 240 | 8*23 | 200 | ±20 |
| Dn200 | 335 | 195 | 12*23 | 200 | ±20 |
| Dn225 | 365 | 325 | 12*23 | 200 | ±20 |
| Dn250 | 405 | 355 | 12*26 | 200 | ±20 |
| Dn300 | 460 | 410 | 16*26 | 220 | ±25 |
| Dn350 | 520 | 470 | 16*26 | 220 | ±25 |
| Dn400 | 580 | 525 | 16*30 | 220 | ±25 |
| Dn450 | 640 | 585 | 20*30 | 220 | ±25 |
| Dn500 | 715 | 650 | 20*34 | 220 | ±25 |
| Dn600 | 840 | 770 | 20*36 | 240 | ±25 |
| Dn700 | 910 | 840 | 24*36 | 240 | ±25 |
| Dn800 | 1025 | 950 | 24*39 | 350 | ±30 |
| Dn900 | 1125 | 1050 | 28*39 | 350 | ±30 |
| Dn1000 | 1255 | 1170 | 28*42 | 350 | ±30 |
| Dn1200 | 1485 | 1390 | 32*48 | 370 | ±30 |
| Dn1400 | 1685 | 1590 | 36*48 | 370 | ±30 |
| Dn1600 | 1930 | 1820 | 40*55 | 380 | ±30 |
| Dn1800 | 2130 | 2100 | 44*55 | 380 | ±30 |
| Dn2000 | 2345 | 2230 | 48*60 | 400 | ±30 |
Frequently Asked Questions
Q What is a dismantling joint used for?
A dismantling joint is a pipe fitting installed between two fixed flanges to allow easy removal, alignment, and replacement of inline equipment such as valves, pumps, and meters — without the need to cut or stress the surrounding pipework.
Q What materials are dismantling joints made from?
Our dismantling joints are constructed from high-strength ductile iron or carbon steel, coated with anti-corrosion epoxy. Sealing rings are made from NBR rubber, and bolts are carbon steel Grade 8.8, ensuring durability and leak-free performance.
Q What pressure ratings are available for dismantling joints?
Our dismantling joints are available in multiple pressure classes including PN10, PN16, and PN25. The standard working pressure is PN16 (200 PSI), suitable for most municipal and industrial pipeline applications.
Q What international standards do your dismantling joints comply with?
Our dismantling joints comply with internationally recognized standards including ISO, EN, DIN, BS, ANSI, and API609. Flanges are compatible with DIN, BS, UNI, ISO, ANSI, AS, and JIS standards, and mounting flanges meet ISO5211.
Q What size range is available for dismantling joints?
We offer dismantling joints from DN50 up to DN2000, covering a wide range of pipeline diameters for both small building services installations and large-scale municipal or industrial infrastructure projects.
Q What industries commonly use dismantling joints?
Dismantling joints are widely used across HVAC systems, municipal water supply and sewage treatment, food and beverage processing, chemical and petrochemical plants, power and utility facilities, paper and pulp mills, and shipbuilding industries.

















