Incoming Inspection AQL Sampling of Bulk Textiles

J

John356Boy

#1
I have a company that imports safety related textiles – suppose in automotive terms you could relate this to say seat belt webbing material. We have no ability to check the manufacturing process. We are down to imposing a statically valid sampling system on incoming – very old philosophy I know but...

I have long time ago used the old Mil 105 and am familiar with the newer BS6001 / ISO2859 but this was for discrete parts. I do know that the moment you start tampering with the sampling the whole credibility goes out of the window – suppose crux of the problem is how to take random samples from a reel of bulk material?

Help required!

John
 
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Stijloor

Staff member
Super Moderator
#2
I have a company that imports safety related textiles – suppose in automotive terms you could relate this to say seat belt webbing material. We have no ability to check the manufacturing process. We are down to imposing a statically valid sampling system on incoming – very old philosophy I know but...

I have long time ago used the old Mil 105 and am familiar with the newer BS6001 / ISO2859 but this was for discrete parts. I do know that the moment you start tampering with the sampling the whole credibility goes out of the window – suppose crux of the problem is how to take random samples from a reel of bulk material?

Help required!

John
Can someone help John?

Thank you very much.

Stijloor.
 
A

Alexisss

#3
I am sure there is a procedure described in an ISO/TR that I have at home. I am currently on a honeymoon trip :)

I promise to check upon return and tell you the number! :bigwave:
 

Tim Folkerts

Super Moderator
#4
There are a few questions that come to mind ...

  • Is it possible to check material near the center? If not, you almost have to use parts of the material before you can get to later parts to test.
  • Is the test destructive? Do you have to cut the material to get a sample? This might leave you with pieces that are not suitable for use (for example, a 100 m roll where you test a total of 1 m, but you are left with random length pieces that are tough to work with)
  • Is testing expensive? Does it shut down production to get test pieces near the middle of the roll?
Sampling is an "insurance policy" against really bad products. The goal should to come up with an "insurance policy" that makes economic sense -- the cost of testing is less than the cost of failures. You will have to decide what makes economic sense for your situation (or tells us more and ask more questions).


Tim
 
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