Dismantling Joint Manufacturer
Judberd is a competitive Chinese manufacturer specializing in dismantling joints. With 30 years of experience in designing and manufacturing various types of dismantling joints for water, oil, and gas industries.
Dismantling joint is an essential component of a pipeline. When it becomes necessary to repair or replace crucial elements of the pipeline, such as valves, water meters, flow meters, and more, a gap needs to be created between the flange of these components and the pipeline. Then dismantling joint is needed, as it is a unique product designed specifically to facilitate the creation of this gap.This gap was generated by telescopic dismantling joint’s own length.
A dismantling joint consists of one flange spigot and one flange adaptor. As the flange spigot moves towards the flange adaptor, the length of the flange spigot enters the interior of the flange adaptor, then the length of the dismantling joint becomes shorter. When the flange spigot moves in the opposite direction from the flange adaptor, the length of the flange spigot comes out of the flange adaptor, and the length of the dismantling joint becomes longer. judberd has designed the dismantling joint with adjustable length 50mm, unless the customer has special requirements or the dimensions of the dismantling joint are special.
For neutral fluids such as water, oil, or gas at ambient temperature, a regular FBE coating is suitable. For corrosive or high-temperature substances, special surface treatments are required. For seawater, the interior can be lined with Ebonite and the exterior should be coated with corrosion-resistant paint or with Epoxy Glass Flake Coating inside and outside. For highly acidic liquids, corrosion-resistant nylon 11 is the best choice. For liquids above 100°C, a high temperature resistant epoxy powder must be used,For Impurity-rich pipeline, abrasion-resistant polyurethane inside lining should be used.
If the working pressure rating of your pipeline is ≤ 25bar, a ductile iron dismantling joint is the best choice due to its wide applicability, corrosion resistance, and competitive price. However, if the working pressure rating is ≥ 40bar, you need to choose a steel dismantling joint to withstand high pressure. The material of the steel can be carbon steel, stainless steel, or other alloy steel.
In North American countries such as the United States, Canada, and Mexico, AWWA209 standard dismantling joints are used. In Australia, New Zealand, and Fiji, AS/NZS2280 standard dismantling joints are used. The rest of the countries use dismantling joints according to the EN545 standard. Some new projects in Saudi Arabia also started using American standard dismantling joints recently.
Regardless of the standard, design, material, or surface coating for dismantling joints, Judberd can provide the right dismantling joint based on our 30 years of R&D experience. Both OEM and ODM are welcome.
Heavy Duty
Material Ductile Iron
Standard AWWA C219
Pressure ANSI Class150
Series No. DJ002
Light Duty
Material Ductile Iron
Standard EN545/AWWA C209/AS/NZS2280
Small size design(from DN50 to DN600)
Series No. DJ004
Light Duty
Material Ductile Iron
Standard EN545/AWWA C209/AS/NZS2280
Big size design(from DN700 to DN2000)
Series No. DJ005
Heavy Duty
Material Carbon steel
Standard EN545/AWWA C209/AS/NZS2280
Pressure from PN10 to PN100, from class 125 to class 600
Series No. DJ006
Professional R&D Team
Our professional design team can provide recommendations for suitable products based on customers' local standards. Additionally, if customers have specific requirements regarding dismantling joint dimension, material, surface treatment, or other factors, we are capable of accommodating those needs
Suitable for high temperature and corrosive material
Our dismantling joint is designed to meet the requirements of special fluids or gases, including high temperatures, corrosiveness, and more. With our extensive experience, we are committed to satisfying our customers' needs.
Good Quality
We are dedicated to consistently producing high-quality dismantling joints. To ensure optimal performance, we meticulously machine nearly every surface of our dismantling joints.We supply our dismantling joint for many famous brands.
Competitive Price
We utilize various production processes to manufacture dismantling joints in different sizes. Additionally, our dedicated machining center allows us to have better cost control compared to our competitors, enabling us to offer more competitive prices.
