Revamps 2025 Issue

YES

NO COMMENTS

Prepare mechanical design datasheet & attachment Drg.

PDS/HDS received for comments to tray designer

Providing comments by tray designer (if any)

START

Provide inputs regrading cartridge tray to column MR

Fabrication of column by column vendor at shop in co-ordination with tray vendor

Transport of column with shop installe d tray bundle to site

Initiate bundle installation

YES

Release of column MR along with cartridge tray

Column with tolerance range

Column erection at site along with cartridge tray installed inside

Corrective measures at column vendor shop with easily available facilities

Shop installation of tray bundle inside column under tray vendor supervision

Selection of tray vendor by column supplier

Fabrication of tray bundle by tray vendor at shop in co-ordination with column vendor

END

Transportation of tray bundle at column vendor shop

Figure 4 Process flow methodology

facilitates seamless coordination between the vendors. In this approach, trays are fabricated after the rolling of the column shell, ensuring the column’s internal diameter and tolerances are accurately available. The tray vendor will then transfer the fabricated trays to the column vendor’s shop, where any required modifications can be addressed promptly using the shop’s facilities and exper- tise. The final installation of cartridge trays will be completed at the column vendor’s shop under the joint supervision of both the column and tray vendors. The revised process flow illustrating this methodology is provided in Figure 4 . The column with pre-installed cartridge trays will be trans- ported to the construction site as a single integrated unit, thereby eliminating the need for separate on-site tray instal- lations and significantly reducing the overall project schedule. Shifting the tray installations from the construction site to the vendor’s shop also enhances HSE performance in construc- tion activities. Traditionally, cartridge tray bundles are solely supported on cleats welded to the column shell, which poses a risk of dislodgement during transport. To address this and enable the proposed solution, Engineers India Limited (EIL) has developed a specialised sealing arrangement with an interlocking system, ensuring both smooth installation and safe transportation of the pre-installed cartridge trays from the vendor’s shop to the site. The installation of cartridge trays on-site presents considerable challenges and hazards due to associated HSE risks. To ensure smooth execution, each stage, requires meticulous planning and attention

Advantages of EIL-designed sealing and interlocking arrangement include: • Improved sealing between the tray and the column shell. • Increased active area of the tray. • Minimising the risk of damage to installed trays during transportation. • Suitable for a definite range of gaskets without any mod - ifications in trays. • Significantly reducing on-site efforts and challenges. • Safeguards column integrity by utilising pre-installed bundles as support braces and preventing deformation during transit. Conclusion The installation of cartridge trays on-site presents con- siderable challenges and hazards due to associated HSE risks. To ensure smooth execution, each stage, from design and engineering to fabrication, inspection, and installation, requires meticulous planning and attention. This discussion presents a study on the root causes leading to failed car- tridge tray installations at sites and outlines an alternative method aimed at mitigating risks, optimising installation timelines, and enhancing HSE performance. The proposed execution strategy, ‘Single point respon- sibility vendor for column and tray under RFQ and instal- lation at shop’, is designed to facilitate seamless project execution. The use of pre-installed cartridge tray bundles equipped with EIL’s specialised sealing and interlocking arrangement offers a novel and cost-effective solution to improve HSE and quality standards in cartridge tray installations. Acknowledgement The author would like to wholeheartedly thank the management of Engineers India Limited and ‘EIL-QC-105 team members (Harshita, Satish, Bhagyaraj and Samad)’ for the support and encouragement in developing this work. He is also thankful and fortunate enough to get constant encouragement, support, and guidance from his mentors

Revamps 2025