Pressure relief devices/valves.

About ChemTools

ChemTools develops practical engineering software for process engineers.

Our tools are designed to solve real engineering problems with a focus on speed, reliability and technical accuracy.

Unlike general-purpose process simulators, ChemTools focuses on specific engineering calculations that engineers perform every day.

Pressure relief calculations are often performed using spreadsheets, manual standards and expensive simulation software.

ChemTools was created to provide engineers with fast, reliable calculations that can be performed anywhere—even without an internet connection.

The goal isn’t to replace engineering judgement, but to make routine calculations significantly faster.

We offer a monthly or a discounted annual subscription. The first week is free! See pricing below.

Performing calculations and saving results do not require an internet connection, however, the sharing of results does.

ChemTools is expanding to include additional process engineering tools based on user needs. These are listed in the RoadMap section further below.

Process/chemical engineers, mechanical engineers, technical specialists, and anyone who needs fast, reliable engineering calculations.

If you’d like to report a bug, request a feature or ask a technical question we’d love to hear from you

Email: prt_support@chemtools.io

Responses are typically within 1–3 business days.

ChemTools is expanding. Planned additions include:

API 2000 calculations for sizing pressure relief systems for storage tanks
Two-phase calculator (API 520 Annex C)
Implementation of the UNIFAC model to account for non-ideality in liquids
Calculators for specific relief scenarios, e.g. control valve failure, pool-fire etc.
Web‑based versions of selected tools
A Peng-Robinson binary interaction parameter (BIP) regression tool for users who wish to fine-tune the

Development priorities are based on user feedback and real‑world engineering needs.