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...
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...
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...
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...
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...
My company has current registration for our products (pipeline fittings - strainers, check valves).
Looking ahead, they expire next year. I'm trying to find a listing for renewals, but all I can find on the various Province sites is for new fitting registrations.
Is anyone familiar with the...
Our heat treating contractor just sent a unit back. Reviewing the charts, we found that the unit was post weld heat treated at 1250°F instead of the specified 1150°F.
The item is a T-strainer - constructed of carbon steel body and flanges.
Will this cause any problems?
My company doesn't work with Cr-5/0.5 Mo very often. We recently had an application that requires (2) 12" Sch 40 Weld Caps, in addition to pipe and flanges, for a small welded component.
Our regular stocking vendors came back with pipe, flange, and plate quotes as required. However, I...
This is not really a code item, but I'm looking for a rational way of rating a strainer element.
When determining the maximum dP across a strainer element, my company has traditionally used Sect VIII internal pressure calculations with a deduction for "plate efficiency" based on hole pattern...
I've been asked to look at concrete paving in my town and make recommendations for repairs.
One item that is "interesting" is the growth of cracks and expansion joints at street curves. Intersections don't seem to have the problem.
I found one reference that states "Thermal expansion effects...
I hope this isn't too far off the subject...
We have some old in-floor wire duct - circa 1962 - that we are using for computer & comm lines.
In an upcoming renovation, we want to dress it up a little bit. Unfortunately, I can't identify the manufacturer. The only markings I can find are the...
My company was looking at switching to the Carel PCOxs PLC for controlling rooftop HVAC equipment.
Is anyone familiar with this type of PLC?
It is designed for the HVAC field. Looks great - easy to install analog temperature inputs and analog outputs for "modulating" burners and dampers. A...
Pardon the buildup, please:
I work for an HVAC Manufacturer that produces a line of industrial heating and cooling equipment. In recent years, the business has fallen off quite a bit.
I recently visited the US Burea of Economic Analysis. The entry that floored me was NAIC Code #230210...
I've got a customer with an application in which every 5-10 years he has to replace a duct furnace. It rusts out, apparently due to moisture generated by a cooling coil.
I'm recommending he install a drain pan immediately after the coil.
Does anyone have other recommendations? Also, is there...
I work for a manufacturer of direct & indirect gas-fired HVAC equipment. One of our competitors has started using "premium nitride hot surface igniters" instead of direct spark or pilot ignition systems.
I'm researching them - reading through the literature, and may buy a few to test.
Can...
