DN50-DN4000 Universal Tied Expansion Joint Compensator SS304/316L Bellows Pn16/Pn25

• After-sales Service: According to The Contract
• Warranty: 12 Months
• Transport Package: Seaworthy Plywood Case (with Steel Frame Support)
• Model NO.: Universal-Tied Type
• Specification: DN50-DN4000
• Trademark: Baori Steel
• Origin: China
• HS Code: 8307100000
• Production Capacity: 50, 000 Pieces/Year

Product Description

Product Description

Overview of Universal Tied Metal Expansion Joint

Engineered for complex piping systems, our Universal Tied Metal Expansion Joint is the ultimate solution for absorbing large lateral movements and correcting misalignment. Unlike standard single expansion joints, this "Universal" design features two bellows connected by a center pipe spool, allowing for significantly greater flexibility in all directions.
Equipped with high-strength Tie Rods, this unit is self-restrained. It absorbs the internal pressure thrust, preventing it from being transmitted to your anchors or sensitive equipment, such as pumps and turbines. This makes it an essential safety component for long-distance pipelines and high-pressure systems.

Product Details

Product Name	Universal Tied Expansion Joint
Product Model	Universal Tied Metal Expansion Joint (Double Bellows)
Design Standard	EJMA (Expansion Joint Manufacturers Association), ASME B31.3
Size Range	DN50 - DN4000
Pressure Rating	PN6, PN10, PN16, PN25, up to PN64
Bellows Material	Stainless Steel 304, 304L, 316, 316L, 321 (Multi-ply Design)
Flange Material	Carbon Steel (Q235, A105) / Stainless Steel (SS304, SS316)
Intermediate Pipe	Carbon Steel or Stainless Steel (Same as connection material)
Tie Rods Material	High-strength Carbon Steel / Stainless Steel
Temperature Range	-196°C to +600°C (Cryogenic to High Temp)
Movement Absorption	Large Lateral Movement (Main), Axial, Angular
Connection Type	Flanged End (ANSI, DIN, JIS) or Butt-weld End
Application	District Heating, Exhaust Systems, Petrochemical, Power Plants
Customization	Available
HS Code	8307100000

Specification

Specification & Pricing Note

1. Price Basis:
The reference prices listed are based on the standard material combination:
Bellows: Double Stainless Steel 304 (Multi-ply).
Flanges & Pipe: Carbon Steel (Painted / Galvanized).
Accessories: Includes Tie Rods (Limit Rods).
2. Customization Options:
Prices will vary for: 
Full Stainless Steel Construction (Flanges & Tie Rods in SS304/316).
High Pressure: PN25, PN40, or PN64 ratings.
Special Length: Customized overall length (L) according to your drawing.
Price Negotiable! Please contact us with your specific requirements.

Size	Price
DN100	$145
DN200	$320
DN500	$1200
Customization	Negotiable

Application

District Heating & Steam Pipeline Networks

Power Generation & Engine Exhaust Systems

Petrochemical & Oil Refineries

Specifically designed for long-distance steam or hot water pipelines, especially in "L" shaped or "Z" shaped piping layouts. The double bellows structure allows it to absorb large lateral (sideways) movements caused by thermal expansion, which single joints cannot handle.Reduces the need for multiple expansion joints and expensive pipe guides, simplifying the piping design.

Widely used in the exhaust manifolds of diesel generators, gas turbines, and marine engines.

Role: Absorbs both thermal expansion from high-temperature exhaust gas (up to 600°C) and strong mechanical vibration from the engine.
Benefit: The Tie Rods prevent the bellows from over-extending, protecting the turbocharger and engine connection points from damage.

Essential for complex piping systems in refineries and chemical plants where safety is paramount. It used in high-pressure fluid transfer lines. The Tie Rods absorb the internal pressure thrust, meaning the main anchors do not need to be as heavy or expensive. It provides a safe, leak-proof solution for handling hazardous media like oil, gas, and chemicals, preventing anchor failure.

Production Showcase

Our Company

Company Profile

Shanghai Baori Steel Industries Co., Ltd, has established its significant 
presence in the metal manufacturing and fabrication industries. Since its 
establishment on Aug 03, 2023, the company has 
been committed to providing comprehensive and efficient 
fabrication solutions, focusing on the integration 
and optimization of steel supply services.

Company Address

Our company is located in Baoshan District, Shanghai, China.
Specific Location:

Room 403, Building 1, Lane 1588, Youyi Road, Baoshan District, Shanghai, China 

FAQ

Q: When should I choose a "Universal" expansion joint instead of a "Single" one?
A: You need a Universal (Double Bellows) joint when your piping system requires absorption of large lateral movements (misalignment) that a single joint cannot handle. It acts like two joints connected by a pipe, offering much greater flexibility.

Q: What is the function of the Tie Rods? Should I remove them after installation?
A: Do NOT remove the tie rods. For a Tied Expansion Joint, the rods are designed to restrain the pressure thrust generated by internal pressure, preventing the bellows from over-extending. They are essential for the safety of the unit.

Q: Can you customize the length of the intermediate pipe?
A: Yes. The length of the center pipe spool is critical because it determines how much lateral movement the joint can absorb. We can manufacture it exactly according to your design requirements or drawings.

Q: Is the unit delivered fully assembled?
A: Yes, the entire Universal Expansion Joint (including bellows, flanges, center pipe, and tie rods) is pre-assembled and tested in our factory. It is ready for installation immediately upon arrival at your site.

Q: How do you ensure the welding quality of such a complex product?
A: All our welders are certified. We perform 100% Hydrostatic Testing and Dye Penetrant Testing (PT) on every weld seam to ensure zero leakage. X-Ray inspection is also available upon request.