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Thanks CompositePro and LittleInch for your responses. Yes, the liner extends to the flange face (standard practice in my experience) The manufacturer also claims that the "detachment" is industry standard, in line with what CompositePro stated. Thanks again guys, much appreciated!

For one of our projects, we have a PFA Lined piece of equipment. On inspection, we found out that the liner is detached from the face of the flange (about 2-3 mm). The supplier claims that this is normal practice and the gap will close once the piece is bolted to the pipe. I am sure that will be...

We are designing a process plant under EN 13480, one of the fluid is Hydrogen Cyanide and our HSE team has deemed it as a "Category M fluid". As far as I am aware, Category M is not defined as such under EN 13480 (or PED). Am I missing anything in EN13480 that lays down rules for designing a...

Hi all, I need to specify tensile test that shows how the mechanical properties vary across the wall thickness of the pipe (X60 pipe, heavy wall... over 45mm) API 5L reads something on the lines of "tensile test probes shall be representative of the wall thickness of the pipe", but our design...

Redpicker, Thanks again for the info provided. Regards, gatossi

Redpicker, Thanks for your quick reply, we are doing exactly that... i.e. talking to our pipe manufacturers and see what they can offer to meet our requirements... One of the manufacturers mentioned the fact that the pipe can't be monogramed as it is outside the scope of table 9, but they...

Hi all, Our client in the middle east has specified an 14" API 5L X60 with a wall thickness of 55 mm (minimum), i.e nominal around 60mm In accordance with Table 9 on API 5L 45th Ed our pipe doesn't fall under the "Permissible specified outside diameter and specified wall thickness" therefore...

Drexl, No, couldn't find any requirement like that on EN13480. Thanks for the tip. As nobody else is replying I guess is a very open issue!

Drexl, In which part of EN 12952 is that requirement mentioned? I might find a mirror on EN 13480. Thanks

Hi all, I'm specifying pipe to EN10216-2 and I find that there are two different categories for testing, namely TC1 and TC2. They mainly differ on the NDT for longitudinal imperfections. I couldn't find any reference on which one to select on EN13480-2 or -3. Can anyone bring some light on...

It would be nice if somebody can list briefly the changes introduced on the 2008 revision.

pennpiper, Yes! you are right... this things are damn expensive! Our supplier says he can do the stub-end, that is not my concern. My concern is on the flange itself. Duplex is a listed material (as opposse to Zirc, which is not) But the only reducing flange on Table 6 of B16.5 is a slip-on...

Hi everybody, Our client wants to install a 18" line at the bottom of a tank which has a 24" nozzle. We have two options: 1) either we use a reducer (very expensive as it is made of zirconium) or, 2) we use a reducing lapped flange (18" stub end on zirconium sized to match the 24" face, flange...

I have a butterfly valve on LP Nitrogen and Instrument Air (9 barg @ 85ºC) with hard seats (SS 316L). What will stop me on changing it to Soft Seats (PTFE)?

Europipe, The pipe spec does not cover 1" gate valves, only have globe valve at 1". Therefore I have to ways of action... either to use the globe valve and do nothing else... or try to engineer the valve spec and bring the gate valve spec down to 1". Quark, All the CS spec use piston valves for...

europipe, That was my first shot! to use gate valves... but I couldn't find any reference on the vendor literature (at least the one I had on hand) for 300# SS Gate Valves smaller than 1.1/2". And I need a 1" valve. Are 1" 300# SS Gate valves readily available in the market? I think this...

Firstly I want to thank both of you... All other steam trap legs are installed on CS lines, but this one is intalled on a SS line (I'm not pretty sure why) Is it recomendable to install a CS valve on a SS Line, won't that acelerate corrosion (I know steam is not likely to be corrosive, but...

Hello, I have a drip leg on a 300# - SS316L line where I have to select a couple of "block" valves (1" size) Previously the line was 2" and we had gate valves installed (Press 30barg, Temperature 300ºC, that's why we didn't use ball or plug valves) The vendors catalogues for SS gate valves go...

caihui, Sorry to say this time you are wrong... at least in respect with the spec... We specify (bearing in mind this spec is 8 years old!) BS5351 Ball Valves Reduced Bore 600#. I don't have any objection with full bore valves for this application (process plant... no pigging, no probe going...

Katmar, that is exactly what I meant... thanks!