API 650 Welded Tanks

Welding and Construction is the second major service we provide. Our steel construction team has a huge experience in maintenance, demolishing and construction of carbon steel storage tanks and hereto-related equipment in accordance with API specifications.

Construction of 10760

As an integral part of the tank building process, we also provide services for grit blasting, painting, hydro testing till connection to other facilities such as pumps, manifolds, pipelines or any such other pre-assembled or pre-installed units.

Currently, we have all necessary equipment, tools and others instruments, including certified and experience welders, pipefitters, painters and grit blasters. Our welding jobs are checked and assessed against international standards by an international certified Welding Inspector to guarantee the best quality to our customers. To further expand our services to meet our Customers increasing demands, we have bought own welding “Robot”. This machine should enable us to further improve the quality, effectivity and efficiency of this service to our customers.

For every project we provide a detailed agreed upon project execution plan including a time schedule for our Customers to monitor timely completion of the various activities till hand-over of the project. We deliver our projects with a hand-over document, including all project planning and project execution details and Quality Control/Quality Assurances.

Standards and Qualification

All welders working on the project are certified and experienced.
A Certified Welding Inspector (CWI) ensures the quality of the welds.
Welding Procedures are provided by the contractor. These are in accordance with the standards required by the contractor (e.g. Section 9 of API 650, 11th edition). All welds are in compliance with referenced procedures.
Welding electrodes will be supplied according to the welding procedure. These are stored in rod heaters to ensure good quality of the electrodes.
All steel materials must be free from loose mill scale, surface defects, rust, slag inclusions, laminations and pitting before use.
To ensure proper alignment during construction, the steel plates or pipes are fit-up and aligned before welding. Tack welds are used for secure alignment.
Before, during and after the welds are made, frequent visual inspections are
performed to ensure everything is according to procedure.
NDT inspections are performed according to the procedures and standards requested by the Customers.

5 ea. Constructed Steel tanks

Project references

In September 2015 we finished a tank construction project at the TA-58 plant of Staatsolie Maatschappij Suriname N.V. at Saramacca. Our scope was to fabricate 3 of the 5 ea. 500 bbl. collection / storage carbon steel tanks; 3 tanks were completed by another contractor. STP provided the manpower, equipment and materials for the 3 ea. 500 bbl. Carbon steel tanks.

In February 2016, we demolished and constructed a 3020 bbl. carbon steel storage tank at the Josi plant of Staatsolie Maatschappij Suriname N.V. at Saramacca. The existing 3020 bbl. carbon steel storage tank was heavily corroded and needed to be replaced on the same tank foundation, meaning the corroded tank needed to be demolished first.

This tank was demolished by means of the gouging method, where after the construction of the new tank was started.

Demolishing of tank (gouging)

Tank demolishing (Telehandler and Manlift)

Demolishing of tank (gouging)

In December 2017 we demolished and constructed 5000 bbl. Collection Tank #1. The existing 5000 bbl. carbon steel storage tank was replaced with a new 5000 bbl. carbon steel storage tank on the same location. The tank was demolished by means of the gouging, where after the new tank was built by our certified welders under supervision of our experienced project manager and Certified Welding Inspector.