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PSA Quay Cranes

PSA Quay Cranes

Rehabilitation of Quay cranes at Pasir Panjang Terminal, Singapore

The PSA Cranes were being shifted from from one paint to another and had to be lashed to a barge within the terminal.

When they were finally put into position; the welded area on the crane had to be rectified. This was executed with the use of of the SATBlast machine for proper surface preparation before Zinga could be applied..

LTA Directional Signs

Rehabilitation using SATBlast Vapour Blasting System

When the LTA directional signs were initially erected, a 3-coat system was applied and unfortunately it had failed due to creeping and crevice corrosion. The SATBlast Vapour Blasting Machine was deployed to remove the old coatings from the structure; where after proper surface preparation (SA 2.5) was achieved efficiently and effectively. Zinga was then applied on it with a 15 year warranty against corrosion.

SATBlast & Abrablast Validation for TSA Application

Abrablast (Recycled Glass) Abrasive is a versatile blasting media. In Medium grade it is an all round abrasive suitable for use on a wide variety of substrates. In Fine grade it is ideal for use in our SATBlast vapour blasting system.

FRP Products Co. Pte. Ltd. is the in-house contractor for refinery in Singapore. Their client specified the use of TSA for the rehabilitation of pipes in their refinery. FRP was keen to explore the possibility of using the SATBlast Vapour Blasting machine with Abrablast Recycled Glass abrasive to benefit from the cost efficiency and improved productivity.

The first step in the process required the use of a bare plate and salt-test prior to blasting by the SATBlast machine. Thereafter, the bare plate was blasted to an SA 2.5 standard by the SATBlast Vapour Blasting machine with the use of a special recycled glass abrasive by the name of ‘Abrablast’.

The SATBlast machine along with the Abrablast abrasive allowed for ease of blasting and provided an adequate surface for various coatings. Another salt-test was performed post-blasting and it was found that the salt content had reduced! Furthermore, a profile test was run and it was revealed that the surface achieved between Rz 92 – 102 microns (higher than the minimum requirement of Rz 70 microns).

Next, the plate was coated with a TSA (Thermal Spray Aluminium) with an average of 300 microns DFT. Thereafter, a Pull-off Test was administered via various Dolly’s onto the coated plate to test the adhesion of the coating to the substrate. The results depicted a range between 8.75 MPA – 11.57 MPA when the minimum requirement is 7.00 MPA.

SMRT CD Doors – Tiong Bahru MRT Station

The SMRT Civil Defence (CD) Doors was installed 30 years ago and were corroded and required rehabilitation. The SATBLast Vapour Blasting machine was deployed to site at the train station to remove all coatings to bare metal. Hot works including cutting and welding were required during the rehabilitation process to restore the doors to their original condition so as to perform the functionalities they were designed for.

Zinga was applied to protect the door from corrosion after proper surface preparation (SA 2.5). A third party surveyor was engaged to conduct NDT tests to validate the structural integrity of the rehabilitated doors. A warranty of 10 years on both workmanship and corrosion protection was extended to SMRT. Due to the complexities of the job, the project was completed within a 4-month timeframe.

CD Door Initial state with Zinganisation Process

As of February 2018

After Zinganization

CD Door Inspection One Year Later

Project Schlumberger

The mist coat followed by the full coat technique was used during the Top-coating process.
Abrablast (Recycled Glass) Abrasive is a versatile blasting media. In Medium grade it is an all round abrasive suitable for use on a wide variety of substrates. In Fine grade it is ideal for use in our SATBlast vapour blasting system.

The skids were specially designed per end user’s stringent requirement and in accordance to DNV 2.7-1 specification. They were fabricated by our Singapore team and certified by DNV. Care was taken for compliance to all safety measures. The skids were then blasted to SA 2.5 prior to the application of a 100µm of Zinga. The Zinganized chequered plates were then welded onto the skid; the welding joints were then grinded and coated to Zinga to ensure corrosion protection. The structure was further top-coated with 80µm of Schlumberger Blue PU Topcoat.

The pumps and valves and other fixtures were put together in an assembly line onto the skid so as to complete the project. Further tests were done on the project to comply to quality and safety standards before being shipped to the client in Russia.

Fagioli SPMT

Project Fagioli was implemented simply due to the fact that the SPMT vehicle needed rehabilitation. The Top and Sides of the Vehicles were corroded and needed to be blasted and coated with Zinga and thereafter PU top-coated.

The entire Zingametall (Singapore) team was responsible for the rehabilitation process and had been guided by our Head Engineer, Mr. Shanmuga Sundaram. The whole process kicked off by placing the SPMT on site, and blasting the Top and Sides of the Vehicles at a proper SA 2.5 standard with a surface profile of at least Rz 70 microns. This was done with the use of the SATBlast Dustless Vapour Blasting machine and the Abrablast (Recycled Glass) Abrasive. Next, the surface was then applied with Zinga with a minimum of 100 microns DFT by an airless spray.

The SPMT Vehicles were then PU Top-coated all over with a minimum thickness of 80 microns DFT. The mist coat followed by the full coat technique was used during the Top-coating process. A final DFT check was then implemented where a minimum coating thickness of 180 microns DFT was specified.

The final rehabilitation of Fagioli SPMT Vehicles were fully coated and were ready to use as it was blasted and coated on-site. A warranty of 10 Years was issued to Fagioli for their SPMT Vehicles.

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