Worldwide Leader in Decontamination

Faster, Safer, Vessel Entry.

Refinery Service Overview

ZymeFlow® Decon Technology specializes in the decontamination of refinery process vessels from single units to full turnarounds. ZymeFlow Decon has planned and applied chemistry to almost every process unit in a refinery including: desalter, atmospheric distillation, vacuum distillation, hydrotreater, catalytic reformer, distillate hydrotreater, fluid catalytic cracker (FCC), hydrocracker, visbreaker, merox, coker (delayed coker, fluid coker, flexicoker), alkylation, dimerization, isomerization, reformer, horizontal vessels, amine, and sour water stripper.


The Exclusive ZymeFlow Vapour-Phase® Process


The ZymeFlow Process is the most utilized for refinery decontamination and includes a proprietary blended chemistry, Zyme-Flow® UN657, applied in our Vapour-Phase application method. The Process works by effectively penetrating all sludge, scale, and metals to target harmful contaminants. Saving time and expense, it simultaneously frees contaminants to the relief system while oxidizing remaining hydrogen sulfide and pyrophoric iron sulfide. The ZymeFlow Process results in the fastest possible vessel entry. Refinery process equipment will be de-oiled and will result in zero hydrogen sulfide (H2S), zero benzene, zero explosive gases (LEL), and neutralized pyrophorics after 8-12 hours.


The Vapour-Phase application injects proprietary chemistry directly into the steam line which travels throughout the designated equipment system. The unique, water based chemistry is not pushed or propelled through the system by steam but becomes part of the steam. This important detail allows ZymeFlow to have very few injection points and does not require elaborate hoses, piping, or complicated setup.


Turnaround Planning


ZymeFlow Decon Technology attributes much of our success and zero recordable injuries to excellent turnaround planning management. Experienced decontamination planners work with refinery personnel to ensure tasks are managed and consistent with customer design limits and specifications while staying on schedule.


To aid in the safe and fast execution of the shutdown, customized decontamination procedures, drawings, and timelines are provided to ensure the decontamination portion of the shutdown is carried out as smoothly and efficiently as possible. Our on-staff CAD technicians work closely with ZymeFlow decontamination planners to provide user-friendly conveyances of each plant's P&IDs. The easy to read CAD illustrations are powerful tools that integrate into ZymeFlow procedures to ensure refinery operations personnel can easily track and understand the decontamination status.


A procedural manual is created for each planning job. Depending on the scope of the project, the manual may contain guidlines, product information, and a step-by-step guide along with a process hazard analysis to help eliminate potential releases or incidents.


Monitoring and Testing


To ensure the success of the project, ZymeFlow technicians are onsite monitoring the progress of the decontamination. Not only are contaminants recorded throughout the scope of the work, but ZymeFlow specialist are also able to track the concentration of chemistry to help determine the level of contaminants inside the system. Based on analyzing tests throughout the project, on-site changes such as shortened treatment time, chemistry concentration, steam pressure, and other adjustments can be implemented for maximum results. The team provides operations with a post job report including the test results throughout the scope of the project.


Effluent and Disposal


ZymeFlow Decon chemistries have minimal impact on wastewater and the environment. The chemistry itself is biodegradable, wastewater friendly, and is non-exothermic. Zyme-Flow chemistry expends itself when reacting with contaminants minimizing the amount of chemistry sent to waste water. Furthermore, Zyme-Flow has a self-breaking emulsion so when agitation is stopped, the oil and chemistry separate from the water without the need for additional emulsion breakers. There is no circulation required on most units when using the ZymeFlow Vapour-Phase Process therefore the only effluent is steam condensate. If required, ZymeFlow Decon uses strategic partners to provide additional services in association with turnaround decontamination such as piping, header systems, and effluent planning.


Additional Applications


There are particularly challenging units or situations in a refinery that require special applications such as circulation or Boil-Out methods. ZymeFlow Decon would determine the best application with the customer in the planning stage. Additional chemistries are included in the ZymeFlow Decon family to address such units or circumstances. Frequent units that require options outside of Vapour-Phase include: desalters, heat exchangers, packed coke conditioning, tower bottoms, and temperature limited equipment.

Case Studies


Request Animation

Tel: +1.281.443.0300



Contact ZymeFlow Decon Technology regarding any questions, concerns, or information requests.

Animation video request picture

A United Laboratories International Brand

© 2016 United Laboratories International, LLC.

All Rights Reserved.

A TriStar Global Energy Solutions Company

A TriStar Global Energy Solutions Company