Enviromech™ Composite Thief Hatch FAQ
The Enviromech TM Composite Thief Hatch is a revolutionary product designed to enhance safety and efficiency in the oil and gas industry. With a focus on durability, corrosion resistance, and environmental compliance, this innovative hatch addresses the critical needs of operators by ensuring secure access to storage tanks while minimizing emissions. This FAQ page is dedicated to answering the most common questions about the Enviromech TM Composite Thief Hatch, offering insights into its features, benefits, and installation process, so you can make an informed decision about incorporating this essential component into your operations.

Why is the Enviromech™ Composite Thief Hatch more expensive than other options?
Answer: Consider the time and resources spent maintaining your current fleet. How often do you need to purchase materials for overhaul and repair? Each hour an operator spends checking hatches has associated costs. The Enviromech Composite Thief Hatch can reduce these costs by over 90%, making it a cost-effective solution in the long run.
Will the composite material hold up over time?
Answer: Our composite material is designed for aerospace applications, which endure far greater stresses than those found in storage tanks. It offers superior corrosion resistance compared to any metal currently in use, ensuring longevity and durability.
Are plastics used in the Enviromech™ flammable?
Answer: The Enviromech Composite Thief Hatch is made from Ultem® 2300, which meets the UL94 V-0 standard. This means it is highly flame-retardant, self-extinguishing after exposure to fire. While all materials can combust under extreme conditions, Ultem® 2300 offers the highest standard of fire resistance available.
Can you provide Enviromech™ with different pressure and vacuum settings?
Answer: Absolutely. We can supply hatches with any pressure and vacuum setting you require within 2-4 weeks.
Is Encino Environmental Services a manufacturer?
Answer: Enviromech is supported by a group of U.S. AS9100/ISO9001 certified manufacturers. We maintain our manufacturing certifications and serialize all components for traceability and conformance, exceeding the capabilities of many other OEMs.
What conditions where these tested to?
Answer: We conducted field testing over 24 months in the Bakken, Permian and Eagleford with favorable results. Additionally,we conducted third-party accelerated testing proving our hatch’s performance far exceeds expectations, providing confidence in its long-term reliability.
I am not familiar with the term “Thief Hatch”, what are other names for it?
Answer: A Thief Hatch can be referred to by several other terms, including:
- Vent Valves
- Tank Vents & Hatches
- Air & Vacuum Relief Tank Vent Valve
- Pressure / Vacuum Relief Vents
- Tank Vents & Extractor Equipment
- Tank Vents & Hatches
These terms are used interchangeably across different industries and platforms. Regardless of the name, the Enviromech Composite Thief Hatch provides superior performance and reliability for your liquid storage tank needs.
What sets the Enviromech Composite Thief Hatch apart from other thief hatches?
High-Impact, Low-Cost Emissions Reduction: Ensures a complete seal over the long term, reducing emissions and improving well site safety.
Durable Composite Construction: Resistant to corrosion, warping, and morphing due to extreme temperature changes and long-term exposure to hydrocarbons and acrid water vapor.
Extended Maintenance Intervals: Provides greater mechanical integrity performance over time, reducing the need for frequent maintenance.
Manufactured to High Standards: Built in an AS9100/ISO9001 facility, compliant with DFARS, and suitable for Sour Service conditions.
Versatile Application: Suitable for oil, condensate, and produced water storage tanks, and can be used for new installations or retrofitting existing tanks.
Have More Questions? Let Us Know!
If you have any further questions or need more information about our Composite Thief Hatch that wasn’t addressed above, we encourage you to connect with our team of experts. They are here to provide you with personalized support and insights tailored to your specific needs. Alternatively, you can visit our detailed product page, where you’ll find comprehensive information, including technical specifications, product features, and other essential details. Your satisfaction is our priority, so don’t hesitate to reach out for any assistance you may need.