All type certificated
We hold certifications such as GSK, WRAS, ACS, DVGW, NSF, and more, ensuring that we meet the specific requirements of customers in various markets
All type standard
Our dismantling joint can be according to EN545,AWWA C209 ,AS/NZS 2280 or other specified standards.Please note different market need different standard dismantling joint, wrong standard dismantling joint have different flange dimension which will cause no way to connect with each other.
Judberd Advantage
Although we are committed to providing high-quality dismantling joints, For small-sized dismantling joints, we use vertical molding lines for casting and have dedicated machining pattern and machining centers for dismantling joints. Therefore, compared to other suppliers, we can offer more competitive prices.
Judberd small size dismantling joint castings are produced by the DISA molding line
We machine almost 100% of the body surface, We supply many casting body without coating to famous brands
Good coating quality ,WRAS,ACS,DVGW,NSF certificate is available
Any inspection is welcome
Check if the stainless steel bolts are magnetic
Third party inspection is also welcome
coating adhesion testing is done
Pressure test for dismantling joint according to EN12266
Strictly inspect the weld quality of the steel dismantling joint
Production Process
1, Inspection for material
We have a furnace front analyzer to monitor the chemical composition, and simultaneously perform chemical composition, mechanical property, and spheroidization rate testing on a ladle of molten iron at both the furnace beginning and last. This ensures that the quality of the molten iron meets the required standards.
2,Casting
We have replaced the previous coal-fired furnace with an electric furnace for smelting molten iron, ensuring that our production meets environmental requirements
3,Casting Inspection
After casting , we need to check the casting to see if any casting defects are exist.For those with casting defects, the engineer will judge whether the casting should be discarded or can be repaired.
4,Polishing &Shot blasting
We need to grind the dismantling joint body surface to remove excess parts, so that the casting meets the dimensional requirements of the product. And the surface becomes smooth.Then the casting needs to be shot blasted before machining to remove dust and impurities from the surface, please note 2nd sand blasting is needed after machining to remove rust from the surface of the casting, dust and poor adhesion of the surface due to grinding etc， in preparation for FBE coating
5,Machining
The dismantling joint are machined according to customer requirements. Judberd produces dismantling joint with 100% machined surfaces, except for the middle gland, so that the surface of the product is very smooth.
6,Dimension Inspection
After machining,Dimension inspection is necessary to assure everything dimension is right.
7,FBE Coating
Make FBE coating, nylon coating or other customer-specific coatings for dismantling joint surface
8,FBE Coating inspection
FBE coating inspection include coating appearance inspection, color difference inspection,thickness inspection,powder adhesion,coating performance etc inspection.
9,Assembling
Assemble gasket ,bolt and nuts .We use special fixtures to ensure that the reserved length of the bolts during installation is appropriate and as consistent as possible, allowing for direct installation without the need for secondary adjustments.
10,Pressure,Visual etc inspection
Test pressure should be 1.5 times of the working pressure with a holding time of 30s.Pressure test video and report is available
11,Packing
There many different packing way, we can use poly wood box, crate, or metal case etc to pack dismantling joint.We can also use moisture-proof plastic bags with desiccants for packaging
12,Despatchment
We can despatch our dismantling joint by sea, by train or by air, if you need us despatch by train, you need to tell us before packing to pack the goods according to train despatchment rule :”Cannot lean forward or backward, cannot lean left or right”
Dismantling Joint Use
Dismantling joints can be used to connect pipes of various materials, such as DI pipe, steel pipe, HDPE pipe,GRP pipe etc, as long as the flange at the end of the pipe can be connected to the flange at the end of the dismantling joint, ensuring a good seal between the two flanges.
But Sometimes we need to connect dismantling joint with valves or other pipe instrument which have non common flanges, then special length bolts should be assembled to be enough for the flange connection between dismantling joint flanges and other parts flanges.
Dismantling Joint with Long Bolts for Special flange connection
Dismantling joint connect with GRP pipe
Restrained Dismantling Joint
Restrained dismantling joint also called rigid dismantling joint or thrust dismantling joint.
