nfpa 652: dust hazard...
TRANSCRIPT
NFPA 68
NFPA 68 is the standard on explosion protection by deflagration venting. It covers the design, location, installation, maintenance, and use of devices and systems that vent the combustion gases and pressures resulting from a deflagration within an enclosure so that structural and mechanical damage is minimized.
NFPA 68 REQUIREMENTS
• Documentation: NFPA 68 lists 19 documents that you must keep on record
• Inspection: Vent closures must be inspected at least annually. The inspection process consists of 16 steps, detailed in NFPA 68.
• Maintenance: A maintenance plan must provide for maintenance of the vent closures following an upset, act of nature, or turnaround.
• Training: All employees operating, maintaining or supervising facilities must be trained.
• Record-keeping: You must keep all records for a minimum of three years.
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NEW MANDATORY REGULATION
The 2016 revision to NFPA 652 made Dust Hazard Analysis (DHA) mandatory for all businesses creating, handling or transferring explosive dusts.
The deadline for completing a DHA was September 7, 2020.
This legal requirement is enforced by OSHA. If you have not yet completed a DHA, you are liable to fines or worse from OSHA and other regulatory bodies.
WHAT IS A DHA?
NFPA 652 defines a Dust Hazard Analysis (DHA) as “a systematic review to identify and evaluate the potential fire, flash fire or explosion hazards associated with the presence of one or more combustible particulate solids in a process or facility.”
It is only the review must be completed by September 7. Any recommendations coming out of it can be completed after that date. A common recommendation is to verify that existing explosion panels are designed per NFPA 68.
Oseco-Elfab can support you with venting requirements and compliance with NFPA 68
NFPA 652:DUST HAZARDANALYSISWhat has changed? What do you need to know?
The Oseco MV Family of explosion vents offers the industry’s best perfor-mance tolerance of +/- .25 psig.
Each of these vents meets the requirements of the OSHA Combustible Dust NEP and NFPA 68.
Resources
Click on the links below to download these free resources.
• NFPA 652 (login required)
• NFPA 68 (login required)
• Vent Sizing Worksheet
Contact us
Oseco-Elfab is available to customers 24/7, 365 days per year.
Call Technical Support at 800-395-3475 to receive help with any vent related questions.
You may also visit www.oseco.com
SERVICES
Inventory Management SupportOur Explosion Vent Stocking Program allows customers to receive vents at a reasonable cost when they need them in a hurry.
Expert Engineering SupportOur Technical Support team is there to provide engineering support with the vents, whether that is sizing, guidance per NFPA 68, documentation or pressure management advice.
Vent Sizing WorksheetOur Vent Sizing Worksheet can help you determine the vent that will ensure your safety and protect your equipment. It covers areas such as:
• Operating Pressure/Temperature
• Vacuum• Number of cycles per day• Burst Pressure/Temperature
• Kst and Pmax• Vent L/D ratio• Vessel Volume• Current vent information if
available
Oseco-Elfab’s solutions
Let us help you with all your pressure relief questions.
Call us at 800-395-3475
or email us at info@osecocom.
www.oseco.com
Call us at +44 (0)191 293 1234 or email us at [email protected].
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