Skip to main content

AIChE The Global Home of Chemical Engineers

Toggle secondary menu visibility Menu

AIChE Home
About
Contact AIChE
Leadership
Events
Communities
Membership
Learning & Careers
Publications

Careers at AIChE
IDEAL Path
Giving
Students
Young Professionals
Operating councils
Local Sections
Committees
Awards

Other Sites & Tools

Engage
ChEnected
SmartBrief

Technical Groups

Follow AIChE

Toggle main menu visibility

Join

Toggle communities menu visibility Communities
LEARN MORE ABOUT AICHE'S COMMUNITIES

Technical

Divisions & Forums

Industry Technology Alliances

Technical Entities

Professional/Personal Growth

Students

Early Career

Fellow

Local Sections

Societal Needs

IDEAL

Partners

Leadership

Board of Directors

Operating Councils

Committees
Toggle membership menu visibility Membership
Become a Member

Renew

Joining AIChE gives you access to an amazing network of top professionals in chemical engineering and related fields.

Pro Membership

Explorer Membership

Student Membership

Gift Program

Member Get a Member Program
Toggle events menu visibility Events
2025 Spring Meeting and 21st Global Congress on Process Safety

April 6-10, 2025 Hilton Anatole, Dallas, TX

2025 AIChE Annual Meeting

November 2-6, 2025 John B. Hynes Veterans Memorial Convention Center, Marriott Copley Place, Sheraton Boston | Boston, MA

Upcoming Conferences & Events
All Conferences and Events

Sponsor and Exhibit

AIChE Gala

Code of Conduct

Beware of Hotel Scams
Toggle publications menu visibility Publications
All Publications

CEP Magazine

The AIChE online library includes articles, journals, books, blog posts, and more on a variety of topics.

Journals

Books

eLibrary

Blog

Newsletters

News

Sponsored Whitepapers

Podcast

Conference Proceedings

Body of Knowledge

Permissions
CEP: April 2025

CEP: March 2025
Toggle academy menu visibility Learning & Careers
Institute for Learning & Innovation (ILI)

ILI provides students and professionals lifelong learning opportunities to innovate through collaboration, practice, and career discovery. Explore areas of advancement below.

Explore Areas of Advancement:

Career Discovery

Academy

Practice+

Credential

Job Board

Learners

Educators

Employers
Learning Center:

eLearning

Calendar

On Demand Webinars

About the Academy

Contact the Academy

Frequent Questions

SAChE Certification

Archived Webinar

Want to be an Entrepreneur? Personal Stories From Three Successful Entrepreneurs Who Have Traveled This Path.

Careers at AIChE
IDEAL Path
Giving
Students
Young Professionals
Operating councils
Local Sections
Committees
Awards

Join

Toggle CCPS menu visibility

Sign in

Toggle Education menu visibility Education
Process Safety Professional Credential (CCPSC)

Process Safety Fundamentals Certificate (CCPSf)

SAChE for Students and Teachers

Undergraduate Learning Initiative

CCPS Videos
All Courses

Collaborators
Toggle Events menu visibility Events
TSC Meetings

Regional Meetings

Process Safety Student Boot Camps

Faculty Workshops

PFFC Meetings

MMM Meetings

Conferences
All Events
Toggle Membership menu visibility Membership
Member-only Content

CCPS Fellows

Become a Member

Membership Costs

Professional Services Directory

CCPS Emeritus
About CCPS

Member Organizations

By-Laws
Toggle Projects menu visibility Projects
Active Projects

Accepting Volunteers

Accepting Peer Reviewers
Propose a Project
Toggle Tools menu visibility Tools
LOPA Database

PERD: Process Equipment Reliability Database

Process Safety Incident Database

Process Safety Glossary

Professional Services Directory

RBPS Resources Web Tool

Vision 20/20

Process Safety Metrics
All Tools

Collaborators
Toggle Publications menu visibility Publications
Books

CCPS on Knovel

Golden Rules

Process Safety Beacon

Process Safety Monographs

Process Safety Progress

Process Safety Summaries

Safe Work Practices (SWP)

Book of Beacons
All Publications

Toggle site search visibility

Sign In

Share

Can a “fail open” valve fail closed? - Danish

Share

Click here to download the PDF file.

You may also be looking for...

About
Member Organizations
Events
Become a Member
Education
Projects
Tools
Publications
Resources
CCPS Process Safety Beacon
Code of Conduct
Beware of Hotel and Attendee-list Scams

Follow AIChE

Communities

CCPS Center for Chemical Process Safety
DIPPR Design Institute for Physical Properties
RAPID RAPID Manufacturing Institute
SBE Society for Biological Engineering
AMPs Advanced Manufacturing and Processing Society
CPE Community of Process Engineers
CEI Center for Energy Initiatives
CHS Center for Hydrogen Safety
CIEE Center for Innovation & Entrepreneuring Excellence
DIERS Design Institute for Emergency Relief Systems
IfS Institute for Sustainability
IMES International Metabolic Engineering Society
ISWS International Society for Water Solutions
RES Regenerative Engineering Society

More Communities

Learn more about IDEAL
Learn more about our Communities

AIChE

Join
Sign In

Membership
Academy

About
Awards
Advertise
Code of Ethics
Careers at AIChE
Contact
Ethical Guidelines
Giving
Global
Press
Privacy & Security

120 Wall Street, FL 23
New York, NY 10005-4020

Other Sites & Tools

Engage
ChEnected
SmartBrief

Copyright © American Institute of Chemical Engineers.
All rights reserved.
AIChE® is a registered 501(c)(3). EIN: 13-1623892.