Restrained dismantling joint is rigid type dismantling joint, no deflection angle is allowed, it is one kind dismantling joint who have threaded bolts which go through the entire body, these bolts also can be connected to the flanges which will be connected with dismantling joint own flange. No additional bolts are required.
Restrained dismantling joint
Restrained dismantling joint
Restrained dismantling joint
Non-Restrained dismantling joint
Dismantling Joint Drawing
Judberd can design dismantling joint according to customer requirements, especially for steel dismantling joints.Because there have no moulds for steel dismantling joint,we can design steel dismantling joint according to client wishes, As long as customers provide specific requirements, we can offer professionally functional dismantling joints. Similarly, for large-size ductile iron dismantling joint, we can design them according to the specific needs of the project. Below are the drawings we have designed for our customers, for your reference.If you want to know how to calculate dismantling joint dimension by yourselves, please click below button to check.
Dismantling joint length
For ductile iron dismantling joint , we use molds to produce the body. The dimensions of the body are fixed, so the adjustable length for the whole dismantling joint is also fixed. Our mold design is suitable for most engineering requirements, but if customers require special lengths, we can also modify the mold to meet your requirements. If you need a longer one, we can achieve this by increasing the length of the long body and short body. If you need a shorter one, we can achieve this by reducing the length of the long body and short body. However, each size of dismantling joint has its own minimum length, which is primarily determined by the thickness of the flanges and the thickness of the nut. If the operating conditions require a shorter dismantling joint length, our engineers will provide professional recommendations
For steel dismantling joints, we do not need molds for production, so the adjustable length is relatively flexible and can be designed according to customer requirements. However, similar to iron dismantling joint , each size of dismantling joints has its own minimum length, which is also mainly determined by the thickness of the flange and the thickness of the nut.
RFQ
Why dismantling joint leaking?
As a professional dismantling joint manufacturer from china, we have 0 complain rate for more than 10 years.That is because we know very well how dismantling joint work and we have rich experience.More than 90% of the reason for dismantling joint leaking is the poor quality for gasket.So please check the gasket quality carefully when you inspect the dismantling joint quality.
DI dismantling joint vs MS dismantling joint
DI dismantling joints are produced by moulds, so once the sample is qualified, the quality of the casting is basically not a problem, but MS dismantling joints are welded with carbon steel flanges and steel plates, so the level of the welders and the welding process directly affect the quality of the dismantling joint. Therefore, the inspection of MS dismantling joints should focus on the inspection of the welding seam to prevent leakage of liquid due to welding quality.
However, carbon steel dismantling joint can withstand working pressures above PN25, whereas ductile iron dismantling joint can only withstand working pressures less than or equal to PN25.
Why are dismantling joints used?
Dismantling joint is widely used in pipe installation design. dismantling joints are used to allow for the dismantling of pipe fitting,valve,meters etc without having to completely uninstall the whole pipeline. This is beneficial as it allows for easy maintenance and repair of the pipe fitting,valve,meters or other instruments. dismantling joints are also less likely to cause damage to the surrounding area when they are removed.
When a critical part of a pipe needs to be repaired or replaced, we can simply shorten the length of the dismantling joints to allow the valve, pump, meter, etc to be removed for repair or replacement. The dismantling joint provides a clean break in the piping so that the repair or replacement can be made without affecting the rest of the pipeline. For this reason, dismantling joints are an essential part of many pipe installation designs.
While dismantling joints are most commonly used in water pipelines, they can also be used in other types of piping systems such as gas and sewer pipelines.
Where are dismantling joints used?
Because dismantling joint has a telescopic function, it is generally connected with vulnerable and important parts on pipelines such as valves, water meters, and pumps that require regular maintenance or replacement, so that they can be repaired or replaced regularly. Dismantling joint is a common and indispensable product on the pipeline.
