Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here


burst disk sizing for liquid flow with pump

burst disk sizing for liquid flow with pump

burst disk sizing for liquid flow with pump

I'm trying to verify the burst disk capacity of an existing system. The over pressure scenario is a pump continuing to pressurize a tubing system with a valve closed downstream. I'm using the resistance flow method because the tubing between the pump and the burst disk is 1/4" but the burst disk holder is 1/2", so the coefficient of discharge method doesn't apply. I was trying to follow the Fike burst disk sizing examples for the resistance to flow method but it really doesn't correlate to a pump pressure source. So how do I verify the burst disk capacity?

The particulars:

Pump flow = 0.0145 cfm
tubing internal diameter = .083"
burst disk size = 1/2" NPT
Krgl = 5.39
The pressure loss between the pump and the burst disk consists of a tube section, tee branch, expansion.
The burst disk outlet vents to atmosphere.

RE: burst disk sizing for liquid flow with pump

A sketch would have been nice. Just calculate the backpressure on the pump discharge from the flow through tube section, tee branch, expansion, and open disk. If the BP is less than or equal to the allowable accumulation, it's okay. Refer to Crane TP 410. It has plenty of examples that will help you.

Good luck,

To a ChE, the glass is always full - 1/2 air and 1/2 water.

RE: burst disk sizing for liquid flow with pump

What are you trying to calculate? burst disc "capacity" isn't normally something you look at.

However equally I don't recall a bursting disc being used in these sorts of systems either, because they are too likely to go off and then take time and effort to replace and also the contents then have to escape somewhere. A pressure relief valve is much more common in this type of scenario.

A BD is normally used either where pressure build up is so rapid that a relief valve can't open in time (High pressure tube failure on S&T HX being a classic example) or where the likelhehood of an event is very very low and no one wants to have a relief valve.

Over pressure from a pump against a closed valve doesn't cover those scenarios.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

RE: burst disk sizing for liquid flow with pump

"Burst Disk" also known as a rupture disc, a pressure safety disc, burst disc, bursting disc, or burst diaphragm, is a non-reclosing pressure relief device that, in most uses, protects a pressure vessel, equipment or system from overpressurization or potentially damaging vacuum conditions.

Full Line of Rupture Disks - Metal or Graphite Solutions -
zookdisk.com‎ (Adwww.) zookdisk.com/our-products/‎
(800) 543-1043
Leading Manufacturer of Rupture Disks. Request a Catalog or Free Quote Today!
Rupture Disk Specialists · Global Industry Leader · Leader In Rupture Disks
Highlights: Competitive Pricing, Emergency Support Service, Customized Solutions…

Sometimes its possible to do all the right things and still get bad results

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Research Report: State of IoT Adoption in Product Development 2019
This research report, based on a survey of 234 product development professionals, examines the current state of Internet of Things (IoT) adoption by product design teams, its perceived importance, and what features and capabilities teams consider important when making decision about adding IoT functionality to their products. Download Now
Research Report: Augmented Reality for Maintenance, Repair and Overhaul (MRO)
The term Industry 4.0 denotes a cluster of technologies that’s poised to fundamentally reshape manufacturing and bring about a new industrial revolution. These include 3D printing (AM), the Industrial Internet of Things (IIoT), artificial intelligence (AI) and mixed reality technologies, more commonly known as virtual reality (VR) and augmented reality (AR). Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close