NACE compliant pipes vs. Non-Nace pipes

[jabe08]

Hi,

Need some advice.
I am reviewing technical requirement for CS pipe to be supplied for a project. Most of the items requires compliance to NACE MR0175/ISO15156.
When ordering the pipes to mills, we stipulate "must comply with NACE MR0175/ISO15156". Can anyone advice what is/are actually required in order to certify the pipes in compliance to NACE?
Does it require HIC or SSCC testing in order to comply?
I was comparing some MTC and noticed some mills certify NACE MR0175 "hardness" only

Thanks

 

[redpicker]

In the past, the purchaser could get away with the statement "must comply with NACE MR0175" and leave it up to the supplier to figure what was required for the purchaser's application. Obviously, there are problems with this as the supplier often does not know nor does he have the ability to control the environment.

Now, the standard makes it clear that the must define the requirements the manufacturer has to meet.

Simply stipulating "must comply with NACE MR0175/ISO15156" doesn't cut it anymore.

rp

 

[EdStainless]

There are both composition and hardness limits, and in some cases special testing.
The reason that the purchaser must specify the requirements is that they are the ones that know the application.
There are some alloys that are permitted to be used in a range of environments (different severity) but different testing is required, more tests for the more severe applications.
You must spell out the details.


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Plymouth Tube

 

[SJones]

thread338-224283

thread338-357592

thread330-323877

and various others from

http://www.eng-tips.com/search.cfm?...2&searchtype=1&searcharea=1&d=1&action=search

Steve Jones
Corrosion Management Consultant

http://www.linkedin.com/pub/8/83b/b04

All answers are personal opinions only and are in no way connected with any employer.

 

[Ron]

Why would you specify something when you don't know what it is? Get a copy of the standard and know what it says and means. Then you can legitimately specify it if you need it. If you don't actually need all the requirements, then only specify what you actually need.

 

[SJones]

In addition, the only party able to 'certify' compliance with NACE is the end user. That's why the 'hardness only' approach is being taken by manufacturers as that is one of the very few ISO 15156/NACE MR0175 required parameters that can appear in inspection documents, and they cannot certify what service the material goes into.

Steve Jones
Corrosion Management Consultant

http://www.linkedin.com/pub/8/83b/b04

All answers are personal opinions only and are in no way connected with any employer.