We have supplied expansion joints for 150+ Air cooled condensers, 600+ Surface condensers, 200+ high pressure Heat exchangers, 150+ Steam turbines.


30 +
Year of Experience
2,50,000 +
Designs Completed
45 +
Country Experience
6,00,000 +
Supply Completed
2000 +
Satisfied Customers

LSI-Mech Engineers Pvt. Ltd. is a professionally managed organization based out of Chennai, India.

We specialize in bellows type metal expansion joints.

With a humble beginning two decades ago, LSI-Mech Engineers Pvt. Ltd. has crossed several milestones. Today we are the most preferred partner for all our customers and enjoy the status of 'Most Dependable Supplier' for all Metal Expansion Joints.

Our Value

Why we are different.

Our facility in and around Chennai, India has floor space in excess of 1,20,000 sq ft is equipped with all latest machinery, equipment and instruments to manufacture, test, and supply expansion joints for any critical application.


Our vision is to remain a financially strong, ethical business house with strong foundation, capabilities and practices, to be a winner in the market place under all circumstances.


Super achievement in all our processes and continuously maintaining excellence in our product and customer services and continuously building the value addition and growth of our company.

business team showing unity business success team concept

Our Quality Management System complies with the requirements of the ISO 9001:2015. We are authorized to apply ‘NB’ mark and register boilers, pressure vessels or other pressure-retaining items with the National Board in accordance with its provisions and items manufactured. We conform to the standards of ISO 3834-2 :2005 quality requirements for fusion welding of metallic materials. Our quality program has been certified by ASME and bears the ASME Single Certification Mark with the Designator for Pressure Vessels as per Section VIII Division 1 and ASME Single Certification Mark with the Designator for Pressure Vessels as per Section VIII Division 2.

Every Metal Expansion Joint manufactured at our facility is tested, inspected and certified for trouble-free and best performance by our qualified and trained quality team. We have Level III and Level II qualified and experienced engineers who perform the required inspection and tests such as the PT, RT, UT, MPI etc. In addition to the routine tests including PMI, Hydrostatic, Pneumatic and Vacuum, we are also equipped to carry out the Helium leak test. We also perform destructive prototype tests such as Cycle Life test, Squirm test, Yield Rupture test as per customer requirements.

LSI-Mech Engineers Pvt. Ltd. will ensure

A Very strong-system base and Ever enhancing customer satisfaction,

through continually improved process and Quality supported approach as a dependable and defect free product supplier at all times.

business team showing unity business success team concept

Let's start your project

We planted our roots with a commitment to earning your trust and protecting lives, property, and prestige.