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DekDee - we're getting a lot of that. And wordsmithing of our standard documentation besides. Just spoke with my CWI - turns out that we can't double up on PQR's i.e. one with PWHT but no Preheat, another with Preheat but no PWHT, to qualify a WPS with both. Seemed logical, especially since...

Thanks, This clears it all up, especially RP 582. Carbonates are even listed at 1200 to 1250 deg F. I think we can still use our existing PQR's to write up a new WPS. The temperature increase on PWHT is only 50°. Hardness testing passed at the lower PWHT, so I don't believe a new PQR is...

I'm over my head here. As far as I can find in either, 1125 +/- 25°F (i.e. 1100°F min) - 1 hour per inch / minimum of 1 hour is correct for standard P1 materials. I have a customer (actually customer's customer's engineer in another county - so communication is difficult) who is stating it...

Figure 127.4.8-4 (a) shows a full penetration weld between nozzle (branch) and shell (header) - set on. Figure 127.4.8-4 (b) shows a second detail - but insert style. My interpretation has always been that the external fillet weld has to be 3/8" minimum to achieve a minimum 1/4" throat. In...

Looking at an engineering datasheet for a vertical basket strainer. It lists under materials of construction: * Strainer Case - API 5L PSL-2 X52 Pipe i.e. the shell of the vessel portion. It also lists - Governing specification: ASME B31.4 / Section VII, Div 1 (not a typo - "Section VII")...

Customer purchased a 12" Tee strainer with A234 WPB body. We were just informed it will be butt welded into a pipeline with API 5L X52 pipe. What are the issues with compatibility and welding? Design Pressure/Temperature is 1040 psig @ -20 to 150 Degrees F, within the operating range of the...

They were in the middle of trying to install and found out they can't get around the belly of the strainer with the studs projecting. Needed to pull the assembly apart to get them in place, and thread it all back together. Neither strainer nor butterfly valve literature recommends this...

Here's the photo.https://files.engineering.com/getfile.aspx?folder=5da7f25d-e8f2-42f1-9463-6b7acb37da45&file=BFVtoSTR.jpg

I've attached a photo a Butterfly Valve being bolted to a Cast Iron Strainer - 8" Class 125 installation. My concerns: 1. Turbulence - the butterfly valve is only rotated off by one bolt, so the load balance under flow as it feeds into the strainer won't be greatly affected. However, it is...

They are being installed in a B31.3 piping installation. Fluid is process water. LCB material is specified. The strainers themselves are designed per ASME B16.34.

If B31.3 - "To avoid duplication of effort and subject to the approval of the owner..." The owner has the final say-so on if using other's WPS's and PQR's is allowed.

We have a project using cast Y-strainers, Class 150 and 300, 6" size and smaller. Material is A352 LCB, rated to -50°F, with Charpy impacts. Customer has asked for threaded NPT plugs to be seal welded - size 1/4" Easily do-able, 2 minutes single TIG pass, but: Does this require Post-Weld Heat...

Thanks for the prompt replies - and apologies for not responding until now. The customer of ours with the issue sent his GTAW WPS. It specifies ER320LR, F#45, A#N/A(non-ferrous) and .030 to 3/16 filler metal with a 60°F preheat temperature. As I noted, I'm not a welding engineer, but in my...

We have a weld procedure for P45 to P45 material that has worked fine, but recently had an issue with 1-1/2" socket weld fittings made from cast CN7M. Some of the castings developed pinhole leaks near the welds in the heat affected zone. Hydrotest, air test, visual, and dye penetrant...

Interesting question: ASME U Stamp Pressure Vessel - Adding a bleed ring between a blind flange cover and the vessel proper. Does the bleed ring have to be ASME Stamped? Is an R Stamp required? 12" Vertical Body - Sch 40/Std SA-106-B Pipe with Class 150 SA-105 weld neck flange and Class 150...

All, Thank you for the responses. I've been out due to Hurricane Florence. Customer is actually starting to understand. With four pieces cast in the same heat, he didn't realize that the inspector was basically testing the same material over and over again. Seen in that light, 13/16 15-sec...

Thanks for the feedback. Does anyone know of a good white paper or article discussing this subject? Something that I can present to the end user? All the literature that I am finding is either very technical or hyping up the capabilities of the method. I’ll dig into it more When I get back...

I love handheld PMI and I hate handheld PMI. A recurring theme over the last ten years for me - dealing with customers using a third party inspector to perform PMI in the field. My company manufactures and supplies cast pipe products in various alloys. We have two handheld XRF analyzers that...

Curtis, I did some research and yes, you're right: Saskatchewan, B.C., and Manitoba would exempt our check valves (ASME B16.34 & API-598). However, we have approval in these provinces - for sales, it's a lot easier to have a CRN on file than to explain "no, we don't need it, and here's...

Thank you Ganga, Our earliest CRN registration date is 2/1/09. Given the time period required for review, would you think applying in July or August would provide sufficient time to avoid a lapse? Geof.