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Thank you for your input eadwine. I have worked with NACE standard before. This thread topic is not a question on NACE but rather with CSAZ662.

Sorry, I hit the wrong button before I finished my writing. There is nothing wrong to use a higher quality material but for the purpose of developing a company standard (in this case a pipe spec), it is wrong to blindly copy another project's commercial decision (or other project decision)...

Yes. Totally agree. I learned from him on how to work out the reason for selecting a metal or NDE. It is because of his example, that's why I could not accept the choice of CAT II material for sour service without a sound technical explaination.

Snorgy, Gee, very good explanation!!! You talk like two metallurgy guys I know, Roy and Mike in Calgary. Yeah, I know what you mean when you are talking about degradation of engineering overall. Engineer skills are under valued and we are governed by high school grads (procurement and...

Hi Snorgy, Yes, that's right it was your comment. And as I stated, I'm sorry to have picked your comment to use as example to help me get answer. Yes, I completely agree with your first paragraph. Those are the remedies to limit HIC, SSCC/SOHIC. But the last sentence in your second...

There was a good thread going on in this forum regarding material substitution and someone said this, "With respect to the sour service issue in Alberta, there seems to be a strong preference among our Alberta clients to default to Category II whenever a service is "sour", if only to get the...

Pennpiper, Thanks for your input. Naturally if the client does not want clamp on shoe then you don't use it. I think I clarified that clamp on shoe is just for longitudinal sliding action and not suitable if there is some form of lateral load. Anyway, a pipe shoe is not a pipe anchor. I...

I would love to hear from piping guys on this subject. This is just for my curiosity. A few weeks back someone asked me if it is ok to use a clamp type shoe instead of the welded on pipe shoe. Based on my limited exposure to piping stuff in the past, I know that clamped on type shoe is...

Murec, eliebl and moltenmetal are correct. You don't have to register the piping in water service. However, most, if not all fittings you buy is likely already have a CRN number in Canadian jurisdictions and so it should not be a problem to get and should not be any cost extra; correct me if...

Thank you SJones for pointing it out for me. I found what I needed.

Hi all, I've been trying to find the definition of what material should be used for Curve A,B,C, and D on Fig. 323.2.2A. I reviewed Appendix A and Table A-1 and can't find any note that tells me which curve to use for A106/A333, and 1.25/2.25 Cr pipe. Can someone point the way for me? I...

Thank you Steve for the tip. I'd review those sections tomorrow in detail.

I just found a thread 809-43564 that asked the same question in the past but did not have much of a respond. Is there a quality difference between the two? Is one better for sour service than the other?

Hi, I'm trying to figure out what is the difference between API-5L PSL1 and PSL2. Now that IHS won't allow you to save nor print the document, I have to read it on line and I find it very difficult to flip pages to read. I have not been able to figure out what is the key difference between...

Sjones, Thanks for your reply.

Stanweld, Thank you for your suggestion; it is one choice for lot definition I could consider with my inspector to define before we start the job. The other choice I have been advised (by piping fab shop) to use for field piping is to define the lot as the amount of welds done in a day. I...

Hi all, Can someone show me how to define a pipe lot size for the purpose of NDE? I heard there could be many ways to do this but I don't know what they are as I don't do piping much. B31.3 specifically tells you that the amount of RT, or any NDE, is to be applied to a "lot" of pipe. So...

Hello, Thanks to all that reponded. Rconner, it is exactly those issues that are formost on my mind when I approached the problem of hot tap. That is why I try to look for any experienced input on size limitation. Jte's input concures with a standard I have read from a major oil sands...

Hi, I'm new on this subject of hot tap. Does anyone know if there is a rule of thumb or design guideline in an industrial standard that says what is the maximum diameter (size) of branch you can hot tap onto a run? I have read one company's standard that says you can only hot tap and install...