Hi all, I have come across a spec that requires PWHT based on material grades (P-Nos), regardless of thickness. This is likely to give distortion problems when welding thin components (1/8in or similar) made of F22. On the other hand, we risk failing the hardness test, if we try to qualify...
I have been asked for information on how to calculate the MPT (Minimum Pressurizing Temperature) for a hydrocracker heat exchanger.
Can anyone suggest provide an ASME B&PV reference or any other relevant standards or publications?
A design report I got hold of references a conference paper...
I am preparing some welding procedures for T23 tubes (7 to 15mm thick). This grade is a first time for us, although we have welded low-alloy grades before (91 and 92).
Is back-purging required for root runs in T23? I have found publications that recommend purging root runs for any low-alloy...
Hi everyone, I am looking for an international standard that provides requirements regarding acceptable distortion in piping (B31.3 does not).
Can anyone help?
Dear All,
I am a welding engineer working on a spreadsheet to estimate fabrication cost. Whilst the cost of welding alone is 'relatively easy' to estimate (considering duty cycles, labour costs, equipment depreciation etc), I am struggling with the cost of preheating.
I have found formulas in...
Dear All,
I am a welding engineer working on a spreadsheet to estimate fabrication cost. Whilst the cost of welding alone is 'relatively easy' to estimate (considering duty cycles, labour costs, equipment depreciation etc), I am struggling with the cost of preheating.
I have found formulas in...
I have found information in AWS D1.1 (various paragraphs, see 'plug welds' in the index) that defines hole sizes, shapes and spacing as well as weld size but I do not know the background.
Doies anyone know of other International/National standards that provide guidance on design/execution of...
I have found information in AWS D1.1 (various paragraphs, see 'plug welds' in the index) that defines hole sizes, shapes and spacing as well as weld size but I do not know the background.
Can anyone help?
I'd like to pick your brain of some AWS D 1.1 users on this.
We intend to use E81T1-Ni1 filler wire (AWS SFA-5.29, min YS 468MPa, min UTS 550MPa) to weld an EN S355 grade (min YS 355MPa), the reference code is AWS D1.1:2010.
The loading is classified as 'tension normal to the effective area'...
