Jump to content

  • Quick Navigation
Photo

Pipeline Metal detector - industry guidelines


  • You cannot start a new topic
  • Please log in to reply
3 replies to this topic

Rachu19

    Grade - Active

  • IFSQN Active
  • 14 posts
  • 0 thanks
0
Neutral

  • United Kingdom
    United Kingdom

Posted 18 September 2019 - 05:17 PM

hello there, 

 

We have a pipeline Metal detector to check our products(Sauces). we carried out a challenge testing using a metal clip which we use to seal our bags. the metal detector alarms, but the piece does not get rejected into the reject bin. we had to dismantle the depositor and the pipes and found the pieces inside the depositor. we thought this could be due to reject delay timing set on the MD, but even after increasing the timings it did not help. For me this is a complete failure of our CCP.

 

We called the external engineers who calibrate our machines to be told we might have to change our metal detector. :helpplease:

 

can anyone help on how we can get around this issue, is there an industry guideline for pipeline MD?

 

thanks 

Rachu



QAGB

    Grade - PIFSQN

  • IFSQN Principal
  • 671 posts
  • 255 thanks
107
Excellent

  • Earth
    Earth

Posted 18 September 2019 - 05:48 PM

hello there, 

 

We have a pipeline Metal detector to check our products(Sauces). we carried out a challenge testing using a metal clip which we use to seal our bags. the metal detector alarms, but the piece does not get rejected into the reject bin. we had to dismantle the depositor and the pipes and found the pieces inside the depositor. we thought this could be due to reject delay timing set on the MD, but even after increasing the timings it did not help. For me this is a complete failure of our CCP.

 

We called the external engineers who calibrate our machines to be told we might have to change our metal detector. :helpplease:

 

can anyone help on how we can get around this issue, is there an industry guideline for pipeline MD?

 

thanks 

Rachu

 

 

I'm surprised your metal detection company can't offer to fix your depositor. Can you actually set the length of time the product is ejected from the metal detector? You're going to lose product, but you'll not have metal just sitting inside your equipment. If the length of rejection time doesn't fix it, then there's either a flaw with the depositor or the flow of your product is not forceful enough to remove the metal. I think you should look at that first to find out why the metal isn't being rejected.

 

An alternative (not really the best alternative since it doesn't fix your rejection issue) would be to put a filter/sieve (and possibly magnet as well) before your metal detector. That way you can capture the larger foreign material, and most metals. It will help reduce some of your issues...but I would suggest you dig deeper into your metal detector's rejection situation first. There's no good enough reason why you should have the metal clip stuck inside the equipment.



Eric G

    Grade - Active

  • IFSQN Associate
  • 8 posts
  • 4 thanks
0
Neutral

  • Canada
    Canada
  • Gender:Male
  • Location:Toronto, Canada

Posted 18 September 2019 - 07:15 PM

1) Are you testing inline with other types of contaminants? If so are they being correctly rejected? 

2) You must also consider the flow rate, pipe diameter and response time of the reject valve and distance between the MD and valve.  It is completely possible that it just isn't going into reject fast enough.  If you can supply those numbers, i'll be happy to run them for you. 

 

Which brand of MD do you use? 

 

Eric



SQFconsultant

    SQFconsultant

  • IFSQN Fellow
  • 3,772 posts
  • 947 thanks
840
Excellent

  • United States
    United States
  • Gender:Male
  • Interests:American Patriot
    WWG1WGA
    Never give up, never give in - always win!
    Martha's Vineyard Island, Massachusetts

Posted 18 September 2019 - 10:33 PM

Have the company that installed the inline system check the flow speed (speed of product moving thru the pipe) and time the system that way - this happened to a client and what they decided on was to do a two stage detection due to speed of the line.

 

So there is technically a "redundant" detector after the first one - the first one is located about 50 feet before the blow out point, once detected a gate closes to any further product coming thru and the product speed is greatly reduced so that by the time it gets to the second stop it has slowed down very much and then an entire 50-75 feet of sauce is blown out. 

 

They are now trying to get it down to 10-20 feet.


Kind regards,
Glenn Oster
 
GOC BUSINESS GROUP | SQF System Development, Implementation & Certification Consultants
Internal Auditor Training - eConsultant Retainer Subscriptions - Pre & Post SQF-GAP Audits - Consultant Training
Visit us @ http://www.GlennOster.com  or call us @ 772.646.4115 US-EST 8am-4pm Anyday except Thursday
 
 

Thanked by 2 Members:



0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users