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I forgot to put some quantifiable findings. On the 16" joint, .125" radially, so .25" overall diameter reduction post welding. On another weld roughly .25" radially, overall .5" overall diameter reduction. Im no stranger to welding and stainless as I was a pressure welder. I understand why and...

All, I have an issue and would like to present it correctly. Code of construction is B31.3 normal. Client specs/standards do not address hoop shrinkage. B31.3 has an interpretation 25-27 that reads as follows... Question: Does ASME B31.3-2012 provide an acceptance criterion for the amount of...

In this situation I have always used an inline testing tool that seals beyond the butt weld and is also flanged. This way you prove the integrity of the weld joint and also the ability of the flange face to seal. At any rate you have to prove the ability of the flanged connection via...

Big inch, if you read my post you would see my intentions. The last contribution to this thread was Dec-11-2014, perhaps you missed that detail. As I bumped it with a very similar situation but far worse, I figured maybe we could finally get a more concrete answer seeing how that was not...

What were temperatures of the hydro test and the calculated max design service conditions? 15 degrees C, tested with water. Max design isn't listed on our Line Designation Table, Just design pressure, temp, operating conditions and hydrotest pressure 2. What was corosion allowance for the...

I dont want to start a new thread as I feel we can add to this thread. More information, one spot... Code of construction is B31.3. We have a piping system that is Class 150 flanges, System test pressure is 2940kpa (426PSI). System operates at 10kpa, design is 1034pka. When the system was...

I never once said you couldn't test instrument tubing using a pneumatic method. Not sure where you saw that. I was simply stating that to cover ones self, its best to fully understand the code AND your jurisdictional requirements. ABSA can 100% force you to do a hydrotest if your AQP doesn't...

moltenmetal you are wrong on a couple points. Jurisdiction trumps the code.. Anything over and above 31.3 that is a "shall do" item from ABSA HAS to be met! There is no deviation. Yes you can do pneumatic tests in Alberta according to 31.3, However being in Alberta the only way you can complete...

Is the material listed in the WPS? Is the Material listed in the WPQ? If the answer is no to either one. NO.

5% of total complete welds by this welder. If you have 10 complete joints, welded out, sitting on the ground, all done by the same guy. You have to do a complete RT on atleast 1 weld.

very valid point. We are considering going to b7, 2h bolt up like the rest of the plant, that is used on stainless flanges aswell. 150ft lbs on a 3" cl300 A182/304 flange.

The one table is for B7/2H bolt up. There will be a different value for a B8M/B8 bolt up as SS is much softer.

I cannot for the life of me remember where to find the given torque value for a B8M stud with B8 nut for a CL300 A182 RF flange, industry standard. .15-.19 lubricant coefficient. I am the Client, however for this plant project, there is only a standard for B7/2H bolted connections. This issue...

I'm an inspector in Alberta. The oilsands are tough to get into with zero contacts. Find an ad on Jobshop.ca/kijiji/radio station/etc. Email your resume, leave your phone number. Try your HARDEST to get a phone number. They hire and fire on the spot up there so you can catch them on the right...

I will look into this. I understand your point. completely. believe it is not a code requirement but more so a client request. If they are willing to pay, go for it.

I mis read your post. Missed the "after installed offshore" and thought you were doing your hydrotests to 25% design and was worried. For all of the piping I have personally dealt with, I would not accept it. It is not a "proven connection". Until that bolted connection is tested to 1.5x the...

what ansi rating are the flanges? What pipe size and schedule? What is the design pressure? What are you testing the line to? thank you

I wonder if the conractor has a guy qualified for full pen welds or not? I assume not and that is why they are calling for a partial. He could use backing bars and just weld it in the flat(rolling the beam to keep each weld in the flat position). Just thinking out loud. Thats how the fab shop...

What I do to maintain heat numbers is have a dedicated set of ISO drawings that only have Heat Numbers recorded and pointing at each item. More times then not you will have different heat numbers on pipe, fittings, etc, as you know. This has been the easiest way for me and made the client happy...

This is how we hydro everything. For Suncor in Fort Mcmurray we always included valves in our hydrotests. Always tested at 1.5 times the operating system limit. Very Rarely have I done any service tests as the process is not human friendly. We will isolate a line to do a carber test before we...