DJ001 Dismantling Joint DN400 Carbon Steel
DJ001 is a DN400 dismantling joint made from carbon steel, designed for pipeline systems requiring periodic disassembly for maintenance, inspection or cleaning. It connects two pipe sections with a removable flange pair, allowing the joint to be opened without cutting or welding the line. The joint uses a bolted connection with a gasket seal and is built for medium- and low-pressure service in water, heating, and industrial applications.
| Model Code | DJ001 |
|---|---|
| Product Type | Dismantling Joint[DN400 Carbon Steel] |
| Category | Dismantling Joints |
| Manufacturer | Tianjin MIC Valve Co., Ltd. |
| Size and Pressure Rating | Confirmed on quotation |
| Certification | ISO 9001 and ISO 14001 certified plant |
| Model | DJ001 |
| Valve Type | Dismantling joint |
| Nominal Diameter | DN400 |
| Material | Carbon steel |
| Connection | Flanged, bolted joint with gasket seal |
| Pressure Rating | Confirmed on request based on line conditions |
| Series | DJ001 dismantling joint series |
What This Model Gives You
- Allows pipeline sections to be opened without cutting or welding, reducing downtime during maintenance
- Carbon steel body provides strength and durability for medium- and low-pressure industrial service
- Flanged connection with gasket seal ensures reliable leak-tight performance under repeated opening and closing
- Standard DN400 size fits common pipeline systems in water, heating, and industrial plants
- Part of a joint programme covering DN10 to DN2600, enabling consistent sizing across large systems
- Built in a factory certified to ISO 9001 and ISO 14001 for consistent quality and environmental control
Problems It Removes
- Welding or cutting pipe sections during maintenance causes downtime and increases risk of leaks
- Lack of standardised access joints leads to custom fabrication and inconsistent sealing performance
- Inconsistent joint sizes across a system make spare parts and maintenance planning difficult
- Non-reusable connections require replacement after each disassembly, increasing material cost
- Buyers need a single supplier who can provide joints across the full DN10 to DN2600 range
Where It Is Installed
- Maintenance access point in long-distance water supply lines where welding is not practical
- Inspection and cleaning of large-diameter heating or process pipelines in power and chemical plants
- Service access in industrial piping systems where regular component replacement is required
- Installation of flow meters or sensors in fixed pipeline runs without permanent welding
- Emergency repair access in municipal water distribution networks where quick disassembly is needed
Buyers It Suits
- Plant maintenance engineers specifying access joints for industrial piping systems
- Water utility operators needing non-destructive access points in large-diameter lines
- EPC contractors integrating dismantling joints into heating, power, or chemical plant packages
- Pipeline designers who require a standardised joint solution across multiple diameters
- Facility managers sourcing reliable, repeatable joints for scheduled maintenance routines
How It Is Built
- Dismantling joint with flanged ends for bolted connection between pipe sections
- Carbon steel body suitable for medium- and low-pressure applications
- Gasket seal between flanges for leak-tight performance
- Designed for DN400 nominal diameter with standard flange drilling
- Built for repeated opening and closing without degradation of seal or alignment
- Part of a joint product line covering DN10 to DN2600 mm and 0.05 to 4.0 MPa
Material Selection
- Body, flanges, bolts, and gasket materials are confirmed per order based on the operating medium and pressure
- Carbon steel is standard for this model; alternative materials are available on request
- Material certificates are issued with the order when requested
How It Is Made
- Carbon steel body cast and machined on in-house fine machining equipment
- Flanges drilled and machined to match standard flange patterns
- Gasket groove and bolt hole alignment checked before assembly
- Joint assembled with bolts and gasket, then pressure tested before packing
- Marked, wrapped, and crated for container shipment from Tianjin
How It Is Checked
- Dimensional check of flange bolt circle and bolt hole pattern before assembly
- Gasket seal integrity tested on the assembled joint under pressure
- Bolt tightening sequence verified to ensure even clamping force
- Testing carried out on the 10 sets of imported inspection and testing equipment
- Records maintained under the ISO 9001 quality management system
Certificates Issued With This Valve
- ISO 9001 quality management system certification
- ISO 14001 environmental management system certification
Certification statements are limited to the management system certificates the factory actually holds. Product-level approvals for your market are confirmed before order.
What Can Be Changed
- Flange standard and drilling pattern matched to the buyer's pipeline system
- Gasket material selected based on the medium and temperature on the line
- Optional coating or surface treatment for corrosion resistance on request
- Private label marking and packing available for OEM orders
- Mixed-diameter orders combined with other valves in one container
How It Compares With the Alternatives
| Welded flange joint | A welded joint is permanent and requires cutting for access; the dismantling joint allows repeated disassembly without damage |
|---|---|
| Lug type butterfly valve | A lug valve is used for isolation; the dismantling joint is designed specifically for access and maintenance, not flow control |
| Flanged pipe coupling | A coupling connects two pipes but cannot be opened for inspection; the dismantling joint includes a removable flange pair for access |
| Threaded joint | Threaded joints are not suitable for DN400 and cannot handle high pressure or repeated disassembly without wear |
Installing and Operating This Valve
- Confirm the flange standard and bolt pattern on both pipe ends before ordering
- Ensure the gasket is correctly seated and the flange faces are clean before bolting
- Tighten bolts in a cross pattern to ensure even clamping and prevent leakage
- Open the joint only after the system is depressurised and cooled to safe temperature
- Inspect the gasket and flange faces after each opening and replace if damaged
- Re-tighten bolts after the first system pressure cycle to ensure seal integrity
Related Models Industries and Guides
DJ001 Dismantling Joint DN400 Carbon Steel FAQ
What is the pressure rating for DJ001 DN400?
The pressure rating is confirmed on request based on the operating conditions and flange standard used on your line.
Can this joint be used on high-pressure lines?
It is designed for medium- and low-pressure service. The pressure rating is confirmed against your line data during quoting.
What materials are used in the body and gasket?
The body is carbon steel. The gasket material is selected based on the medium and temperature and confirmed during the quotation.
Is the flange drilling standard or custom?
The flange drilling is matched to the standard used on your pipeline system. We confirm the pattern during the order process.
Can it be supplied with a different material than carbon steel?
Yes. Alternative materials are available on request. We confirm the material combination during the quotation.
Do you supply larger or smaller sizes in this series?
Yes. The DJ dismantling joint series covers DN10 to DN2600 mm. Sizes outside DN400 are available on request.
What certifications does the factory hold?
Tianjin MIC Valve Co., Ltd. is certified to the ISO 9001 quality management system and the ISO 14001 environmental management system.
Get a Price for DJ001 Dismantling Joint DN400 Carbon Steel
Tell us the quantity, flange standard and the medium on your line. You get a quotation with a confirmed specification sheet, not a catalogue page.