Encino’s proprietary Enviromech TM composite thief hatch is a breakthrough product, manufactured in an AS 9100/ISO:9001 facility in the USA, reduces flash loss and tackles emissions caused by corrosion by eliminating the interaction of dissimilar metals in a corrosive environment resulting in a long-lasting seal.
Enviromech™ Composite Thief Hatch
Significantly Reduces the Key Source of Liquid Storage Tank Emissions
A Modest Concept with Monumental Impact
Standard thief hatch integrity degrades over time and with exposure to the corrosive environments of liquids storage tanks (hydrocarbons and produced water) and seasonal changes in temperature and precipitation. As a result, legacy thief hatches have been recognized as one of the most significant sources of fugitive emissions of methane and Volatile Organic Compounds (VOC).
Enviromech composite thief hatches for liquid storage tanks are engineered with aerospace-grade tolerances and constructed from a durable composite glass-reinforced polyetherimide material, providing corrosion resistance and long-term mechanical integrity performance. These hatches offer a significant improvement in environmental performance and safety over existing technologies.
Features & Benefits:
Made from durable composites resistant to corrosion, warping and morphing.
Greater integrity over the long-term, mitigating emissions from liquid storage tanks
Improved well site safety profile
Low-cost, high-impact solution for both new tanks and retrofits
Manufactured in an AS 9100/ISO:9001 facility in the USA
Enviromech TM composite Thief Hatch: High-Impact, Low-Cost Emissions Reduction Solution
Enviromech is a highly durable, low-cost for high-impact solution to meet near-term and strategic environmental performance objectives.
Enviromech composite hatches are substantially less prone to warping or morphing due to extreme temperature changes and are significantly more resistant to oxidative and corrosive degradation resulting from long-term exposure to hydrocarbons and acrid water vapor.
This has been validated through accelerated pressure and corrosion testing that resulted in far superior performance against current products on the market.
Cut emissions. Save product. Reduce costs & risk.
Losses from oil and condensate storage tanks don’t always come from spills or leaks you can see. Often, the biggest contributor is venting, the controlled but costly release of vapors through a tank’s thief hatch. These vapors carry product with them, leading to measurable inventory shrinkage and increased emissions.
Flash loss occurs when high-pressure liquid enters the storage tank and rapidly releases dissolved gases. While flash loss is part of normal operations, the amount of product lost can vary dramatically based on equipment performance and is an often-overlooked drain on profitability and compliance. By understanding how it occurs operators can make informed decisions to reduce venting loss and keep more product in the tank. One of the simplest and most cost effective changes is upgrading to a hatch engineered specifically to minimize venting.
The Enviromech Composit Thief Hatch solves this with a composite seal system that maintains a consistently tight seal under fluctuating pressures and temperatures, helping retain more product, lower VOC emissions, reduce costs and reduce risk.
| Available Construction: | Made from durable composites and engineered to aerospace-grade tolerances. |
| Bolt Pattern: | 8 in. API |
| Pressure Setting Range: | 4, 6, 8, 12, 16, 24, and 32 oz./sq. in. |
| Vacuum Setting Range: | 0.40, 0.90, and 3.50 oz./sq. in. |
| Construction Material: | - Ultem® 2300 (non-sparking) |
| - Pressure Gasket: Viton | |
| - Vacuum Gasket: Viton | |
| Optional Equipment: | Sensor Adaptor |
Prebuilt to API 12F standards
Manufactured in an AS 9100/ISO:9001 facility in the USA
All Environmech composite thief hatches are leak tested and hand assembled for quality assurance
All materials are purchased in accordance with DFARS (Defense Federal Acquisition Regulation Supplement) compliance
Encino housings are built to accommodate standard OEM replacements
Extended maintenance intervals exceeding those of traditional products
Suitable for Sour Service conditions
Oil and condensate storage tanks
Produced water storage tanks
Suitable for both new tank installation and retrofitting existing ones
Stop venting profits & increasing risk.
Let us show you how the Enviromech composite thief hatch can help you keep more product where it belongs.
Add the SNITCH™ Tank Vapor Intelligence System to Your Thief Hatch for Continuous Emissions Monitoring
The SNITCH™ provides real-time monitoring of methane and associated hydrocarbons at the thief hatch to measure and characterize emissions events – correlating them with process conditions. By identifying deviations from vapor-liquid equilibrium (VLE), the system enables operators to maintain optimal separator set-points, reduce unnecessary venting, and recover saleable hydrocarbons that would otherwise be lost (e.g., natural gas liquids; NGLs).
