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Cut corners! Corners cost money!

"I thought those systems did a low-voltage check of the entire wire-out to ensure this sort of thing didn't happen..." Actually no, nowadays they don't use electrical detonators. At least not for big jobs like this. They use detonating cord.

Here is the official list of EU directives and their associated harmonized standards. Click on the name of the directive for the list for each directive. http://ec.europa.eu/enterprise/policies/european-standards/documents/harmonised-standards-legislation/list-references/index_en.htm

The usage is for gasturbine units for oil & gas production and pipeline operation. Since the oil & gas industry is predominantly API/ASME/ASTM centric I think we can safely assume NPT. Thanks to all for taking time to help.

It is not for a specific project. I am setting up new internal component standards for ASME pipe fittings and adding our own article numbers and design directions. To simplify for the designers I would like to add this type of information from the outset rather than having the designers figuring...

Most probably NPT then since you want a tight connection. Thanks for your replies.

Thanks for your response. That then limits my possible candidates to NPSC, NPSM and NPT. While I think we can rule out NPSM as it is for mechanical use I still don't know if it is a straight or taper thread. PS I haven't got access to B1.20.1 or MSS SP-97.

Here's a total newbie question for you. For Bonney Forge Threadolets they state the outlet size as a size in inches. But there is no clue as to what thread type it is. I can only conclude that its somehow assumed that the reader already knows. My problem, I don't know and there are a lot of...

Thanks John Breen, I found my answer in your first link, section 5.2. It clearly says that for flanged joints the bolting should be UNC up to and including 1" bolts and 8-UN for bolts larger than 1". Again thanks John, I have made bookmarks of your links. Brilliant!

The problem is that niether ASME nor Texasflange give the thread, only the thread diameter. If we take the example of a 2" bolt. A 2" UNC has 4,5 threads per inch, while an 8-UN has 8 threads per inch. That to me would suggest that it would be easier to achive the required clamping force in the...

Hi All, What type threads should I select for flange bolting (ASME B16.5)? I understand that for smaller size bolts (up to 1") UNC is the normal way to go. But what about the larger sizes? Do I stay with UNC or do I switch to constant pitch threads like 8UN or similar? Which is more common? Are...

I didn't think SA-213 was applicable since it is called "...Boiler, Superheater, and Heat-Exchanger Tubes". But OK, our tube supplier is also refering to A 213. Again thanks!

JLSeagull, Thanks, it is A 1016 I am after (I think) because its hydraulic tubes I am concerned with right now (for Swagelok connectors). I had another std quoted for me (A 450) but I noticed that the stainless portion has been deleted between the 04 and 07 editions. But it is a bit confusing...

What ASME standards specifies tubes? For pipes there is B36.10 for carbon steel pipes and B36.19 for stainless steel pipes. Problem is that I can't find an similar standard for stainless steel tubes. Also, how should I specify the tubes? Pipes you specify by NPS + Schedule + material. How does...

Thanks Steven, That was exactly what I wanted to know. Unfortunately I think that there are quite a lot of non-US manufacturers that confuses these designations. At least judging from their catalouges. That why I asked, just to be sure. Again, thanks.

Thanks LSThill, great spreadsheet. It will undoubtedly come in handy. Unfortunately it didn't answer my question. I think I perhaps were a bit unclear. It is the material designation that I have a problem with. - Can a tube/pipe be of WP316L (example) or is always TP316L? - And vice versa, can...

I get confused. When looking in manufacturers catalogues I find pipes/tubes having both WPxxx and TPxxx designations. On the other hand, I am also finding fittings with both designations. My understanding has so far been that TPxxx refers to tubes/pipes only and that WPxxx refers to the...

pennpiper, thanks, sorry for being unclear but as you could guess my native language isn't English. I do understand about P/t ratings and material types but I think JLSeagull is more on target. That is, I would like to now the source of the Class numbers. How did they come about in the mists of...

I have been searching high and low for an explanation on how the pressure Classes are defined. In ASME B16.5 (and others) the flanges are divided into Class 150, 300, 600 etc. Could someone please explain to me where these numbers stem from? I erroneously assumed they where nominal pressures in...