Hi, I am working on a project, where lugs will be welded to structural carbon steel plate.
The lug supplier lists the following DIN standards for welding lugs to mild or low alloy steel, is there an AWS equivalent or near equivalent for procedure / filler materials ?
DIN EN ISO 2560-A: E 42 6 B...
I'm involved in a pulp mill project, where we might take a look at screening gravel and chunks of debarking chain out of incoming hog fuel.
Wondering if anybody out there has any experience with what types of equipment are used. I've heard mention of using disc scalpers, but is there other...
Thanks everyone for the replies.
I've passed on my recommendation to not weld repair, and I'm going to review prior inspection history.
I am thinking the best course of action will probably be to buy a new lifting device, with possibly some design improvements.
Possibly this was being overloaded...
Hi,
Just wondering if anyone in the group has experience with evaluating cracks in square tubes forming part of structure of a below the hook lifting device.
Are repairs allowed depending on extent of cracking, or take out of service permanently the entire device ? Or replace the affected...
I ran some calculations per API 1102 using the Cat D8 LGP track ground pressure and for what appears to be the highest stress scenario of maximum operating temp, lowest installation temp (it gets cold up here !) and maximum internal pressure, API yields effective stress somewhat lower than the...
I notice in B31.4 under 402.7 Combining of Stresses it says you may combine stresses using maximum distortion energy theory. Which I believe to be Von Mises approach. So I used hoop + thru wall bending as stress in X direction, and thermal compressive stress as stress in Y direction...
Thanks again for the assistance.
Given that the pipeline is not likely fully restrained, what I have done for now is to estimate an X axis stress from compressive thermal stress and a Y axis stress from hoop stress/thru wall bending, and then calculate estimated principal stresses and Von Mises...
Thanks for the replies !
The pipeline I am dealing with is a restrained slurry pipeline, as it will be buried.
The issue is that the ASCE Guidelines for Buried steel pipe (americanlifelinesalliance.com/pdf/Update061305.pdf) have no method described for combining the stresses into a combined or...
Hi,
I am using ASCE buried pipeline guidelines to evaluate stresses in a buried slurry pipeline.
I have determined the through wall bending stress from earth and live loads, hoop stress from internal pressure, and then compressive thermal stress due to thermal expansion and hoop stress. Wall...
Wonder what experience folks might have out there with B31.4, API RP 1102 - Highway crossing, and ASCE Guidelines for the design of buried steel pipe.
I am evaluating a slurry pipeline, which will be buried, and will have Cat D8s crossing over it. Where the D8s go over it the pipeline will be...
I am having a very hard time finding a 22.5 degree 10" Sch. 40 elbow.
Is there anything in the ASME codes advising against cutting a 45 degree elbow down into a 22.5 degree elbow and prepping the cut end for buttwelds.
And this is for use on a slurry line, so is not technically pressure pipe.
I have some weld repairs to make to an api 5l x65 pipe flange face, the flange faces is pitted.
Was thinking of using a 7018 rod to do weld metal buildup and then machine the flange face.
Are there any specific heat treatment requirements or pre-heat / interpass temp requirements ?
Hello,
I am working on designing some pipe supports for a small bore piping system.
These pipe supports will likely consist of columns with small length cantilevers coming out of the columns and the pipes anchored to the cantilevers. The columns would be supported on the bottom with anchor...
I have read that installing socket welded piping in a 93% sulfuric acid system is not recommended, I am wondering why this is.
Reason I ask is I am installing a 3/4" or 1" piping system and how practical is it to buttweld piping this small ? Or can I just go with socket weld ?
Thanks,
Jon
Hello,
I am designing a piping system to handle 93% sulfuric acid at ambient temperature (no higher than 104 deg F) and am just wondering what is a suitable piping material.
Is 316L stainless good, or Hastelloy C-276 ? The pipe size will be 3/4" to 1".
Thanks,
Jon
Hello,
I am designing a small piping system for handling 93% sulfuric acid and was wondering if there were some guidelines around maximum velocity in piping to prevent erosion from the acid.
Thanks,
Hello,
I am looking for some guidance wih respect to calculating steam flow through an open ended vent pipe.
The vent is from a superheater header at 2000 psig and 1000 F. The vent pipe is a 2.5" XXS 122 foot long pipe vented to atmosphere. At the upstream end of the pipe there is a 2.5"...
