LSI – Mech Engineers Private Limited, with over 35 years of experience, boasts a robust infrastructure and specializes in providing a comprehensive range of metal bellows-type expansion joints.We have been successful in developing bellows-type expansion joints for various applications, including steam turbines, high-pressure heat exchangers, Pacol reactor piping, and high-temperature services in most core sector industries.At our facility, we have the capability to manufacture bellows ranging from as small as DN 25 up to a diameter of 9000 mm. These bellows are designed to operate under varying conditions, accommodating pressures as high as 200 kg/cm2 (g), ranging from full vacuum to temperatures spanning from cryogenic levels up to 1200°C.We offer Bellows expansion joints out of wide range of materials–bellows made out of Austenitic stainless steels, High nickel alloys along with required hardware out of various combinations of Carbon steel, Cr-Mo steels, Stainless steels and High nickel alloys.
Category Type Description
Categorized by Pressure Capability Reinforced Expansion Joints Designed to handle higher pressure with reinforcements.
| Category | Type | Description |
| Categorized by Pressure Capability | Reinforced Expansion Joints Unreinforced Expansion Joints | Designed to handle higher pressure with reinforcements. Suitable for low-pressure applications. |
| Categorized by Movement Type | Axial Movement Lateral Movement Angular Movement | Accommodates expansion or contraction along the pipe axis Compensates for sideways displacement. Allows angular deflection in one or more planes. |
| Categorised by Temperature Resistance | Refractory-Lined Expansion Joints | Insulated with refractory materials for high temperatures. |
| Categorised by Corrosion Resistance | Lined Expansion Joints | Use linings and coatings such as C276, rubber, and PTFE for corrosion resistance. |
| Categorised by Geometric Shape | Circular Expansion Joints Rectangular Expansion Joints | Standard design for piping systems. Used in ducting and industrial flue gas applications. |
| Categorised by Profile | U-Profile, Omega Profile, S-Profile | Selected based on space, flexibility, and movement range. |
Expansion joints are critical components in piping and ducting systems, designed to absorb movement, accommodate pressure variations, and withstand harsh environmental conditions. They can be classified into various categories based on operational and design parameters
LSI-MECH Expertise
LSI-MECH brings extensive expertise in the design and selection of expansion joints tailored to your unique operational requirements. From material selection to configuration design, we provide end-to-end support to ensure performance, reliability, and longevity in service
In addition to standard configurations, expansion joints can include several enhancements
• Redundant Plies: Additional layers for safety and durability.
• Inline Pressure Balancing: To reduce pressure thrust forces on system anchors.
• Tie Rods, Limit Rods, and Hinges: For controlled movement and protection against over extension or over compression.
Material Selection and Service Life
The service life of an expansion joint is heavily dependent on accurate material selection and design customization. Factors such as temperature, pressure, movement type, corrosion resistance, and environmental exposure must be carefully considered during the engineering process.
