Manufacturer, Supplier & Exporter of Double Flanged Dismantling Joint

Double Flanged Dismantling Joints are mechanical fittings used in piping systems to facilitate the installation, removal, and maintenance of components like valves, pumps, meters, or sections of pipeline. They feature flanges at both ends (double flanged), plus a telescoping, adjustable middle section. This allows axial adjustment (length changes) so that flanges on either side can line up properly, which helps reduce installation stress and simplifies replacement without disturbing the entire piping system.

These joints are especially useful in systems where frequent maintenance is anticipated or where access is restricted. Because you can dismantle or remove a component by loosening the joint, rather than cutting or decommissioning large sections of pipe, downtime and labour costs are markedly reduced. Moreover, because they can accommodate small misalignments and thermal expansion, they help prevent stress on connected equipment which could otherwise lead to leaks or mechanical failure.

Beyond metros, there is demand in Tier‑2 and Tier‑3 cities such as Nagpur, Indore, Bhopal, Jaipur, Kanpur, Lucknow, and more. In these cities, municipal water works, pumping stations, sewage treatment facilities etc. often require dismantling joints for ease of maintenance and flexibility of piping. Given Riddhi Siddhi Impex’s experience with supplying flanges and fittings across many regions, they are in a strong position to fulfil orders in such cities.

Further, Riddhi Siddhi Impex would need to ensure certain technical features in any Double Flanged Dismantling Joint: pressure rating (often PN10, PN16, up to PN25 or higher depending on project), dimensional compliance to flange drilling standards (ANSI, DIN, BS, IS etc.), gasket type and sealing, materials (ductile iron, carbon steel, stainless steel), coating, and the telescopic adjustment range. Suppliers globally (e.g. Disai Valve, HTFLEX, etc.) offer dismantling joints with these features.

Double Flanged Dismantling Joints are engineered to withstand the rigors of heavy-duty industrial and municipal applications. Their robust construction ensures longevity even under high-pressure and high-temperature conditions, making them ideal for water treatment plants, power generation stations, oil and gas pipelines, and chemical processing industries. The flanged ends facilitate easy bolt connections, which allow quick disassembly and reassembly during maintenance activities, thus reducing operational downtime significantly.

Double Flanged Dismantling Joint - Technical Details & Specifications

1. Specification

Property	Details
Product Name	Double Flanged Dismantling Joint
Manufacturer	Riddhi Siddhi Impex
Material	Ductile Iron, Carbon Steel, Stainless Steel (SS304, SS316)
Flange Type	Double Flanged (ANSI, DIN, IS, BS)
Size Range	DN 50 mm to DN 2000 mm
Pressure Rating	PN10, PN16, PN25 (customizable)
Coating	Fusion Bonded Epoxy (FBE), Hot Dip Galvanized, Epoxy Paint
Application	Pump connections, Valve removal, Pipeline maintenance, Water & Sewage systems

2. Chemical Composition

Material	C (%)	Si (%)	Mn (%)	P (%)	S (%)	Other Elements
Ductile Iron (GJS 400-15)	3.2–3.6	2.2–2.8	0.1–0.3	≤0.05	≤0.02	Mg 0.03–0.05%
Carbon Steel (ASTM A106 Gr B)	0.25–0.30	≤0.40	≤1.35	≤0.035	≤0.04	—
Stainless Steel (SS304)	≤0.08	≤1.00	≤2.00	≤0.045	≤0.03	Cr 18–20%, Ni 8–11%

3. Mechanical Properties

Material	Yield Strength (MPa)	Tensile Strength (MPa)	Elongation (%)	Hardness
Ductile Iron	≥300	≥420	≥10	170–230 BHN
Carbon Steel	≥250	≥410	≥20	≤180 HB
SS304	≥205	≥515	≥40	≤92 HRB

4. Dimension Chart (Sample Sizes)

DN (mm)	Length (mm)	Flange OD (mm)	No. of Bolts	Pressure (bar)
80	220	200	4	10
150	280	285	8	16
300	380	445	12	16
600	550	670	20	10
1000	720	920	28	10

5. Equivalent Grades

Material	Equivalent Grade	Standard
Ductile Iron	GJS 400-15	EN 1563
Carbon Steel	A106 Grade B	ASTM A106
SS304	1.4301	EN 10088

6. Equivalent Standards

Standard	Description
IS 9523	Indian Standard for Ductile Iron Fittings
EN 545 / EN 598	European Standards for Ductile Iron Pipe Fittings
BS 4504 / BS 4772	British Flange and Joint Standards
ANSI B16.5	American Standard for Pipe Flanges

7. Other Types of Dismantling Joints

Type	Material	Application	Pressure Rating
Single Flanged Dismantling Joint	Ductile Iron, Carbon Steel	Limited axial adjustment	Up to 16 bar
Restrained Dismantling Joint	Ductile Iron, Stainless Steel	High pressure and load applications	Up to 25 bar
Expansion Dismantling Joint	Rubber, Stainless Steel	Thermal expansion compensation	Up to 10 bar
Threaded End Dismantling Joint	Carbon Steel	Small diameter piping systems	Up to 10 bar

Riddhi Siddhi Impex’s manufacturing processes for Double Flanged Dismantling Joints incorporate advanced casting and forging techniques. Using high-grade raw materials sourced from trusted vendors, the company ensures that each joint meets stringent quality standards. The dimensional accuracy, pressure integrity, and surface finishing of their products adhere strictly to international benchmarks, offering clients reliable performance and safety assurance across various sectors.

Frequently Asked Questions (FAQs)

Q1: What is the main function of a Double Flanged Dismantling Joint?

It allows for easy axial adjustment and facilitates the removal or replacement of valves, meters, or fittings in a pipeline system—without disturbing the entire line.

Q2: What materials are commonly used for these joints?

Common materials include ductile iron, carbon steel, and stainless steel. The choice depends on the application's pressure, temperature, and corrosion requirements.

Q3: Are these joints suitable for high-pressure applications?

Yes, Double Flanged Dismantling Joints are designed to handle high-pressure systems, with standard versions rated up to 25 bar or higher upon request.

Q4: Can Riddhi Siddhi Impex customize sizes and pressure ratings?

Yes, Riddhi Siddhi Impex offers fully customized dismantling joints, tailored to meet specific size, pressure, and material requirements for projects across India.