With increasing demands for the convenience of pipeline maintenance in engineering projects, more and more dismantling joints are being used. Dismantling joints with better functionality are becoming increasingly popular.Now some supplier designed dismantling joint with butterfly valve together to simplified structure and also proved that the dismantling joint is very important for valves.
Dismantling joint with butterfly valve
This photo is not belong to judberd , just for show purpose
Dismantling joint assembled for gate valve and ball check valve
Dismantling joint assembled for butterfly valve
How dismantling joint work?
How to install dismantling joint?
1, Adjust the dismantling joint to the assembling length
2. Align the dismantling joint flange bolt holes with the flange bolt holes to be connected
3. Put in the valve,meters or other segement which dismantling joint is working for, make sure the bolt holes
of the valves ,meters or other segement are aligned with the bolt holes of the dismantling joint flange, and tighten another flange of the valve with bolts
4. Insert the dismantling joint long bolts and tighten them with the specified torque in diagonal order.
5. Tighten the bolts of the middle gland to ensure that there is no problem with the sealing of the rubber ring
How to uninstall dismantling joint?
1, Loosen the dismantling joint long bolt
2, Push the long body into the short body to shorten the dismantling joint length
3. Loosen the bolts on the flange at the other end of the valve and take out the valve
4. Repair or replace valves or other segment which dismantling joint is working for
What are the dismantling joint materials?
Dismantling joint bodies
1,Ductile iron EN GJS400-18,EN GJS450-10,EN GJS 500-7,ASTM65-45-12
2. Carbon steel Q235, Q275, etc.,or carbon steel according to customer requirements.
3. Stainless steel SS304,SS316 etc or stainless steel according to customer’s requirements.
Tie rods
Carbon steel grade 4.8, 6.8, 8.8, etc. or as per customer’s requirement, surface can be galvanized, Dacromet, Teflon, Jumet, etc.
Stainless steel SS304, SS316 or other stainless steel grades as required by the customer
Rubber ring
EPDM/NBR is more commonly used, if the customer needs other materials, we can also provide
Surface coating
FBE coating, nylon11 coating, anti-corrosion paint etc are all available.
Dismantling joint vs expansion joint
Dismantling joint is used to facilitate the maintenance or replacement of important parts in the pipeline. It is necessary to manually loosen the bolts to lengthen or shorten the face to face length of dismantling joint. Once installed in the pipeline and the bolts are tightened, the length cannot be changed.
Expansion joint is elongated or shortened under the action of the vibration of the pipeline itself, without manual operation.
Therefore, they are products with different functions and cannot work instead of each other.
Photos are from google,for instruction only
Dismantling joint vs flange coupling adapter
The dismantling joint function is to allow the removal of important valves,flow meter etc instrument from the pipeline by telescoping the length.
The function of the Flange Adaptor is to connect the socket end of the pipe to the flange in the pipe.
The two products are for completely different purposes.
Some user want to know if they can use flange adaptor to replace dismantling joint. but please note the following differences between them
1,The dismantling joint ends are flanged and are generally a rigid connection. Rigid dismantling joint can transfer the axial thrust from the pipe to the entire pipeline, thus avoiding damage to the dismantling joint from axial thrust.
2,Dismantling joint is rigid connection, no deflection is allowed
3,For dismantling joint,after repairing or replacement of valves, water meters and other important instruments, only the flanges at both ends need to be reconnected, no need to re-pressurise the pipeline to allow the fluid to run again.
1,Flange adaptor is one flange end and one socket ends. it is a flexible joint, need to bear the axial thrust in the pipeline themselves.
2,The flange adaptor is a flexible connection that allows a deflection angle of 3 degrees.
As a professional manufacturer of dismantling joint and flange adaptor, we recommend not to use flange adaptor instead of dismantling joint because they are designed for their specific function.
Judberd dismantling joint video
Dismantling Joint 3D Drawing
FBE coating adhesion test for dismantling joint , pull-off test
DN2600 PN25 dismantling joint
Thickness inspection for Dismantling joint
AWWA C209 dismantling joint
Light duty dismantling joint
Light weight dismantling joint
