Can we differentiate CS and LTCS?

How can we differentiate LTCS and CS?

How can we identify LTCS from CS? 

Can LTCS be detected by PMI? 

These are some common questions we face at work site, where Carbon Steel(CS) and Low Temperature  Carbon Steel (LTCS)  are used.

The answer is NO,  unless there is a clear marking/ traceability.

SA-106 Grade B : Specification For Seamless Carbon Steel Pipe For High-Temperature Service.

SA-333 Grade 6 : Seamless and Welded Steel Pipe for Low-Temperature Service and Other Applications with Required Notch Toughness

Please see the below table for the chemical composition of LTCS and CS for their pipe form. There is no remarkable difference from which PMI methods can differentiate both. So we cannot differentiate LTCS and CS materials with out marking/identification.

Click the below link to see one of the methods of handling the mix-up based on ASME B 31.3

 https://www.whatispiping.com/cs-in-place-of-ltcs

The above link will guide you to a website which is not owned by this blogger. Use the link and it's contents at your risk and cost.

Disclaimer: Photos are taken from different websites. If this violates any copyright rules this will be removed. Please inform me if any of the photos or contents violates copyright rules. (through 13hareesh13@gmail.com). This blog is meant for educational purpose only. If it is used for any other means without the written consent from the author, the author will not be responsible. Author does not guarantee the accuracy of data used in this blog.All the information, data, photo/image, calculations presented in this blog should be used at the sole risk of the user. The blogger is not liable or responsible in any way for any damage, losses or costs arising from use of the blog for any purpose whatsoever or whosoever it may be. The blog is to be used at your sole risk and responsibility.